Gossen Metrawatt METRAHIT EXTRA, METRAHIT ETECH, METRAHIT ESPECIAL, METRAHIT EBASE User guide

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Operating Instructions

METRAHITEXTRAETECHESPECIALEBASE

High Resolution TRMS Digital Multimeter

3-349-456-03

10/5.17

Standard Equipment Contact Persons

Standard Equipment

1 Multimeter in HC20 hard case 1 KS17-S measurement cable set 2 Batteries 1 DAkkS calibration certificate 1 Protective rubber cover 1 Condensed operating instructions *

* Detailed operating instructions are available for download on the Internet at www.gossenmetrawatt.com

Overview of features included

Function EXTRA ETECH ESPECIAL EBASE Voltage VDC

(Ri  9 M) Voltage VAC TRMS

(Ri  9 M)

Voltage Lo (Ri 1 M)

Voltage V (Ri 9 M)

Frequency Hz @ V @ Lo

Low-pass filter 1 kHz @ VAC / @ LoV Bandwidth @ V Frequency MHz @ 5V Duty cycle %

TRMS

AC+DC

bzw.

bzw. VAC100 kHz 20 kHz 1 kHz

AC+DC

TTL

Voltage level measurement dB Resistance  Continuity test

@ICONST = 1 mA Diode measurement

= 1 mA

CONST

Temperature measurement C/F @T

✓

✓✓✓

✓✓✓✓

✓✓✓

—

✓✓✓✓

... 300 kHz ... 300 kHz ... 300 kHz

1 Hz...1 MHz

2.0 % ... 98 % — — —

———

... 300 kHz

—

✓✓✓✓ ✓✓✓✓

✓✓✓✓

Typ K

Function EXTRA ETECH ESPECIAL EBASE Temperature measurement

C/F R

Capacitance measurement F Current A

Current A Current A Bandwidth @ A Frequency Hz @ A Measurement with current clamp

with adjustable transfer factor Data logger function 2)

(memory) Relative value measurement

AC+DC

TRMS

AC+DC

bzw. A



REL

Zero point ZERO MIN/MAX/DATA Hold IR-interface (?8.4 kBd) Power pack connector socket Protective rubber cover Fuse Protection

Measuring category

DAkkS calibration certificate

Alternating voltage measurement with specially reduced input impedance

) 16 Mbit = 2048 kByte = 61,600 measured values, sampling rate adjustable from 0.1

seconds to 9 hours

IP 65 available with the METRAHIT OUTDOOR model

Pt100/Pt1000 — —

✓✓

600 A/6 mA 60 mA/600 mA 6 A/10 A (16 A)

60 mA/600 mA 6 A/10 A (16 A)

10 kHz

... 60 kHz

mV / A mA / A

16 Mbit — — —

——

6 A/10 A (16 A)

— —

mV / A

A / A

mV / A

—

✓✓✓✓ ✓✓✓✓ ✓✓✓✓ ✓✓✓✓ ✓

———

✓✓✓✓

10 A / 1000 V 10 A / 1000 V — —

IP52 IP52 IP52 IP52

1000 V CAT III

600 V CAT IV

600 V CAT II

1000 V CAT III

600 V CAT IV

✓✓✓✓

2 GMC-I Messtechnik GmbH

Contact Persons

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 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.com

1 Safety Features and Precautions

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

This instrument fulfills the requirements of the applicable EU guidelines and national regulations. This is confirmed by means of the CE mark. A corresponding declaration of conformity can be requested from GMC-I Messtechnik GmbH.

The TRMS digital multimeter has been manufactured and tested in accordance with the following safety regulations: IEC 61010–1:2010 / DIN EN 61010–1/VDE 0411–1:2011. When used for its intended purpose (see page 10), 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 is imperative that you read the operating instructions thoroughly and carefully before placing your instrument into service, and that you follow all instructions contained therein.

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.

The METRAHIT E measuring range. It’s designed for measurements in current transformer circuits and is approved for measuring category 600 V CAT II.

SPECIAL multimeter does not have a fuse for the current

Measuring Categories and their Significance per IEC 61010-1

CAT Definition

Measurements in electrical circuits

which are not directly connected to the mains:

for example electrical systems in motor vehicles and aircraft, batteries etc.

Measurements in electrical circuits

which are electrically connected to the low-voltage mains:

with plugs, e.g. at home, in the office or laboratory etc.

Measurements in building installations:

III

stationary power 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, for example 1000 V CAT II I.

For the application of measuring cables see chapter 10.2.

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 contact hazards and taking the appropriate safety precautions. Contact hazards according to 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 contact hazards. Be certain that a second person is present.

8 GMC-I Messtechnik GmbH

Safety Precautions

• Maximum allowable voltage between the voltage measuring

terminals, and between all connections and earth is 1000 V for measuring category II I, or 600 V for measuring category IV. The METRAHIT E

SPECIAL variant is an exception.

• 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 chapter 8, “Technical Data”, in the table entitled “Measuring Functions and Measuring Ranges” in the “Overload Capacity” column.

• The multimeter may only be operated with installed batteries or rechargeable batteries. Dangerous currents and voltages are otherwise not indicated, and the instrument may be damaged.

• The instrument may not be operated if the fuse cover or the battery compartment lid has been removed, or if its housing is open.

• The input for the current measuring range is equipped with a

fuse link (exception: METRAHIT E

SPECIAL and METRAHIT EBASE).

Maximum permissible voltage for the measuring circuit (= rated voltage of the fuse) is 1000 V AC/DC. Use specified fuses only (see page 60)! The fuse must have a breaking capacity of at least 30 kA.

GMC-I Messtechnik GmbH 9

Safety Precautions

Repair and Parts Replacement

When the instrument is opened, voltage conducting parts may be exposed. The instrument must be disconnected from the measuring circuit before the performance of repairs or the replacement of 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.

Opening of Equipment / Repair

The equipment may be opened only by authorized service personnel to ensure the safe and correct operation of the equipment and to keep the warranty valid.

Even original spare parts may be installed only by authorized service personnel.

In case the equipment was opened by unauthorized personnel, no warranty regarding personal safety, measurement accuracy, conformity with applicable safety measures or any consequential damage is granted by the manufacturer.

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 61)

1.1 Use for Intended Purpose

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

• Only those types of measurements described in chapter 5 may be performed with the measuring instrument.

• The measuring instrument, including measurement cables and plug-on test probes, may only be used up through the maximum specified measuring category (see page 61 and the table on page 8 regarding significance).

• Overload limits may not be exceeded. See technical data on page 54 for overload values and overload limits.

• Measurements may only be performed under the specified ambient conditions. See page 61 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 61).

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1.2 Meanings of Danger Symbols

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

Warning concerning dangerous voltage at the measurement input: U > 55 V AC or U > 70 V DC

1.3 Meanings of Acoustic Warning Signals

Voltage warning: > 1000 V (intermittent acoustic signal)

Current warning: > 10 A (intermittent acoustic signal)

Current warning: > 16 A (continuous acoustic signal)

Safety Precautions

GMC-I Messtechnik GmbH 11

Operating Overview – Connections, Keys, Rotary Switch, Symbols

* METRA HIT EBASE: Current measurement by means of current clamp sensors with

voltage output only



chapter 4.3

chapter 3 chapter 5

chapter 7

chapter 6



chapter 3

ff.

chapter 3



chapter 4.1



chapter 4.1.2

Max. 1000 V!

chapter 4.1 

chapter 4.4

chapter 6

chapter 3

chapter 3.1





chapter 1.2

chapter 6

Operating Overview – Connections, Keys, Rotary Switch, Symbols

1 Display (LCD) (see page 13 for significance of symbols) 2 MAN / AUTO shift key for manual/automatic measuring range selection

 Increase parameter values

Operating mode menu:

ON / OFF | LIGHT

key for switching device and display illumination on and off

4 FUNC | ENTER multifunction key

Operating mode menu: Acknowledge entry (ENTER)



Increase measuring range or move decimal point to the right (MAN function)

5 6

Rotary switch

for measuring functions, (see page 15 for significance of symbols) 7 DAkkS calibration mark 8 Connector socket for ground 9 Connector socket for current measurement with automatic blocking

10 Connector socket for voltage, resistance, temperature, diode

capacitance measurement with automatic blocking

11 DATA/MIN/MAX

Key for freezing, comparing and deleting measured value, and for Min/Max

 Decrease values

Operating mode menu: Select individual menu entries in direction of flow

12 MEASURE | SETUP

Key for switching back and forth between measuring and menu function

13 ZERO | ESC

Key for zero balancing Operating mode menu: Exit current menu level and

14 Decrease measuring range or move decimal point to the left (MAN function) 15 Connector for power pack (METRAHIT EXTRA only) 16 Infrared interface

Select individual menu entries against direction of flow

and

return to a higher level, exit parameters configuration without saving data

12 GMC-I Messtechnik GmbH

Symbols Used in the Digital Display

Battery full

Battery OK

Battery weak

Battery (almost) dead, U < 1.8 V

Active data transmission to /  from multimeter

IR interface in stand-by mode (ready to receive starting commands)

Battery level indicator

Interface indicator

1 21011

16 17

765

2022

Operating Overview – Connections, Keys, Rotary Switch, Symbols

1 Battery level indicator 2 ON: continuous operation (automatic shutdown deactivated) 3 MAN: manual measuring range selection is active 4 Digital display with decimal point and polarity display 5 max/min: Min/Max value storage 6 DATA: display memory, “freeze” measured value 7 STORE: memory mode active, with METRAHIT E

XTRA only

8 ISO: no function here

9 Upm: no function here 10 Transformation factor (current clamp factor) 11 IR: infrared interface display 12 Scale for analog display 13 Pointer for analog display (bar graph – pointer)

depending upon setting in SET menu for the A.diSP parameter

Triangle appears: indicates overranging 14 dB: Alternating voltage level measurement 15 Selected type of current 16 TRMS measurement 17 Pt100/Pt1000: selected platinum resistance sensor with

automatic recognition of Pt100/Pt1000, with METRAHIT E

METRAHIT E

TECH only

XTRA and

18 Type K: temperature measurement with type K (NiCr-Ni) thermocouple 19 sec (seconds): unit of time 20 REL: relative measurement with reference to offset 21 Unit of measure 22 ZERO: zero balancing active

23 Warning regarding dangerous voltage: U > 55 V AC or U > 70 V DC

24 Continuity test with acoustic signal is active 25 Diode measurement selected 26 h (hours): unit of time

GMC-I Messtechnik GmbH 13

Operating Overview – Connections, Keys, Rotary Switch, Symbols

1kHz

AC DC+

AAA

Symbols of Rotary Switch Positions

Switch

V~ 0/4 V~ AC TRMS Alternating voltage, TRMS AC, full bandwidth  Hz (V) 1 Hz ~ AC Voltage frequency, up to 300 kHz  V~ 2 V Fil ~ AC TRMS Alternating voltage, TRMS AC, with low-pass (1 kHz) — dB 3 dB ~ AC TRMS Alternating voltage level measurement  V~ 1 M V~ 1 V Fil ~ AC TRMS Alternating voltage, TRMS AC, up to 1 kHz, input 1 M— Hz (V) 1 M V 0/2 V DC Direct voltage  V 1V DC MHz 0/2 MHz (High) frequency @ 5 V~ up to 1 MHz  ——— % 1 % Duty cycle @ 5 V~  ———



Temp TC 0/2 Temp RTD 1 C Pt 100/1000 Temperature with resistance sensor Pt 100/Pt 1000 ——

