Gossen Metrawatt M274A, M273A, M274B, M273D, M273W User guide

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Operating Instructions

METRAHITIM XTRA

(M273A/D/W)

& METRAHITIM E-DRIVE

Insulation Tester, Milliohmmeter, TRMS Multimeter, Inter-Turn Short Circuit Tester

(M274A/B)

3-447-035-03

7/5.20

Scope of Delivery (depending on instrument variant)

1kHz

1 METRAHIT IM XTRA or METRAHIT IM E-DRIVE multimeter

with rubber holster 1 Probe with start/stop and store/send function 1 KS17-2 cable set: 1 pair of safety measurement cables,

red/black, with 4 mm test tips 1 Type KC4 Kelvin clip (1 pair with METRAHIT IM XTRA) 1 Type KC27 Kelvin probe (with METRAHIT IM E-DRIVE only) 1 Quick change, rechargeable lithium polymer battery with

micro USB charging socket 1 USB mains power pack (5 V DC, 2 A) with cable and micro

USB charging plug 1 DAkkS calibration certificate 1 Hard case for the multimeter and accessories 1 Condensed operating instructions, German/English – Comprehensive operating instructions in German and English

available on the Internet for download at www.gossenme-

trawatt.com 1 Card with registration key

for the software

Overview Supply

Accessories Type Article No. M273S M274S METRAHIT IM XTRA METRAHIT IM E-DRIVE BT M274B X

LiIon module & USB charger

Mains module with electrical isolation and USB charger Z270E O O Remote probe Z270S Z270S X X

Cable set

1 pair Kelvin clips KC4 Z227A X O 1 pair Kelvin probes KC27 Z227B O O 1 Kelvin clip & 1 Kelvin probe KC&S Z227C — X Hard case HC40 Z270K X X COIL Adapter 10 μH ,,, 50 mH COIL Adapter 50mH Z270F O O COIL Adapter 10 μH ,,, 500 mH Adapter cable, 4 mm plug to 6 mm socket AK-4M/6F Z110L O O IZYTRONIQ Business Starter Licence S101S & Z956A

Z270A+

KS17-2

COIL Adapter XTRA Z270M O O

Legend

X = Standard O = Option — = not possible, not provided for

M273D X

Z270A, Z270G X X

GTY362003 P0002 X X

S101S & Z956A X X

Overview of Included Features

Function METRAHIT IM XTRA (BT)

METRAHIT IM E-DRIVE (BT)

VDC (Ri  9 M)

VAC / Hz TRMS (Ri  9 M)

TRMS (Ri  9 M)

AC+DC

TRMS (Ri  1 M)

AC+DC

range (interference voltage)

ISO

Hz (VAC)

Fuse

Current sensor transformation ratio

Hz (A AC) Insulation resistance RISO: test voltages

Inter-turn short circuit test (1 kV) with COIL adapter

Duty cycle measurement as %

RPM measurement

Resistance Rlo with 200 mA per EN 61557 / VDE 0413

Milliohm with 4-wire method, m with 200 mA Milliohm with 4-wire method, m with 1 A pulse

Fuse Resistance 

Continuity

Diode ... 5.1 V

Temperature: °C/°F TC type K and Pt100/1000

Capacitance

Min-Max / data hold

Test sequence

64 MBit memory

Bluetooth® interface

WiFi interface

3.5" TFT color graphic display

Probe with start/stop and send/store keys

Quick-change battery with USB charging

Mains module with electrical isolation and USB

WPC quick change battery for inductive charging

Protection

Measuring category

bandwidth

AC, AC+DC

DC, AC, AC+DC

With optional temperature sensors For 300,000 measured values, sampling rate adjustable from 0.1 seconds to 9 hours

/ Hz TRMS

1 mV : 1

METRAHIT IM XTRA BT

METRAHIT IM E-DRIVE BT

1000 V CAT III, 600 V CAT IV

✔

filter

✔

... 300 kHz

100 kHz

10 nA ... 1 A

1 A / 1000 V - 30 kA

• 10 • 100 • 1000 mA

... 30 kHz

• 100 • 250 • 500 • 1000 V

Option

✔ ✔

✔

✔ ✔

FF 1A/1000 V – 30 kA

✔ ✔ ✔ ✔ ✔

✔

20 steps

✔

Option

✔ ✔ ✔

Option

IP 52

Accessories (sensors, plug inserts, adapters, consumable materials)

The accessories available for your instrument are checked for compliance with currently valid safety regulations at regular intervals, and are amended as required for new applications. Currently up-to-date accessories which are suitable for your measuring instrument are listed on our website along with photo, order number, description and, depending upon the scope of the respective accessory, data sheet and operating instructions: www.gossenmetrawatt.de

Software Version

These operating instructions describe a multimeter based on software version 1.003.000. Refer to section 4.4.1 in order to query the respectively installed version number.

Current operating instructions for the latest firmware update are available for download from our website at www.gossenmetrawatt.com.

Please register at myGMC in order to continuously receive the latest information regarding current software and firmware, as well as instrument updates and options.

2 GMC-I Messtechnik GmbH

Contents Page Contents Page

1 Addresses .........................................................................4

1.1 Product Support .......................................................................... 4

1.2 Recalibration Service .................................................................. 4

1.3 Repair and Replacement Parts Service

Calibration Center and Rental Instrument Service ...................... 4

2 Safety Features and Precautions ..................................... 5

2.1 Use for Intended Purpose ...........................................................6

2.2 Meanings of Danger Symbols ..................................................... 6

2.3 Meanings of Acoustic Warning Signals ......................................6

3 Operating Overview .......................................................... 7

3.1 Connections, Keys, Rotary Switch, Symbols ..............................7

3.2 Symbols Used in the Digital Display .......................................... 7

3.3 Symbols Used for Rotary Switch Positions ................................ 8

3.4 User Interface Symbols in the Following Sections ..................... 8

3.5 Symbols on the Instrument ......................................................... 8

4 Initial Startup .................................................................... 9

4.1 Battery Pack ...............................................................................9

4.2 Mains Module ............................................................................. 9

4.3 Switching the instrument On ...................................................... 9

4.4 Querying or Setting Operating Parameters – General Setup ......9

4.4.1 Info > Version – Check Current Software Version ............................ 9

4.4.2 Language >German/English – Selecting the User Interface

Language ..................................................................................... 9

4.4.3 System > Date/Time – Setting Date and Time ................................9

4.4.4 System > Brightness – Digital Display Brightness ........................... 9

4.4.5 System > Display Zeros ............................................................... 10

4.4.6 System > Change Password ........................................................ 10

4.4.7 System > Display Profile – Digital Display View ............................. 10

4.4.8 System > Default Settings ........................................................... 11

4.4.9 System > Functions Expansion ....................................................11

4.4.10 Switching the Instrument Off ........................................................ 11

4.4.11 System > Auto-OFF – Automatic Shutdown .................................. 11

5 Control Functions ...........................................................12

5.1 Help ........................................................................................... 12

5.2 Selecting Measuring Functions and Measuring Ranges ........... 13

5.2.1 Automatic Range Selection .......................................................... 13

5.2.2 Manual Range Selection .............................................................. 13

5.2.3 Quick Measurements ..................................................................13

5.3 Zero Offset / Relative Measurements ....................................... 13

5.4 Display (TFT) ............................................................................. 14

5.4.1 Digital Display ............................................................................. 14

5.4.2 Analog Display ............................................................................ 14

Measured Value Storage – Data Function (auto-hold/compare) .....15

5.5

5.5.1 Saving Minimum and Maximum Values – “MinMax” ...................... 16

5.6 Measured Value Memory – STORE Function. ...........................16

5.6.1 Remote read-out and storage via the Z270S probe .......................16

Remote Read-Out and Storage via the PC – PUSH/PRINT Function .......16

5.6.2

5.7 Measurement Data Recording .................................................. 17

6.6.3 RPM Measurement – RPM AC ..................................................... 32

6.6.4 Direct and Pulsating Voltage Measurement, V DC and V (AC+DC) .. 33

6.7 Resistance Measurement “” .............................................. 34

6.8 Capacitance Measurement F ................................................ 35

Temperature Measurement with Resistance Thermometer

6.9

Temp RTD .......................................................................... 36

–

6.10 Temperature Measurement with Thermocouple – Temp TC . 37

6.11 Continuity Test .................................................................... 38

6.12 Diode Testing with Constant Current of 1 mA ..................... 38

6.13 Milliohm Measurement – Rlo (2-wire measurement) ............ 39

6.14 Milliohm Measurement – m/4 (4-wire measurement) ....... 40

6.14.1 Compensation of Cable Resistance .............................................. 40

6.14.2 Thermovoltage Compensation ...................................................... 40

6.14.3 Milliohm Measurement with 200 mA or 20 mA DC [m] .............. 41

6.14.4 Milliohm Measurement with 1 A Pulsating Measuring Current (automatic thermovoltage correction at 3

6.15 Current Measurement ........................................................... 42

6.15.1 Direct and Pulsating Current Measurement, Direct Connection,

– A DC and A (AC+DC) ............................................................... 43

6.15.2 Alternating Current and Frequency Measurement, Direct Connection,

– AAC and Hz ............................................................................. 44

6.15.3 Direct and Pulsating Current Measurement with Current Clamp Sensor

– ADC and A (AC+DC) ................................................................ 45

6.15.4 Alternating Current Measurement with Current Clamp Sensor

– AAC and Hz ............................................................................. 46

6.16 Measuring Sequences .......................................................... 47

 300 m

) .............................41

7 Interface Operation .........................................................49

7.1 Bluetooth Interface ................................................................... 49

7.2 WiFi Interface ........................................................................... 49

8 Characteristic Values ..................................................50

9 Maintenance and Calibration .......................................... 54

9.1 Displays – Error Messages ...................................................... 54

9.2 Battery Pack ............................................................................. 54

9.3 Fuse .......................................................................................... 55

9.4 Housing Maintenance ............................................................... 55

9.5 Measurement Cables ................................................................ 55

9.6 Returns and Environmentally Sound Disposal .......................... 55

9.7 Recalibration ............................................................................ 56

9.8 Manufacturer’s Guarantee ........................................................ 56

10 Accessories ....................................................................56

10.1 General ..................................................................................... 56

10.2 Technical Data for Measurement Cables

(included with KS17-2 cable set and Z270S probe) ................. 56

11 Index ...............................................................................57

6 Measurements ................................................................20

6.1 Enabling Parameter Changes ................................................... 20

6.2 Insulation Resistance Measurement – RISO Function ........... 20

6.2.1 Preparing for Measurement .........................................................20

6.2.2 Performing Insulation Measurement ............................................. 21

6.2.3 Ending the Measurement and Discharging .................................... 21

COIL

6.3 Inter-Turn Short Circuit Measurement –

6.3.1 Inter-Turn ShortCircuit Measurement with the

COIL TEST ADAPTER .................................................................. 22

Inter-Turn Short Circuit Measurement with COIL ADAPTER XTRA ...............25

6.3.2

6.4 Absorption Index Measurement – DAR ................................. 28

6.5 Polarization Index Measurement – PI ................................... 29

6.6 Voltage Measurement ........................................................... 30

6.6.1 Alternating Voltage and Frequency Measurement V AC and Hz with

Selectable Low-Pass Filter ........................................................... 31

6.6.2 Duty Cycle Measurement – Duty AC ............................................. 32

GMC-I Messtechnik GmbH 3

Function ........ 22

1 Addresses

1.1 Product Support

Technical Queries (use, operation, software registration)

If required please contact:

GMC-I Messtechnik GmbH

Product Support Hotline

Phone: +49 911 8602-0 Fax: +49 911 8602-709 e-mail: support@gossenmetrawatt.com

1.2 Recalibration Service

We calibrate and recalibrate all instruments supplied by GMC-I Messtechnik GmbH, as well as other manufacturers, at our service center, for example after one year within the framework of your test equipment monitoring program, as well as prior to use etc. See also section 9.7.

1.3 Repair and Replacement Parts Service Calibration Center* and Rental Instrument Service

If required please contact:

GMC-I Service GmbH Service Center Beuthener Straße 41 90471 Nürnberg, Germany Phone: +49-911-817718-0 Fax: +49-911-817718-253 e-mail: service@gossenmetrawatt.com www.gmci-service.com

This address is only valid in Germany. Please contact our respective representatives or subsidiaries for service in other countries.

* DAkkS calibration laboratory for electrical quantities, registration no.

D-K-15080-01-01, accredited per DIN EN ISO/IEC 17025

Accredited quantities: direct voltage, direct current value, direct current resistance, alternating voltage, alternating current value, AC active power, AC apparent power, DC power, capacitance, frequency, temperature

Competent Partner

GMC-I Messtechnik GmbH is certified in accordance with DIN EN ISO 9001.

Our DAkkS calibration laboratory is accredited by the Deutsche Akkreditierungsstelle GmbH (national accreditation body of the Federal Republic of Germany) under registration number D-K-15080-01-01 in accordance with DIN EN ISO/IEC 17025.

We offer a complete range of expertise in the field of metrology: from test reports and factory calibration certificates right on up to DAkkS calibration certificates.

Our spectrum of offerings is rounded out with free test equipment management.

As a full service calibration laboratory, we can calibrate instruments from other manufacturers as well.

4 GMC-I Messtechnik GmbH

2 Safety Features and Precautions

You have selected an instrument which provides you with high levels of safety.

This instrument fulfills all requirements of applicable EU directives and national regulations. We confirm this with the CE mark. The relevant declaration of conformity can be obtained from GMC-I Messtechnik GmbH.

The TRMS digital multimeter has been manufactured and tested in accordance with the following safety regulations: DIN EN 61010–1:2011 (VDE 0411–1:2011) and DIN EN 610102-033 (VDE 0411-2-033) When used for its intended purpose (see page 6), safety of the operator, as well as that of the instrument, is assured. Their safety is however not guaranteed, if the instrument is used improperly or handled carelessly.

In order to maintain flawless technical safety conditions, and to assure safe use, it’s imperative that you read the operating instructions thoroughly and carefully before placing your instrument into service, and that you follow all instructions contained therein. Make sure that the operating instructions are available to all users of the instrument.

Tests may only be executed by a qualified electrician.

The multimeter is equipped with an automatic socket blocking mechanism for your safety, and in order to safeguard your instrument. This mechanism is linked to the rotary switch and only allows access to those jacks which are actually required for the selected function. It also prevents the user from turning the rotary switch to impermissible functions after the measurement cables have already been plugged in.

Measuring Categories and their Significance per DIN EN 61 010-1

CAT Definition

Measurements in electrical circuits

which are not directly connected to the mains:

e.g. electrical systems in motor vehicles and aircraft, batteries etc.

Measurements in electrical circuits

which are electrically connected to the low-voltage mains:

via plug, e.g. in household, office and laboratory applications

Measurements in building installations:

III

stationary consumers, distributor terminals, devices connected permanently to the distributor

Measurements at power sources for low-voltage installations:

meters, mains terminals, primary overvoltage protection devices

The measuring category and the maximum rated voltage which are printed on the device apply to your measuring instrument, e.g. 1000 V CAT III.

Refer to section 10.2 regarding use of the measurement cables.

Observe the following safety precautions:

• The multimeter may not be used in potentially explosive atmospheres.

• The multimeter may only be operated by persons who are capable of recognizing touch hazards and taking the appropriate safety precautions. Touch hazards in accordance with the standard exist anywhere, where voltages of greater than 33 V (RMS) or 70 V DC may occur. Avoid working alone when taking measurements which involve touch hazards. Be certain that a second person is present.

• Maximum allowable voltage between the voltage measuring sockets or all connector sockets and ground is 1000 V for measuring category III and 600 V for measuring category IV.

• Be prepared for the occurrence of unexpected voltages at devices under test (e.g. defective devices). For example, capacitors may be dangerously charged.

• Make certain that the measurement cables are in flawless condition, e.g. no damage to insulation, no interruptions in cables or plugs etc.

• No measurements may be made with this instrument in electrical circuits with corona discharge (high-voltage).

• Special care is required when measurements are made in HF electrical circuits. Dangerous pulsating voltages may be present.

• Measurements under moist ambient conditions are not permitted.

• Be absolutely certain that the measuring ranges are not overloaded beyond their allowable capacities. Limit values are included in section 8, “Characteristic Values”, in the table entitled “Measuring Functions and Measuring Ranges” in the “Overload Capacity” column.

• The multimeter may only be operated with installed rechargeable

batteries or mains module. Dangerous currents and voltages are otherwise not indicated, and the instrument may be damaged.

• Weak (insufficiently charged) rechargeable battery If the “weak battery” icon appears in the battery level indicator, it’s no longer permissible to perform safety-relevant measurements. Furthermore, compliance with the listed specifications is no longer assured in the case of a weak rechargeable battery.

• The instrument may not be operated if the fuse cover, the rechargeable battery pack or the mains module has been removed, or if its housing is open.

• The input for the current measuring range is equipped with a fuse link. Maximum permissible voltage for the measuring circuit (= rated voltage of the fuse) is 1000 V AC/DC. Use specified fuses only (see page 52)! The fuse must have a

breaking capacity of at least 30 kA.

Opening the Instrument / Repairs

The instrument may only be opened by authorized, trained personnel in order to ensure flawless operation and to assure that the guarantee is not rendered null and void.

Even original replacement parts may only be installed by authorized, trained personnel.

If it can be ascertained that the instrument has been opened by unauthorized personnel, no guarantee claims can be honored by the manufacturer with regard to personal safety, measuring accuracy, compliance with applicable safety measures or any consequential damages.

If a guarantee seal is included and it has been damaged or removed, all guarantee claims are rendered null and void.

Repair and Replacement of Parts by Authorized, Trained Personnel

When the instrument is opened, voltage conducting parts may be exposed. The instrument must be disconnected from the measuring circuit before performing repairs or replacing parts. If repair of a live, open instrument is required, it may only be carried out by trained personnel who are familiar with the dangers involved.

Defects and Extraordinary Strains

If it may be assumed that the instrument can no longer be operated safely, it must be removed from service and secured against unintentional use. Safe operation can no longer be relied upon:

• If the device demonstrates visible damage

• If the instrument no longer functions, or if malfunctioning occurs

• After long periods of storage under unfavorable conditions (e.g. humidity, dust or extreme temperature (see “Ambient Conditions” on page 52)

GMC-I Messtechnik GmbH 5

2.1 Use for Intended Purpose

Attention!

• The multimeter is a portable device which can be held in the hand during the performance of measurements.

• Only those types of measurements described in section 6 may be performed with the measuring instrument.

• The measuring instrument, including measurement cables and plug-on test probes, may only be utilized within the specified measuring category (see page 56 and the table on page 5 regarding significance).

• Overload limits may not be exceeded. See technical data on page 50 for overload values and overload limits.

• Measurements may only be performed under the specified ambient conditions. See page 52 regarding operating temperature range and relative humidity.

• The measuring instrument may only be used in accordance with the specified degree of protection (IP code) (see page 53).

Data Backup

We advise you to regularly transfer your stored data to a PC in order to prevent potential loss of data in the test instrument. We assume no responsibility for any data loss.

Battery Pack Safety Precautions

The test instrument is powered by a rechargeable lithium-ion battery. Consequently, it’s absolutely essential to observe the following points:

• Temperature ranges: The test instrument with battery pack must not be exposed to direct sunlight or charged, operated or stored at high temperatures, for example in a car.

The following ambient conditions apply to the battery pack:

– Charging mode (10 ... 45 °C): The battery may only be charged

within this temperature range.

– Measuring mode (–10 ... 50 °C): The battery may only be used

within this temperature range.

– Storage (–20 ... 50 °C): The maximum storage temperature is

50 °C.

• Excessive depletion: The rechargeable battery’s safety circuit consumes minimal amounts of current. In order to prevent the battery from becoming fully depleted, the instrument should be connected to the mains for recharging at least once a year, and preferably at more frequent, regular intervals. In some cases it’s no longer possible to recharge a fully depleted battery, in which case it must be replaced by GMC-I Service GmbH.

2.2 Meanings of Danger Symbols

Warning concerning a point of danger (attention, observe documentation!)

Warning concerning dangerous voltage at the measurement input: U > 15 V AC or U > 25 V DC

2.3 Meanings of Acoustic Warning Signals

High-voltage warning: > 1000 V (intermittent acoustic signal)

Heavy current warning: > 1 A (continuous acoustic signal)

Excessive depletion should be avoided because the battery’s service life might otherwise be reduced, or the battery could fail. The battery pack is subject to selfdischarging at a rate of roughly 25% per year.

Battery pack transport: Observe the supplementary sheet with safety information for the Z270A or Z270G battery pack with rechargeable lithium-polymer battery (3-349-997-15 oder 3-447-030-15)!

The supplementary sheet with safety information for the Z270A/ Z270G battery pack is included with the manufacturer’s safety data sheet for the installed lithium-polymer battery.