A 0/2 A DC Direct current value — A 1 A DC + AC TRMS Pulsating current value, TRMS AC+DC — A~ 0/2 A~ AC TRMS Alternating current value, TRMS AC — Hz (A) 1 Hz ~ AC Current frequency —

Hz ( ) 1 Hz ~ AC Current frequency 

FUNC

Display Measuring Function

METRAHIT E

XTRA

METRAHIT E

TECH

METRAHIT E

SPECIAL

METRAHIT E

BASE

 0/3 V~ AC TRMS Alternating voltage, TRMS AC, full bandwidth, input 1 M—

 2 Hz ~ AC Voltage frequency, up to 300 kHz, input 1 M—

AC TRMS Pulsating voltage, TRMS ( ) 

—  (Direct current) resistance  0/2  Continuity testing with acoustic signal 

— nF Capacitance ——

0/2 A DC Direct current value with AC DC current clamp sensors 1 V:1/10/100/

0/2 A~ AC TRMS

V DC Diode voltage up to 6 V 

C Typ-K

A DC +AC TRMS Pulsating current value, TRMS, with AC DC current clamp sensors,

Temperature thermocouple Type K 



1000 A



see above Alternating current strength, TRMS, with current clamp sensors, see above



14 GMC-I Messtechnik GmbH

Operating Overview – Connections, Keys, Rotary Switch, Symbols

5 V / 600 mA

Serial number

Registration number Date of calibraion (year – month)

German Accrediation Body GmbH – Calibration lab

XY123

2012-08

D-K-

15080-01-01

User Interface Symbols in the Following Chapters

 ...  Scroll through main menu

 ...  Scroll through sub-menu

  Select decimal point

 Increase/decrease value

time Sub-menu/parameter (7-segment font)

1nFo Main menu (7-segment font, boldface)

Symbols on the Device

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

Ground

CAT II Measuring category II device, see also

“Measuring Categories and their Significance per IEC 61010-1” on page 8

CAT III / IV Measuring category III or IV device, see also

“Measuring Categories and their Significance per IEC 61010-1” on page 8

Continuous, doubled or reinforced insulation

▲ IR ▼ Position of the infrared interface, window on the top of

the instrument

Position of the power pack connector socket, see also chapter 3.1 (METRAHIT E

Fuse for current measuring ranges, see chapter 9.3 (not METRAHIT E

SPECIAL and METRAHIT EBASE)

The 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 chapter 9.5).

Calibration mark (blue seal):

3 Initial Start-Up

3.1 Inserting Batteries or Rechargeable Batteries

Be certain to refer to chapter 9.2 regarding correct battery installation.

Momentary battery voltage can be queried in the Info menu (see chapter 6.3).

Disconnect the instrument from the measuring circuit before opening the battery compartment lid in order to replace the batteries.

Operation with the Power Pack (accessory for METRAHIT E

Installed batteries are disconnected electronically if the NA X-TRA power pack is used, and need not be removed from the instrument. If rechargeable batteries are used, they must be recharged externally. If the external power supply is switched off, the device is automatically switched to battery operation without interruption.

3.2 Activation

Switching the Instrument On Manually

➭ Press the ON / OFF | LIGHT key until the display appears.

Power-up is acknowledged with a brief acoustic signal. As long as the key is held depressed, all of the segments at the liquid crystal display (LCD) are illuminated. The LCD is depicted on page 13. The instrument is ready for use as soon as the key is released.

XTRA, not included, see chapter 10.3)

Display Illumination

After the instrument has been switched on, background illumination can be activated by briefly pressing the ON / OFF | LIGHT key. Illumination is switched back off by once again pressing the same key, or automatically after approximately 1 minute.

Switching the Instrument On via PC

The multimeter is switched on after transmission of a data block from the PC, assuming the “irStb ” has been set to “ir on ” (see chapter 6.4).

However, we recommend using the power saving mode: “ir 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 chapter 9.2).

3.3 Setting the Operating Parameters

Setting Time and Date

See the “t iME ” and “dAtE ” parameter in chapter 6.4.

Display Modes for the Analog Display

Selection can be made from two different display modes (see “A.diSP ” parameter in chapter 6.4).

Display Modes for the Digital Display

Selection can be made from two different display modes (see “0.diSP ” parameter in chapter 6.4).

16 GMC-I Messtechnik GmbH

Initial Start-Up – Setup

ON / OFF

LIGHT

FUNC

ENTER

ON / OFF

LIGHT

Auto-Range

8.8.8.8.8

Illumination On

000.00

ON / OFF

LIGHT

Illumination Off

000.00

ON / OFF

LIGHT

0ff

ON / OFF

LIGHT

Long (1 s)

3.4 Switching the Instrument Off

Switching the Instrument Off Manually

➭ Press the ON / OFF | LIGHT key until 0FF appears at the display.

Shutdown is acknowledged with a brief acoustic signal.

Automatic Shutdown

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 F 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 (see “APoFF ” parameter on page 49.) Shutdown is acknowledged with a brief acoustic signal. Exceptions include: Transmission and memory mode operation, continuous operation and whenever a dangerous voltage is applied to the input (U > 55 V AC or U > 70 V DC).

Disabling Automatic Shutdown

The instrument can be set to continuous operation.

➭ Simultaneously press the and keys to

this end.

The “Continuous On” function is indicated at by means of the

ON display to the right of the battery symbol.

The „Continous On“ setting can only be undone by changing the appropriate parameter (device off parameter, see „APoFF “ on page 49), or by switching off the device manually. In this case, the parameter is reset to 10 minutes.

➭

GMC-I Messtechnik GmbH 17

Control Functions

4 Control Functions

4.1 Selecting Measuring Functions and Measuring Ranges

The rotary switch is linked to the automatic socket blocking mechanism, which only allows access to two connector jacks for each function. Be certain to remove the appropriate plug from its respective jack before switching to and from the “A” functions. The socket blocking mechanism prevents the user from inadvertently turning the selector switch to impermissible functions after the measurement cables have been plugged in to the instrument.

4.1.1 Automatic Range Selection

The multimeter is equipped with auto-ranging for all measuring functions, except for temperature measurement, diode and continuity testing, and the MHz measuring function. 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.

The Auto-Ranging Function

The multimeter is switched automatically to the next higher range at (60000 d + 1 d 06000 d), and to the next lower range at (05000 d - 1 d  50000 d).

Exception, capacitance measurement:

The multimeter is switched automatically to the next higher range at (6000 d + 1 d 0 600 d), and to the next lower range at (0500 d - 1 d  5000 d).

4.1.2 Manual Measuring 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

 scroll key.

 or

The instrument is automatically returned to 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:

600 mV* 6 V 60 V 600 V 1000 V

Hz(V AC):

600 Hz 6 kHz 60 kHz 300 kHz

MHz

600 Hz 6 kHz 60 kHz 600 kHz  1 MHz



: 600

A: METRAHIT E



 or 

MAN / AUTO

* Via manual measuring range selection only

METRA HIT E

60 mA

METRA HIT E

Hz (A AC):

600 Hz 6 kHz 60 kHz

A: A

A siehe chapter 5.7.3 ff.

F: METRAHIT E

60 nF

Return to automatic measuring range selection —

Manual mode active:

utilized measuring range is fixed



6 k



60 k



600 k

XTRA

: 600A 6 mA 60 mA

600 mA 6 A 10 A (16 A)

TECH



600 mA 6 A 10 A (16 A)

SPECIAL

: 6 A  10 A (16 A)

(mV) 600 mV  6 V

(mA) 60 mA  600 mA 6 A

XTRA

und

METRAHIT E



600 nF 6 F 60F 600F



TECH

6 M



60 M



MAN



MAN

18 GMC-I Messtechnik GmbH

Control Functions

Note

4.1.3 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. selection of the measuring

range with the best resolution (see chapter 4.1.2).

•With the DATA function (see chapter 4.4). In this way, the

appropriate measuring range is selected automatically after the first measurement and the second measurement is executed more quickly.

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

4.2 Zero Offset / Relative Measurements

Depending upon deviation from the zero point, zero balancing or a reference value for relative measurements can be stored to memory:

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

0 to 200 digits ZERO REL

> 200 to 25000 digits REL

Display

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

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

Zero Balancing

➭ Plug the measurement cables into the instrument and connect

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

➭ Briefly press the ZERO | ESC key.

The instrument acknowledges zero balancing with an acoustic signal, and the “ZERO REL” symbol appears at the LCD. The value measured at the moment the key is pressed serves as a reference value.

➭ Zero balancing can be cleared by once again pressing the

ZERO | ESC key.

As a result of TRMS measurement, the multimeter displays a residual value of 1 to 30 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 1000 V and 10 A ranges).

Setting the Reference Value

➭ Plug the measuring cables into the instrument and measure a

reference value (max. 25,000 digits, or 5000 digits in 10 A range).

GMC-I Messtechnik GmbH 19

Control Functions

➭ Briefly press the ZERO | ESC key.

The instrument acknowledges storage of the reference value with an acoustic signal, and the “ZERO REL” or the “REL” symbol appears at the LCD. 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 | ESC key.

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.

4.3 Display (LCD)

4.3.1 Digital Display

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

The measured value with decimal and plus or minus sign appears

4.3.2 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.

Two different display modes can be selected in the “SET ” menu with the help of the “A.diSP ” parameter (see chapter 6.4):

• Bar graph

• Pointer: The current measured value is tracked in real-time. The analog scale displays a negative range of 2 scale divisions for

the measurement of zero-frequency quantities, allowing for precise observation of measured value fluctuation around zero. If the measured value exceeds the negative range of 2 scale divisions, polarity is reversed at the analog display.

Scaling of the analog scale is automatic. This is very helpful for

manual measuring range selection. at the digital display. The selected unit of measure and type of current are displayed as well. A minus sign appears to the left of the value during measurement of zero-frequency quantities, if the plus pole of the measured quantity is applied to the “” input. The “0.diSP ” parameter can be used to determine whether lead-

Overranging

Overranging in the positive range is displayed by means of the

right triangle symbol. ing zeros will be appear or be suppressed at the measured value

display (see chapter 6.4).

Overranging

If the upper range limit of 60,000 digits is exceeded “0L” (overload)

Refresh Rate

In the bar graph and pointer modes, the analog display is

refreshed 40 times per second. appears at the display. Exceptions: „0L “ appears at the display as of 6000 digits during capacitance measurement, as well as during continuity and diode testing.

20 GMC-I Messtechnik GmbH

Note

V, A, Hz

t [s]

60,000

5,000

Activated

Reactivated

Save

of measuring range

dB, F, MHz, %

Control Functions

4.4 Measured Value Storage: DATA (auto-hold / compare)

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

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.

DATA

Function

Activate Brief blinks Once

Save (stabilized measured

value)

Reactivate

Press

DATA /

Min/Max

However, when the digital display if “frozen”, the decimal point is fixed as well (fixed measuring range, symbol: MAN). The selected measuring range should not be manually changed as long as the DATA function is active.

The DATA function is deactivated by pressing and holding the DATA/MIN/MAX key (for approx. 1 second), when the measuring function is changed or when the instrument is switched off and back on again.

GMC-I Messtechnik GmbH 21

Change to

Min/Max

Exit Long

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.

Key: MV = measured value, R = measuring range

Brief See table in chapter 4.4.1

Condition Response from Instrument

Measuring

Function

V, A, Hz, dB,

F, M Hz , %



V, A, Hz, dB,

F, M Hz , %



Measuring

Signal

> 10%

of R

0L

< 10%

of R

= 0L

Display

Digital

Is displayed

Stored

Is cleared Is cleared

DATA

Static

Blinks

Acous-

tic

Once

Twi ce

Control Functions

Note

Example

The voltage measuring range is set manually to 6 V. The first measured value is 3 V, which is stored to memory because it is greater than 5,000 digits of the measuring range (= 0.5 V), and is thus reliably above the background noise level. As soon as the measured values drops to less than 5,000 digits of the measuring range, i.e. amounts to less than 0.5 V which corresponds to removal of the test probes from the measuring point, the instrument is ready to store a new value.

4.4.1 Saving Minimum and Maximum Values – MIN/MAX Function

Minimum and maximum measured values applied to the measuring instrument’s input after the Min/Max function has been activated can be “frozen” at the display. The most important use of this function is the determination of minimum and maximum values during long-term measured value observation.

The Min/Max function can be activated in all measuring functions. The Min/Max function has no effect on the analog display, at

which the momentary measured value continues to appear. Apply the measured quantity to the instrument and set the

measuring range with the MAN / AUTO key before activating the Min/Max function.

The Min/Max function is deactivated by pressing and holding the DATA/MIN/MAX key (for approx. 1 second), when the measuring function is changed or when the instrument is switched off and back on again.

Min/Max

Function

Activate

and save

Save and

display

Return to 1

Stop Long Are deleted

Press

DATA /

Min/Max

2 x brief are saved

Brief

Min. and Max.

Measured Values

Storage continues in

background,

new min. and max.

values are displayed.

Same as 1,

stored values are not

deleted

Response from Instrument

Display

Measured

Value

Digital

Momentary

measured

value

Saved min.

value

Saved max.

value

Same as 1

Momentary

measured

value

Max.

Min.

Max

and

min.

Min. 1 x

Max. 1 x

Same

as 1

de-

leted

Acoustic

Signal

2 x

1 x

2 x

As opposed to the DATA function, the Min/Max function can also be used for temperature measurement.

22 GMC-I Messtechnik GmbH

Control Functions

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

4.5 Measurement Data Recording (METRAHIT EXTRA only) The METRAHIT E

XTRA is capable of recording measurement data

using an adjustable sampling rate for long periods of time in the form of measurement series. 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.

Stored measured values can subsequently be read out with the help of METRAwin 10 software. The only prerequisite is a PC which is connected by means of an interface cable to the USB X-TRA bi-directional interface adapter, which is in turn plugged onto the

METRAHIT E

XTRA. See also chapter 7, “Interface Operation”.

Memory Parameters Overview (METRAHIT EXTRA only)

Parameter Page: header

CLEAr EMpty 0CCvP rAtE StArt StoP

24: Clear Memory 24: Clear Memory – appears after CLEAr

24: Querying Memory Occupancy

48: rAtE – set the sampling rate (METRAHIT EXTRA only)

23: Starting Recording via Menu Functions

24: Ending Recording

The STORE Menu Function

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

parameter in chapter 6.4) , and then start memory mode operation.

➭ First select the desired measuring function and an appropriate

measuring range.

➭ Check the battery charge level before starting long-term

measurement recordings (see chapter 6.3). Connect the NA X-TRA power pack if required.

Starting Recording via Menu Functions

➭ Switch to the “SET ” mode by pressing MEASURE | SETUP and se-

lect the “StorE ” menu.

1nFo

 ...  StorE 000.0%  StArt

➭ Memory mode operation is started by pressing FUNC | ENTER.

STORE appears underneath the analog display and indicates

that memory mode operation has been activated. “StoP ” appears at the digital display.

➭ Press MEASURE | SETUP in order to return to the measuring

function.

GMC-I Messtechnik GmbH 23

Control Functions

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

During Recording

STORE is displayed underneath the analog display during memory

mode operation, and

 000.3%

StoP

memory occupancy

can be controlled:

The following message appears as soon as memory is full: “100.0%”.

In order to be able to observe measured values during recording, switch to the measuring function by pressing MEASURE | SETUP. The display is returned to the memory menu after once again pressing MEASURE | SETUP.

A new memory block is created when another measuring function is selected with the rotary switch or the FUNC | ENTER key. Data storage then continues automatically.

Ending Recording

➭ “StoP ” appears at the display after pressing MEASURE | SETUP.

StoP start

➭ Acknowledge the “StoP ” display by pressing FUNC | ENTER.

STORE is cleared from the display, indicating that recording has

been ended.

➭ Press MEASURE | SETUP in order to return to the measuring

function.

➭ Memory mode operation can also be exited by switching the

multimeter off.

Querying Memory Occupancy

Memory occupancy can be queried during recording with the help of the “1nFo ” menu (see also chapter 6.3).

Memory occupancy range: 000.1% to 099.9%.

1nFo



bAtt: 

... 

0CCvP

017.4

Memory occupancy can be queried before recording is started via the “StorE” menu.

 ...  StorE 017.4 %  StArt

1nFo

Clear Memory

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

operation.

 ...  StorE 017. 4% w StArt

1nFo

 CLEAr empty

24 GMC-I Messtechnik GmbH

Control Functions

GMC-I Messtechnik GmbH 25

V/Hz, , Temperature, and A/Hz Measurements

5 Measurements

5.1 Voltage Measurement

Notes Regarding Voltage Measurement

• The multimeter may only be operated with installed batteries or rechargeable batteries. 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 contact 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 only gripped up to the finger

Do not touch the metallic test probes under any

guard. circumstances.

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

• Maximum permissible voltage (METRA HIT E

METRAHIT ETECH, METRAHIT EBASE)

between the connector sockets, (9 and 10) and ground (8) is 1000 V for measuring category I I I, and 600 V for measuring category IV.

• Maximum permissible voltage (METRA HIT E

between the connector sockets (9 and 10) and ground (8) is 600 V for measuring category II.

• 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).

XTRA,

SPECIAL)

• 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.

Scope of Functions, Voltage Measurement

Function

V AC / Hz TRMS, dB (Ri  9 M)

V AC / LP filter 1 kHz (Ri = 1 M2)) TRMS

V AC+DC TRMS (Ri  9 M)

V DC (Ri  9 M)

MHz at 5 V AC

Duty cycle as %

Frequency bandwidth

A 1 kHz low-pass filter can be used in this case, in order to filter out high frequency pulses of greater than 1 kHz, for example when performing measurements at pulsed motor drives.

Input resistance of approx. 1 M. Erroneous displays resulting from capacitive coupling during voltage measurement in power supply systems are reduced to a minimum in this way.

METRAHIT E

XTRA

100kHz 20kHz 20kHz 1kHz

METRAHIT E

TECH



—



  ———  ———

METRAHIT E

SPECIAL

METRAHIT E

BASE

26 GMC-I Messtechnik GmbH

5.1.1 Direct and Pulsating Voltage Measurement, V DC and V (DC+AC)

Note

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

COM

V Tem p



– (+)

+ (–)

V= : 600 mV1000 V

020.00

TRMS

020.00

> 55 V AC or > 70 V DC:

> 1000 V:

Warnings regarding dangerous voltage:

Max. 1000 V (< 10 kHz)

V: 600 mV1000 V

Max. 100 V (> 10 kHz)

Measuring Ranges:

230.0

FUNC

ENTER

max

= 6 x 106 V x Hz

für U > 100 V

The following must be observed for all multimeters except for the METRAHIT E

Set the CL iP parameter to 0FF in the current clamp setup menu. Otherwise all measured values are displayed in amperes, and are corrected by the amount resulting from the selected transformation ratio for an interconnected current clamp sensor.

➭ In accordance with the voltage to be measured, turn the rotary

switch to V or V

➭ Connect the measurement cables as shown.

The “” connector jack should be grounded.

BASE:

1nFo  ...  SET rAtE  ...  CL IP

1 / 10/100/1000 / 0ff

V/Hz, , Temperature, and A/Hz Measurements

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

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!

With the rotary switch in the V position, the multimeter is always set to the 6 V measuring range immediately after it is switched on. As soon a the MAN / AUTO key is pressed, and assuming the measured value is less than 600 mV, the multimeter is switched to the mV measuring range.

GMC-I Messtechnik GmbH 27

V/Hz, , Temperature, and A/Hz Measurements

Note

Attention!

1 kHz

5.1.2 Alternating Voltage Measurement with 1 M Load Resistance

and Frequency Measurement with Selectable Low-Pass Filter (METRAHIT EXTRA, METRAHIT ETECH and METRAHIT E

The measuring instrument includes a V electricians with an input resistance of approximately 1 M.

SPECIAL only)

switch position for

1M

Erroneous displays resulting from capacitive coupling during voltage measurement in power supply systems are reduced to a minimum in this way.

For all multimeters except the METRAHIT EBASE: see note in chapter 5.1.1.

➭ In accordance with the voltage to be measured, turn the rotary

switch to V~

or .

1M

➭ Connect the measurement cables as shown.

The “” connector jack should be grounded.

Voltage Measurement

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

➭ You can switch back and forth between voltage measurement

with and without low-pass filter.

➭ Press the FUNC | ENTER multifunction key repeatedly until unit of

measure V or V/Fil appears at the display.

Frequency Measurement

➭ Apply the measured quantity is the same way as for voltage

measurement.

➭ Manually select the measuring range for the voltage amplitude.

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

➭ Press the FUNC | ENTER multifunction key repeatedly until unit of

measure Hz appears at the display. Lowest measurable frequencies and maximum allowable voltages are included in chapter 8, “Technical Data”.

Measurement with Low-Pass Filter

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.

A 1 kHz low-pass filter can be activated if required, in order to filter out high frequency pulses of greater than 1 kHz, for example when performing measurements at pulsed motor drives, i.e. undesired voltages of greater than 1 kHz can be suppressed.

The active low-pass filter is indicated by the Fil display. The multimeter is automatically switched to manual measuring range selection.

28 GMC-I Messtechnik GmbH

COM

V Tem p



Max. 1000 V (< 10 kHz)

V~: 600 mV1000 V

Hz: 1Hz  300 kHz

Max. 100 V (> 10 kHz)

max

= 6 x 106 V x Hz

Measuring Ranges:

> 55 V AC or > 70 V DC:

> 1000 V:

Warnings regarding dangerous voltage:

230.0

for U > 100 V

1M

1kHz

0225.6

TRMS

1kHz

0226.0

TRMS

Fil

049.99

V~ & Filter

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

V/Hz, , Temperature, and A/Hz Measurements

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 55 V AC or 70 V DC, a danger symbol appears at the display: .

GMC-I Messtechnik GmbH 29

V/Hz, , Temperature, and A/Hz Measurements

Note

Attention!

5.1.3 Alternating Voltage and Frequency Measurement V AC and Hz with Selectable Low-Pass Filter (METRAHIT EXTRA, METRAHIT ETECH and METRAHIT E

SPECIAL only)

For all multimeters except the METRAHIT EBASE: see note in chapter 5.1.1.

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

turn the rotary switch to V~ or Hz.

➭ Connect the measurement cables as shown.

The “” connector jack should be grounded.

Voltage Measurement

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

➭ You can switch back and forth between voltage measurement

with and without low-pass filter.

➭ Press the FUNC | ENTER multifunction key repeatedly until unit of

measure V or V/Fil appears at the display.

Frequency Measurement

➭ Apply the measured quantity is the same way as for voltage

measurement.