6 GMC-I Messtechnik GmbH

3 Operating Overview

section 3.2



section 5.6

section 9.2

section 3.3

Max. 1000 V!

section 4.4.4 

section 3.4



section 3.5

Battery full

Battery OK

Battery weak

Battery (almost) dead, U < 3.3

Charge Levels

1 3 4

567

109

135

1415

REC

3.1 Connections, Keys, Rotary Switch, Symbols

3.2 Symbols Used in the Digital Display

1 Charging status LED (charging mode – yellow: battery is charging, green:

fully charged) 2 Display (TFT), see section 3.2 for meanings of symbols 3 Softkeys (menu -dependent keys for selecting switching functions and

parameters, and for starting/ending measurements) 4 STORE: Save key or push/print function for IZYTRONIQ 5 OK: Key for acknowledgment and for restarting the instrument from the

standby mode by pressing and holding 6

Rotary switch

7 DAkkS calibration seal

for measuring functions, (see page 8 for meanings of symbols

8 Connector sockets for current measurement with automatic blocking

 earthing input

A current measurement input

9 S+/S–: sense terminals for 4-wire measurements (m /4)

10 Extended connection for Z270S probe

(operating instructions 3-349-996-15)

Connector sockets for voltage measurement with automatic blocking

 earthing input

V, , Temp, M, , , COIL measurement input

12 ESC:

Operating mode menu:

Press key briefly: Exit the menu level – jump back to a higher level, exit

parameters entry without saving

Press and hold: The instrument is switched to the standby mode. Switch

back on by pressing and holding the OK key.

13 MENU: Key for accessing the five main menus. 14 Scroll keys:

 Increase parameter values

Operating mode menu: Selection of individual menu items

 Decrease values

Operating mode menu: Selection of individual menu items



Increase measuring range or move decimal point to right (



Decrease measuring range or move decimal point to left (

15 Brightness sensor

Man

function)

1 Momentary measuring function 2 Memory symbol 3 Important, in this case: Uext (interference voltage) or

warning regarding dangerous voltage: U > 15 V AC or U > 25 V DC

4 Battery charge level 5 Func: switch back and forth amongst the functions of a given rotary

switch position

6 Data MinMax: switch amongst “Data” (freeze measured value), “Min-Max

storage” and deactivate both functions

7 Man Auto: switch back and forth between manual and automatic measur-

ing range selection

8 Display of the selected measuring range with manual measuring range

selection:

Select a lower measuring range Select a higher measuring range

9 Selected test voltage

10 Select test voltage:

Select a larger test voltage Select a smaller test voltage

11 Digital display with decimal point and polarity display

Measuring range exceeded: OL is displayed

12 Scale for analog display 13 Polarity selection 14 Zero: Zero balancing active 15 Start/Stop: For measurements which are not started automatically 16 Ip: Test Current

GMC-I Messtechnik GmbH 7

3.3 Symbols Used for Rotary Switch Positions

ACDC

+=

Consecutive number

Registration number Date of calibration (year – month)

Deutsche Akkreditierungsstelle GmbH – calibration lab

XY123

2019-04

D-K-

15080-01-01

Switches

RISO 0/4 RISO M Insulation resistance measurement

Coil 1 Coil U-V, U-W, V-W [μs] Inter-turn short circuit test with optional COIL adapter

Coil 2 DAR [k/s] Dielectric absorption rate Coil 3PI [k/s] >Polarization index

V~ 0/5 VAC Alternating voltage, AC TRMS, full bandwidth

Hz 1 Hz Voltage frequency, full bandwidth

Hz 2 Duty AC %

Hz 3RPM AC

V~ 4V AC Fil

V 0/3 VDC

V 1V (AC+DC)

FUNC

Display Measuring Function

Uext

Uset Selectable test voltage: 50, 100, 250, 500or 1000 V

UISO Applied/measured test voltage during measurement

Pulsating voltage, TRMS DC + AC, 15 Hz ... 500 Hz, only for detection of interference voltage! (before starting measurement)

(COIL TEST ADAPTER or COIL ADAPTER XTRA)

Duty cycle measurement

RPM measurement

Alternating voltage, AC TRMS, with low-pass filter (1 kHz) Direct voltage DC clamp (V): Current clamp sensor

Pulsating voltage, TRMS

Additional Current Clamp Sensor Function  Clip = 1:1/10/100/1000

(via the “Setup for currently selected measurement” menu)

AC clamp (V): Current clamp sensor Hz client (V): Current clamp sensor

AC + DC clamp (V): Current clamp sensor

V 2V (AC+DC) Fil

 0/4  (DC) resistance

1F, nF, F Capacitance Temp. RT D 2 C Pt 100/1000 Temp. TC 3 C, type K Temperature, type K thermocouple

0/2  Continuity test with acoustic signal

Rlo 0R m/4 0R

A 0/4 ADC Direct current amperage

A 1 A (AC+DC) Pulsating current amperage, AC DC TRMS

A 2 AAC Alternating current amperage, AC TRMS

A 3 Hz Current frequency

Clip = off

LO/2L  2-wire milliohm measurement where IP = /+/- 200 mA LO/4W  4-wire milliohm measurement where IP = 200 mA or 1 A

Pulsating voltage, TRMS AC DC, with low-pass filter (1 kHz)

Temperature with Pt 100 / Pt 1000 resistance thermometer

V Diode voltage where I is constant

3.4 User Interface Symbols in the Following Sections

 ...  Scroll through main menu  ...  Scroll through submenu   Select decimal point,

increase/decrease measuring range

 Increase/decrease value

(test voltage for insulation resistance measurement or threshold for continuity test)

3.5 Symbols on the Instrument

Warning concerning a point of danger (attention, observe documentation!)

Ground

CAT III / IV

Measuring category III or IV device, see also “Measuring Categories and their Significance per DIN EN 61 010-1” on page 5

Continuous, doubled or reinforced insulation

Indicates European Conformity

Fuse for current measuring ranges, see section 9.3

This device may not be disposed of with the trash. Further information regarding the WEEE mark can be accessed on the Internet at www.gossenmetrawatt.com under the search term WEEE (see also section 9.6).

Calibration seal (blue seal):

8 GMC-I Messtechnik GmbH

4 Initial Startup

Attention!

Note

MENUOKESC

OKOKESC

4.1 Battery Pack

Be certain to refer to section 9.2 regarding correct installation of the battery pack!

Momentary battery capacity can be queried by clicking the Info item in the General Setup menu:

➭ Press the MENU key to this end.

➭ Then press the General Setup softkey.

➭ Select the Info parameter with the help of the  scroll keys.

The “Battery” parameter indicates the battery pack’s charge level as a percentage.

Disconnect the instrument from the measuring circuit before removing the battery pack for charging!

4.2 Mains Module

In preparation

4.4.2 Language >German/English – Selecting the User Interface Language

➭ Press the MENU key.

➭ Press the General Setup softkey.

➭ Select the Language parameter with the help of the

keys.

➭ Switch to the settings menu with the help of the  scroll key.

➭ Select the desired language with the

➭ Acknowledge by pressing the OK key. The input cursor jumps

back to the parameters list.

➭ Return to the main menu by pressing the ESC key or the MENU

key.

➭ The instrument is returned to the measuring mode after press-

ing the ESC key once more.

> General Setup >  Language  German/English

 2x

 scroll keys.

 scroll

4.3 Switching the instrument On

Switching the Instrument On Manually

➭ The instrument is switched on automatically after selecting

any rotary switch position other than OFF.

Electrical discharge and high frequency interference may cause incorrect displays to appear, and may disable the measuring sequence. Disconnect the device from the measuring circuit. Switch the instrument off and back on again in order to reset. If the problem persists, briefly dislodge the battery from the connector contacts (see also section 9.2).

4.4 Querying or Setting Operating Parameters – General Setup

4.4.3 System > Date/Time – Setting Date and Time

➭ Press the MENU key.

➭ Press the General Setup softkey.

➭ Select the System parameter with the help of the

keys.

➭ Switch to the submenu with the help of the

➭ Select the Date or Time parameter with the help of the 

scroll keys.

➭ Acknowledge the selected parameter by pressing the OK key.

The entry cursor jumps to a random position in the settings menu.

➭ Select the desired entry position with the   scroll keys and

change the respective value with the  scroll keys.

➭ Acknowledge the change with the OK key. The entry cursor

once again marks the entire parameter line.

➭ Return to the main menu by pressing the ESC key twice or the

MENU key once.

➭ The instrument is returned to the measuring mode after press-

ing the ESC key once more.

> General Setup

 System   Time

09:50:20

   3x

 scroll

 scroll key.

> General Setup

4.4.1 Info > Version – Check Current Software Version

➭ Press the MENU key.

➭ Press the General Setup softkey.

➭ Select the Info parameter with the help of the

➭ The version parameter indicates the current software (firm-

ware) revision level.

➭ The instrument is returned to the measuring mode after press-

ing the ESC key twice.

> General Setup >

GMC-I Messtechnik GmbH 9

 Info > Version

 scroll keys.

4.4.4 System > Brightness – Digital Display Brightness

Brightness of the digital display can be set between 1 (minimum brightness) and 9 (maximum brightness).

It can also be set to automatic. In this case, digital display brightness is adjusted depending on the intensity of the light which strikes the brightness sensor.

> General Setup  System   Brightness:

 System   Date

13:06:2017

1 ... 9, Auto

  

 3x

4.4.5 System > Display Zeros

OKOKESC

< > BackSp Enter

Entry Field Keypad

Shift

Entry Prompt

Entry field:

Delete characters from right

Entry field:

Accept password from entry field

Entry field:

Scroll left

Entry field:

Scroll right

Keypad:

Switch between upper/ lower case and symbols

Char. Selection in the Keypad

Transfer character from the keypad to entry field

OKOKESC

The Display Zeros parameter can be used to specify whether leading zeros will appear or be suppressed at the measured value display.

Entering the Old Password

> General Setup  System  

Change Password

> General Setup

 System   Display Zeros:

000.0 / 0.0

 3x

4.4.6 System > Change Password

A password must be entered in order to adjust the parameters for each of the following measurements:

• RISO: change test voltage

•M/4: change test current

The default password is “METRAHIT”. If necessary, an individual password can be assigned via the Change Password parameter.

Password protection is not activated with the default setting, i.e. “METRAHIT”. An individual password must be entered in order to activate this function.

Password Characteristics

Maximum length 31 characters Composition: any desired alphanumeric characters

Keyboard for Entering Text

Press the MENU key and then press the “General Setup” softkey. Select the System menu with the help of the to the submenu with the help of the

 scroll key and select the

 scroll key. Switch

Change Password parameter using the  scroll keys. After acknowledging the Change Password parameter by pressing the OK key, “Old Password” appears in the header in order to prompt you to enter your current password.

Your current password is entered using the alphanumeric keyboard. Select the individual characters from the keypad using the scroll keys to this end. The position of the cursor is indicated by the green background at the respective key. Acknowledge the selected character by pressing the OK key, after which the character is transferred to the entry field. The last entered character or characters can be deleted with the help of the BackSp (backspace) key. You can move the blinking cursor in the entry field to the desired position within the word using the “<” or “>” softkey, in order to add characters or delete them with the help of the BackSp softkey. The Shift softkey can be used to switch back and forth between upper and lower case letters, as well as numerals and special characters. A fully entered (old) password is accepted by pressing the Enter key. “New Password” appears in the header in order to prompt you to enter a new password.

Entering the New Password

Enter a new password as described above. After acknowledging by pressing the Enter softkey, “Confirm Password” appears at the display and prompts you to enter the new password once again. Proceed as described above to enter the password again, and then acknowledge by pressing OK. If the exactly the same password has been entered both the first and the second time, the following message appears in order to indicate that the password has been successfully changed: “The password has been changed”.

The menu mode is exited by pressing ESC three times and the instrument is returned to the measuring function.

4.4.7 System > Display Profile – Digital Display View

Two different views can be selected here – black lettering against a bright background or vice versa.

> General Setup

Default setting: White lettering against a dark background

 System   Display Profile:

Inverted or Normal



10 GMC-I Messtechnik GmbH

4.4.8 System > Default Settings

Note

ESC

All of the settings which you have changed can be returned to their default settings here. The following warning appears after pressing the OK button: “Reset?”. The parameter settings are not reset until you acknowledge with “Yes” (scroll with press OK). Resetting can be aborted by scrolling with  to No and pressing OK.

> General Setup

 System   Default Settings:

Yes / N o Pro m pt

 

 to Yes and

4.4.10 Switching the Instrument Off

Switching the Instrument Off Manually

➭ The instrument is switched off automatically by setting the ro-

tary switch to the OFF position. The display goes blank.

4.4.11 System > Auto-OFF – Automatic Shutdown

The period of time after which the instrument is shut down automatically regardless of whether a measuring or a menu view is open can be set to a value within a range of 10 to 59 minutes.

The instrument is switched off automatically if the measured value remains unchanged for a long period of time (maximum measured value fluctuation of approx. 0.8% of the measuring range per minute or 1C or 1  per minute), and if none of the keys or the rotary switch have been activated before a selected period of time in minutes has elapsed. Shutdown is acknowledged with a brief acoustic signal.

The password for changing the test voltage for insulation resistance measurement is reset to METRAHIT.

The selection of settings which deviate from default values, such as “Bluetooth = On” or “Brightness = Auto”, may reduce the service life specified in the characteristic values.

4.4.9 System > Functions Expansion

You can buy additional functions. After concluding your purchase, you’ll receive a password which is used to enable additional functions.

> General Setup

Press the MENU key and then press the “General Setup” softkey. Select the System menu with the help of the to the submenu using the  scroll key and then select the Func- tions Exp. parameter using the  scroll keys. After acknowledg- ing the Functions Exp. parameter by pressing the OK hard key, a list of possible function expansions appears. Additional functions which have not been enabled are identified in the list by means of a red padlock.

Select the previously purchased function expansions with the help

 scroll keys. After acknowledging the function by press-

of the ing the Activate softkey, “Password” appears in the header prompting you to enter your current password.

Your current password is entered using the alphanumeric keyboard. Select the individual characters from the keypad using the scroll keys to this end. The position of the cursor is indicated by the green background at the respective key. Acknowledge the selected character by pressing the OK key, after which the character is transferred to the entry field. You can delete the last entered character(s) with the help of the BackSp (backspace) softkey. You can move the blinking cursor in the entry field to the desired position within the word using the “<” or “>” softkey, in order to add characters or delete them with the help of the BackSp softkey. The Shift softkey can be used to switch back and forth between upper and lower case letters, as well as numbers and special characters.

Confirm the password by pressing the Enter softkey. Successful enabling is indicated by means of a message. The enabled additional functions are then identified in the list by means of a green checkmark.

 System   Functions Exp.

 scroll key. Switch

> General Setup

 System   Auto-OFF:

10 ... 59 min/Off



Exceptions

Transmission and memory mode operation, continuous operation and whenever a dangerous voltage is applied to the input (U > 15 V AC or U > 25 V DC).

Deactivation (continuous operation)

Automatic shutdown can be deactivated. Set the Auto-OFF parameter to Off in the System submenu of the

General Setup menu to this end.

GMC-I Messtechnik GmbH 11

5 Control Functions

1/3

2/3

ESC

2/3

5.1 Help

The following information can be displayed for switch positions and basic functions after they have been selected with the rotary selector switch:

• Explanation of the measurement

• Measuring ranges

• Wiring diagram

➭ Press the MENU key to this end.

➭ Then press the “Help for currently selected measurement”

softkey. Comments concerning the measurement are displayed.

➭ By pressing the 1/3 softkey, the measuring ranges and test

voltages (2/3) are shown on the display.

➭ The wiring diagram (3/3) is displayed by pressing the 2/3 soft-

key.

➭ You can return to the help text (1/3) by pressing the 3/3 soft-

key.

➭ Press the ESC key once to return to the menu.

➭ The display can be returned to the measurement by pressing

the ESC key.

12 GMC-I Messtechnik GmbH

5.2 Selecting Measuring Functions and Measuring Ranges

Note

5.2.1 Automatic Range Selection

The multimeter is equipped with auto-ranging for all measuring functions except for temperature measurement, as well as diode and continuity testing. Auto-ranging is active as soon as the instrument is switched on. The instrument automatically selects the measuring range which allows for highest possible resolution of the applied quantity. When the instrument is switched to frequency measurement, the previously selected voltage measuring range remains active.

AUTO-Range Function

The multimeter is switched automatically to the next higher range at (3099 d + 1 d  0310 d), and to the next lower range at (280 d – 1 d  2799 d).

In the case of high resolution (available depending upon measuring function), the multimeter is switched automatically to the next higher range at (30,999 d + 1 d  03100 d), and to the next lower range at (2800 d – 1 d  27,999 d).

5.2.2 Manual Range Selection

Auto-ranging can be deactivated and measuring ranges can be selected manually in accordance with the following table by pressing the Man / Auto button.

The desired measuring range can then be selected with the

 or  scroll key.

The instrument is automatically returned to automatic range selection when the Man / Auto key is pressed, the rotary switch is activated or the instrument is switched off and back on again.

Overview: Auto-Ranging and Manual Range Selection

Function Display

Man / Auto

Range switching sequence for:

V: 300 mV* Hz: 300 Hz

:

300



 or 

Man / Auto

* Only via manual range selection for V AC



300A 3 mA 30 mA 300 mA 1 A

A : 0.3 A  3 A  30 A 300 A

30 nF

RISO:

300 k

Return to automatic measuring range selection Auto

Manual mode active:

utilized measuring range is fixed



3 V 30 V 300 V 1000 V



3 kHz 30 kHz 300 kHz (Hz(U))

3 k



30 k



300 nF 3 F 30F

 3 M

 30 M

 300 M

300 k



3 M

300F

 3000 M



Man



The multimeter is held in the selected measuring range. If the range limit is exceeded, “OL” appears at the display. You should then switch to the next higher measuring range with the help of

 scroll key.

the

5.2.3 Quick Measurements

Measurements performed using a suitable fixed measuring range are executed more quickly than those which utilize automatic range selection. Quick measurement is made possible with the following two functions:

• Manual measuring range selection, i.e. by selecting the measuring range with the best resolution (see section 5.2.2)

•With the DATA function (see section 5.5) In this way, the appro- priate measuring range is selected automatically after the first measurement and the second measurement is executed more quickly.

5.3 Zero Offset / Relative Measurements

Zero offset or a reference value for relative measurements can be stored to memory depending upon deviation from the zero point:

Deviation from zero point – with short-circuited measurement cables for V, , A – with open input for capacitance unit of measure F

0 ... 200 digits

Display

ZERO

The relevant reference or correction value is deducted individually for the respective measuring function as an offset from all future measurements and remains in memory until deleted, or until the multimeter is switched off.

Zero balancing and reference value adjustment can be used with auto-ranging, as well as for manual measuring range selection.

Note:

Zero offset is available for the following measuring functions and switch positions: RISO, Coil, DAR, PI, Hz, Duty AC, RPM AC, , Temp RTD (the RLeads function is offered here as an alternative), Temp TC, Continuity, Diode, R pressing the START key!) and R

/2L (ZERO is also activated after

/4L (the thermal compensation

function is offered here as an alternative).

Zero Balancing

➭ Plug the measuring cables into the instrument and connect

the free ends to each other, except for capacitance measurement and current measurement in which case the ends of the cables are not connected to each other.

➭ Briefly press the Zero softkey.

The value measured at the moment the key is pressed serves as a reference value. The instrument acknowledges zero balancing with an acoustic signal, and “Zero” and the reference value appear at the display. The Zero softkey is displayed with a green background.

➭ Zero balancing can be cleared by once again pressing the

Zero softkey.

As a result of TRMS measurement, the multimeter displays a residual value of 1 to 10/35 digits with short-circuited measurement cables as the zero point for V AC / I AC or V(AC+DC) / I (AC+DC) measurements (non-linearity of the TRMS converter). This has no influence on specified accuracy above 1% of the measuring range (or 3% in the mV, V(AC+DC) ranges).

Setting the Reference Value

➭ Plug the measuring cables into the instrument and measure a

reference value (max. 50% of measuring range).

➭ Briefly press the Zero softkey.

The instrument acknowledges storage of the reference value with an acoustic signal and the “ZERO” symbol appears at the display. The value measured at the moment the key is pressed serves as a reference value.

➭ The reference value can be cleared by once again pressing

the Zero softkey.

Notes Regarding Relative Measurement

• Relative measurement effects the digital display only. The analog display continues to read out the original measured value.

• In the case of relative measurement,  F or AC quantities may also appear as negative values.

The selected measuring range remains active for the subsequent series of measurements with these two functions.

GMC-I Messtechnik GmbH 13

5.4 Display (TFT)

5.4.1 Digital Display

Measured Value, Unit of Measure, Type of Current, Polarity

The measured value with decimal and plus or minus sign appears at the digital display. The selected unit of measure and current type are displayed as well. A minus sign appears to the left of the value during the measurement of zero-frequency quantities, if the plus pole of the measured quantity is applied to the “” input. The Display Zeros parameter can be used to determine whether leading zeros will appear or be suppressed at the measured value display (see section 4.4.5).

Exceeded Measuring Range

If the upper range limit of 1000 digits is exceeded “OL” (overload) appears at the display. Exceptions: “OL” appears at the display as of 1030.0 V in the case of voltage measurement in the 1000 V range, as of 5100 V for diode testing and as of 1.100 A in the 1 A range.

5.4.2 Analog Display

Measured Value, Polarity

The analog display demonstrates the dynamic performance of a moving-coil mechanism. This display is especially advantageous for observing measured value fluctuation, and for balancing procedures.

Display as a horizontal (green) bar which indicates the current measured value in real-time.

The analog scale displays a small negative range for the measurement of zero-frequency quantities with positive measured values, allowing for precise observation of measured value fluctuation around zero. If the measured value exceeds a certain negative range, polarity is reversed at the analog display.

The analog scale displays a small positive range for the measurement of zero-frequency quantities with negative measured value, allowing for precise observation of measured value fluctuation around zero in this case as well.

Scaling of the analog scale is automatic. This is very helpful for manual measuring range selection.

Exceeded Measuring Range

Exceeding the measuring range is indicated exclusively via the digital display.

Refresh Rate

The analog display is refreshed 40 times per second.

14 GMC-I Messtechnik GmbH

5.5

Note

V, A, Hz

t [s]

100%

10%

Activated

Reactivated

Save

3000 Digits

Of Measuring Range

F, %

Measured Value Storage – Data Function (auto-hold/compare)

General

An individual measured value can be automatically “frozen” with the DATA function (auto-hold).

Applications

This function is useful, for example, when contacting the measuring points with the test probes requires your full attention. After the measuring signal has been applied and the measured value has settled in in accordance with the “condition” listed in the table below, the measured value is frozen at the digital display and an acoustic signal is generated. The test probes can now be removed from the measuring points, and the measured value can be read from the digital display. If the measuring signal falls below the value specified in the table, the function is reactivated for storage of the next value.

The Data function can be activated in all measuring functions. This is possible for the following functions after measurement has been started: RISO, R

/2L and RLO/4L.

Procedure

Apply the measured quantity to the instrument and set the measuring range with the Man / Auto softkey before activating the Data function with the Data / MinMax softkey. Man appears at the display with a green background. After activating the Data function with the corresponding softkey, Man is grayed out and cannot be changed until Data / MinMax is pressed again three times for deactivation. Data appears at the display with a green background. If automatic measuring range selection was active prior to activation of the Data function, switching to manual measuring range selection is also disabled as long as the MinMax function is active.

Data and the associated value appear between the digital and analog displays.

Condition Response from Instrument

Meas.

Function

V, A, F, Hz, %> 10%



V, A, F, Hz, %< 10%



Measuring

Signal

rdg.

0L

= 0L

Display

Data + MV

displayed

Stored MV

cleared

Acous-

tic

1 x

2 x

1 x

Function

Data

Activate Short

Save (stabilized measured

value)

Reactivate

Change to

MinMax

Reactivation results from falling short of specified measured value limits.

Two acoustic signals are generated the first time a measured value is saved as a reference value. For subsequent data hold, two acoustic signals are only generated if the currently frozen value deviates from the first saved value by less than 100 digits.

Data / Min-

Key

Max

Short

Key: MV = measured value, MR = measuring range

Example

The voltage measuring range is set manually to 30 V. The first measured value is 5 V and is stored to memory because it’s greater than 10% of the measuring range (= 3 V), and is thus reliably above the background noise level. As soon as the measured value drops to less than 10 % of the measuring range, i.e. amounts to less than 3 V which corresponds to removal of the test probes from the measuring point, the instrument is ready to store a new value.

Measured Value Comparison (DATA Compare)

If the currently frozen value deviates from the first saved value by less than 100 digits, the acoustic signal is generated twice. If deviation is greater than 100 digits, only a brief acoustic signal is generated.

The Data function has no effect on the analog display, at which the current measured value continues to appear. However, when the digital display is “frozen”, the decimal point is fixed as well (fixed measuring range, Man appears with a gray-green background). The selected measuring range cannot be manually changed as long as the Data function is active.

The Data function is deactivated by briefly pressing the Data / Min- Max softkey three times, if you switch to the MinMax function, when the measuring function is changed or when the instrument is switched off and back on again.

GMC-I Messtechnik GmbH 15

5.5.1 Saving Minimum and Maximum Values – “MinMax”

Note

START

STORE

Test T i p

Safety Cap

Safety Collar

REC

S– A

V

Tem p

/4

COIL

S+

KS17-2

General

Minimum and maximum measured values applied to the measuring instrument’s input after the MinMax function has been activated can be “frozen” at the display.

Applications

The most important use of this function is the determination of minimum and maximum values during long-term measured value observation. The MinMax function can be activated in all measuring functions. This is possible for the following functions after measurement has been started: RISO, R

/2L and RLO/4L.

The MinMax function has no effect on the analog display, at which the current measured value continues to appear.

Procedure

Apply the measured quantity to the instrument and set the measuring range with the Man / Auto softkey before activating the Min- Max function with the Data / MinMax softkey. Man appears at the display with a green background. After activating the MinMax function with the corresponding softkey, Man is grayed out and cannot be changed until MinMax is pressed again for deactivation. MinMax appears at the display with a green background. If automatic measuring range selection was active prior to activation of the MinMax function, switching to manual measuring range selection is also disabled as long as the MinMax function is active.

Both Min and Max, as well as the associated values, are displayed between the digital and analog displays along with the time of their occurrence.

The MinMax function is deactivated by briefly pressing the Data / MinMax softkey, when the measuring function is changed or when the instrument is switched off and back on again.

As opposed to the Data function, the MinMax function can also be used for temperature measurement.

The MinMax function is reset by pressing the ESC key. After pressing Data / MinMax once again, the minimum and maxi-

mum values are displayed together with the average value (“Avg.”). The Min Avg Max display appears without timestamp.

MinMax Function

Activate

and save

Save and

display

Stop Short Are deleted

Data /

MinMax

Key

Short

Min. and Max.

Measured Values

Are

saved

Storage continues in

background,

new min. and max. values are

displayed.

Response from Instrument

Display

Min + MV

Max + MV

Current

Measured value

Stored min. value 1 x

Stored max. value 1 x

cleared

Acous-

tic

Signal

1 x

5.6 Measured Value Memory – STORE Function.

The following options are available for the storage of measured values:

• Store at instrument by pressing the STORE key on the instrument

• Store at instrument by pressing the STORE key on the probe

• Store at the PC by triggering the PUSH/PRINT function in the report generating program IZYTRONIQ

5.6.1 Remote read-out and storage via the Z270S probe

The probe with integrated control unit permits remote triggering at difficult to access places, and at locations which require your full attention. The probe can be used for all measuring functions except for current measurement. The connector cable is shielded against interference.

➭ Connect the probe’s double plug to the voltage socket (V).

➭ Connect the KS17-2 safety measurement cable to the ground

socket.

➭ Establish contact with the measuring point.

➭ Start the respective measuring function by pressing the START

key on the probe.

➭ As soon as the measured value has settled in, it can be stored

by pressing the STORE key on the probe. Alternatively, the measured value can be stored with the help of the STORE key on the instrument.

The REC storage symbol appears briefly in the header in order to visualize the storage process.

Electrical Safety

Maximum rated voltage 300 V

Measuring category

Maximum rated current 1 A 1 A 16 A With safety cap attached — Without safety cap — — 

600 V

CAT IV CAT III CAT II

Measurements per DIN EN 61010-031 may only be performed in environments in accordance with measuring categories III and IV with the safety cap attached to the control unit’s test tip.

In order to establish contact inside 4 mm sockets, the safety cap has to be removed by prying open the snap fastener with a pointed object (e.g. the other test probe).

5.6.2 Remote Read-Out and Storage via the PC – PUSH/PRINT

Function

The procedure for storage via the PUSH/PRINT function is described in the online help included with IZYTRONIQ report generating software.

600 V

16 GMC-I Messtechnik GmbH

5.7 Measurement Data Recording

System

Memory

Interface Information Language

General Setup

Recording Record type Sampling rate Recording time Hysteresis Trigger Trigger, low limit Tri gger , high lim it Groups Clear memory

Start Periodic 00:00.5 Unlimited Off Within +00000 +01000 ... ...

The multimeter is capable of recording measurement data with adjustable sampling rates, hysteresis and trigger conditions for long periods of time in the form of measurement series (Parameter Record type = Periodic). Data are stored to a battery-backed memory module, and are retained even after the multimeter is switched off. The system acquires measured values relative to real-time.

Momentary or stored measurement data can be read out via a bidirectional wireless interface, Bluetooth or WiFi, or the USB port at the optional mains module. IZYTRONIQ software is required to this end.

See also interface operation in section 7.

➭ First set the sampling rate for memory mode operation (see

below).

➭ Set recording time to Unlimited or to a value within a range of

0:00:00 to 90:00:00.

➭ Select an hysteresis in order to assure efficient use of memory

capacity.

➭ Select a trigger function if required.

➭ Check current memory occupancy (see below).

➭ Before starting lengthy measured value recordings, check the

battery’s charge level (see section 4.1) or use the mains module.

➭ Start memory mode operation (see below).

➭ First select the desired measuring function and an appropriate

measuring range.

Setting the Record Type

In this menu, you can choose between a definable periodic and fixed sampling rate (parameter Periodic) and a one-off storage of a data value by means of the STORE key (parameter Data Value).

➭ Press the MENU key.

➭ Press the General setup softkey.

➭ Select the Memory menu with the

 scroll keys.

➭ Switch to the submenu with the help of the  scroll key.

➭ Select the Record type parameter with the

 scroll keys.

➭ Acknowledge the selected parameter by pressing the OK key.

➭

Change the respective value using the  scroll keys.

➭ Acknowledge the change with the OK key. The entry cursor

once again marks the entire parameter line.

> General setup

 Memory   Record type

Periodic / Data Value

Setting the Sampling Rate

This parameter cannot be set during memory mode operation. Proceed as follows in order to set the sampling rate:

➭ Press the MENU key.

➭ Press the General Setup softkey.

➭ Select the Memory menu with the

➭ Switch to the submenu with the help of the

➭ Select the Sampling Rate parameter with the

 scroll keys.

 scroll key.

 scroll keys.

➭ Acknowledge the selected parameter by pressing the OK key.

➭ Change the respective value using the

 scroll keys

[h:mm:ss] or [mm:ss:s/10].

➭ Acknowledge the change with the OK key. The entry cursor

once again marks the entire parameter line.

> General Setup

 Memory   Sampling Rate

[h:mm:ss] / Data Value

Adjusting Recording Time

This parameter cannot be set during memory mode operation. Proceed as follows in order to set recording time:

➭ Press the MENU key.

➭ Press the General Setup softkey.

➭ Select the Memory menu with the

➭ Switch to the submenu with the help of the

➭ Select the Recording Time parameter with the

➭ Acknowledge the selected parameter by pressing the OK key.

➭ Change the respective value using the

[h:mm:ss].

➭ Acknowledge the change with the OK key. The entry cursor

once again marks the entire parameter line.

 scroll keys.

 scroll key.

 scroll keys.

 scroll keys

> General Setup

 Memory   Recording Time

[h:mm:ss]

GMC-I Messtechnik GmbH 17

Setting Hysteresis

Note

The hysteresis setting allows for efficient use of memory space. During memory mode operation, new measured data are only saved if they deviate from the previously stored value by an amount which exceeds the selected hysteresis value.

Hysteresis can be selected in steps from 1 to 10,000 digits. These digits are related to the measuring range as follows: The position of the set digit in the specified hysteresis value corresponds to the same position within the measuring range, although counting is started at the left.

Example: A specified hysteresis of 00100 for the 300.00 V measuring range means that only those measured values which deviate from the last measured value by more than 001.00 V are saved to memory.

Due to the fact that the value is specified in digits (highest place all the way to the left), and thus depends on the measuring range, it’s advisable to use the function with a fixed measuring range only.

This parameter cannot be set during memory mode operation. Proceed as follows in order to activate and set hysteresis:

➭ Press the MENU key.

➭ Press the General Setup softkey.

➭ Select the Memory menu with the

➭ Switch to the submenu with the help of the

➭ Select the Hysteresis parameter with the help of the

 scroll keys.

 scroll key.

 scroll

keys.

➭ Acknowledge the selected parameter by pressing the OK key.

➭ If the parameter is set to off, activate hysteresis by a pressing

the  scroll key.

➭ Then select the desired entry position within the parameter

using the (00000 digits) with the

  scroll keys and change the respective value

 scroll keys.

➭ Acknowledge the change with the OK key. The entry cursor

once again marks the entire parameter line.

> General Setup

 Memory   Hysteresis

➭ Hysteresis is deactivated again by selecting the first digit or

the leading zero of the display hysteresis value, pressing the

 scroll key and acknowledging with OK.

Trigger Mode Operation

The Off, Outside and Within settings can be used to specify how measured value recording is started and stopped:

• Trigger = Off: Storage is started with Recording > Start and ended with Recording > Stop.

• Trigger = Outside: Recording is started as soon as a measured value occurs which is outside of the selected measuring limits, and is stopped as soon as this is no longer the case, or after selected Recording Time is exceeded.

• Trigger = Within: Recording is started as soon as a measured value occurs which is within a specified band, and is stopped as soon as this is no longer the case, or after maximum Record- ing Time has elapsed.

The band is specified with the help of the lower trigger limit (Trigger Low Limit) and the upper trigger limit (Trigger High Limit). The limits are entered in digits and are defined by the upper range limit. In the case of DC, for example, this is 30.000 (–30.000 to +30.000).

For measuring functions with a minimal measuring-range span, for example R

or m/4 with 3000 digits, setting the trigger

threshold above this measuring range limit does not make sense. It’s thus advisable to perform measurement with a fixed measuring range.

Actual measurement is always executed using the selected sampling rate.

Measurements performed close to the trigger level may result in an incorrect display. If this is the case, select a smaller voltage measuring range. In the case of measured values which are much higher than the expected results, the input signal may be distorted. Perform measurement with activated 1 kHz low-pass filter in this case.

Activating the Trigger

The trigger function cannot be set during memory mode operation. Proceed as follows in order to activate and set the trigger function:

➭ Press the MENU key.

➭ Press the General Setup softkey.

➭ Select the Memory menu with the

 scroll keys.

➭ Switch to the submenu with the help of the  scroll key.

➭ Select the Trigger parameter with the

 scroll keys.

➭ Acknowledge the selected parameter by pressing the OK key.

➭ Select the respective function (within, outside or off) with the

help of the

 scroll keys.

➭ Acknowledge the change with the OK key. The entry cursor

once again marks the entire parameter line.

> General Setup

 Memory   Trigger

Adjusting the Trigger Threshold

These parameters cannot be set during memory mode operation. Proceed as follows in order to set the upper and lower trigger thresholds:

➭ Press the MENU key.

➭ Press the General Setup softkey.

➭ Select the Memory menu with the

➭ Switch to the submenu with the help of the  scroll key.

➭ Select the Trigger Low Limit or Trigger High Limit parameter with

the help of the

 scroll keys.

➭ Acknowledge the selected parameter by pressing the OK key.

➭ Select the desired entry position within the parameter using

the

  scroll keys and change the respective value with the

 scroll keys.

➭ Acknowledge the change with the OK key. The entry cursor

once again marks the entire parameter line.

> General Setup

 Memory   Trigger Low Limit

+00000 digits / Trigger High Limit +00000 digits

 scroll keys.

18 GMC-I Messtechnik GmbH

Creating Groups

Groups can be created here in order to be able to sort measured values when they’re saved. As is also the case when the password is changed, entries are made using a keyboard which appears at the display (see section 4.4.6). Before starting the respective measurement, select a suitable group from the list you’ve created to which the measured values will be saved.

> General Setup  Memory   Groups

Querying Memory Occupancy

You can query memory occupancy from within the “Info” menu before as well as during the save operation.

Memory occupancy range: 000.1% ... 099.9%.

Ending Recording

Proceed as follows in order to stop recording:

➭ Press the MENU key.

➭ Press the General Setup softkey.

➭ Select the Memory menu with the

➭ Switch to the submenu with the help of the

➭ Select the Stop Recording parameter with the

➭ Acknowledge the selected parameter by pressing the OK key.

The “Start” setting changes to “Stop”. The following message appears: “Measurement has been ended”. The red “REC” symbol is cleared from the display.

> General Setup

 Memory   Stop Recording

 scroll keys.

 scroll key.

 scroll keys.

> General Setup  Info > Memory Occupancy x.x%

Starting Recording via Menu Functions

Proceed as follows in order to start recording:

➭ Press the MENU key.

➭ Press the General Setup softkey.

➭ Select the Memory menu with the

➭ Switch to the submenu with the help of the  scroll key.

➭ Select the Start Recording parameter with the

➭ Acknowledge the selected parameter by pressing the OK key.

The “Start” setting changes to “Stop”. The following message appears: “Measurement has begun.” At the same time, “REC” appears in red to the left of the battery level display.

> General Setup  Memory   Start Recording

> Stop

➭ The display is returned to the measuring function by pressing

the ESC key three times.

 scroll keys.

> Start

➭ The display is returned to the measuring function by pressing

the ESC key three times.

➭ Memory mode operation can also be exited by switching the

multimeter off.

Clearing Memory (deleting measured values)

This function deletes all measured values from memory! This function cannot be executed during memory mode opera-

tion.

> General Setup

The following security prompt appears before memory is cleared: “Clear memory?”. This prompt must be acknowledged with “Yes” via the function key (not with OK).

Confirmation is displayed at the end of the operation: “Memory has been cleared.”

 Memory   Clear Memory

GMC-I Messtechnik GmbH 19

6 Measurements

Note

00.00



Short circuit the measurement cables.

0V!



Te mp

S– A

V

Tem p

m/4

COIL

S+

Interference Voltage Detection

RISO

COIL

6.2 Insulation Resistance Measurement – RISO Function

6.1 Enabling Parameter Changes

A password must be entered in order to adjust the parameters for each of the following measurements:

• RISO: change test voltage

•m/4: change test current

Entering the Password for Changing Parameters

As soon as you attempt to change, for example, test voltage U via the  scroll keys, the “Password” menu appears. Enter the current password as described in section 4.4.6.

If you’ve forgotten your password, please contact our product support department (see phone number in section 1.1).

set

Changing the Password

A previously selected password can be changed in the “General Setup” menu (see section 4.4.6).

6.2.1 Preparing for Measurement

Checking the Measurement Cables

The test probes at the ends of the measurement cables should be short circuited before performing insulation resistance measurements with the selector switch in the  position, in order to make sure that a value close to 0  is displayed at the instrument. nection can be avoided and broken measurement cables can be detected.

In this way, incorrect con-

Insulation resistance may only be measured at voltagefree devices. The measurement cables may not come into contact with one another during high-resistance insulation measurements.

➭ Set the rotary switch to “ ➭ Connect the measurement cables to the accessible M and

 sockets, using the included probe for connection to the M socket if possible.

➭ Interference voltage measurement (V AC+DC TRMS) is con-

ducted in this switch position.

The START key may only be pressed when the device under test is voltage-free (display: Uext <10V).

The “

RISO

” or “ insulation resistance measurement and inter-turn short circuit detection. However, if interference voltage is inadvertently applied with the switch in this position, it appears at the display. If an interference voltage of Uext  15 V AC or > 25 V DC is present within the system, insulation resistance measurement is disabled. The display panel continues to show the interference voltage value. If a voltage of greater than 1000 V is present, an acoustic signal is generated as well.

RISO

” or “

COIL

”.

COIL

” switch position may only be used for

20 GMC-I Messtechnik GmbH

Caution: High-Voltage!

Note

Attention!

Note

Func

Zero:

RISO

COIL

RISO

Coil

DAR

The above symbol blinks when test voltage is connected.

–

0V!

Discharge

Do not touch the conductive ends of the test probes

instrument has been activated for the measurement of insulation resistance. You may otherwise be exposed to a current of 2.5 mA (limited in the measuring instrument), and although this is not life endangering, the resulting electrical shock is quite discernible. If, on the other hand, measurement is being performed on a capacitive device under test, for example a cable, it may be charged with up to approximately 1200 V. Touching the

device under test after measurement has been performed is life endangering in this case!

Selecting the Test Voltage (U

➭ Select the desired test voltage U

➭ It may be necessary to enter a password in order to change

test voltage (see section 6.1).

The selected test voltage appears at the display during testing.

= 50 ... 1000 V)

set

with the ▲▼ scroll keys.

set

when the

6.2.2 Performing Insulation Measurement

➭ When the device under test is voltage-free, activate the mea-

surement by pressing, or by pressing and holding, the Start softkey on the instrument or on the probe. Go to “Menu > Setup for currently selected measurement > Press and hold start key” and select either “Yes” or “No” in order to specify whether measurement is started by pressing, or by pressing and holding the Start key.

➭ Don’t read the measurement results until the display has set-

tled in. The high-voltage symbol next to the battery level dis-

play blinks during measurement. Auto-ranging is active during insulation resistance measurement. A DATA function which is matched specifically to the insulation

measurement can be activated for automatic retention of valid measured values (see section 5.2.1).

Automatic Detection of Interference Voltage During Insulation Measurement

If the instrument detects interference voltage of greater than

 U

15 V AC or > 25 V DC (condition: U 100 V, see page 51, footnote 1), the instrument is switched automatically to voltage measurement and the currently measured voltage value is displayed as Uext.

A dead zone results in erroneous measurements for automatic interference voltage detection during insulation measurement. The dead zone lies within a range of 80% to 120% of the selected test voltage (in the case of an interference voltage whose value is equal to that of measuring voltage, the two voltages neutralize each other).

ext

, e.g. Riq < 100 k at

INS

Manual switching to insulation resistance measurement is disabled for as long as voltage is applied to the test terminals.

If interference voltage is no longer present, insulation measurement can be started by pressing the Start softkey once again.