➭ Manually select the measuring range for the voltage amplitude.

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

➭ Press the FUNC | ENTER multifunction key repeatedly until unit of

measure Hz appears at the display. Lowest measurable frequencies and maximum allowable voltages are included in chapter 8, “Technical Data”.

Measurement with Low-Pass Filter

The active low-pass filter is indicated by the Fil display. The multimeter is automatically switched to manual measuring range selection.

The specified measuring accuracy is not achieved when the filter is activated and signals are greater than 100 Hz.

30 GMC-I Messtechnik GmbH

COM

V Tem p



Max. 1000 V (< 10 kHz)

V~: 600 mV1000 V

Hz: 1Hz  300 kHz

Max. 100 V (> 10 kHz)

max

= 6 x 106 V x Hz

Measuring Ranges:

> 55 V AC or > 70 V DC:

> 1000 V:

Warnings regarding dangerous voltage:

230.0

for U > 100 V

0230.6

TRMS

050.03

0229.6

TRMS

Fil

V~ & Filter

1kHz

050.00

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

TRMS

Voltage Comparator for Displaying Dangerous Voltage

GMC-I Messtechnik GmbH 31

V/Hz, , Temperature, and A/Hz Measurements

Note

------log=

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

Alternating Voltage Level Measurement (dB)

Voltage level measurement is used in order to ascertain overall attenuation or boosting of a transmission system (shown here as a 4-pole setup).

Voltage level [dB]

where U Result > 1: boosting Result < 1: attenuation

➭ Manually select the measuring range for the voltage amplitude.

➭ Repeatedly press the FUNC | ENTER multifunction key until unit

The level measurement function is now activated. The measured value is calculated based upon the RMS value of the alternating voltage component relative to the measuring range (600 mV 1000 V), and displayed.

The default setting for th reference level is 0 dB = 0,775 V (1 mW to 600 ). This value can be adjusted in the „SET “ menu (see also chapter 6.4):

= U

(reference level)

REF

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

of measure dB appears at the display. Lowest measurable frequencies and maximum permissible voltages are included in chapter 8, “Technical Data”.

No terminal resistors have been integrated into the device. It performs measurement with a high input impedance of 9M. Input impedance for voltage measurement is listed under technical data. In order to be able to perform correct measurement at nonterminated devices under test, the terminating resistor must be connected to the terminals. Be sure to take power loss at the terminating resistor into consideration!

 ...  SET rAtE  ...  dbrEF

1nFo

0 .. 001 ... 99 V

32 GMC-I Messtechnik GmbH



5.1.4 Frequency and Duty Cycle Measurements

Attention!

Note

duty cycle (%) =

pulse duration (t

)

pulse period (t

)

 100

COM

V Tem p



Max. 5 V

1.0323

MHz

002.00

MHz

tE/t

Pulse Time Quantities

pulse frequency = 1/tP

pulse duration

pulse period

– tEinterpulse period

E/tP

pulse or duty cycle

FUNC

ENTER

Measuring Ranges:

fp pulse frequency range

Hz t

E/tP

15 Hz ... 1 kHz 2 ... 98 %

... 10 kHz 5 ... 95 %

... 50kHz 10 ... 90 %

(METRAHIT E

➭ Set the rotary switch to MHz or %. ➭ Connect the measurement cables as shown.

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

The applied signal voltage may not exceed 5 V.

XTRA only)

V/Hz, , Temperature, and A/Hz Measurements

Frequency Measurement, MHz

A 5 V signal with a frequency of up to 1 MHz is measured and displayed using MHz as a unit of measure. Pulse frequency demonstrates the reciprocal value of pulse period.

Duty Cycle Measurement, t

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

GMC-I Messtechnik GmbH 33

E/tP

The applied frequency must remain constant during duty cycle measurement.

V/Hz, , Temperature, and A/Hz Measurements

Note

COM

V Tem p



0V !



000.00



600   60 M

Measuring Ranges:

5.2 Resistance Measurement, 

➭ Disconnect supply power from the electrical circuit of the

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

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

Interference voltages distort measurement results! Refer to chapter 5.1.1 regarding testing for the absence of voltage with the help of the direct voltage measurement.

➭ Set the rotary switch to “”. ➭ Connect the device under test as shown.

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

Improving Accuracy by means of Zero Balancing

Cable resistance and contact resistance can be eliminated in all measuring ranges by means of zero balancing (see chapter 4.2).

34 GMC-I Messtechnik GmbH

5.3 Continuity Test

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

COM

V Tem p



0V !

000.8



0.443

R < 1, 10, 20 ... 500 

FUNC

ENTER

➭ Disconnect supply power from the electrical circuit of the

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

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

Interference voltages distort measurement results!

➭ Set the rotary switch to . ➭ Connect the conductor path under test as shown.

V/Hz, , Temperature, and A/Hz Measurements

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

“0L” appears at the display in the case of an open connection. The limit value can be adjusted in the “SETUP” menu (see also

chapter 6.4):

1nFo

1, 10, 20 ... 500 

(10 = default setting)

GMC-I Messtechnik GmbH 35

 ...  SET rAtE  ...  bEEP

in 10 Ohm steps



V/Hz, , Temperature, and A/Hz Measurements

Note

COM

V Tem p



Forward Direction Reverse Direction

0V !

0.654

0.L

to 6.000 V

Measuring Range:

–

0.443

000.8



FUNC

ENTER

5.4 Diode Testing with a Constant Current of 1 mA

➭ Disconnect supply power from the electrical circuit of the

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

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

Interference voltages distort measurement results! Refer to chapter 5.1.1 regarding testing for the absence of voltage with the help of the direct voltage measurement.

➭ Set the rotary switch to . ➭ Press the ➭ Connect the device under test as shown.

Conducting 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 6.0 V, several series connected components or reference diodes can be tested with a small reference voltage and reference diodes.

Reverse Direction and Interruption

The measuring instrument indicates overload 0L.

FUNC

| ENTER

key.

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

36 GMC-I Messtechnik GmbH

5.5 Temperature Measurement

Note

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

Te mp

0023.3



Tem p

RTD

Typ e K

COM

V Tem p



0256.0



Pt1000

RTD

Measuring Range

TC K (NiCr-

Ni)

–250.0  +1372.0C

FUNC

ENTER

Temperature measurement is performed with a type K thermocouple (accessory), which is connected to the voltage input. Alternatively, a Pt100 or Pt1000 resistance sensor can be used with the METRAHIT EXTRA and

METRAHIT E

TECH.

V/Hz, , Temperature, and A/Hz Measurements

The internal reference temperature (temperature of the internal reference junction) is measured by a temperature sensor inside of the instrument. This may deviate from 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

 ...  tEMP °C / °F 

1nFo

(°C = default setting)

5.5.1 Measurement with Thermocouples, Temp TC

➭ Set the rotary switch to “Temp

➭ The reference temperature is measured at the internal

GMC-I Messtechnik GmbH 37

METRAHIT EXTRA and METRAHIT ETECH only: The last selected temperature measurement or the last selected temperature sensor, i.e. type K or Pt100/Pt1000, remains in memory and is accordingly displayed. Press the FUNC | ENTER key in order to change to the other measuring function if required.

reference junction (see parameter “1tEMP ” in chapter 6.3 regarding querying).

”.

➭ Connect the sensor to the two accessible jacks. The instru-

ment displays the measured temperature using the selected unit of measure.

V/Hz, , Temperature, and A/Hz Measurements

COM

V Tem p



Te mp

0023.3



Te mp

RTD

Typ e K

0025.6



Pt1000

RTD

000.00



Short Leads

R L

Enter Cable Resistance

Automatic

RTD

Compensation

Measuring Ranges

RTD Pt100 –200.0  + 850.0C RTD Pt1000 –150.0  + 850.0C

FUNC

ENTER

FUNC

ENTER

ZERO

ESC

ZERO

ESC

FUNC

ENTER

000.50



R L

5.5.2 Measurement with Resistance Sensors (METRAHIT E

➭ Set the rotary switch to “TempTC” or “Temp The last selected temperature measurement or sensor, i.e. type K

or Pt100/Pt1000, remains in memory and is accordingly displayed. Press the FUNC | ENTER key in order to change to the other measuring function if required. The sensor type, i.e. Pt100 or Pt1000, is detected automatically and displayed.

There are two different ways to compensate for cable resistance:

Automatic Compensation

➭ Press the ZERO | ESC key.

If you prefer to enter cable resistance directly, you can skip the following entry prompt.

➭ Short circuit the measuring instrument’s connector cables.

Entering Cable Resistance

➭ Press the ZERO | ESC key once again in the automatic

➭ Enter the known resistance of the connector cables with the

➭

38 GMC-I Messtechnik GmbH

“Short leads” appears at the display.

“000.00 ” appears at the display. After pressing the FUNC | ENTER key, automatic compensation of cable resistance is activated for all subsequent measurements. The short-circuit can now be eliminated, and the device is ready for use.

compensation menu.

scroll keys: Select the digit to be changes with the and change the respectively selected digit with the The default value is 0.43  (Z3409). Values can be selected within a range of 0 to 50 . Upon pressing the the display is returned to the measuring function. Cable resistance remains in memory even after the instrument has been switched off.

XTRA

and METRAHIT E

FUNC | ENTER

key, the selected value is activated and

TECH

only)

RTD

”.

 keys,

keys.

5.6 Capacitance Measurement

Note

COM

V Tem p



0V !

10.38

–



60 nF ...600 F

Measuring Ranges:

(METRAHIT E

➭ Disconnect supply power from the electrical circuit of the

device 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 chapter 5.1.1 regarding testing for the absence of voltage with the help of the direct voltage measurement.

➭ Set the rotary switch to “ ”. ➭ Connect the (discharged!) device under test to the sockets

with the measurement cables as shown.

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

XTRA and METRAHIT ETECH only)

V/Hz, , Temperature, and A/Hz Measurements

GMC-I Messtechnik GmbH 39

V/Hz, , Temperature, and A/Hz Measurements

5.7 Current Measurement

Notes Regarding Current Measurement

• The multimeter may only be operated with installed batteries or

rechargeable batteries. Dangerous currents are otherwise not indicated, and the instrument may be damaged.

The METRAHIT ESPECIAL multimeter does not have a fuse for the cur-

•

rent measuring range. It’s designed for measurements in current transformer circuits and is approved for measuring category 600 V

CAT II

• 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.

• An intermittent acoustic signal warns of current greater than 10 A.

Scope of Functions, Current Measurement, Direct Connection

Function METRAHIT

A AC / Hz ~ 600 A

A AC+DC TRMS

A DC 600 A

1000 V fuse

* ) Special model without fuse for measuring-current transformer

XTRA

6/60/600 mA

6 A / 10 (16) A

600 A

6/60/600 mA

6 A / 10 (16) A

6/60/600 mA

6 A / 10 (16) A

METRAHIT

TECH

60/600 mA

6 A / 10 (16) A

60/600 mA

6 A / 10 (16) A

60/600 mA

6A / 10 (16) A

—* ) —

METRAHIT

SPECIAL

6 A / 10 (16) A

METRAHIT

BASE

—

An continuous acoustic signal warns of current greater than 16 A.

• 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! The fuse must have a

capacity of at least 30 kA

• If the fuse for the active current measuring range blows, “

breaking

FUSE

appears at the digital display, and an acoustic signal is generated at the same time.

• If a fuse should blow, eliminate the cause of overload before plac-

ing the instrument back into service!

• Fuse replacement is described in chapter 9.3.