If “Error” appears at the display, the cable (the device under test) is most likely capacitively charged to a significant extent. Remedy: Short circuit the cable (the device under test). Repeat the measurement.

6.2.3 Ending the Measurement and Discharging

➭ Press the Start softkey in order to end the measurement. A warning is displayed during the discharging

procedure which isn’t cleared from the display until applied voltage Uext = 0000 V.

The instrument’s internal 1 M resistor causes rapid discharging. Contact between the object and the instrument must not be interrupted. Do

not disconnect the object until voltage has fallen below 25 V and the warning has been cleared from the display!

GMC-I Messtechnik GmbH 21

Voltage measurement in the RISO or COIL switch position is used primarily for interference voltage detection before the respective measurement. Use the V , V or V switch position in order to perform precise voltage measurements.

6.3 Inter-Turn Short Circuit Measurement –

Note

0V!

COIL

TEST ADAPTER

Connect COIL TEST ADAPTER

and

measurement cables

UISO

1200 V!

RISO

COIL

Power pulse

currents

up to 600 A

possible!

S– A

V

Tem p

m/4

COIL

S+

Example with Star

Connection

Example with

Delta Connection

MENUOKOK

ESC

MENUOKOK

ESC

Func

Zero:

RISO

COIL

RISO

Coil

DAR

The above symbol blinks when test voltage is connected.

Func

COIL

Function

In combination with the METRAHIT IM XTRA, the COIL TEST ADAPTER (COIL Adapter 50mH) and the COIL ADAPTER XTRA make it possible to measure inter-turn short circuiting. The adapters are universally suitable for numerous electric motors with various power ratings.

6.3.1 Inter-Turn ShortCircuit Measurement with the COIL TEST ADAPTER

In combination with the optional COIL TEST ADAPTER, inter-turn short circuit measurements with a test voltage of 1000 V are possible within an inductance range of 10 μH to 50 mH at 100 Hz. This range corresponds to motors in accordance with DIN standards with power ratings of roughly 15 kVA to 80 MVA.

A time value which is dependent on the inductance of the respective coil is ascertained during this measurement with high-voltage for each motor coil or coil combination, one after the other. A comparison of the time values makes it possible to examine the motor coils for symmetry, and thus to detect a short-circuited coil.

6.3.1.1 Preparing for Measurement

> Momentary Measurement Setup > Parameter  

Polarity

 Bipolar / Unipolar

3 x > Measurement View

Inter-turn short circuit measurements may only be con-

➭ Set the rotary switch to “

ducted on voltage-free coils.

➭ Repeatedly press the Func softkey until the measurement view

for COIL appears at the display.

➭ Select the motor or coil type to be tested under the measure-

ment type parameter in “Setup for currently selected measurement” (see below).

Selecting the Type of Measurement

> Momentary Measurement Setup > Parameter  

Measurement Type

1-Ph. Motor: AC motor (L1) 3-Ph. Motor: 3-phase motor (U-V, U-W, V-W) Coil Motor with up to 15 coils (L1 - L15) ➭ Select polarity: unipolar or bipolar (see below).

Polarity Selection

22 GMC-I Messtechnik GmbH

RISO

” or “

COIL

”.

 Coil / 1-Ph. Motor / 3-Ph. Motor

3 x > Measurement View

Test voltage (U

= 1000 V)

set

Test voltage for the inter-turn short circuit measurement is permanently set to 1000 V and cannot be changed.

Connection and Contacting

➭ Make sure that the device under test is voltage-free.

Interference voltage cannot be detected in combination with the COIL TEST ADAPTER (COIL ADAPTER 50 mH).

➭ Connect the

of its connector cable to the two accessible sockets at the multimeter: i.e. the red cable to the COIL socket and the black cable to the  socket.

➭ Connect the two measurement cables to the sockets at the

COIL TEST ADAPTER

via the contact protected plug

(identified with motor symbol).

➭ If possible, contact the inductive device under test with op-

Caution: High-Voltage!

Attention!

Graphic Representation List View

tional alligator clips plugged onto the test probes. In the case of 3-phase motors, for example, contact coil terminals U–V, V–W and U–W or L1, L2 and L3, one after the other.

Do not touch the conductive ends of the test probes as long as measurement is active and the Stop softkey is displayed. A voltage of up to 1200 V is present at the multimeter’s two enabled output sockets, and as a pulsed voltage at the two output sockets of the

COIL TEST ADAPTER

(identified with motor symbol). Multimeter: You may otherwise be exposed to a current of

2.5 mA (limited in the measuring instrument), and although this is not life endangering, the resulting electrical shock is quite discernible.

COIL TEST ADAPTER

: Power pulse currents of up to 600 A can flow from the output sockets. The device under test can become charged: Wait until voltage at the device under test has been discharged after each measurement (message: “Discharge ...”). Touching the device under test may otherwise be life endangering!

In the case of inter-turn short circuit measurements at transformers, very dangerous high-voltage may occur at the output side depending on the transformation ratio.

Perform the measurement by using a self-retaining contacting method, for example with the help of alligator clips. Poor contact may result in sparking and if the contacting element slips off of the device under test, the inspector is exposed to life-threatening danger!

➭ Activating the Inter-Turn Short Circuit Measurement

Activate the measurement by pressing the Start softkey. The high-voltage symbol next to the battery level display blinks during measurement.

➭ Measurement is stable as soon as a bar graph appears along

with the associated time value specified in microseconds (μs) to the right of the bar graph and deviation to the previous measurement is displayed as a percentage for the respective coil L.

➭ Measurement is ended automatically. The measurement can

be interrupted by pressing the Stop softkey.*

➭ Before removing the contacting element, allow the coil to dis-

charge via the multimeter (see section 6.3.1.3).

➭ Measurement for motors with three or more coils: Connect the

next coil (e.g. V–W) and repeat the measurement procedure described above. The next coil is automatically incremented in the measurement display and activated.

Measured Value Displays

Graphic

Graphic representation is used as a standard feature for the measurement view. If the instrument is in the list view, you can switch to the graphic display by pressing the Graphic softkey.

Horizontal axis: Coil U-V, U-W or V-W Vertical axis: Time value in μs The currently measured time value for the coil selected with the scroll key is digitally displayed in microseconds to the right of the

bar graph. As of the second measurement, deviation from the smallest to the largest measured time value is additionally displayed as a percentage.

➭ You can delete each measurement in order to repeat it by se-

lecting the desired axis position for coil U-V, U-W or V-W with

 or  scroll key and pressing the Delete softkey.

the

List

You can switch to the list view anytime by pressing the List softkey. In this case, deviation from the previous time value, as well as date and time of the measurement, are listed along with the respective time values. The final comparison of all measurements appears in the table’s header expressed as percentage deviation.

➭ You can delete each measurement in order to repeat it by se-

lecting the desired table row for coil U-V, U-W or V-W with the

 or  scroll key and pressing the Delete softkey.

Automatic Evaluation of Measurement Results

Automatic evaluation of measurement results begins when the second measurement is started. The respective measurement view (graph or list view) shows maximum deviation to the previous measurement as a percentage. This permits direct comparison of the first and all subsequent measurements. Due to the fact that the third measurement is then compared with the results of both previous measurements, you automatically get a final comparison of the measurements.

The list view permits a final comparison of all measured motor coils (star or delta connection).

Permissible asymmetry depends on motor type: A motor with squirrel-cage rotor demonstrates only minimal asymmetry (typically 1%). If deviation is greater than 10%, the device under test is faulty (e.g. short-circuited coil).

If any of the time values is 0, there’s a short-circuit. If no discharging takes place, the measured coil is interrupted (display: OL).

In order to start a new measurement series, delete the recorded measurement for each coil as described under “Measured Value Displays” or reselect the Coil function with the Func softkey (or by turning the rotary switch).

In the case of permanent-field motors, inter-turn short circuit measurement is not dependent on rotor position. This also applies to squirrel cage motors with large inductances which result in more frequently occurring remanence. In this case, the bipolar setting must be selected for the inter-turn short circuit measurement. First of all, measurement must be performed at each coil with positive polarity. Afterwards, each coil is measured once again with reversed polarity. The connections between the coil adapter’s terminals and the motor coil are reversed to this end. The instrument generates a mean value based on both measurement results which, to a great extent, is independent of rotor position.

6.3.1.2 Conducting the Inter-Turn Short Circuit Measurement

➭ Contact the desired coil (e.g. U–V) in order to test for absence

of voltage.

GMC-I Messtechnik GmbH 23

As of firmware version 1.003.000 – in the case of older firmware versions, end measurement by pressing the Stop softkey.

In order to start a new measurement series, you can

–

0V!

Discharge

- Delete the respectively recorded measurement for each coil as described under “Measured Value Displays”, or

- Reselect the COIL measuring function with the help of the Func softkey (or by turning the rotary switch)

- Start a new measurement series by pressing the Restart softkey*

In the case of permanent-field motors, inter-turn short circuit measurement is dependent on rotor position. This also applies to squirrel cage motors with large inductances which result in more frequently occurring remanence. In this case, the bipolar setting must be selected for the inter-turn short circuit measurement. First of all, measurement must be performed at each coil with positive polarity. Afterwards, each coil is measured once again with reversed polarity. The connections between the COIL Adapter’s terminals and the motor coil are reversed to this end. The instrument generates a mean value based on both measurement results which, to a great extent, is independent of rotor position.

6.3.1.3 Ending the Measurement and Discharging

➭ Measurement is ended automatically. The measurement can

be aborted by pressing the Stop softkey.**

After ending the measurement, any remaining residual voltage (Uext) is displayed (message: “Discharge ...”), which may result from cable capacitance. The instrument’s internal 1 M resistor causes rapid discharging.

Contact to the motor coils must be retained to this end. Do not disconnect the object until voltage has fallen below 25 V, i.e. until the “Discharge ...” message disappears.

As of firmware version 1.003.000.

As of firmware version 1.003.000 – in the case of older firmware versions, end measurement by pressing the Stop softkey.

24 GMC-I Messtechnik GmbH

6.3.2

Note

0V !

COIL /

COIL ADAPTER XTRA

Connect

COIL ADAPTER XTRA

and measurement cables

UISO

max

1200 V !

Power pulse currents

RISO

COIL

High

Low

U-V

U-W

V-W V-U

W-U

W-V

up to 600 A possible!

UVW

S– A

V

Tem p

m/4

COIL

S+

Example with

Star Connection

Example with

Delta Connection

ESC

Func

Zero:

RISO

COIL

RISO

Coil

DAR

The above symbol blinks when test voltage is connected.

Func

Inter-Turn Short Circuit Measurement with COIL ADAPTER XTRA

In combination with the optional COIL ADAPTER XTRA, inter-turn short circuit measurements with a test voltage of 1000 V are possible within an inductance range of 10 μH to 5 H (100 Hz).

Switch set to High: 5 mH to 5 H

Low: 10 μH to 50 mH

This range corresponds to motors in accordance with DIN standards with power ratings of roughly 0.16 kVA to 80 MVA.

Switch set to High: from roughly 0.16 kVA to 160 kVA

Low: from roughly 15 kVA to 80 MVA

A time value which depends on the inductance of the respective coil is ascertained for each motor coil or coil combination, one after the other, during this measurement with high-voltage. A comparison of the time values makes it possible to check the motor coils for symmetry, and thus to detect an inter-turn short circuit.

6.3.2.1 Preparing for Measurement

Viewing the Automatically Selected Measurement Type and Polarity Mode

> Setup for currently selected measurement >

Parameters

Measurements type: 3-phase motor (U, V, W) Polarity mode:Bipolar

Press twice > Measurement view

➭ Set the rotary switch to “

➭ Repeatedly press the Func softkey until the measurement view

for COIL appears at the display.

➭ You can view the automatically selected measurement type

and polarity mode under “Setup for currently selected measurement”.

Ab Firmware 1.003.000.

Inter-turn short circuit measurements may only be conducted on voltage-free coils.

After connecting the COIL ADAPTER XTRA to the multimeter, manual selection of measurement type and polarity is unnecessary (see “Connection and Contacting” on page 26). Measurement type is automatically set to 3phase motor measurement and polarity is automatically set to bipolar after connection.

RINS

” or “

COIL

”.

Test Voltage (U

= 1000 V)

set

Test voltage for the inter-turn short circuit measurement is permanently set to 1000 V and cannot be changed.

GMC-I Messtechnik GmbH 25

Connection and Contacting

Note

Caution: High-Voltage!

Note

Attention!

Graphic Representation List View

➭ Make sure that the device under test is voltage-free.

In combination with the COIL ADAPTER XTRA, interference voltage can only be detected under certain conditions.

➭ Connect the

multimeter via the contact protected plug.

➭ Connect the three measurement cables to the sockets la-

beled U, V and W at the sure that the color coding included on the measurement cables and the sockets matches up.

➭ If possible, contact the inductive device under test with op-

tional alligator clips plugged onto the test probes. Simultaneously contact coil terminals U, V and W, or L1, L2 and L3.

2.5 mA (limited in the measuring instrument), and although this is not life endangering, the resulting electrical shock is quite discernible.

COIL ADAPTER XTRA

flow from the output sockets. The device under test can become charged: Wait until voltage at the device under test has been discharged after each measurement. The rotary switch may not be turned in order to start the next measurement until after the “Select next switch position at COIL Adapter” prompt appears, which is displayed subsequent to the “Discharging – please wait” message. Touching the device under test may otherwise be life endangering!

In the case of inter-turn short circuit measurements at transformers, very dangerous high-voltage may occur at the output side depending on the transformation ratio.

For safety reasons, all three motor terminals must always be connected to the adapter when measurements are conducted at 3-phase motors. Dangerous voltage may be present at unconnected motor terminals.

COIL ADAPTER XTRA

: Power pulse currents of up to 600 A can

to the S+ and  sockets at the

COIL ADAPTER XTRA

. In doing so, make

(identified with U, V, W).

est to the largest measured time value is additionally displayed as a percentage.

➭ Each individual measurement (bar) can be deleted from the

graphic in order to repeat it by first of all selecting the desired coil (U-V, U-W, V-W, V-U etc.) with the adapter’s rotary switch, and then pressing the Delete softkey.

List

You can switch to the list view at any time by pressing the List softkey. In this case, deviation from the previous time values, as well as date and time of the measurement, are listed along with the respective time values. The final comparison of all measurements appears in the table’s header.

The first line (no. 1) shows the target values for coil U-V/V-U, the second line (no. 2) for coil U-W/W-U and the third line (no. 3) for coil V-W/W-V.

➭ You can delete the respective measured value pair (for positive

and negative polarity) from the list in order to repeat the measurement by first of all selecting the corresponding coil, namely U-V and V-W, U-W and W-U or V-W and W-V, and then pressing the Delete softkey.

6.3.2.2 Conducting the Inter-Turn Short Circuit Measurement

➭ Select the desired inductance range (High or Low) with the

help of the rocker switch on the adapter (see “Selecting the Inductance Range” on page 26).

➭ Set the adapter’s rotary switch to the desired coil. For exam-

ple, start with the first switch setting: U-V.

➭ Contact winding terminals U, V and W or L1, L2 and L3.

Perform measurement with self-retaining contacting devices, for example alligator clips. Poor contact may result in sparking and if the contacting element slips off of the device under test, the inspector is exposed to life-threatening danger!

Selecting the Inductance Range

The High or Low inductance range is selected with the rocker switch at the COIL ADAPTER XTRA: High: 5 mH to 5 H (0.16 kVA to 160 kVA) Low: 10 μH to 50 mH (15 kVA to 80 MVA)

Measured Value Display

Graphic

Graphic representation is used as a standard feature for the measurement view. If the instrument is in the list view, you can switch to the graphic display by pressing the Graphic softkey.

Horizontal axis: Coil U-V, U-W, V-W Vertical axis: Time value in μs The currently measured time value for the coil selected at the multimeter is digitally displayed in microseconds to the right of the bar

graph. As of the second measurement, deviation from the small-

26 GMC-I Messtechnik GmbH

➭ Activate the inter-turn short circuit measurement:

Attention!

–

0V !

Discharge

Activate the measurement by pressing the Start softkey. The high-voltage symbol next to the battery level display blinks during measurement.

➭ Measurement is stable as soon as a bar graph appears

in the graphic representation along with the associated time value specified in microseconds to the right of the bar graph and deviation to the previous measurement is displayed as a percentage, or the time value and the deviations to the previous measurements are indicated in the respective line in the list view: U-V, U-W, V-W: green bar in graphic view

time value for +COIL in list view

V-U, W-U, W-V: orange bar in graphic view

time value for -COIL in list view

➭ After measurement has been completed, wait until voltage at

the device under test has been discharged. The next measurement may not be started until after the “Select next switch position at COIL Adapter” prompt appears, which is displayed subsequent to the “Discharging – please wait” message.

Turning the rotary switch or throwing the rocker switch during a running measurement can damage or destroy the COIL ADAPTER XTRA.

6.3.2.3 Starting a New Measurement Series / Measuring Routine

In order to start a new measurement series, you can

- Delete the respectively recorded measurement for each coil as described under “Measured Value Displays”, or

- Reselect the COIL measuring function with the help of the Func softkey (or by turning the rotary switch)

- Start a new measurement series by pressing the Restart softkey

6.3.2.4 Stopping/Ending Measurement and Discharging

You can stop an active measurement (of a coil) at any time, as long as the measurement results have not yet been displayed.

➭ Press the Stop softkey.

After measurement has been ended, any remaining residual voltage (Uext) is displayed (message: “Discharging – please wait”), which may result from cable capacitance. The instrument’s internal 1M resistor causes rapid discharging.

Contact to the motor coils must be retained to this end. Do not disconnect the object until voltage has fallen below 25 V, i.e. until after the “Discharging – please wait” message has been cleared from the display.

➭ Press the Start softkey in order to restart the measurement.

➭ Repeat the above described measuring procedure by setting

the rotary switch to the corresponding position.

➭ The multimeter detects the selected position and automati-

cally performs the measurement. If measurement is stable, the next measurement results are displayed.

➭ Complete the procedure by conducting measurements, one

after the other, for all of the coils or rotary switch positions as described above.

Automatic Evaluation of Measurement Results

Automatic evaluation of measurement results begins when the second measurement is started. The respective measurement view (graphic or list view) shows maximum deviation from the previous measurement as a percentage. This permits direct comparison of the first and all subsequent measurements. Due to the fact that the third measurement is then compared with the results of both previous measurements, you automatically get a final comparison of all three measurements.

The list view permits a final comparison of all measured motor coils (star or delta connection).

If any of the time values is 0, there’s a short-circuit. If no discharging takes place, the measured coil is interrupted (display: OL).

In the case of permanent-field motors, inter-turn short circuit measurement is dependent on rotor position. This also applies to squirrel cage motors with large inductances which result in more frequently occurring remanence. First of all, measurement must be performed at each coil with positive polarity (U-V, U-W, V-W). Afterwards, each coil is measured once again with reversed polarity (V-U, W-U, W-V). The rotary switch on the COIL ADAPTER XTRA must be set to the respective position to this end. As a result, there’s no need to reconnect the terminals at the COIL Adapter to the motor coil. The instrument generates a mean value based on both measurement results which, to a great extent, is independent of rotor position.

6.3.2.5 Interrupting the Measurement Series / Measuring Routine

➭ The measurement series can be interrupted by setting the ro-

tary switch to the “0” position.

➭ In order to resume the measurement series, set the rotary

switch to the desired coil (e.g. V-W) and press the Start softkey once again.

6.3.2.6 Saving the Measurement Series

The values obtained during the measurement series can be saved to the instrument’s internal memory by pressing the STORE key after the measurement series has been completed.

GMC-I Messtechnik GmbH 27

6.4 Absorption Index Measurement – DAR

–

0V!

Discharge

Func

Zero:

RISO

COIL

RISO

Coil

DAR

The above symbol blinks when test voltage is connected.

Func

The absorption index test is part of the polarization index test (PI). Insulation resistance measurements are placed in relationship to one another after 30 and 60 seconds.

Application: faster version of the polarization index test.

RISO

➭ Set the rotary switch to “

➭ Repeatedly press the Func softkey until the measurement view

for DAR appears at the display.

➭ Contact the device under test with alligator clips which have

been plugged onto the test probes.

➭ Interference voltage measurement (V AC+DC TRMS) is con-

ducted in this switch position.

➭ Measurement may only be started when the device under test

is voltage-free (U

= 0000 V).

ext

➭ Activate the measurement by pressing the Start softkey. The

high-voltage symbol next to the battery level display blinks during measurement.

➭ You can interrupt the measurement at any time by pressing the

Stop softkey.

The measurement is recorded and you can observe its progress which is displayed as a curve over the time axis.

The result for R

is displayed after reaching the 30 s mark. Mea-

surement is stopped automatically and results for R60 and DAR are displayed after reaching the 60 s mark.

”.

The following measured values are displayed digitally next to the graphic representation:

DAR Absorption index after 60 s RISO Momentary measured value in M/G U

ext

set

act

After measurement has been completed, any remaining residual voltage U

Momentary measuring voltage (actual value)

Test voltage (target value) Measured time since beginning of mea-

surement Measured value after 30 s in M/G Measured value after 60 s in M/G

is displayed which

ext

may result from cable capacitance and a capacitive device under test. The instrument’s internal 1M resistor causes rapid discharging.

Contact to the insulation resistance must be retained to this end.