• Be absolutely certain that the measuring ranges are not

overloaded beyond their allowable capacities. Limit values are included in chapter 8, “Technical Data”, in the table entitled “Meas-

Scope of Functions, Current Measurement via Current Clamp Sensors

”

Function METRAHIT

Transformation Factor

A AC / Hz

A AC+DC

A DC

Hz (A AC)

EXTRA

... 60 kHz ... 60 kHz ... 60 kHz ... 60 kHz

METRAHIT ETECH



  

METRAHIT ESPECIAL

Scope of Functions for Current Measurement with Current Clamps Transformer

Function METRAHIT EXTRA METRA HIT ETECH METRA HIT ESPECIAL Transformation Factor A AC / Hz Hz (A AC)

   

... 60 kHz ... 60 kHz ... 60 kHz

METRAHIT EBASE

uring Functions and Measuring Ranges” in the “Overload Capacity” column.

40 GMC-I Messtechnik GmbH

5.7.1 Direct and Pulsating Current Measurement, Direct Connection,

COM mA A

I > 10 A

003.50

TRMS

METRAHIT EXTRA

METRAHIT ESPECIAL

6 A / 10 A (16 A max. 30 s)

600 A / 6 mA 60 mA / 600 mA 6 A / 10 A (16 A max. 30 s)

8.8.8.8.8

I > 16 A

Strom

Measuring Ranges:

Current measurement may only be performed with installed batteries!

FUNC

ENTER

METRAHIT ETECH

60 mA / 600 mA 6 A / 10 A (16 A max. 30 s)

A DC and A (DC+AC) (METRAHIT E METRAHIT E

➭ First disconnect supply power from the measuring circuit or

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

➭ In accordance with the current to be measured, turn the rotary

➭ Select the current type appropriate for the measured quantity

➭ Safely connect the measuring instrument (without contact

➭ Switch supply power to the measuring circuit back on (3). ➭ Read the display. Make a note of the measured value if the

➭ Disconnect supply power from the measuring circuit or the

➭ Remove the test probes from the measuring point and return

switch to A or A .

by briefly pressing the FUNC | ENTER multifunction key. Each time the key is pressed, the instrument is switched back and forth between A DC and A (DC + AC) by means of an acoustic signal. The current type is indicated at the LCD by means of the DC or the (DC+AC)

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

instrument 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.

XTRA, METRAHIT ETECH and

SPECIAL only)

, which is indicated

TRMS

symbol.

TRMS

V/Hz, , Temperature, and A/Hz Measurements

GMC-I Messtechnik GmbH 41

V/Hz, , Temperature, and A/Hz Measurements

COM mA A

003.50

TRMS

050.10

8.8.8.8.8

I > 10 A

I > 16 A

Strom

FUNC

ENTER

METRAHIT EXTRA

METRAHIT ESPECIAL

6 A / 10 A (16 A max. 30 s)

600 A / 6 mA 60 mA / 600 mA 6 A / 10 A (16 A max. 30 s)

Measuring Ranges:

METRAHIT E

TECH

60 mA / 600 mA 6 A / 10 A (16 A max. 30 s)

Current measurement may only be performed with installed batteries!

5.7.2 Alternating Current and Frequency Measurement, Direct Connection, A AC and Hz (METRAHIT EXTRA, METRAHIT ETECH and METRAHIT E

➭ First disconnect supply power from the measuring circuit or

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

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

turn the rotary switch to A~ or Hz.

➭ Select the desired measured quantity by briefly pressing the

FUNC | ENTER multifunction key. Each time the key is pressed, AC

TRMS

switching is acknowledged with an acoustic signal.

➭ Safely connect the measuring instrument (without contact

resistance) 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

instrument 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.

SPECIAL only)

and Hz are alternately selected, and

42 GMC-I Messtechnik GmbH

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

COM

V Tem p



Current

003.50

1:1000

003.50

1:1000

TRMS

FUNC

ENTER

Ri = 9 M



COM

V Tem p



Current

Ri ~ 1 M



METRAHIT EBASE

METRAHIT EXTRA,

METRAHIT ETECH, METRAHIT E

SPECIAL

METRAHIT EXTRA, METRAHIT E

TECH,

METRAHIT E

SPECIAL

V/Hz, , Temperature, and A/Hz Measurements

5.7.3 Direct and Pulsating Current Measurement

with Current Clamp Sensors, A DC and A (DC+AC)

Transformer Output, Voltage/Current

When a current clamp sensor is connected to the multimeter (V input (

METRAHIT EBASE

the correct value in accordance with the selected transformation factor. The only prerequisite is that the current sensor is equipped with at least one of the below listed transformation factors, and that the factor has been previously selected in the following menu ( see also chapter 6.4.

Current Clamp Setup Menu

1nFo

1 / 10/100/1000 / 0ff 

Trans. Factors

CL IP

1:1

1mV/1mA

1:10

1mV/10mA

1:100

1mV/100mA

1:1000

1 mV/1 A

Maximum allowable operating voltage is equal to the current transformer’s nominal voltage. When reading the measured value, additional error resulting from the current clamp sensor must also be taken into consideration.

(default setting:

METRAHIT E

GMC-I Messtechnik GmbH 43

Measuring Ranges DMM Clamp Types

METRAHIT E

SPECIAL

: V input)), all current displays appear with

 ...  SET rAtE  ...  CLIP

600 mV 6 V

600.00 mA 6.0000 A

6.0000 A 60.000 A

60.000 A 600.00 A

600.00 A 6000.0 A

OFF, METRAHIT E

XTRA

METRAHIT E

BASE

1:1000

1:1

1mV/1mA

1:10

1mV/10mA

1:100

1mV/100mA

1:1000

1 mV/1 A

TECH

)

Cl ip ?

0FF

V/Hz, , Temperature, and A/Hz Measurements

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

003.50

TRMS

1:1000

050.10

1:1000

FUNC

ENTER

COM

V Tem p



Current

Ri ~ 1 M



METRAHIT EBASE

COM

V Tem p



Current

Ri = 1 M9 M



METRAHIT EBASE

1M

1kHz

Ri = 1 M



Ri = 9 M



METRAHIT EXTRA, METRAHIT E

TECH,

METRAHIT E

SPECIAL

METRAHIT EXTRA, METRAHIT E

TECH,

METRAHIT E

SPECIAL

5.7.4 Alternating Current Measurement with Current Clamp Sensors, A AC and Hz

Transformer Output, Voltage/Current

When a current clamp sensor is connected to the multimeter (V input (

METRAHIT E

0FF

), see also chapter 6.4.

Current Clamp Setup Menu

1nFo

1 / 10/100/1000 / 0ff

Trans. Factors

CL IP

1:1

1mV/1mA

1:10

1mV/10mA

(default setting:

METRAHIT E

44 GMC-I Messtechnik GmbH

1:100

1mV/100mA

1:1000

1 mV/1 A

SPECIAL

BASE

: V input)), all current displays appear with

 ...  SET rAtE  ...  CLIP

Measuring Ranges DMM Clamp Types

600 mV 6 V

600.00 mA 6.0000 A

6.0000 A 60.000 A

60.000 A 600.00 A

600.00 A 6000.0 A

METRAHIT E

OFF, METRAHIT E



XTRA

METRAHIT E

BASE

1:1000

1mV/1mA

1mV/10mA

1mV/100mA

1:1000

1 mV/1 A

TECH

)

1:1

1:10

1:100

Cl ip 

5.7.5

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

COM

V Tem p



Current

1:1000

Ri 1



003.50

TRMS

050.10

FUNC

ENTER

1:1000

003.50

TRMS

050.10

FUNC

ENTER

Direct, Pulsating and Current Measurement Transformer A DC, A (DC+AC), A AC and Hz (METRAHIT E METRAHIT E

TECH and METRAHIT ESPECIAL only)

with Current Clamps

XTRA,

Transformer Output, Current/Current

When a current clamps transformer is connected to the multimeter ( mA/A input), all current displays appear with the correct value in accordance with the selected transformation factor. The only prerequisite is that the current transformer is equipped with at least one of the below listed transformation factors, and that the factor has been previously selected in the following menu



0FF), see also chapter 6.4.

Current Clamp Setup Menu

1nFo  ...  SET rAtE  ...  CLIP

(Cl ip

V/Hz, , Temperature, and A/Hz Measurements

Trans. Factors

CL IP

1:1

1mA/1mA

1:10

1mA/10mA

1:100

1mA/100mA

1:1000

1 mA/1 A

1 / 10/100/1000 / 0ff 

Measuring Ranges DMM Clamp Types

60 mA AC 600 mA AC 6 A AC

60.000 mA 600.00 mA 6.0000 A

600.00 mA 6.0000 A 60.000 A

6.0000 A 60.000 A 600.00 A

60.000 A 600.00 A 6000.0 A

WZ12A, WZ12D, WZ11A, Z3511, Z3512, Z3514

(default setting: Cl ip 0FF)

GMC-I Messtechnik GmbH 45

Device and Measuring Parameters

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

6 Device and Measuring Parameters

The instrument’s “SET ” mode (menu mode) makes it possible to set operating and measuring parameters, query information and activate the interface.

➭ The menu mode is accessed by pressing the MEASURE | SETUP

key, assuming that the instrument is switched on and set to “Measure” (measuring mode operation). “1nFo ” appears at the display.

➭ The main menus, i.e. the „SETUP “, „tEMP “ and „SEnd “ menus,

as well as the “StorE ” menu included with the

METRAHIT E

“1nFo” by activating the

➭ After selecting the desired main menu, sub-menus are

accessed by pressing the FUNC | ENTER key.

➭ The desired parameter is selected by repeatedly pressing the

 or  key.

➭ In order to check or change a parameter, acknowledge it with

the FUNC | ENTER key.

➭ The

position. The desired value is selected with the help of the

➭ Changes can only be accepted with the FUNC | ENTER key.

➭ You can return to the sub-menu without making any changes

by pushing the ZERO | ESC key, and to the main menu by pressing the same key once again etc.

➭ You can switch to the measuring mode from any menu level by

pressing the FUNC | ENTER key.

XTRA, are accessed, and the display is returned to

  keys (in any direction).

  keys can be used to position the cursor at the entry

 keys.

After repeatedly pressing the MEASURE | SETUP key (without first turning the multimeter off), you can return to the last selected menu or parameter from the measuring mode.

Example: Setting Time

 ...  set rAte  ...  t iME

1nFo

10:24 (hh:mm)

 

Setting hours and minutes:

   Change the setting, the entry position blinks.

Advance to desired entry position.

Press and hold the key

to change the setting rapidly.

The new time setting is activated after acknowledgement.