28 GMC-I Messtechnik GmbH

6.5 Polarization Index Measurement – PI

–

0V!

Discharge

Func

Zero:

RISO

COIL

RISO

Coil

DAR

The above symbol blinks when test voltage is connected.

Func

Polarization index testing is recommended for electric machines. This procedure involves expanded testing of insulation resistance. DC measuring voltage from the multimeter is applied to the insulation for a duration of 10 minutes. Measured values are documented after one minute, and after ten minutes. If the insulation is good, the value measured after ten minutes is higher than the value measured after one minute. The relationship between the two measurement values is the polarization index. Charged material within the insulation is aligned due to the application of measuring voltage over a long period of time, resulting in polarization. The polarization index indicates whether or not the charged material contained in the insulation can still be moved, i.e. whether or not polarization is possible at all. This, in turn, is an indication of the condition of the insulation.

The following rules apply in general:

PI values < 1: Troubleshooting is required. PI values = 1  2 Maintenance is recommended PI values = 2  4 DUT is OK,

no immediate action is required Preventive maintenance can be planned according to workload.

PI values > 4 DUT in flawless condition

Applications: Determination of moisture and contamination levels

After measurement has been completed, any remaining residual voltage U

is displayed which

ext

may result from cable capacitance and a capacitive device under test. The instrument’s internal 1M resistor causes rapid discharging.

Contact to the insulation resistance must be retained to this end.

The following applies to the insulation of electric drive units:

Intact insulation PI  2 Very good insulation PI > 4

➭ Set the rotary switch to “

➭ Repeatedly press the Func softkey until the measurement view

for PI appears at the display.

➭ Contact the device under test with alligator clips which have

been plugged onto the test probes.

➭ Interference voltage measurement (V AC+DC TRMS) is con-

ducted in this switch position.

➭ Measurement may only be started when the device under test

is voltage-free (U

➭ Activate the measurement by pressing the Start softkey. The

high-voltage symbol next to the battery level display blinks during measurement.

➭ You can interrupt the measurement at any time by pressing

the Stop softkey.

The measurement is recorded and you can observe its progress which is displayed as a curve over the time axis.

The result for R surement is stopped automatically and results for R are displayed after reaching the 600 s mark.

RISO

”.

= 0000 V).

ext

is displayed after reaching the 60 s mark. Mea-

and DAR

600

The following measured values are displayed digitally next to the graphic representation:

PI Polarization index after 600 s Rins Momentary measured value in M/G U

ext

set

act

600

GMC-I Messtechnik GmbH 29

Momentary measuring voltage (actual value)

Test voltage (target value) Measured time since beginning of mea-

surement Measured value after 60 s in M/G Measured value after 600 s in M/G

6.6 Voltage Measurement

Note

Notes Regarding Voltage Measurement

• The multimeter may only be operated with installed rechargeable

batteries or mains module. Dangerous voltages are otherwise not indicated, and the instrument may be damaged.

• The multimeter may only be operated by persons who are capable of recognizing touch hazards and taking the appropriate safety precautions. Contact hazards exist anywhere, where voltages of greater than 33 V (RMS) may occur. The test probes may only be gripped up to the finger guard. Do not touch the metallic test probes under any circumstances.

• Avoid working alone when taking measurements which involve touch hazards. Be certain that a second person is present.

• Maximum permissible voltage between the V and  (ground) terminals is 1000 V for measuring category III and 600 V for measuring category IV.

• Be prepared for the occurrence of unexpected voltages at devices under test (e.g. defective devices). For example, capacitors may be dangerously charged.

• No measurements may be made with this instrument in electrical circuits with corona discharge (high-voltage).

• Special care is required when measurements are made in HF electrical circuits. Dangerous pulsating voltages may be present.

• Be aware of the fact that dangerous voltage spikes are not displayed

during measurement with the low-pass filter. We recommend measuring voltage without the low-pass filter first, in order to be able to detect any dangerous voltages.

• Be absolutely certain that the measuring ranges are not overloaded beyond their allowable capacities. Limit values are included in section 8, “Characteristic Values” in the table entitled “Measuring Functions and Measuring Ranges” in the “Overload Capacity” column.

Rotary selector switch position “RISO” is available for the detection of interference voltage during insulation resistance measurement. Use switch position V , V or V in order to perform precise voltage measurements.

30 GMC-I Messtechnik GmbH

6.6.1 Alternating Voltage and Frequency Measurement V AC and

Note

Attention!

Note

V: 300 mV/3 V/30 V

Measuring ranges:

300 V/1000 V

Func

Max. 1000 V 3 kHz

Hz: 1Hz  300 kHz

max

= 3 x 106 V x Hz

Func

Hz: 300 Hz/3 kHz/

Hz: 30 kHz/300 kHz

VAC

Duty AC

RPM AC

VAC Fil

Func

V~ & Filter

Zero

S– A

V

Tem p

m/4

COIL

S+

Hz with Selectable Low-Pass Filter

➭ In accordance with the voltage or frequency to be measured,

turn the rotary switch to V~ or Hz.

➭ Press the MENU key.

➭ Press the “Setup for currently selected measurement” softkey.

➭ Make sure that the Clip parameter is set to Off. Otherwise all

measured values are displayed in amperes, corrected by the amount resulting from the selected transformation ratio for an interconnected current clamp sensor.

➭ The display is returned to the measurement view by pressing

the ESC key twice.

➭ Repeatedly press the Func softkey until the desired measuring

function is displayed.

➭ Connect the measurement cables as shown.

The “” connector jack should be grounded.

V AC – Voltage Measurement

Make sure that a current measuring range (“A”) has not been activated, when the multimeter is connected for voltage measurement! If the fuse’s blowing limits are exceeded as a result of operator error, both the operator and the instrument are in danger!

➭ You can switch back and forth between voltage measurement

with and without low-pass filter.

➭ Repeatedly press the Func softkey until the unit of measure

VAC or VAC Fil appears at the display.

➭ If necessary, conduct zero balancing by pressing the Zero key

(see section 6.6.4 for description).

Hz – Frequency Measurement

➭ Connect the measured quantity in the same way as for volt-

age measurement.

➭ Manually select the measuring range for the voltage ampli-

tude. When the instrument is switched to frequency measurement, the previously selected voltage measuring range remains active.

➭ Repeatedly press the Func softkey until the unit of measure Hz

appears at the display. Lowest measurable frequencies and maximum allowable voltages are listed in section 8, “Characteristic Values”.

An intermittent acoustic signal warns the operator if the measured value exceeds the upper range limit in the 1000 V range.

VAC Fil – Voltage Measurement with Low-Pass Filter

A 1 kHz/-3dB low-pass filter can be activated if required, in order to filter out capacitively induced high frequency pulses of greater than 1 kHz, for example when performing measurements at cables, i.e. undesired voltages of greater than 1 kHz can be suppressed.

Fil appears at the display in order to indicated the activated lowpass filter. The multimeter is automatically switched to manual measuring range selection.

Specified measuring accuracy is not reached with signals of greater than 500 Hz when the filter is active.

GMC-I Messtechnik GmbH 31

Be aware of the fact that dangerous voltage spikes are not displayed during this type of measurement (see also “Voltage Comparator”). We recommend measuring voltage without the low-pass filter first, in order to be able to detect any dangerous voltages.

Voltage Comparator for Displaying Dangerous Voltage

The input signal or measuring signal is checked by a voltage comparator for dangerous spikes, because these do not appear at the display when the low-pass filter is used. At voltages of greater than 15 V AC or 25 V DC, a danger symbol appears at the display:

The “Setup for currently selected measurement” submenu cannot be accessed for the above described measurements because no further settings are provided for.

6.6.2 Duty Cycle Measurement – Duty AC

Note

Duty cycle (%) =

Pulse duration (t

)

Pulse period (t

)

 100

RPM

Revolutions

min

---------------------------

Pulses

Revolution

-------------------------







60s

--------

Measuring ranges:

Max. 1000 V 3 kHz

Hz:

1Hz  300 kHz

max

= 3 x 106 V x Hz

Duty AC: 5.0 ... 98.0%

RPM: 30 ... 30,000

Pulse Time Quantities

pulse frequency = 1/tP

pulse duration

pulse period

– tEinterpulse period

E/tP

pulse or duty cycle

Duty AC measuring ranges:

MR Hz tE/t

15 Hz ... 1 kHz 10 ... 90%

1 kHz ... 4 kHz 10 ... 90%

30 V

15 Hz ... 1 kHz 5 ... 95%

1 kHz ... 4 kHz 10 ... 90%

Measuring ranges:

Max. 1000 V 3 kHz

Hz:

1Hz  300 kHz

max

= 3 x 106 V x Hz

Func

VAC

Duty AC

RPM AC

VAC Fil

Func

V/~

I(A)

S– A

V

Tem p

m/4

COIL

S+

S– A

V

Tem p

m/4

COIL

S+

The pulse-period ratio can be ascertained for square-wave signals with the duty cycle measurement.

➭ Set the rotary switch to V~.

➭ Repeatedly press the Func softkey until Duty AC appears at the

display.

➭ Connect the measurement cables as you would for a voltage

measurement.

Make sure that a current measuring range (“A”) has not been activated, when the multimeter is connected for frequency or duty cycle measurement!

The ratio of pulse duration to pulse period is measured with periodic square-wave signals and is displayed as a percentage.

6.6.3 RPM Measurement – RPM AC

The applied frequency must remain constant during duty cycle measurement.

Revolutions per minute at 2 and 4-stroke internal combustion engines (also known as rotational frequency) are measured by acquiring pulses. The number of measurable pulses per revolution varies depending upon engine type (2 or 4 stroke). for this measurement, the number of measurable pulses per

As a prerequisite

must first be set in the RPM settings menu (RPM  0FF) below).

➭ Set the rotary switch to V~.

➭ Repeatedly press the Func softkey until RPM AC appears at the

display.

➭ Select the desired motor 2-S or 4-S via the scroll keys ▲▼.

➭ Connect the measurement cables as you would for a voltage

measurement. In the case of internal combustion engines, ignition pulses can be acquired alternatively with a current sensor (see wiring diagram).

➭ The measured value then appears in RPM, for example

“244.3 r”.

revolution

(see

Measured RPM value revolutions per minute RPM parameter pulses per revolution

Pulses per Revolution Settings Menu

2-S RPM measurement at 2-stroke engines:

4-S RPM measurement at 4-stroke engines:

1 pulse per revolution) or

1 pulse per 2 revolutions)

Voltage Comparator for Displaying Dangerous Voltage

32 GMC-I Messtechnik GmbH

6.6.4 Direct and Pulsating Voltage Measurement, V DC and

Note

Attention!

300 mV/3 V/30 V

Measuring ranges:

– (+)

+ (–)

300 V/1000 V

Func

Max. 1000 V 3 kHz

max

= 3 x 106 V x Hz

VDC

VAC/DC

V (AC+DC) Fil

Zero

S– A

V

Tem p

m/4

COIL

S+

V(AC+DC)

➭ Set the rotary switch to V or V .

➭ Press the MENU key.

➭ Press the “Setup for currently selected measurement” softkey.

➭ Make sure that the Clip parameter is set to Off. Otherwise all

measured values are displayed in amperes, corrected by the amount resulting from the selected transformation ratio for an interconnected current clamp sensor.

➭ The display is returned to the measurement view by pressing

the ESC key twice.

➭ Repeatedly press the Func softkey until the desired measuring

function is displayed.

➭ If necessary, conduct zero balancing by pressing the Zero key

(see description below).

➭ Connect the measurement cables as shown.

The “” connector jack should be grounded.

➭ Measurement is started immediately.

V (AC+DC) measurement: Due to system design, the DC component displayed in the smallest measuring range (300 mV) has an offset. Select the VDC function for precise measurement of the DC component.

As soon a the Man / Auto key is pressed, and assuming the measured value is less than 280 mV, the multimeter is switched to the mV measuring range.

V (AC+DC) Fil – Measurement with Low-Pass filter

Fil appears at the display in order to indicate the respectively activated low-pass filter. The multimeter is automatically switched to manual measuring range selection.

Specified measuring accuracy is not reached with signals of greater than 500 Hz when the filter is active.

An intermittent acoustic signal warns the operator if the measured value exceeds the upper range limit in the 1000 V range.

Voltage Comparator for Displaying Dangerous Voltage

Improving Accuracy by means of Zero Balancing – Zero

The currently measured voltage value can be subtracted from future measurements in all voltage measuring ranges.

➭ Press the Zero softkey.

➭ The value ascertained for Zero is saved and appears above the

measurement display. Automatic compensation is implemented for future measurements. This value remains in memory even after the instrument has been switched off.

➭ The value for Zero is retained when the instrument is switched

to a different measuring function. The correction or offset value is deleted by pressing Zero once again, or when the instrument is switched off. The value is cleared from the display.

GMC-I Messtechnik GmbH 33

6.7 Resistance Measurement “”

Note

Func



Tem p

Func



Temp . R T D

TEMP TC

300 /3 k/30 k

Measuring ranges:

300 k/3 M/30 M

0V!

Zero

S– A

V

Tem p

m/4

COIL

S+

➭ Disconnect supply power from the electrical circuit of the de-

vice to be measured, and discharge all high-voltage capacitors.

➭ Make sure that the device under test is voltage-free. Interfer-

ence voltages distort measurement results! Refer to section 6.6.4 regarding testing for the absence of voltage with the help of the direct voltage measurement.

➭ Set the rotary switch to “”. ➭ Repeatedly press the Func softkey until the “” measuring

function is displayed.

➭ If necessary, conduct zero balancing by pressing the Zero key

(see description below).

➭ Connect the device under test as shown.

➭ Measurement is started immediately.

Use short or shielded measurement cables in the case of high-impedance resistance.

Improving Accuracy by means of Zero Balancing – Zero

Cable resistance and contact resistance can be eliminated in all measuring ranges by means of zero balancing.

➭ Short circuit the measurement cables to this end.

➭ Press the Zero softkey.

➭ Insofar as the value for Zero is less than a permissible threshold

of 0 to 50% of the measuring range, the Zero softkey is no lon- ger grayed out in the display and the Zero function can be activated by pressing the Zero key.

➭ The value ascertained for Zero is saved and appears above the

measurement display. Automatic compensation of cable resistance is activated for all subsequent measurements.

➭ The value for Zero is retained when the instrument is switched

to a different measuring function. The correction or offset value is deleted by pressing Zero once again, or when the instrument is switched off. The value is cleared from the display.

The “Setup for currently selected measurement” submenu cannot be accessed for the resistance measurement because no further settings are provided for.

34 GMC-I Messtechnik GmbH

6.8 Capacitance Measurement F

Note

0V!

–



Tem p

30 nF/300 nF/

Measuring ranges:

+ –

3 μF30 μF/300 μF

Func



Temp . R T D

TEMP TC

Zero

S– A

V

Tem p

m/4

COIL

S+

S– A

V

Tem p

m/4

COIL

S+

➭ Disconnect supply power from the electrical circuit of the de-

vice to be measured, and discharge all high-voltage capacitors.

➭ Make sure that the device under test is voltage-free.

Capacitors must always be discharged before measurement is performed. Interference voltages distort measurement results! Refer to section 6.6.4 regarding testing for the absence of voltage with the help of the direct voltage measurement.

➭ Set the rotary switch to “” or . ➭ Repeatedly press the Func softkey until the F measuring

function is displayed.

➭ If necessary, conduct zero balancing by pressing the Zero key

(see description below).

➭ Connect the (discharged!) device under test to the sockets

with the measurement cables as shown.

➭ Measurement is started immediately.

Improving Accuracy by means of Zero Balancing – Zero

Cable capacitance and junction capacitance can be eliminated in all measuring ranges by means of zero balancing.

➭ Open the connected measurement cables to this end.

➭ Press the Zero softkey.

➭ Insofar as the value for Zero is less than a permissible threshold

of 0 to 50% of the measuring range, the Zero softkey is no lon- ger grayed out in the display and the Zero function can be activated by pressing the Zero key.

➭ The value ascertained for Zero is saved and appears above the

measurement display. Automatic compensation of cable capacitance is activated for all subsequent measurements. This value remains in memory even after the instrument has been switched off.

➭ The value for Zero is retained when the instrument is switched

to a different measuring function. The correction or offset value is deleted by pressing Zero once again, or when the instrument is switched off. The value is cleared from the display.

The “–” pole of polarized capacitors must be connected to the “” jack. Resistors and semiconductor paths connected in parallel to the capacitor distort measurement results!

The “Setup for currently selected measurement” submenu cannot be accessed for the capacitance measurement because no further settings are provided for.

GMC-I Messtechnik GmbH 35

6.9

MENUOKOK



Tem p

Measuring Ranges

RTD

Pt100 –200.0  + 850.0 C

RTD

Pt1000 –150.0  + 850.0 C

RTD

Func



Temp . R T D

TEMP TC

RLeads

S– A

V

Tem p

m/4

COIL

S+

Temperature Measurement with Resistance Thermometer – Temp RTD

Temperature measurement is performed with a Pt100 or Pt1000 resistance thermometer (accessory, not included), which is connected to the voltage input.

➭ Set the rotary switch to “” or “Temp”.

➭ Repeatedly press the Func softkey until the Temp RTD measur-

ing function is displayed.

➭ Select the connected temperature sensor (see settings menu

below).

➭ Ascertain offset resistance by pressing the R Leads softkey or,

if the value is known, enter it to the “Setup for currently selected measurement” submenu (see below). The currently selected value for R Leads appears above the measurement display.

➭ Connect the sensor to the sockets with the measurement ca-

bles as shown.

➭ Measurement is started immediately. The instrument displays

the measured temperature using the selected unit of measure.

Temperature Sensor Selection

Setup for currently selected measurement

Setup)

(Temp

RTD

 

Temperature sensor PT100 / PT1000



Selecting the Unit of Measure for Temperature

> Setup for currently selected measurement

(Temp

 

(°C = default setting)

Entering R Leads Offset Resistance

> Setup for currently selected measurement

(Temp

  R Leads 00.xx  

➭ Enter the known resistance of the connector cables with the

scroll keys: Select the digit to be changed with the the respectively selected digit with the value is 0.43 . Values can be selected within a range of 0 to 50 .

Setup)

RTD

Temperature U/M

Setup)

RTD

°C / °F



 keys, and change

keys. The default

Ascertaining Cable Resistance – R Leads

➭ Press the RLeads softkey. The “Short circuit cable!” message

appears.

➭ Short circuit the connected measurement cables.

➭ Store the measured offset resistance value by pressing the

Save softkey. The ascertained value for R Leads appears above the measurement display. Automatic compensation of cable resistance is activated for all subsequent measurements. Cable resistance remains in memory even after the instrument has been switched off.

36 GMC-I Messtechnik GmbH

6.10 Temperature Measurement with Thermocouple – Temp

Note

MENUOKOK



Tem p

Measuring Range

K (NiCr-Ni)

–250.0  +1372.0 C

Func



Temp. RTD

TEMP TC

S– A

V

Tem p

m/4

COIL

S+

Temperature measurement is performed with a type K thermocouple (accessory, not included), which is connected to the voltage input.

➭ Set the rotary switch to “” or “Temp”.

➭ Repeatedly press the Func softkey until the Te mp T C measuring

function is displayed.

The reference temperature is measured via an internal reference junction. It’s displayed as T

INT, or it can be queried via “General

Setup” (see description below). The “Setup for currently selected measurement” menu can be

used to specify whether or not the internal reference junction temperature or a manually entered temperature will be used (see below). If “Manual” temperature is selected, T

MAN appears that

the display.

➭ Connect the sensor to the sockets with the measurement ca-

bles as shown.

➭ Measurement is started immediately. The instrument displays

the measured temperature using the selected unit of measure.

Querying the Measured Reference Temperature

> General Setup > Info > Temperature xx.x °C

The internal reference temperature (temperature of the internal reference junction) is measured by a temperature sensor inside the instrument. This may be somewhat higher or lower than room temperature as a result of internal heat-up, or moving from warmer to colder surroundings or vice versa.

Selecting the Unit of Measure for Temperature

> Setup for currently selected measurement

(Temp TC Setup)

 

Temperature U/M

(°C = default setting)

Entering “Manual” Reference Temperature Tman

> Setup for currently selected measurement

(Temp

  Tman +xx.x °C  

Setup)

°C / °F





Choice Between Measured and “Manual” Reference Temperature

Man Manually specified reference temperature Int Internally measured reference temperature

GMC-I Messtechnik GmbH 37

> Setup for currently selected measurement

(Temp

  Compensation Type Man / Int 

Setup)

6.11 Continuity Test

Note

0V!

300 

Measuring Range

(0.1  ... 310 )

R < 1, 10, 20, 30, 40, 50, 60, 70, 80, 90 

Func

S– A

V

Tem p

m/4

COIL

S+

Func

Forward Direction

Reverse Direction

0V!

up to 5.100 V

Measuring Range:

+ –

S– A

V

Tem p

m/4

COIL

S+

➭ Disconnect supply power from the electrical circuit of the de-

vice to be measured, and discharge all high-voltage capacitors.

➭ Make sure that the device under test is voltage-free. Interfer-

ence voltages distort measurement results!

➭ Set the rotary switch to “ ”.

A loudspeaker symbol appears at the display.

➭ Select the desired threshold with the ▲▼ scroll keys (see de-

scription below).

➭ Connect the conductor path under test as shown.

➭ Measurement is started immediately.

Adjusting the Threshold

Depending upon the selected threshold, the multimeter generates a continuous acoustic signal in the case of continuity or short-circuiting, i.e. at a value of less than the selected threshold.

“OL” appears at the display in the case of an open connection. The threshold is adjusted with the ▲▼scroll keys.

6.12 Diode Testing with Constant Current of 1 mA

➭ Disconnect supply power from the electrical circuit of the de-

vice to be measured, and discharge all high-voltage capacitors.

➭ Make sure that the device under test is voltage-free. Interfer-

ence voltages distort measurement results! Refer to section 6.6.4 regarding testing for the absence of voltage with the help of the direct voltage measurement.

➭ Set the rotary switch to “ ”.

➭ Press the Func key.

The diode symbol appears at the display.

➭ Connect the device under test as shown.

➭ Measurement is started immediately.

Forward Direction and Short-Circuit

The instrument displays forward voltage in volts (display: 4 places). As long as voltage drop does not exceed the maximum display value of 5.1 V, several series connected components or reference diodes with small reference voltages, as well as Zener diodes and LEDs, can be tested.

Reverse Direction and Interruption

The measuring instrument indicates overflow “OL”.

Resistors and semiconductor paths connected in parallel to the diode distort measurement results!

The “Setup for currently selected measurement” submenu cannot be accessed for the continuity test or the diode test.

38 GMC-I Messtechnik GmbH

6.13 Milliohm Measurement – Rlo (2-wire measurement)

Note

+ –

0V!

Rlo

Short circuit measuring cable ends

Start

3 /30 

Measuring ranges:



/+/– 20 mA

Test current:

/+/– 200 mA

Zero

Stop

S– A

V

Tem p

m/4

COIL

S+

S– A

V

Tem p

m/4

COIL

S+

➭ Disconnect supply power from the electrical circuit of the de-

vice to be measured, and discharge all high-voltage capacitors.

➭ Make sure that the device under test is voltage-free. Interfer-

ence voltages distort measurement results! Refer to section 6.6.4 regarding testing for the absence of voltage with the help of the direct voltage measurement.

➭ Set the rotary switch to Rlo.

➭ Select desired test current Ip set with the ▲▼ scroll keys.

➭ Select desired test current Ip set polarity:

/+/–

➭ Connect the device under test as shown.

➭ Activate the measurement by pressing the Start softkey on the

instrument or on the included probe.

➭ If necessary, conduct zero balancing by pressing the Zero key

(see description below).

➭ Press the Stop softkey in order to end the measurement.

Improving Accuracy by means of Zero Balancing – Zero

Cable resistance and contact resistance can be eliminated in all measuring ranges by means of zero balancing.

➭ Short circuit the measurement cables to this end.

➭ Activate the measurement by pressing the Start softkey.

➭ Insofar as the value for Zero is less than a permissible threshold

of 0 to 50% of the measuring range, the Zero softkey is no lon- ger grayed out in the display and the Zero function can be activated by pressing the Zero key.

➭ The value ascertained for Zero is saved and appears above the

measurement display. Automatic compensation of cable resistance is activated for all subsequent measurements. Cable resistance is deleted after the measurement has been ended.

➭ The correction or offset value is deleted by pressing Zero once

again during measurement, or by ending the measurement. The value is cleared from the display.

The “Setup for currently selected measurement” submenu cannot be accessed for the milliohm measurement, because zero balancing and the polarity of the test current I view.

P can be selected directly in the measurement

Blown Fuse

In the event of a blown fuse, measurement is not possible and the following display appears:

GMC-I Messtechnik GmbH 39

6.14 Milliohm Measurement – m/4 (4-wire measurement)

Note

S– A

V

Tem p

/4

COIL

S+

Red

Black

Milliohm measurements at busbars, welding seems, coils with up to roughly 1 H etc. with the KC27 Kelvin Probe (or KC4 Kelvin clip)

If possible, tips which are not spring-loaded should be aligned inwardly to the DUT because they’re connected via the red plugs labeled S

and S– (sense).

Red

Black

0V!

Measuring ranges:

+20 mA/+200 mA/+1 A

Test current:

m

Measurement

KC27 or KC4

Voltage Drop

Measuring Current

Note:

If KC27 or KC4 is used, the red plug is always connected to S+ or S–.

: 0.001 m  30 

Overall measuring range:

Start

TComp

Cables,

+ –

3 m/30 m/300 m 3  30 

S– A

V

Tem p

m/4

COIL

S+

6.14.1 Compensation of Cable Resistance

Electrical resistance is a dipole which can generally only be measured using two poles. This is accomplished by directing a measuring current of predetermined magnitude through the device under test and measuring the resultant voltage drop. The respective resistance value is derived from the quotient of these two values.

The two points between which voltage is measured are decisive as regards the results of the measurement. All resistances between these two points add to the measured resistance value. These include contact resistance, as well as cable resistance. If a very low resistance value needs to be measured, for example contact resistance at a contactor with a value of only a few milliohms, the points between which voltage is measured must be moved out of the measuring instrument and positioned as closely as possible to the device under test. For this reason, the measuring instrument is equipped with separate jacks for current feed and voltage measurement. This type of 4-pole connection is known as connection according to Kelvin.

KC4 Kelvin clips and KC27 Kelvin probes (available as accessories) allow for simple, correct connection.

Measurement with the KC27 Kelvin Probe

6.14.2 Thermovoltage Compensation

Thermovoltages which occur as a result of material and temperature differences may distort measurement results. For this reason, the instrument is equipped with automatic thermal voltage compensation within the relevant ranges.

If measuring current is interrupted during the 4-L-m measurement, or if the fuse blows, “LEADS OPEN” blinks at the display. Refer to section 9.3 in the event of a blown fuse.

40 GMC-I Messtechnik GmbH

6.14.3 Milliohm Measurement with 200 mA or 20 mA DC [m]

➭ Make sure that the device under test is voltage-free (see sec-

tion 6.6.4). Interference voltages distort measurement results!

➭ Set the rotary switch to “m/4”.

➭ Select desired test current Ip set with the ▲▼ scroll keys.

➭ If applicable, select the desired measuring range using the

Man / Auto key: 30 m, 300 m, 3  (Ip set = +200 mA) or 30  (Ip set = +20mA).

➭ Connect the device under test as shown.

➭ Activate the measurement by pressing the Start softkey.

➭ If required, activate thermovoltage correction (see description

below).

➭ Press the Stop softkey in order to end the measurement. KC4 Kelvin clips and KC27 Kelvin probes (available as accesso-

ries) allow for simple, correct connection. Resistance at the current jacks should amount to <5. This measuring method is suitable for resistances with induc-

tances of up to 1 H.

Thermovoltage Correction in the 30/300 m Range

➭ Connect the measurement cables and press the TComp soft-

key in order to measure thermovoltage. Wait until the measured value has settled in. This may take several seconds, depending upon inductivity. After the measured value has settled in, press the Save softkey. The TComp softkey changes color from black to green. All future measurement results will be corrected based upon the previously measured thermovoltage value. Thermovoltage can also be measured during a running measurement after pressing the Start softkey. Use the same procedure as described above.

6.14.4 Milliohm Measurement with 1 A Pulsating Measuring Current

(automatic thermovoltage correction at 3

➭ Make sure that the device under test is voltage-free (see sec-

tion 6.6.4). Interference voltages distort measurement results!

➭ Set the rotary switch to “m/4”.

➭ Connect the device under test as shown.

KC4 Kelvin clips and KC27 Kelvin probes (available as accessories) allow for simple, correct connection.

Resistance at the current jacks should amount to < 0.5 .

➭ If applicable, select the desired measuring range using the

Man / Auto key: 3m (Ip set = +1A), (30 m or 300 m (Ip set = +1A)

➭ Connect the device under test as shown. Thermovoltage is compensated automatically.

➭ Activate the measurement by pressing the Start softkey.

➭ Press the Stop softkey in order to end the measurement.

The 1 A setting for test current can be protected with a password. If applicable, you’ll be prompted to enter the valid password.

See also section 4.4.6 on page 10, “Changing the Password”, and section 6.1 on page 20, “Enabling Parameter Changes”.

 300 m

)

Thermovoltage Correction in the 30/300 m Range

➭ First of all press the Start softkey and then the TComp softkey in

order to measure thermovoltage. The TComp softkey changes color from black to green. Wait until the measured value has settled in. This may take several seconds, depending upon inductivity. All future measurement results will be corrected based upon the previously measured thermovoltage value.

Measurements at Inductive Devices

Coils, for example in motors, choke ballasts and contactors, are highly inductive. Changes in current at inductive devices, including those caused by switching the milliohmmeter on and off or changing the measuring range, result in a corresponding voltage change. These changes may be of significant magnitude, and may result in arcing under unfavorable conditions. The milliohmmeter is protected against arcing by means of suitable voltage arrestors.

GMC-I Messtechnik GmbH 41

6.15 Current Measurement

Notes Regarding Current Measurement

• The multimeter may only be operated with installed rechargeable

battery pack or mains module. Dangerous currents are otherwise not indicated, and the instrument may be damaged.

• Set up the measuring circuit in a mechanically secure fashion, and secure it against inadvertent breaks. Select conductor cross-sections and lay out connections such that they do not overheat.

• In the case of current greater than 1.1 A, “OL” appears at the display.

• If the fuse for the active measuring range has blown, the blown fuse symbol appears at the digital display.

• If a fuse should blow, eliminate the cause of overload before placing the instrument back into service!

• Fuse replacement is described in section 9.3.

42 GMC-I Messtechnik GmbH

6.15.1 Direct and Pulsating Current Measurement, Direct Connec-

Func

ADC

A(AC+DC)

AAC

Func

A: 10 nA ... 1 A

5 ranges:

A DC measuring range:

300 A / 3 mA / 30 mA / 300 mA / 1 A

A (AC+DC) measuring range:

5 ranges:

300 A / 3 mA / 30 mA / 300 mA / 1 A

Func

Current

Zero

S– A

V

Tem p

m/4

COIL

S+

tion, – A DC and A (AC+DC)

➭ First disconnect supply power from the measuring circuit or

the power consumer (1), and discharge any capacitors.

➭ Set the rotary switch to A (A ).

➭ Repeatedly press the Func softkey until the desired measuring

function is displayed.

➭ If necessary, conduct zero balancing by pressing the Zero

softkey (see description below).

➭ Safely connect the measuring instrument (without contact re-

➭ Switch supply power to the measuring circuit back on (3).

➭ Read the display. Make a note of the measured value if the in-

➭ Disconnect supply power from the measuring circuit or the

➭ Remove the test probes from the measuring point and return

sistance) in series to the power consumer (2) as shown.

strument is not being operated in the memory mode or the transmission mode.

power consumer (1) once again, and discharge any capacitors.

the measuring circuit to its normal condition.

Improving Accuracy by means of Zero Balancing – Zero

The currently measured current value can be subtracted from future measurements in all measuring ranges.

➭ Press the Zero softkey.

➭ The value ascertained for Zero is saved and appears above the

measurement display. Automatic compensation is implemented for future measurements.

➭ The value for Zero is retained when the instrument is switched

to a different measuring function. The correction or offset value is deleted by pressing Zero once again, or when the instrument is switched off. The value is cleared from the display.

GMC-I Messtechnik GmbH 43

6.15.2 Alternating Current and Frequency Measurement, Direct

I > 1 A

A~: 10 nA ... 1 A

5 ranges:

300 A / 3 mA / 30 mA / 300 mA / 1 A

A AC measuring range:

Current

300 Hz / 3 kHz /

4 ranges:

30 kHz / 300 kHz

Hz: 0.01 ... 300 kHz

Hz measuring range:

Func

ADC

A(AC+DC)

AAC

Func

FuncZero

S– A

V

Tem p

m/4

COIL

S+

Connection, – AAC and Hz

➭ First disconnect supply power from the measuring circuit or

the power consumer (1), and discharge any capacitors.

➭ Set the rotary switch to A (A ).

➭ Repeatedly press the Func softkey until the desired measuring

function is displayed.

➭ If necessary, conduct zero balancing for AAC by pressing the

Zero softkey (see description below).

➭ Safely connect the measuring instrument (without contact re-

sistance) in series to the power consumer as shown.

➭ Switch supply power to the measuring circuit back on (3).

➭ Read the display. Make a note of the measured value if the in-

strument is not being operated in the memory mode or the transmission mode.

➭ Disconnect supply power from the measuring circuit or the

power consumer (1) once again, and discharge any capacitors.

➭ Remove the test probes from the measuring point and return

the measuring circuit to its normal condition.

Improving Accuracy by means of Zero Balancing – Zero

The currently measured current value can be subtracted from future measurements in all measuring ranges.

➭ Press the Zero softkey.

➭ The value ascertained for Zero is saved and appears above the

measurement display. Automatic compensation is implemented for future measurements.

➭ The value for Zero is retained when the instrument is switched

to a different measuring function. The correction or offset value is deleted by pressing Zero once again, or when the instrument is switched off. The value is cleared from the display.

44 GMC-I Messtechnik GmbH

6.15.3 Direct and Pulsating Current Measurement with Current

OKOKESC

mA/A: See table

Measuring ranges:

Func

ADC

A(AC+DC)

Zero

Current

Ri ~ 9 M

mA/A: See table

Measuring ranges:

Clip

 Off

S– A

V

Tem p

m/4

COIL

S+

Clamp Sensor – ADC and A (AC+DC)

Voltage/Current Transformer Output

When a current clamp sensor is connected to the multimeter (V input), all current displays appear with the correct value in accordance with the selected transformation ratio. The only prerequisite is that the current sensor is equipped with at least one of the below listed transformation ratios, and that the ratio has been previously selected in the following menu (Clip Off).

➭ Set the rotary switch to V or V .

➭ Press the MENU key.

➭ Press the “Setup for currently selected measurement” softkey.

➭ Set the Clip parameter to the desired transformation ratio (the

same ratio as selected at the current clamp sensor) as described below in the current clamp settings menu or select the desired transformation ratio with the scroll keys ▲▼.

➭ The display is returned to the measurement view by pressing

the ESC key three times.

➭ Repeatedly press the Func softkey until the desired measuring

function is displayed.

➭ Connect the current clamp sensor’s measurement cables as

shown.

➭ If necessary, conduct zero balancing by pressing the Zero key

(see description below).

Current Clamp Setup Menu

Transformation Ratio Measuring Ranges Clamp Type

1:10 1mV/10mA 3.000 A 30.00 A CP30

1:100

1:1000 1mV/1A 300.0 A 3,000 kA

The maximum allowable operating voltage is equal to the nominal voltage of the current transformer. value, additional error resulting from the current clamp sensor must also be taken into consideration

(default setting: Clip = Off = voltage display).

Improving Accuracy by means of Zero Balancing – Zero

The currently measured current value can be subtracted from future measurements in all measuring ranges.

➭ Press the Zero softkey.

➭ The value ascertained for Zero is saved and appears above the

measurement display. Automatic compensation is implemented for future measurements.

➭ The correction or offset value is deleted by pressing Zero, by

changing to another measuring function or by switching the instrument off. The value is cleared from the display.

Setup for currently selected measurement

Off / 1:1 / 1:10 / 1:100 / 1:1000



3 x > Measurement View

300 mV 3 V

1:1 1mV/1mA 300.0 mA 3.000 A

1mV/100mA

30.00 A 300.0 A

When reading the measured

 Clip

CP330/1100/ 1800

GMC-I Messtechnik GmbH 45

6.15.4 Alternating Current Measurement with Current Clamp Sen-

MENUOKOK

ESC

Func

AAC

Hz (A)

Current

Ri ~ 9 M

mA/A: See table

Measuring ranges:

Hz: 300 Hz/3 kHz/

Hz: 30 kHz/300 kHz

Clip  Off

Zero

S– A

V

Tem p

m/4

COIL

S+

sor – AAC and Hz

Voltage/Current Transformer Output

➭ Set the rotary switch to V~ or Hz.

➭ Press the MENU key.

➭ Press the “Setup for currently selected measurement” softkey.

➭ Set the Clip parameter to the desired transformation ratio (the

same ratio as selected at the current clamp sensor) as described below in the current clamp settings menu or select the desired transformation ratio with the scroll keys ▲▼.

➭ The display is returned to the measurement view by pressing

the ESC key three times.

➭ Repeatedly press the Func softkey until the desired measuring

function is displayed.

➭ Connect the current clamp sensor’s measurement cables as

shown.

➭ If necessary, conduct zero balancing by pressing the Zero key

(see description below).

➭ The correction or offset value is deleted by pressing Zero, by

changing to another measuring function or by switching the instrument off. The value is cleared from the display.

Current Clamp Setup Menu

Setup for currently selected measurement

Off / 1:1 / 1:10 / 1:100 / 1:1000 

Transformation Ratio Measuring Ranges Clamp Type

1:1 1mV/1mA 300.0 mA 3.000 A

1:10 1mV/10mA 3.000 A 30.00 A

3 x > Measurement View

300 mV 3 V

1:100

1mV/100mA

30.00 A 300.0 A

1:1000 1mV/1A 300.0 A 3,000 kA

 Clip

METRAFLEX 300M WZ12C, Z3512A

CP30, METRAFLEX 3000/300M WZ11B, WZ12B, Z3512A

CP330/1100/1800 METRAFLEX 3000/300M, WZ11B, Z3512A

CP330/1100/1800 METRAFLEX 3000 WZ12C, Z3512A

The maximum allowable operating voltage is equal to the nominal voltage of the current transformer. value, additional error resulting from the current clamp sensor must

When reading the measured

also be taken into consideration (default setting: Clip = Off = voltage display).

Improving Accuracy by means of Zero Balancing – Zero

The currently measured current value can be subtracted from future measurements in all measuring ranges.

➭ Press the Zero softkey.

➭ The value ascertained for Zero is saved and appears above the

measurement display. Automatic compensation is implemented for future measurements.

46 GMC-I Messtechnik GmbH

6.16 Measuring Sequences

If the same sequence of single measurements will be run frequently (one after the other with subsequent report generation), it’s advisable to make use of measuring sequences.

One sequence with up to 10 measurement steps can be created. The measuring steps can include measuring functions as well as measuring instructions. As a firmware version 1.003.000, this can be increased to 16 measuring sequences with up to 63 measurement steps with the help of a functions expansion (see section

4.4.9 on page 11). Automatic measuring sequences can be conducted in all rotary

switch positions except for OFF.

Creating a New Measuring Sequence

Firmware < 1.003.000

➭ Select any rotary switch position other than “OFF”.

➭ Press the “MENU” key.

➭ Press the “Edit/delete new measuring sequence” softkey. The

sequence’s steps are displayed.

➭ First of all assign a name to the sequence to be created. Press

the “SEQ Name” softkey to this end.

➭ Enter a name using the keyboard which appears at the display

as described on page 10.

➭ Acknowledge your entry by pressing the “Enter” softkey.

The sequence’s steps are displayed once again.

➭ You can insert a measuring step with any desired measuring

function after pressing the “Ins Function” softkey.

➭ Press the “Ins Function” key, select the desired function with

the rotary switch and acknowledge your selection by pressing the STORE key.

➭ The “Information > Sequence draft > Accept function with

STORE key” window is displayed once every 5 seconds for a duration of 1 second.

➭ If you would like to insert measuring instructions, press the

“Ins Check” softkey.

➭ You can enter a comment for each measuring step (measur-

ing function or measuring instructions), which appears at the display during the measuring sequence, for example “measure voltage at point XY”. Press the “Comment” softkey to this end.

➭ Enter a text using the keyboard which appears at the display

as described on page 10.

➭ Acknowledge your entry by pressing the “Enter” softkey.

The sequence’s steps are displayed once again.

➭ Individual measuring steps can be removed by selecting the

desired step with the cursor and then pressing the “Delete” softkey.

Firmware ≥ 1.003.000

➭ Select any rotary switch position other than “OFF”.

➭ Press the “MENU” key.

➭ Press the “Edit Sequence” softkey. The sequences are dis-

played.

➭ First of all assign a name to the sequence to be created. Press

the “New” softkey to this end.

➭ Enter a name using the keyboard which appears at the display

as described on page 10.

➭ Acknowledge your entry by pressing the “ENTER” softkey.

The sequences are displayed again.

➭ Select a sequence with the “OK” softkey.

➭ You can insert a measurement step with any desired measur-

ing function after pressing the “Ins Function” softkey.

➭ Press the “Ins Function” key, select the desired function with

the rotary switch and acknowledge your selection by pressing the STORE key.

➭ The “Information > Sequence draft > Accept function with

STORE key” window is displayed once every 5 seconds for a duration of 1 second.

➭ If you want to insert a manual test step, for example a visual

inspection, press the “Ins Check” softkey.

➭ You can enter a comment for each measurement step (mea-

suring function or measuring instructions), which appears at the display during the measuring sequence, for example “measure voltage at point XY”. Press the “Comment” softkey to this end.

➭ Enter a text using the keyboard which appears at the display

as described on page 10.

➭ Acknowledge your entry by pressing the “Enter” softkey.

The sequence’s steps are displayed once again.

➭ Individual measurement steps can be removed by selecting

the desired step with the cursor and then pressing the “Delete” softkey.

Running a Measuring Sequence

Firmware < 1.003.000

➭ Select any rotary switch position other than “OFF”.