46 GMC-I Messtechnik GmbH

Device and Measuring Parameters

bAtt: uerSion

1tEMP: dAtE: t iME: 0CCvP: *

1nFo

SEnd

SET

StorE

Sampling rate

* METRAHIT E

XTRA only

StArt

StoP

000.0

CLEAr StArt/

StoP

Sub-Menus/Parameters 

rAtE

nofil

rESoL 0

.diSP

CLiP

APoFF

dB REF

bEEP

irStb

Addr

dAtE

tiME

Main Menus 

Query

Set

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

1nfo

MEASURE

SETUP

020.00

TRMS

Selection

FUNC

ENTER

Selection

FUNC

ENTER

Selection

FUNC

ENTER

tEMP

C F

Set

FUNC

ENTER

Selection

FUNC

ENTER

6.1 Paths to the Various Parameters 6.2 List of All Parameters

GMC-I Messtechnik GmbH 47

Parameter

XTRAETECHESPE

CIAL

BASE

Page: Header

0.diSP 49: 0.diSP – show/hide leading zeros Addr

 ———

53: Configuring Interface Parameters

A.diSP 49: A.diSP – analog display: select display mode APoFF

bAtt bEEP CLEAr

CLIP

dAtE dBrEF EMpty

1nfo irStb 1tEMP

nofil 48: noFiL – quick display of measured values

0CCvP rAtE rESoL SEnd SET StArt StoP store tEMP t iME vErSion

 

  ———

 

49: dbrEF – measuring alternating voltage level  ——— 

 ——— 

 ———  ———   ———   ———  ———  ———   

49: APoFF – specified time for automatic shutdown and continuous ON

48: bAtt – query battery voltage 50: bEEP – set the limit value for continuity testing 23: Measurement Data Recording (METRAHIT E

only) 43:

Direct and Pulsating Current Measurement with

Current Clamp Sensors, A DC and A (DC+AC) 48: dAtE – query date, 50: dAtE – enter date

23: Measurement Data Recording (METRAHIT E only)

48: Querying Parameters – InFo Menu (as moving letters) 53: Configuring Interface Parameters 48: ItEMP – query reference temperature

23: Measurement Data Recording (METRAHIT E 48: rAtE – set the sampling rate (METRA HIT E 49: rESoL – switching resolution 52: Activating the Interface 48: Entering Parameters – SETUP Menu

23: Measurement Data Recording (METRAHIT E only)

37: Temperature Measurement 48: tiME – query time, 50: tiME – set time 48: vErSion – query firmware version

XTRA

only)

XTRA

Device and Measuring Parameters

MEASURE

SETUP

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

6.3 Querying Parameters – InFo Menu (as moving letters)

bAtt – query battery voltage

1nFo bAtt

2.75 V.

vErSion – query firmware version

1nFo bAtt:  vErSion: 2.09

ItEMP – query reference temperature

The temperature of the internal reference junction is measured with a temperature sensor in close proximity to the input sockets.

1nFo bAtt:  ... 

1tEMP: 24 °

dAtE – query date

1nFo bAtt:  ... 

D = day, M = month, Y = year

dAtE: 31.12.

05 (DD.MM.YY)

Date and time must be reentered after replacing the batteries.

tiME – query time

1nFo bAtt

t iME: 13:46:

: 

... 

(hh:mm:ss)

h = hours, m = minutes, s = seconds

Date and time must be reentered after replacing the batteries.

6.4 Entering Parameters – SETUP Menu

rAtE – set the sampling rate (METRAHIT EXTRA only)

The sampling rate specifies the time interval after which the respective measured value is transmitted to the interface, or to measured value memory.

Any one of the following rates can be selected: 00:00.1, 00:00.2, 00:00.5, 00:01.0, 00:02.0, 00:05.0 [h:mm:ss.t] (h = hours, m = minutes, s = sec.,

t = tenths of a sec.

)

0:00:10, 0:00:20, 0:00:30, 0:00:40, 0:00:50, 0:01:00, 0:02:00, 0:05:00, 0:10:00, 0:20:00, 0:30:00, 0:40:00, 0:50:00, 1:00:00, 2:00:00, 3:00:00, 4:00:00, 5:00:00, 6:00:00, 7:00:00, 8:00:00, 9:00:00

Setting the Sampling Rate

1nFo



... 

SET rAtE

00:00.1 ... 00:00.5 ... 9:00:00 

(00:00.5 = 0.5 seconds = default value) The last value is retained.

noFiL – quick display of measured values

For the following functions, a quicker display update rate of 5 display values per second (noFiL=ON) instead of 2 display values per second (noFiL=OFF) can be set:



, diode measurement, continuity test.

rect,

VDC, ADC with clamp, ADC di-

OCCUP – query memory occupancy (METRA HIT EXTRA only)

: 

... 

0CCUP:

1nFo bAtt

000.0

1nFo



... 

SET rAtE  ...  nofil

on / 0ff

(OFF =

Standard value*/default setting)

* All specifications refer to the default update rate with measuring para-

meter noFiL = OFF (default).

48 GMC-I Messtechnik GmbH

rESoL – switching resolution

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

All main measuring functions can be switched back and forth between 6000 and 60,000 digits.

1nFo

 ...  SET rAtE  ...  resol

6000 / / 60000



(60,000 is the default setting)

0.diSP – show/hide leading zeros

This parameter determines whether or not leading zeros will appear in the measured value display.

1nFo



... 

SET rAtE  ...  0.diSP

0000.0 : with leading zeros (default setting)

0.0 : leading zeros suppressed



A.diSP – analog display: select display mode

One of two different display modes can be selected for the analog display:

• bArG: bar graph

• Point: pointer

Device and Measuring Parameters

 ...  SET rAtE  ...  A.diSP

1nFo

bArG / Point

(bArG = default value)

APoFF – specified time for automatic shutdown and continuous ON

The instrument is switched off automatically if the measured value remains unchanged for a long period of time, and if none of the keys or the rotary switch have been activated before the specified time “APoFF ” (entered in minutes) has elapsed.

If the on setting is selected, the multimeter is set to continuous operation and

ON appears in the display to the right of the battery

symbol. In this case, the multimeter can only be switched off manually. The „on “ setting can only be cancelled by changing the respective parameter, or by switching the instrument off manually. In this case, the parameter is reset to 10 minutes.

1nFo

10 ... 59 min on

(10 minutes = default setting)

dbrEF – measuring alternating voltage level

1nFo

0 .. 001 ... 99 V



 ...  SET rAtE  ...  APoFF



 ...  SET rAtE  ...  dbrEF



(0.775 V = default setting)

GMC-I Messtechnik GmbH 49

Device and Measuring Parameters

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

bEEP – set the limit value for continuity testing

 ...  SET rAtE  ...  bEEP

1nFo

1, 10, 20 ... 500 



(10 = default setting)

irStb – status of the infrared receiver in the stand-by mode

See chapter 7.2 on page 53 regarding settings.

Addr – select device address

See chapter 7.2 on page 53.

dAtE – enter date

Entering the current date makes it possible to acquire measured values in real-time.

 ...  SET rAtE  ...  dAtE

1nFo

31.12 (DD: day . MM: month)

2005 (YYYY: year)

 

Date and time must be reentered after replacing the batteries.

tiME – set time

Entering the correct time makes it possible to acquire measured values in real-time.

1nFo  ...  SET rAtE  ...  t iME

10:24 (hh:mm)  

Date and time must be reentered after replacing the batteries.

CLIP – set transformation factor

See chapter 5.7.3 ff.

50 GMC-I Messtechnik GmbH

6.5 Default Settings

ZERO

ESC

ON / OFF

LIGHT

Previously entered changes can be undone, and the default settings can be reactivated. This may be advisable under the following circumstances:

• After the occurrence of software or hardware errors

• If you are under the impression that the multimeter does not

work correctly

➭ Disconnect the device from the measuring circuit.

➭ Remove the batteries temporarily (see also chapter 9.2).

➭ Simultaneously press and hold

the and keys,

and reinsert the batteries at the same time.

Device and Measuring Parameters

GMC-I Messtechnik GmbH 51

Interface Operation

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

7 Interface Operation

The multimeters are equipped with an infrared interface for the transmission of measurement data to a PC. Measured data are optically transferred through the instrument housing by means of infrared light to an interface adapter (accessory), which is attached to the multimeter. The adapter’s USB interface allows for the establishment of a connection to the PC via an interface cable. Beyond this, commands and parameters can be transmitted from the PC to the multimeter as well. The following functions can be executed:

• Configuration and read-out of measuring parameters

• Measuring function and measuring range selection

• Start measurements

• Read out stored measured values

(METRAHIT E

7.1 Activating the Interface

The interface is automatically activated for receiving operation (multimeter receives data from the PC) as soon as the interface is addressed by the PC, assuming that the “irStb ” parameter has been set to “ir on ” (see chapter 7.2), or the instrument is already switched on (the first command wakes up the multimeter, but does not yet execute any further commands).

The “continuous transmission” operating mode is selected manually as described below. In this operating mode, the instrument continuously transmits measurement data to the PC via the interface adapter. The measured value can then be displayed with the help of a terminal program.

XTRA only)

Starting Continuous Transmission Operation with Menu Functions

 ...  SEnd StArt send

1nFo

The symbol blinks at the display in order to indicate interface operation.

Stopping Continuous Transmission Operation with Menu Functions

1nFo

 ...  SEnd send

stop send

The symbol is cleared from the display.

Automatic Activation and Deactivation of Transmission Mode Operation

If the sampling rate is 10 seconds or longer, the display is switched off automatically between samples in order to prolong battery service life. The only exception is when the multimeter is set to continuous operation. As soon as an event occurs, the display is automatically switched back on.

52 GMC-I Messtechnik GmbH

Interface Operation

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

MEASURE

SETUP

FUNC

ENTER

FUNC

ENTER

FUNC

ENTER

7.2 Configuring Interface Parameters

irStb – status of the infrared receiver in the stand-by mode

There are two possible switching statuses for the infrared interface when the multimeter is switched off:

ir on: IR appears at the display and the infrared interface is

active, i.e. signals such as making commands can be received, and power is consumed even though the multimeter is switched off.

ir oFF: IR does not appear at the display and the infrared

interface is switched off, signals cannot be received.

 ...  SET rAtE  ...  irStb

1nFo

ir on / ir oFF 

(irstb = ir on = default setting, irstb = ir oFF = status upon shipment)

Addr – Address

If several multimeters are connected to the PC via an interface adapter, a separate address can be assigned to each instrument. Address number 1 should be selected for the first instrument, 2 should be assigned to the second and so forth.

1nFo

 ...  SET rAtE  ...  Addr

00 ... 01 ... 15



(15 = default setting)

GMC-I Messtechnik GmbH 53

Technical Data

XTRA

ESPECIAL

TECH

8 Technical Data

Meas.