➭ Press the “MENU” key.

➭ Press the “Start sequence” softkey. General information con-

cerning the measuring sequence is displayed at first: STORE: Press the STORE key at the multimeter or on the Z270S probe at the end of a measuring step in order to save one or more measured values. OK: Press the OK key at the end of a measuring step in order to start the next measuring step.

GMC-I Messtechnik GmbH 47

ESC: The sequence can be interrupted by pressing the ESC key. Values saved up to this point in time are stored under a name.

➭ Press the “Start” softkey with red background.

➭ Information concerning the pending measuring step is dis-

played first of all: Sequence step 1/x: Measuring function XY and measuring instructions if applicable.

➭ Acknowledge this information by pressing the “OK” softkey

with green background.

➭ A warning appears prompting you to select the rotary switch

position which is required for the respective measuring function.

➭ The active sequence is displayed in the status bar by means

of the SEQ symbol.

➭ The respective measuring function is started automatically if

as a voltage measurement is involved. For other measuring functions, the “Start” softkey for the respective measuring function must first be pressed, and subsequently the “Stop” softkey.

➭ Press the STORE key in order to save the measured value

➭ Press the OK key in order to start the next measuring step.

➭ If the last measuring step of the measuring sequence is ended

by pressing the “OK” softkey, the first four measuring steps or measuring functions are displayed and stored with value, date and time. Press the ▼ scroll key in order to display further measuring steps.

➭ The measuring sequence is ended by pressing the “STORE”

softkey. A corresponding message appears.

Firmware ≥ 1.003.000

➭ Select any rotary switch position other than “OFF”.

➭ Press the “MENU” key.

➭ Press the “Start sequence” softkey. General information con-

cerning the sequence is displayed at first: STORE: Press the STORE key at the multimeter or on the Z270S probe at the end of a measurement step in order to save one or more measured values. OK: Press the OK key at the end of a measurement step in order to start the next measurement step. (If manual has been selected under “Menu > Sequence > Measured value storage”, the measured value is saved and the new measurement step is started automatically after pressing the OK key.) ESC: The sequence can be interrupted by pressing the ESC key. Values saved up to this point in time are stored under a name.

➭ Press the “Start” softkey with red background.

➭ Information concerning the pending measurement step is dis-

played first of all: Sequence step 1/x: Measuring function XY and measuring instructions if applicable.

➭ Acknowledge this information by pressing the “OK” softkey

with green background.

➭

A warning appears prompting you to select the rotary switch position which is required for the respective measuring function.

➭ The active sequence is displayed in the status bar by means

of the SEQ symbol.

➭ The respective measuring function is started automatically if a

voltage measurement is involved. For other measuring functions, the “Start” softkey for the respective measuring function must first be pressed, and subsequently the “Stop” softkey.

➭ Press the OK key in order to save the measured value The next

measurement step is then started.

➭ If the last measurement step of the measuring sequence is

ended by pressing the “OK” softkey, the first four measurement steps or measuring functions are displayed and stored with value, date and time. Press the ▼ scroll key in order to display further measurement steps.

➭ The measuring sequence is ended by pressing the “STORE”

softkey. A corresponding message appears.

Overview of the Meanings of Softkeys and Hard Keys

Firmware < 1.003.000

Key Meaning

Softkeys

SEQ Name Enter or change the name of a measuring sequence*

Ins Function Insert a measuring step above the selected line with measuring function

Ins Check Insert a measuring step above the selected line with measuring instruc-

tions

Delete Delete the measuring step which was previously selected with the cursor

Comment Enter a comment regarding the selected measuring step via the key-

board*

Start Start the measuring sequence

Start the measurement

Stop Stop the measurement

End the measuring sequence

OK Softkey: Acknowledge instructions during the measuring sequence

Hard Keys

▲▼ Sequence creation: Select measuring step (1 to 10)

STORE Sequence creation: Transfer the measuring function to the sequence

Sequence run: Save the measured value for the current measuring step by pressing the hard key at the multimeter or on the Z270S probe

OK Sequence run: End the measuring step

* Description of keyboard operation for entering text (see page 10)

Firmware < 1.003.000

Key Function

Softkeys

New Create a new measuring sequence

Rename Change the name of the measuring sequence

Ins Function Insert a measurement step with a measuring function above the selected

line

Ins Check Insert a measurement step with a measuring instruction above the se-

lected line

Delete Delete a measurement step which has been previously selected with the

cursor or delete a sequence which has been previously selected with the cursor

Comment Enter a comment regarding the selected measurement step via the key-

board *

Start Start the measuring sequence

Start the measurement

Pause Temporarily suspend the measurement

Temporarily suspend the measuring sequence

Abort Abort the measurement

Abort the measuring sequence

OK Softkey: acknowledge instructions in the measuring sequence

Hard Keys

▲▼ Sequence creation: select measurement step (1 to 10)

STORE Sequence creation: transfer the measuring function to the sequence

Sequence run: save the measured value for the current measurement step by pressing the hard key at the multimeter or on the Z270S probe

OK Sequence run: end the measurement step

* Description of keyboard operation for entering text (see page 10)

48 GMC-I Messtechnik GmbH

7 Interface Operation

Warning!

Attention!

7.1 Bluetooth Interface

In the case of the METRAHIT IM XTRA BT (M273D) and the METRAHIT IM E-DRIVE BT (M274B), wireless transmission is possible via Blue-

tooth to a PC, as well as to a smartphone or a tablet PC (Android).

If you adjust the settings in a METRAHIT IM XTRA BT or METRAHIT IM E-DRIVE BT via Bluetooth, please make sure that the Bluetooth connection has been established with the device to be configured rather than with another METRAHIT IM device that might also be located nearby. Apart from that, we recommend using an individual device PIN in order to prevent third parties from having access to your devices.

Activating the Interface

Interface > Bluetooth > On/Off in the General Setup menu

Configuring Interface Parameters

Interface > PIN > 1234 in the General Setup menu

7.2 WiFi Interface

In the case of the METRAHIT IM XTRA WiFi (M273W) and the METRAHIT IM E-DRIVE WiFi (M274W), WiFi transmission is possible

to a PC, as well as to a smartphone or a tablet PC (Android).

The METRALOG app can be obtained from the Google Play Store (see QR code to the right) and installed to your smartphone or tablet PC (operating systems as of Android 2.3.3).

Any and all liability is excluded for possible software errors, in particular also resulting from interaction with other applications.

Condensed Instructions

1 Tap the app logo in order to start the program. 2 Select METRAHIT IM XTRA BT or METRAHIT IM E-DRIVE BT from the

list of receivable Bluetooth devices. The following message appears: “Connecting to measuring instrument via Bluetooth”.

3 In order to enable wireless connection, enter the same PIN

which you also entered under the multimeter’s PIN interface parameter. After connection has been successfully established, an analog display appears and “Measurement completed” appears at the bottom right.

4 You can switch back and forth amongst digital display, Y(t)

measured value curve and analog display in the footer at the left-hand side.

5 You can start or stop a measured value recording by tapping

the REC symbol.

6 You can switch the display to the measured value logger over-

view by tapping the magnifying glass icon in the footer at the right-hand side Measuring intervals can be selected here, in order to display them graphically or transmit them.

Activating the Interface

Interface > WiFi > On/Off in the General Setup menu

USB-Bluetooth Adapter for PC

The following Bluetooth adapters for communication between the METRAHIT IM XTRA BT / METRAHIT IM E-DRIVE BT and the PC have already been successfully tested: Belkin F8T016NG, LOGI LINK BT0007 and SITECOM CN-524 V2 001.

Bluetooth adapters from other manufacturers should meet at least the following technical requirements:

Bluetooth 4.2 + EDR, class 2

Terminal Program for a PC

Measured values received via a Bluetooth adapter can be displayed and evaluated at a terminal program.

METRALOG App for Smartphone and Tablet PC

If you use a smartphone or a tablet PC with the Android operating system and a Bluetooth interface, our METRALOG app provides the following functions in combination with the METRAHIT IM XTRA BT / METRAHIT IM E-DRIVE BT TRMS digital multimeter:

• Display of received multimeter measured values as: Digital or analog values, measured value curve Y(t), measured value logger

• Recording of measuring operations

• Transmission of logs via wireless services and network services

• Acoustic warning in the event that wireless connection is interrupted

• Trigger in the event of exceeding or falling short of an adjustable limit value

• SMS and/or acoustic warning in the case of trigger events

GMC-I Messtechnik GmbH 49

8 Characteristic Values

Measuring Func-

tion

(input)

Measuring Range

Resolution at

Upper Range Limit

30.000 3.000

Input impedance

300 mV 10 V9M 9M // < 50 pF 0.15 + 10

3 V 100 V9M 9M // < 50 pF 0.15 + 10

30 V 1 mV 9 M 9M // < 50 pF 0.15 + 10

300 V 10 mV 9 M 9M // < 50 pF 0.2 + 20

1000 V 100 mV 9 M 9M // < 50 pF 0.2 + 20

Voltage drop at approx. range limit

300 A 10 nA 70 mV 0.25 + 10 1+ 30

3 mA 100 nA 165 mV

30 mA 1 A 190 mV

300 mA 10 A 450 mV

1 A 100 A1.2V 1 A 5 min.

A @ V

Factor: 1:1/10/100/1000

0.3/3/30/300 A 300 mV

3, 30, 300, 3 k A

Measuring input Input impedance ~

3V Plus current transformer clamp error 1000 V Max. 10 s

Voltage measurement input approx. 9 M

( V socket)

Open-circuit voltage

m @

pulse

(4-wire)

m@

200 mA

(4-wire)

m@

20 mA (4-

wire)

2-wire

EN61557

3m 0.001 m 2.8 … 3.8 V 1 A 1.0 +20

30 m 0.01 m 2.8 … 3.8 V 1 A

300 m 0.1 m 2.8 … 3.8 V 1 A

30 m 0.01 m > 4 V 200 mA

300 m 0.1 m > 4 V 200 mA

3  1 m > 4 V 200 mA

30  10 m > 4 V 20 mA 0.5 + 7

@ 200 mA: 3  1 m > 4 V 200 mA 2.5 +10 @ 20 mA: 30  10 m > 4 V 20 mA 2.5 +10

300  10 m < 1.4 V Approx. 300 A 0.2 + 30



(2-

wire)

3k 100 m < 1.4 V Approx. 100A

30 k 1  < 1.4 V Approx. 10 A 0.15 + 10

300 k 10  < 1.4 V Approx. 1 A 0.15 + 10

3M 100  < 1.4 V Approx. 0.2 A 0.5 + 10

30 M 1k < 1.4 V Approx. 0.03A 2.0 + 10

300  100 m Approx. 3 V

4,5 V

1 mV Approx. 8 V 0.5 + 2

Discharge resis-

tance

Approx. 1 mAconst.

30 nF 10 pF 10 M 0.7 V 1.5 + 10

300 nF 100 pF 1 M 0.7 V 1 + 6

3 F 1 nF 100 k 0.7 V 1 + 6

30 F10nF12k 0.7 V 1 + 6

300 F100nF3k 0.7 V 5 + 6

Hz (V)/

Hz (A)

(A )

RPM

C / F

15 ... 45 ... 65 Hz ... 100 kHz sinusoidal. See influence on page 51.

At 0  ... + 40 C

Display up to 5.1 V, “OL” for higher values.

Applies to measurements at film capacitors

Lowest measurable frequency for sinusoidal measuring signals symmetrical to the zero point

Overload capacity of the voltage measurement input: Power limiting: frequency x voltage max. 6 x 10

Overload capacity of the current measurement input: see current measuring ranges for maximum current values

Input sensitivity, sinusoidal signal: 10% to 100% of the voltage or current measuring range, restriction in mV measuring range: 30% rdg. The voltage measuring ranges with max. 10 kHz apply in the A measuring range.

Plus sensor deviation

With active ZERO function

300 Hz 0.01 Hz

3kHz 0.1Hz

30 kHz 1 Hz

300 kHz 10 Hz 20 Hz

10.0 ... 90.0

10.0 ... 90.0 > 1 kHz ... 4 kHz 0.2% MR/kHz + 8 d

5.0 ... 95.0

0.1%

15.0 ... 85.0 > 1 kHz ... 4 kHz 0.2% MR/kHz + 8 d

3 V AC

30 V AC

Resolution Voltage MR

30 … 30,000 1 RPM

– 200 ...

Pt 100

+850 C

(NiCr-Ni)

– 200 ... +850 C

– 250 ...

+1372 C

0.1 C

V x Hz @ U > 100 V

Intrinsic Uncertainty at Reference Conditions

30.000 3.000 30.000 30.000

~ /

0.15 + 10 0,5 + 30

0.15 + 10

Meas. current at

range limit

0 max

min

1 Hz

Frequency MR (... % MR + ... d)

15 Hz ... 1 kHz 0.2% rdg. + 8 d 1000 V

15 Hz ... 1 kHz 0.2% rdg. + 8 d

14 15

16)

(... % rdg. + ... d)

3,000

0.5 + 7

0.15 + 10

1 + 5

(... % rdg. + ... d)

4 10

(... % rdg. + ... d)

0.05 + 5

(... % rdg. + ... K)

0.5% + 1.5

1% + 5

Accuracy applies as of 1% MR. Values < 50 digits are suppressed at the zero point due to the

TRMS transformer.

10 minute cool-down period Required signal range: 30% to 100% of the voltage measuring range The integrated FF1A/1000V fuse blows in the event of overloading The integrated FF0.315A/1000V fuse blows in the event of overloading For measuring range 30 m and 300 m with function TComp active

1, 11

0.5 + 30 1.0 + 30

1, 11

10)

1.0 + 30 d

10)

1, 11

0.5 + 30 d 1.0 + 30 d

1, 11

Value Time

1000 V

RMS

Sinusoi-

0.3 A Cont.

Measurement input

±0.6V

1000 V

RMS

Sinusoi-

1000 V

RMS

Sinusoi-

Hz (V) 6:

Hz(A )6:

1000 V

Hz (A):

DC AC

RMS

Sinusoidal

1000 V

DC/AC

RMS

Sinusoidal

Key: d = digit(s), MR = measuring range, rdg. = reading (measured value)

Overload

Capacity

dal

2(... % rdg. + ... d)

Cont.

Max. 10 s

Cont.

Max. 10 s Pt 1000

50 GMC-I Messtechnik GmbH

Insulation Measurement

Measuring Range Resolution

3 ... 1000 V

300 k 0.1 k

3 M 1k

30 M 10 k

300 M 100 k

3000 M 1M

TRMS interference voltage measurement (V frequency response width: > 65 Hz ... 500 Hz, accuracy: 3% + 30 digits

Measuring

Function

interference

M

@UISO

Nom.

Open-

Voltage

Circuit Voltage

max.

1000 V

— —— —

1.2 x

100

250,

500 V

INS

1.12x U

INS

Nominal Voltage

ISO

Ri=1M

50/100/250/500 V 50/100/250/500/1000 V 50/100/250/500/1000 V 50/100/250/500/1000 V

AC+DC

Nom.

Short-

Cur-

Circuit

rent I

Cur-

rent I



250, 500, 1000 V

) with 1 M input resistance,

Acoustic Signal

U > 1000

1.0 mA < 1.4mAU > 1000 V 1000 V 10 s

Intrinsic Uncer-

tainty at Reference

Overload Capacity

for

Value Time

1000 V

Conditions



(% rdg. + d)

3 + 3 2 + 10 2 + 10 2 + 10 5 + 10 5 + 10

Inter-turn short circuit test (only with optional COIL adapter)

Measuring Range Resolution

0.3 V ... 1000 V

10.0 ... 30.9 μs 0.1 [μs] 31 ... 250 μs 1 [μs]

TRMS interference voltage measurement (V frequency response width: > 65 Hz ... 500 Hz, accuracy: 3% + 30 digits

The time value may vary by up to 10% for different COIL Adapters. This is entirely without consequence if you perform measurements with the same COIL Adapter and compare them.

Nominal Voltage

ISO

Ri=1M



1000 V

) with 1 M input resistance,

AC+DC

Intrinsic Uncer-

tainty at Reference

Conditions



(% rdg. + d)

3 + 30 > 100 digits

1% rdg. +/- 10 D

Inductance measuring ranges of optional COIL Adapters:

• COIL Adapter XTRA (Z270M): 10 μH to 5 H

• COIL Adapter 50 mH (Z270F): 10 μH to 50 mH

Continu-

ous

Frequency Influence for VAC V

Frequency Range

15 Hz ... 45 Hz 2 + 30 2 + 30 2 + 30

> 65 Hz ... 1 kHz 0.5 + 30 0.5 + 30 1 + 30

> 1 kHz ... 10 kHz 2 + 30 1.5 + 30 10 + 30

> 10 kHz ... 20 kHz 3 + 30 1.5 + 30 –

> 20 kHz ... 50 kHz 3 + 30 5 + 30 –

> 50 kHz ... 100 kHz 10 + 30 10 + 30 –

For sinusoidal input signals > 10% to 100% of the range (mV range: as 30% of the range), at 1% to 10% of the range: f < 50 kHz, intrinsic error increased by 0.2% of the upper range limit.

Overload capacity of the voltage measurement input: Power limiting: frequency x voltage max. 6 x 10

300 mV range

± (... % rdg. + ... digits)

Frequency Influence for IAC / I

Frequency Range

15 Hz ... 45 Hz 2 + 30 2 + 30

> 65 Hz ... 1 kHz 1 + 30 1 + 30

> 1 kHz ... 2 kHz 1 + 30 1 + 30

> 2 kHz ... 5kHz 1 + 30 3 + 30

> 5 kHz ... 10 kHz 5 + 30 5 + 30

For sinusoidal input signals > 10% to 100% of the range.

Influencing

Quantity

Crest Factor CF

Except for sinusoidal waveform

Influencing

Quantity

Relative Atmospheric Humidity

Battery Voltage –Ditto

300 A to 300 mA

± (... % rdg. + ... digits)

Sphere of Influence

1 ... 3

> 3 ... 5  3% rdg.

Sphere of Influence

75%

3 days

instrument off

Voltage Ranges

AC+DC

Deviation

3 V, 30 V, 300 V range ± (... % rdg. + ... digits)

V x Hz @ U > 100 V

Current Measuring Ranges

AC+DC

Influence Error

Measured Qty./

Measuring Range

V, A

1 A range

± (... % rdg. + ... digits)

Influence Error

Measured Qty. Influence Error

V, A, , F, Hz, C 1 x intrinsic uncertainty

Included in intrinsic uncer-

1000 V range

± (... % rdg.)

 1% rdg.

tainty

Internal Clock

Time format DD.MM.YYYY hh:mm:ss Resolution 0.1 s (measured values timestamp) Accuracy  1 minute per month Temperature influence

50 ppm/K

Reference Conditions

Ambient temperature + 23 C 2K Relative humidity 40%  75% Measured quantity frequency Measured quantity waveform

45 Hz  65 Hz Sinusoidal

Supply voltage 4.0 V 0.1 V

Influencing Quantities and Influence Error

Influencing

Quantity

Temperature

With zero balancing

Sphere of Influence

0 C ... +21 C

and

+25 C... +40 C

Measured Qty./

Measuring Range

V 0.2 + 5

V 0.4 + 5

300  ... 3 M 0.5 + 5

30 M 1 + 5

mA/A 0.5 + 5

mA/A 0.8 + 5

30 nF ... 300 F2 + 5

Hz 0.2 + 5

C/F (Pt100/Pt1000) 0.5 + 5

Influence Error

(...% rdg. + ... d)/10 K

Influencing

Quantity

Common Mode Interference Voltage

Series Mode Interference Voltage

Sphere of Influence

Interference quantity max. 1000 V V > 90 dB

Interference quantity max. 1000 V

50 Hz ... 60 Hz sinusoidal

Interference quantity: V , respective nominal value of the measuring range,

max. 1000 V , 50 Hz ... 60 Hz

sinusoidal

Interference quantity max. 1000 V V > 50 dB

Measured Qty./

Measuring Range

3 V , > 90 dB

30, 300 V > 150 dB

1000 V > 150 dB

V> 50dB

Response Time (after manual range selection)

Measured Qty./

Measuring Range

V, V

A, A

300  ... 3 M 2s

30 M,

M

@UISO

Continuity < 50 ms

C (Pt 100) Max. 3 s

30 nF ... 300 FMax. 5s

>10 Hz 1.5 s

Response Time

Digital Display

1.5 s

Max. 5 s

1.5 s

Jump Function

of the Measured Quantity

From 0 to 80%

of upper range limit value

From  to 50%

of upper range limit value

From 0 to 50%

of upper range limit value

Damping

GMC-I Messtechnik GmbH 51

Display

Power Supply

TFT color graphic display (55 x 36 mm) with analog and digital display including unit of measure, type of current and various special functions

Background Illumination

Activated background illumination can be regulated by means of a light sensor.