Measuring Range

600 mV 10 V 100 V 9M9M // < 50 pF 0.09 + 5 mit ZERO *) 0.5 + 30 1 + 30

6 V 100 V1mV  9M9M // < 50 pF 0.05 + 5 0.5 + 9 1 + 30

60 V 1mV 10mV  9M9M // < 50 pF 0.05 + 5 0.5 + 9 1 + 30

600 V 10 mV 100 mV 9M9M // < 50 pF 0.05 + 5 0.5 + 9 1 + 30

1000 V 100 mV 1 V 9M9M // < 50 pF 0.09 + 5 0.5 + 9 1 + 30

600 mV~

~ –28 dB ... +18 dB

60 V

~ –8 dB ... +38 dB

600 V

~ +2 dB ... +58 dB

1000 V

~ +22 dB ... +63 dB

600 A 10 nA 100 nA 150 mV 150 mV 0.5 + 5 with ZERO *) 1 + 10 1.5 + 30

6 mA 100 nA 1 A 200 mV 200 mV 0.5 + 5 1 + 10 1.5 + 30

60 mA 1 A10A 200 mV 200 mV 0.1 + 5 1 + 10 1.5 + 30

600 mA 10 A 100 A 300 mV 300 mV 0.2 + 5 1 + 10 1.5 + 30

6 A 100 A 1 mA 300 mV 300 mV 0.9 + 10 1 + 10 1.5 + 30

Factor 1:1/10/100/1000

10 A 1 mA 10 mA 600 mV 600 mV 0.9 + 10 1.5 + 10 1.5 + 30

0.06/0.6/6/60 A 60 mA

0.6/6/60/600 A 600 mA 0.7 A continous

6/60/600/6 000 A

0.6/6/60/600 A

6/60/600/6000 A

Function

Resolution at Upper

Range Limit

59 999 5 999

0.01 dB

Voltage drop, approx. at upper range limit

Input Input impedance

6A plus current clamps transformer error

600 mV

XTRA

TECH

BASE

Input Impedance

~ / ~

Display range for reference voltage

REF = 0.775 V

–48 dB ... – 2 dB

XTRA

/ E

SPECIAL

/ E

Current measuring input

(A socket )

/ E

SPECIAL

/ Voltage measurement input

: (V socket) Ri =1 M/9 M : (V socket ) Ri ~1 M

TECH



Intrinsic Error under Reference Conditions for High Resol 59999 digits

(... % rdg. + ... d) (... % rdg. + ... d) (... % rdg. + ... d)

0.1 dB (U > 10 % MB)

Specification see current ranges A

Specification see voltage measuring ranges V~

(0.5% rdg. + 10 d) (1 % rdg. + 30 d) (1. 5% rdg. + 30 d)

plus current clamp sensor error

Intrinsic error

Overload Capacity

Value Time

1000 V

DC AC

continous RMS Sine

1000 V

DC AC

continous RMS Sine

0.7 A continous

10 A:  5 min

16 A:  30 s

Measuring input

10 A: 5 min

Measuring input

1000 V RMS

max. 10 s

54 GMC-I Messtechnik GmbH

Technical Data

Meas.

Function

Measuring Range

Resolution at Upper

Range Limit

59 999 5 999

Open-circuit voltage

Input Impedance

~ / ~

Meas. curr. @ range limit

600  10 m 100 m < 1.4 V approx. 250 A0.1 + 5

6k 100 m 1  < 1.4 V approx. 65 A0.1 + 5



60 k 1  10  < 1.4 V approx. 7.5 A0.1 + 5

600 k 10  100  < 1.4 V approx. 0.75 A 0.2 + 5 ...

6M 100  1k < 1.4 V approx. 0.1 A0.5 + 5

60 M 1k 10 k < 1.4 V approx. 30 nA 5 + 10

Specified accuracy is valid as of 3% of the measuring range. With short-circuited test probes: residual value of 1 to 30 d at zero point due to the TRMS converter (exception: mV AC range, 60 digits).

At 0  ... + 40C

Displays up to max. 6.0 V, “OL” in excess of 6. 0 V.

Off-time > 30 min and TA  40 °C

*) without ZERO max.  15 digits

600  —0.1 approx. 9 V approx. 1 mA const. 3 + 5

6.0 V

— 1 mV approx. 9 V approx. 1 mA const. 0.5 + 3

See

frequency influence

on page 57.

Intrinsic Error under Reference Conditions for High Resol 59 999 digits

(... % rdg. + ... d) (... % rdg. + ... d) (... % rdg. + ... d)

(... % rdg. + ... d)

with active ZERO function

Overload Capacity

Value Time

1000 V

DC AC

max. 10 s RMS Sine

GMC-I Messtechnik GmbH 55

Technical Data

Meas.

Function

Measuring Range

Resolution at Upper

Range Limit

59999 5999 ~ / Value Time

Input Impedance

Discharge resist. U

60 nF — 10 pF 10 M 0.7 V 1 + 10

600 nF — 100 pF 1 M 0.7 V 1 + 6

6 F — 1 nF 100 k 0.7 V 1 + 6

60 F — 10 nF 12 k 0.7 V 1 + 6

600 F — 100 nF 3 k 0.7 V 5 + 6

XTRA

TECH

Hz (V) Hz (A)

Hz (A )

Hz (V)

MHz

600.00 Hz 0.01 Hz 0.1 Hz

6.0000 kHz 0.1 Hz 1 Hz

60.000 kHz 1 Hz 10 Hz

300.00 kHz 10 Hz 100 Hz 10 Hz

0.01 ...

XTRA

600 Hz ... 1 MHz

100 Hz

0.1 ... 1 kHz

1 ... 100 Hz 0.05 + 5 > 2 V ... 5 V

2.0 ... 98 % — 0.01 % 15 Hz ... 1 kHz 1 Hz 0.1 R + 5 d > 2 V ... 5 V

XTRA

C/F

At 0  ... + 40 C

Applies to measurements at film capacitors and battery operated

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:

5.0 ... 95 % — 0.01 % ... 10 kHz 1 Hz

10... 90 % — 0.01 % ... 50 kHz 1 Hz

– 200.0 ...

Pt 100

+850.0 C

(NiCr-Ni)

– 150.0 ...

+850.0 C

– 250.0 ...

+1372.0 C

0.1 C

V x Hz for U > 100 V

See current measuring ranges for maximum current values.

0 max

min

1Hz

Overload Capaci-

1000 V

AC RMS Sine

max. 10 s

Intrinsic Error under Reference Conditions for

High Resol 59999 digits

(... % rdg. + ... d)

with active ZER O function

(... % rdg. + ... d)

Hz (V) 8):

Hz(A )8):

1000 V

max. 10 s

)

Hz (A):

1000 V max. 10 s

0.2 R per kHz

+5 d

0.5 R per kHz +5 d

0.05 + 5

10)

> 2 V ... 5 V

(... % rdg. + ... d)

11)

0.3 + 15

11)

0.3 + 15

11)

1% + 5 K

10)

Input sensitivity, sinusoidal signal, 10% to 100% of the measuring range

11)

Plus sensor deviation

*) without ZERO Max.  15 digits

1000 V

DC/AC

RMS Sine

max. 10 sPt 1000

Key: R = meas. range, d = digit(s), rdg. = measured value (reading)

56 GMC-I Messtechnik GmbH

Technical Data

Influencing Quantities and Influence Error

Influencing

Quantity

Temperature

With zero balancing

Influencing

Quantity

DATA V A, , Hz, dB, C 10 d MIN / MAX V A, , Hz, dB, C 30 d

Sphere of Influence

0 C ... +21C

and

+25C... +40C

Measuring Quantity

Measured Quantity /

Measuring Range

V 0.2 + 10

V 0.4 + 10

600  ... 6 M 0.5 + 10

> 6 M 1 + 10

mA/A 0.5 + 10

mA/A 0.8 + 10

60 nF ... 600 F1 + 5

Hz, dB 0.2 + 10

C/F (Pt100/Pt1000) 0.5 + 10 C/F thermocouple K 0.2 + 10

Influence Error

(...% rdg. + ... d)

(...% rdg. + ... d) / 10 K

Influence Error

METRAHIT E

Influencing

Quantity

Meas. Quantity/

Meauring Range

Sphere of Influence

 ... % rdg. + ... d)

METRAHIT E METRAHIT E METRAHIT E

Intrinsic Error

XTRA TECH SPECIAL

> 15 Hz ... 45 Hz 3 + 30 3 + 30

600.00 mV

> 65 Hz ... 1 kHz 2 + 30 3 + 30

> 1 kHz ... 20 kHz 3 + 30 —

> 15 Hz ... 45 Hz 2 + 9 3 + 9

Frequency

6.0000 V

600.00 V

1000.0 V

> 65 Hz ... 1 kHz 1 + 9 3 + 9

...

> 1 kHz ... 20 kHz

> 20 kHz ... 100 kHz

3 + 9 —

3.5 + 30 —

> 15 Hz ... 45 Hz 2 + 9 3 + 9

> 65 Hz ... 1 kHz 2 + 9 3 + 9

> 1 kHz ... 10 kHz 3 + 30 —

600.00 A

10.0000 A

600 mV /

6 V / 10 V

Power limiting: frequency x voltage max. 6 x 106 V x Hz for U > 100 V

The accuracy specification for frequency response is valid within a dis-

BASE

> 15 Hz ... 45 Hz

...

> 65 Hz ... 10 kHz

3 + 10 —

> 65 Hz ... 1 kHz — 3 + 30

play value range of 10% to 100% of the measuring range for both measuring modes with the TRMS converter in the AC and (AC+DC) ranges.

METRAHIT EXTRA:

Frequency response up to 100 kHz, > 50 kHz + 2.5%

METRAHIT ETECH: Frequency response up to 20 kHz, METRAHIT E METRAHIT E

SPECIAL: Frequency response up to 20 kHz, BASE: Frequency response up to 1 kHz

BASE

GMC-I Messtechnik GmbH 57

Technical Data

Influencing

Quantity

Crest factor CF

Except for sinusoidal waveshape

Influencing Qty. Sphere of Infl. Measured Quantity Influence Error

Relative humidity

Battery voltage 1.8 to 3.6 V V A, , Hz, dB, C included in intrinsic error

Influencing

Quantity

Common Mode Interference Voltage

Series Mode Interference Voltage

Sphere of Influence

1 ... 3

> 3 ... 5  3% rdg.

75%

3 days

instrument off

Sphere of Influence

Interference quantity max. 1000 V V > 120 dB

Interference quantity max. 1000 V

50 Hz ... 60 Hz, sine

Interference quantity: V ,, respective

nominal value of the meas. range,

max. 1000 V , 50 Hz ... 60 Hz, sine

Interference quantity max. 1000 V V > 110 dB

Measured Quantity /

Measuring Range

V, A

V A, , Hz, dB, C1 x intrinsic error

Measured Quantity /

Measuring Range

6 V , 60 V > 80 dB

Influence Error

 1% rdg.

Damping

600 V > 70 dB

1000 V > 60 dB

V> 50dB

Reference Conditions

Ambient temperature +23C 2K Relative humidity 40 ... 75% Measured qty. frequency 45 ... 65 Hz Measured qty. waveshape sine Battery voltage 3 V 0.1 V

Response Time (after manual range selection)

Measured Quantity /

Measuring Range

V, V, dB

AV , A

600  ... 6 M 2s

60 M 5s

Continuity < 50 ms

C (Pt 100) max. 3 s

60 nF ... 600 Fmax. 2s

>10 Hz 1.5 s

Response Time

Digital Display

1.5 s

Measured Quantity Jump Function

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

Internal Clock

Time format TT.MM.JJJJ hh:mm:ss Resolution 0.1 s Accuracy 1 minute per month Temperature

influence 50 ppm/K

58 GMC-I Messtechnik GmbH

Technical Data

Data Interface

Type Optical via infrared light through the

housing

Data transmission (data transfer) Serial, bidirectional (not IrDa compatible)

Protocol Device specific Baud Rate 38,400 baud Functions – Select/query measuring functions and

parameters

–

Query/transmit momentary measurement data

– Read out stored measurement data

The USB X-TRA plug-in interface adapter (see accessories) is used for adaptation to the PC’s USB port.

Internal Measured Value Storage (METRAHIT EXTRA only)

Memory capacity 16 Mbit (2 MByte) for approx. 60, 000

measured values with time stamp

Power Supply

Battery 2 ea. 1.5 V mignon cell (2 ea. size AA),

alkaline manganese per IEC LR6 (2 ea. 1.2 V NiMH rechargeable battery also possible)

Service life With alkaline manganese: approx. 200

hours

Battery test Battery capacity display with battery

Power OFF function The multimeter is switched off

Power pack connector socket (METRAHIT E only) If the NA X-TRA power pack (see

XTRA

symbol in 4 segments: . Querying of momentary battery voltage via menu function.

automatically: – If battery voltage drops to below approx.