Analog Bar Graph

Scaling Linear Polarity display With automatic switching Sampling rate 40 measurements per second and display

refresh

Digital Measured Value Display

Resolution / char. height

320 x 480 dots, 12 mm

Number of places 31,000 / 3,100

4¾-place in the

V, A, Hz and



measuring

functions depending on parameter setting

Overflow display “OL” is displayed for  31,000 digits

or  3100 digits

Polarity display “–” (minus sign) is displayed

if plus pole is connected to “”

Sampling rate 10 and 40 measurements per second

with the Min-Max function except for the capacitance, frequency and duty cycle measuring functions

Refresh rate 2 times per second, every 500 ms

Battery pack 3.7 V, 4000 mAh, LiPo

(approx. 25% self-discharging per year)

Service life Approx. 20 hours (without M

surement / R

/ R 4-wire)

INS

mea-

Battery indicator Battery capacity display via battery sym-

bol: , querying of momentary charge level via menu function.

Power OFF function

The multimeter is switched off automatically: – When battery voltage

drops to below approx. 3.6 V – If none of the keys or the rotary switch are activated for an adjustable duration of

10 to 59 min. and the multimeter

is not in the continuous operation mode

Rechargeable battery packs can only be recharged externally.

Measuring Function

Times 0.7 for interface operation

Nominal Voltage U

V 20 V 15

RISO

100 V 1 M 5 100 V 100 k 300 500 V 500 k 60

1000 V 2 M 20

DUT Resistance

Service Life in Hours

Number of Possible Measurements with Nom. Current per VDE 0413

Electromagnetic Compatibility (EMC)

Electrical Safety

Protection category Measuring category CAT III CAT IV Nominal voltage 1000 V 600 V Pollution degree 2 Test voltage 7.4 kV~ per EN 61 010-1:2011/

II per EN 61010-1:2010/VDE 0411-1:2011

VDE 0411-1:2011

Fuse

Current measuring ranges F1: FF 1 A/1000 V AC/DC;

& 2L m measuring 6.3 x 32 mm ranges Fuse with breaking capacity of 30 kA at

1000 V AC/DC, protects the current measurement input in the 300 A to 1 A ranges

2L mmeasuring ranges

F2: FF 0,315 A / 1000 V

6.3 x 32 mm Fuse with breaking capacity of 30 kA at 1000 V AC/DC

Interference emission EN 61 326-1:2013 class B

Interference immunity EN 61326-1:2013

Short-term measured value deviation of up to 10% may occur during electromagnetic interference thus reducing the specified operating quality.

Ambient Conditions

Accuracy range 0 C ... +40 C Operating temperatures

(storage temp. w. battery)

Storage temperatures 25 C ... +70 C (without battery) Relative humidity 40 ... 75%, no condensation allowed Elevation To 2000 m Place of use

10 C ... +50 C 20 C ... +50 C with rubber holster

Indoors, except within specified ambient conditions

52 GMC-I Messtechnik GmbH

Data Interface

Typ e

Bluetooth 4.2 Frequency band 2.402 ... 2.480 GHz Transmitting power Max. 91 mW Functions – Query measuring functions

and parameters

– Query momentary measurement data

Internal Measured Value Storage

Memory capacity 64 MBit for approx. 300,000 measured

values with indication of date and time

Mechanical Design

Housing Impact resistant plastic (ABS) Dimensions 235 x 105 x 56 mm

(without rubber holster) Weight Approx. 0.7 kg with battery pack Protection Housing: IP 52

IP XY

Protection Against Foreign

digit X)

0 Not protected 0 Not protected 1  50.0 mm  1 Vertically falling droplets 2  12.5 mm  2 Dripping (15 angle) 3  2.5 mm  3 Spraying water 4  1.0 mm  4 Splashing water 5 Dust protected 5 Jet-water

(pressure equalization by means of the

housing)

Table Excerpt Regarding Significance of

IP Codes

Object Ingress

IP XY

(2nd digit Y)

Protection Against Water

Ingress

Applicable Regulations and Standards

DIN EN 61010–1 VDE 0411-1

DIN EN 61326-1 VDE 0843-20-1

DIN EN 60529 VDE 0470-1

Safety requirements for electrical equipment for measurement, control and laboratory use – Part 1: General requirements

Electrical equipment for measurement, control and laboratory use –EMC requirements – Part 1: General requirements

Test instruments and test procedures – degrees of protection provided by enclosures (IP code)

GMC-I Messtechnik GmbH 53

9 Maintenance and Calibration

Note

Attention!

Note

Attention!

Note

Attention!

Press Tabs

Micro USB 5 V DC, 2 A

Approx. 2 h

Z270L

Removing the Battery Pack

Recommendation:

Disconnect the instrument from the measuring circuit before removing the battery pack or the mains module!

Disconnect the instrument from the measuring circuit before opening the fuse cover in order to replace the fuse!

9.1 Displays – Error Messages

Message Function Meaning

FUSE Current measurement Blown fuse

In all operating modes Battery voltage has fallen below 3.3 V

0L Measurement Indicates overflow

9.2 Battery Pack

Removing the Battery Pack during Periods of Non-Use

The integrated quartz movement draws power from the battery pack even when the instrument is switched off. It’s advisable to remove the battery pack before long periods of non-use for this reason (e.g. vacation). This prevents excessive depletion, which may result in damage to the lithium-ion batteries under unfavorable conditions.

Removing the Battery Pack or Mains Module

Stored measurement data are not lost when the battery pack or the mains module is removed. The selected operating parameters remain in memory, although date and time must be reentered. End any automatic measured data recordings which are currently running before removal. Removing the battery pack or the mains module during storage operations may cause data loss or corrupt memory.

Recommendation:

Turn the rotary switch to the OFF position and disconnect the instrument from the measuring circuit before removing the battery pack or the mains module!

➭ Briefly press the two

locking tabs towards each other at the same time with thumb and forefinger, and then release them again. Pull the battery pack up and out as shown in the figure to the right.

Charging the Battery Pack

➭ Connect the

micro USB port to the charger.

The charge LED lights up yellow during the charging process. The charging cable can be removed as soon as the charge LED lights up green at the end of the charging process.

Querying the Battery Pack’s Charge Level

Momentary battery capacity can be queried by clicking the Info item in the General Setup menu:

➭ Press the MENU key to this end.

➭ Then press the General Setup softkey.

➭ Select the Info parameter with the help of the

The “Battery” parameter indicates the battery pack’s charge level as a percentage.

 scroll keys.

Please observe the currently valid safety notes for lithium-Ion batteries!

Installing the Battery Pack

Disconnect the instrument from the measuring circuit be-

If the “ ” symbol appears at the display, the battery pack should be replaced as soon as possible. You can continue working with the instrument, but reduced measuring accuracy may result.

fore removing the battery pack for charging!

➭ Push the battery pack back in until resistance is plainly per-

ceptible.

➭ In order to snap the battery back into place, press the two

locking tabs towards each other at the same time with thumb and forefinger.

➭ Push the battery back into its final position and release the

locking tabs.

54 GMC-I Messtechnik GmbH

9.3 Fuse

Attention!

Note

Attention!

Testing the Fuse

The fuse is tested automatically:

• When the instrument is switched on with the rotary switch in

the A position

• When the instrument is already on and the rotary switch is turned to

the A position

• In the active current measuring range when voltage is applied

If the fuse is blown or if no fuse has been inserted the “FUSE” symbol appears at the display. The fuse interrupts the current measuring ranges. All other measuring ranges remain functional.

Replacing the Fuse

If a fuse should blow, eliminate the cause of overload before placing the instrument back into service!

Disconnect the instrument from the measuring circuit before opening the fuse cover in order to replace the fuse!

➭ Set the instrument face

down onto the working surface.

➭ Turn the slotted screw

on the cover with the fuse symbol counterclockwise.

➭ Lift off the cover and

pry the fuse out using the flat side of the fuse cover.

➭ Insert a new fuse. Make

sure that the fuse is centered, i.e. between the tabs at the sides.

➭ When replacing the fuse cover, insert the side with the guide

hooks first. Tighten the screw by turning it clockwise.

➭ Dispose of the blown fuse with the trash.

9.4 Housing Maintenance

No special maintenance is required for the housing. Keep outside surfaces clean. Use a slightly dampened cloth for cleaning. In particular for the protective rubber surfaces, we recommend a moist, lint-free microfiber cloth. Avoid the use of cleansers, abrasives or solvents.

9.5 Measurement Cables

Inspect the measurement cables for mechanical damage at regular intervals.

Even in the case of minimal damage to the test leads, we recommend sending them to GMC-I Service GmbH without delay.

9.6 Returns and Environmentally Sound Disposal

The instrument is a category 9 product (monitoring and control instrument) in accordance with ElektroG (German electrical and electronic device law). This device is subject to the WEEE directive. Furthermore, we make reference to the fact that the current status in this regard can be accessed on the Internet at www.gossenmetrawatt.com by entering the search term WEEE.

We identify our electrical and electronic devices in accordance with WEEE 2012/19/EU and ElektroG using the symbol shown at the right per DIN EN 50419.

These devices may not be disposed of with the trash. Please contact our service department regarding the return of old

devices (see address in section 1.3).

Disposal of the Battery Pack (rechargeable lithium-ion battery)

If the battery pack is no longer usable, it must be disposed of properly in accordance with valid national directives.

Dispose of the rechargeable battery in accordance with applicable regulations or send it to GMC-I Service GmbH for free disposal (see address in section 1.3).

Use specified fuses only! If fuses with other blowing characteristics, other current ratings or other breaking capacities are used, the operator is placed in danger, and protective diodes, resistors and other components may be damaged. The use of repaired fuses or short-circuiting the fuse holder is prohibited.

Testing the Fuse with the Instrument Switched On After inserting the fuse with the instrument switched on, the instrument must be switched off briefly and then switched back on again, or briefly switched to a non-current measuring range and then back to the A measuring range. If contact is poor or the fuse is blown, the “FUSE” symbol appears at the display.

GMC-I Messtechnik GmbH 55

9.7 Recalibration

Note

Attention!

The measuring tasks performed with your instrument, and the stressing it’s subjected to, influence aging of its components and may result in deviation from the specified levels of accuracy.

In the case of strict measuring accuracy requirements, as well as in the event of use at construction sites with frequent stress due to transport and considerable temperature fluctuation, we recommend a relatively short calibration interval of once per year. If your instrument is used primarily in the laboratory and indoors without considerable climatic or mechanical stressing, a calibration interval of once every 2 to 3 years is sufficient as a rule.

During recalibration* at an accredited calibration laboratory (DIN EN ISO/IEC 17025), deviations from traceable standards demonstrated by your measuring instrument are documented. Ascertained deviations are used to correct display values during later use of the instrument.

We would be happy to perform DAkkS or factory calibration for you at our calibration laboratory. Further information is available on our website:

www.gossenmetrawatt.com ( COMPANY  Quality and Certificates  DAKKS Calibration Center  Calibration Questions and Answers.

10 Accessories

10.1 General

The extensive accessories available for our measuring instruments are checked for compliance with currently valid safety regulations at regular intervals, and are expanded as required for new applications. Currently up-to-date accessories which are suitable for your measuring instrument are listed at the following web address along with photo, order number, description and, depending upon the scope of the respective accessory, data sheet and operating instructions: www.gossenmetrawatt.de ( PRODUCTS  Measuring Technology – Portable – Multimeters  Specialized Applications  METRAHIT IM XTRA ...  Accessories).

10.2 Technical Data for Measurement Cables (included with KS17-2 cable set and Z270S probe)

Electrical Safety

Maximum rated voltage Measuring category Maximum rated current 1 A 1 A 16 A

With safety cap attached

Without safety cap

Observe the measuring instrument’s maximum values for electrical safety!

600 V 1000 V CAT IV CAT III CAT II

—

—— 

1000 V

Recalibration of your instrument at regular intervals is essential for the fulfillment of requirements according to quality management systems per DIN EN ISO 9001.

Regular calibration of the test instrument should be performed in a calibration laboratory which is accredited per DIN EN ISO/IEC 17025.

* Examination of the specification, as well as adjustment, are not included

in calibration. However, in the case of our own products, any required adjustment is performed and adherence to the specification is confirmed.

9.8 Manufacturer’s Guarantee

All METRA HIT digital multimeters and calibration instruments are guaranteed for a period of 3 years after date of shipment. The manufacturer’s guarantee covers materials and workmanship. Damages resulting from use for any other than the intended purpose or operating errors, as well as any and all consequential damages, are excluded.

The calibration certificate confirms that the product’s specified technical data were complied with at the point in time of calibration. We guarantee compliance with the specified technical data within the permissible tolerances for a period of 12 months after delivery.

Ambient Conditions (EN 61010-031)

Tem pe rat ur e – 20 C ... + 50 C Relative humidity 50 ... 80% Pollution degree

Use of KS17-2 and Z270S

Measurements per DIN EN 61010-031 may only be performed in environments in accordance with measuring category III with the safety cap attached to the test probe at the end of the measurement cable.

In order to establish contact inside 4 mm jacks, the safety caps have to be removed by prying open the snap fastener with a pointed object (e.g. the other test probe).

56 GMC-I Messtechnik GmbH

11 Index

Absorption Index Measurement ..........................................................................25

Accessories ......................................................................................................2, 56

Addresses ...............................................................................................................4

Automatic Shutdown

Specifying a Time

AUTO-Range Function .........................................................................................13

..................................................................................... 11

Battery Pack

Charge Level Symbols at the Display

Charging .................................................................................................... 54

Disposal ..................................................................................................... 55

Installation .................................................................................................54

Periods of Non-Use ................................................................................... 54

Querying Charge Level via Menu .............................................................54

Removal .................................................................................................... 54

Bluetooth ..............................................................................................................49

........................................................ 7

Cable Resistance .................................................................................................36

Calibration Seal ......................................................................................................8

Capacitance Measurement ..................................................................................35

COIL ADAPTER XTRA ...........................................................................................22

COIL TEST ADAPTER (COIL ADAPTER 50mH) ....................................................22

Continuity Test .....................................................................................................38

Current Clamp Sensor ...................................................................................45, 46

Current Measurement

Notes .........................................................................................................42

Data Backup ...........................................................................................................6

Device Returns .....................................................................................................55

Diode Test ............................................................................................................38

Discharge .............................................................................................................21

Discharging ....................................................................................................24, 27

Duty Cycle Measurement ....................................................................................32

Error ......................................................................................................................21

Error Messages ....................................................................................................54

Functions Expansion ............................................................................................11

Fuse

Replacement

Test ............................................................................................................ 55

............................................................................................. 55

Guarantee .............................................................................................................56

Included Features ...................................................................................................2

Interface

................................................................................................... 49

Bluetooth

WiFi ........................................................................................................... 49

Interference Voltage Detection ............................................................................21

Inter-Turn Short Circuit Measurement ................................................................22

Keyboard for Entering Text ..................................................................................10

Maintenance

..................................................................................................... 55

Housing

Manufacturer’s Guarantee ...................................................................................56

Measured Value Storage

Data Function

Min-Max Values ........................................................................................16

Measurement Cables ...........................................................................................56

Measuring Category

Significance Measuring Range Selection

Automatic

............................................................................................ 15

................................................................................................. 5

.................................................................................................. 13

Manual ...................................................................................................... 13

Memory

Activating the Trigger ............................................................................... 18

Adjusting Recording Time ........................................................................ 17

Adjusting the Trigger Threshold .............................................................. 18

Clearing Memory ...................................................................................... 19

Creating Groups ....................................................................................... 19

Ending Recording ..................................................................................... 19

Querying Occupancy ................................................................................ 19

Setting Hysteresis ..................................................................................... 18

Setting the Recording Type ...................................................................... 17

Setting the Sampling Rate ....................................................................... 17

Start Recording ......................................................................................... 19

Trigger Mode Operation ........................................................................... 18

Milliohm Measurement

2-Wire Measurement

4-Wire Measurement ............................................................................... 40

............................................................................... 39

Overview

Keys and Connections

................................................................................ 7

Parameter

Adjusting Recording Time

Auto-OFF .................................................................................................. 11

Brightness ................................................................................................... 9

Change Password .................................................................................... 10

Clear Memory ........................................................................................... 19

Date/Time ................................................................................................... 9

Default Settings ........................................................................................ 11

Display Profile ........................................................................................... 10

Display Zeros ............................................................................................ 10

Entering the Reference Temperature ...................................................... 37

Language .................................................................................................... 9

Manual/Measured Reference Temperature ............................................ 37

Measured Reference Temperature .......................................................... 37

Query Memory Occupancy ...................................................................... 19

Setting the Sampling Period .................................................................... 17

Temperature U/M ..................................................................................... 37

Password

..................................................................................................... 10

Change

Parameter Changes ................................................................................. 20

Polarization Index Measurement .........................................................................29

Product Support .....................................................................................................4

Product Support Hotline ........................................................................................ 4

........................................................................ 17

Recalibration ........................................................................................................56

Recalibration Service ....................................................................................... 4, 56

Reference Junction ..............................................................................................37

Repair and Replacement Parts Service ................................................................4

Resistance Measurement ....................................................................................34

Returns

Device ....................................................................................................... 55

RPM Measurement ..............................................................................................32

Safety Precautions .................................................................................................5

Battery Pack ............................................................................................... 6

General ....................................................................................................... 5

Scope of Delivery ...................................................................................................2

Switching the Instrument On

Manual ........................................................................................................ 9

Symbols

Danger

........................................................................................................ 6

Digital Display ............................................................................................. 7

Instrument .................................................................................................. 8

on the Instrument ....................................................................................... 8

Rotary Switch Positions .............................................................................. 8

User Interface ............................................................................................. 8

GMC-I Messtechnik GmbH 57

Temperature Measurement

With Thermocouples ................................................................................ 37

Test Sequences ...................................................................................................47

Use for Intended Purpose ......................................................................................6

Use of KS17-2 and Z270S ..................................................................................56

Voltage Comparator .................................................................................31, 32, 33

Voltage Measurement

Notes ......................................................................................................... 30

WEEE Mark .............................................................................................................8

58 GMC-I Messtechnik GmbH

GMC-I Messtechnik GmbH 59

All trademarks, registered trademarks, logos, product designations and company names are the property of their respective owners.

GMC-I Messtechnik GmbH Südwestpark 15 90449 Nürnberg •

Germany

Phone +49 911 8602-111 Fax +49 911 8602-777 E-Mail info@gossenmetrawatt.com www.gossenmetrawatt.com

Gossen Metrawatt M274A, M273A, M274B, M273D, M273W User guide

Specifications and Main Features

Frequently Asked Questions

User Manual

1 Addresses

1.1 Product Support

1.2 Recalibration Service

1.3 Repair and Replacement Parts Service Calibration Center* and Rental Instrument Service

2 Safety Features and Precautions

2.1 Use for Intended Purpose

2.2 Meanings of Danger Symbols

2.3 Meanings of Acoustic Warning Signals

3 Operating Overview

3.1 Connections, Keys, Rotary Switch, Symbols

3.2 Symbols Used in the Digital Display

3.3 Symbols Used for Rotary Switch Positions

3.4 User Interface Symbols in the Following Sections

3.5 Symbols on the Instrument

4 Initial Startup

4.1 Battery Pack

4.2 Mains Module

4.4.2 Language >German/English – Selecting the User Interface Language

4.3 Switching the instrument On

4.4 Querying or Setting Operating Parameters – General Setup

4.4.3 System > Date/Time – Setting Date and Time

4.4.1 Info > Version – Check Current Software Version

4.4.4 System > Brightness – Digital Display Brightness

4.4.5 System > Display Zeros

4.4.6 System > Change Password

4.4.7 System > Display Profile – Digital Display View

4.4.8 System > Default Settings

4.4.10 Switching the Instrument Off

4.4.11 System > Auto-OFF – Automatic Shutdown

4.4.9 System > Functions Expansion

5 Control Functions

5.1 Help

5.2 Selecting Measuring Functions and Measuring Ranges

5.2.1 Automatic Range Selection

5.2.2 Manual Range Selection

5.2.3 Quick Measurements

5.3 Zero Offset / Relative Measurements

5.4 Display (TFT)

5.4.1 Digital Display

5.4.2 Analog Display

Measured Value Storage – Data Function (auto-hold/compare)

5.5.1 Saving Minimum and Maximum Values – “MinMax”

5.6 Measured Value Memory – STORE Function.

5.6.1 Remote read-out and storage via the Z270S probe

5.7 Measurement Data Recording

6 Measurements

6.2 Insulation Resistance Measurement – RISO Function

6.1 Enabling Parameter Changes

6.2.1 Preparing for Measurement

6.2.2 Performing Insulation Measurement

6.2.3 Ending the Measurement and Discharging

6.3.1 Inter-Turn ShortCircuit Measurement with the COIL TEST ADAPTER

Inter-Turn Short Circuit Measurement with COIL ADAPTER XTRA

6.4 Absorption Index Measurement – DAR

6.5 Polarization Index Measurement – PI

6.6 Voltage Measurement

6.6.2 Duty Cycle Measurement – Duty AC

6.6.3 RPM Measurement – RPM AC

6.8 Capacitance Measurement F

Temperature Measurement with Resistance Thermometer – Temp RTD

6.11 Continuity Test

6.12 Diode Testing with Constant Current of 1 mA

6.13 Milliohm Measurement – Rlo (2-wire measurement)

6.14.1 Compensation of Cable Resistance

6.14.2 Thermovoltage Compensation

6.15 Current Measurement

6.16 Measuring Sequences

7 Interface Operation

7.1 Bluetooth Interface

7.2 WiFi Interface

8 Characteristic Values

9 Maintenance and Calibration

9.1 Displays – Error Messages

9.2 Battery Pack

9.3 Fuse

9.4 Housing Maintenance