1.8 V

– If none of the keys or the rotary switch

are activated for an adjustable duration (10 to 59 min.), and the multimeter is not in the continuous operating mode

accessories) has been plugged into the instrument, the batteries are disconnected automatically. Rechargeable batteries can only be recharged externally.

GMC-I Messtechnik GmbH 59

Technical Data

Display

LCD panel (65 mm x 36 mm) with analog and digital display including unit of measure, type of current and various special functions

Background illumination

Background illumination is switched off approximately 1 minute after it has been activated.

Analog

Display LCD scale with bar graph or pointer,

Scaling With 4 division lines each

Polarity display With automatic switching Overflow display With the symbol Measuring rate 40 per second and display refresh

Digital

Display / Char. Height Number of places 59,999 steps Overflow display “0L” is displayed for 60, 000 digits Polarity display “–” (minus sign) is displayed

Measuring rate 10 measurements per second;

depending upon A.diSP parameter setting

1 bar/pointer corresponds to 2,500 digits at the digital display for High Resolution 60,000 digits

(U and I)

7-segment characters / 15 mm

if plus pole is connected to “”

40 per second with Min/Max function except with capacitance, frequency and duty cycle measuring functions

Refresh Rate 2 times per sec., every 500 ms (Standard*:

noFiL=OFF) 5 x/s (Parameter noFiL=on)

* All specifications refer to the default update rate with measuring param-

eter noFiL = OFF (default).

Acoustic Signals

For voltage Intermittent signal at above 1000 V For current Intermittent signal at above 10 A

Continuous signal at above 16 A

Fuse for METRAHIT EXTRA, METRAHIT ETECH

Fuse FF (UR) 10 A/1000 V AC/DC,

10 x 38 mm, switching capacity: 30 kA at 1000 V AC/DC, protects the current input socket in the 600 A to 10 A ranges

60 GMC-I Messtechnik GmbH

Technical Data

Electrical Safety

per IEC 61010-1:2010/VDE 0411-1:2011 Safety class

Pollution degree 2

METRAHIT E

XTRA, METRAHIT ETECH, METRA HIT EBASE

Measuring category CAT III CAT IV Operating voltage 1000 V 600 V Tes t v ol t ag e

6.7 kV~

METRAHIT ESPECIAL

Special device for measurements at current transformers without fuse in the electrical circuit

Measuring category CAT II Operating voltage 600 V Tes t v ol t ag e

3.5 kV~

Electromagnetic Compatibility (EMC)

Interference emission EN 61 326-1: 2013, class B Interference immunity EN 61326-1: 2013

EN 61326-2-1: 2013

Ambient Conditions

Accuracy Range 0 C ... +40 C Operating

temp. range 10 C ... +50C Storage

temp. range 25 C ... +70 C (withoaut batteries) Relative humidity max. 75%, no condensation allowed Elevation to 2000 m Deployment

Indoors; outdoors only within specified ambient conditions

Mechanical Design

Housing Impact resistant plastic (ABS) Dimensions 200 x 87 x 45 mm

(without protective rubber cover) Weight Approx. 0.35 kg with batteries Protection Housing: IP 52

Table Excerpt Regarding Significance of the IP Code

IP XY

(1st digit X)

Protection against pene-

tration of solid particles

5 Dust protected 2 Dripping (15 inclination)

IP XY

(2nd digit Y)

Protection against

penetration by water

GMC-I Messtechnik GmbH 61

Maintenance – Calibration

Attention!

Note

MEASURE

SETUP

FUNC

ENTER

9 Maintenance and Calibration

Disconnect the instrument from the measuring circuit before opening the battery compartment lid or fuse cover in order to replace batteries or fuses!

9.1 Displays – Error Messages

Message Function Meaning

FUSE

9.2 Batteries

Current measurement Blown fuse

In all operating modes Battery voltage has fallen below 1.8 V

Measurement Indicates overflow

Removing the Batteries During Periods of Non-Use

The integrated quartz movement draws power from the batteries even when the instrument is switched off. It is advisable to remove the batteries during long periods of non-use for this reason (e.g. vacation). This prevents excessive depletion of the battery, which may result in damage under unfavorable conditions.

Battery

The current battery charge level can be queried in the “1nfo” menu:

1nFo bAtt

2.75 V.

Make sure that no battery leakage has occurred before initial start-up, as well as after long periods of storage. Continue to inspect the batteries for leakage at short, regular intervals.

If battery leakage has occurred, carefully and completely clean the electrolyte from the instrument with a damp cloth, and replace the batteries before using the instrument.

If the “ ” symbol appears at the display, the batteries should be replaced as soon as possible. You can continue working with the instrument, but reduced measuring accuracy may result.

The instrument requires two 1.5 V batteries in accordance with IEC R 6 or IEC LR 6, or two equivalent rechargeable NiMH batteries.

Battery Replacement for METRAHIT EXTRA

Stored measurement data are not lost when the batteries are replaced. The selected operating parameters remain in memory, although date and time must be reentered.

62 GMC-I Messtechnik GmbH

Maintenance – Calibration

Attention!

Blown Fuse

fuse

Replacing the Batteries

Disconnect the instrument from the measuring circuit before opening the battery compartment lid in order to replace the batteries.

➭ Set the instrument face down onto the working surface.

➭ Turn the slotted screw on the lid with the battery symbols

counterclockwise.

➭ Lift off the lid and remove the batteries from the battery

compartment.

➭ Insert two new 1.5 V mignon batteries into the battery

compartment, making sure that the plus and minus poles match up with the provided polarity symbols.

➭ When replacing the battery compartment lid, insert the side

with the guide hooks first. Tighten the screw by turning it clockwise.

➭ Please dispose of depleted batteries in accordance with

environmental protection regulations!

9.3 Fuse (METRAHIT E

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

XTRA

and METRAHIT E

TECH

only)

If the fuse is blown or has not been inserted, “FuSE” appears at the digital 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.

GMC-I Messtechnik GmbH 63

Maintenance – Calibration

Attention!

Note

Pb Cd Hg

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, 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, FUSE appears at the display.

9.4 Housing Maintenance

No special maintenance is required for the housing. Keep outside surfaces clean. Use a slightly dampened cloth for cleaning. Avoid the use of cleansers, abrasives or solvents.

9.5 Return 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 RoHS 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 with 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 page 4). If you use batteries or rechargeable batteries in your instrument or

accessories which no longer function properly, they must be duly disposed of in compliance with the applicable national regulations. Batteries or rechargeable batteries may contain harmful substances or heavy metal such as lead (PB), cadmium (CD) or mercury (Hg).

They symbol shown to the right indicates that batteries or rechargeable batteries may not be disposed of with the trash, but must be delivered to collection points specially provided for this purpose.

64 GMC-I Messtechnik GmbH

Maintenance – Calibration

9.6 Recalibration

The respective measuring task and the stress to which your measuring instrument is subjected affect the ageing of the components and may result in deviations from the guaranteed accuracy.

If high measuring accuracy is required and the instrument is frequently used in field applications, combined with transport stress and great temperature fluctuations, we recommend a relatively short calibration interval of 1 year. If your measuring instrument is mainly used in the laboratory and indoors without being exposed to any major climatic or mechanical stress, a calibration interval of 2-3 years is usually sufficient.

During recalibration* in an accredited calibration laboratory (DIN EN ISO/IEC 17025) the deviations of your instrument in relation to traceable standards are measured and documented. The deviations determined in the process are used for correction of the readings during subsequent application.

We are pleased to perform DAkkS or factory calibrations for you in our calibration laboratory. Please visit our website at www.gossenmetrawatt.com ( Company  DAkkS Calibration Center or  FAQs  Calibration questions and answers).

By having your measuring instrument calibrated regularly, you fulfill the requirements of a quality management system per DIN EN ISO 9001.

* Verification of specifications or adjustment services are not part of the

calibration. For products from our factory, however, any necessary adjustment is frequently performed and the observance of the relevant specification is confirmed.

9.7 Manufacturer’s Guarantee

All METRAHIT digital multimeters and calibration instruments are guaranteed for a period of 3 years after 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 conformed to the specified technical data at the time of calibration. We guarantee the observance of the specified technical data within the admissible tolerance limits for a period of 12 months from delivery.

GMC-I Messtechnik GmbH 65

Accessories

Attention!

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 ( Measuring Technology - Portable  Digital Multimeters 

METRA HIT ...  Accessories).

10.2 Technical Data for Measurement Cables (included: KS17-2 safety cable set)

Electrical Safety

1000 V

Maximum Rated Voltage 600 V Measuring Category

CAT IV CAT III CAT II

Maximum Rated Current 1 A 1 A 16 A

with safety cap applied

without safety cap applied —

* Exception METRAHIT ESPECIAL: 600 V

—

1000 V*

—



Application KS17-2

In conformity with standard DIN EN 61010-031, measurements in an environment according to measuring category III and IV may only be performed with the safety cap applied to the test probe of the measurement cable (Exception:

METRAHIT ESPECIAL is only approved for mea-

suring category 600 V CAT II).

For establishing contact in 4 mm jacks you have to remove the safety cap by levering out the snap lock of the safety cap with another sharp object (e.g. the second test probe).

10.3 NA X-TRA Power Pack (not included)

Use only the power pack from GMC-I Messtechnik GmbH in combination with your instrument. This assures operator safety by means of an extremely well insulated cable, and safe electrical isolation (nominal secondary ratings: 5 V / 600 mA). Installed batteries are disconnected electronically if the power pack is used, and need not be removed from the instrument.

Ambient Conditions (EN 61010-031)

Tem pe ra tu re –2 0C ... + 50C Relative humidity max. 80% Pollution degree 2

66 GMC-I Messtechnik GmbH

10.4 Interface Accessories (not included)

USB X-TRA Bidirectional Interface Adapter

This adapter makes it possible to connect multimeters of the STARLINE series which are equipped with a serial IR interface to the USB port at a PC. The adapter allows for data transmission between the multimeter and the PC.

METRAwin 10 PC Analysis Software METRAwin 10 PC software is a multilingual, measurement data log-

ging program* for recording, visualizing, evaluating and documenting measured values from METRA HIT multimeters.

Details on the system requirements are given in the installation instructions of METRAwin 10/METRAwin 45.

Accessories

* runs under any IBM compatible Windows operating system

GMC-I Messtechnik GmbH 67

Index

11 Index

Numerics

0.diSP .....................................................................49

A.diSP .....................................................................49

Addr ........................................................................53

APoFF .....................................................................49

Automatic Shutdown

.......................................................17

Disabling

Specifying a Time .........................................17

AUTO-Range Function ...........................................18

bAtt .........................................................................48

Batteries

Charge Level .................................................62

Charging Level ..............................................13

Periods of Non-Use ......................................62

Replacement .................................................63

bEEP .......................................................................50

Cable Resistance ...................................................38

Capacitance Measurement ...................................39

Clear Memory .........................................................24

Continuity Test .......................................................35

Current Clamp Sensors ...................................43, 44

Current Clamps Transformer .................................45

Current Measurement

Notes .............................................................40

Scope of Functions .......................................40

68 GMC-I Messtechnik GmbH

dAtE ...................................................................48, 50

dbrEF .......................................................................49

Default Settings ......................................................51

Diode Test ...............................................................36

Display Illumination ................................................16

Duty Cycle Measurement .......................................33

Error Messages ......................................................62

Fuse

Characteristic Values

....................................60

Housing Maintenance ............................................64

Interfaces

Accessories

States ............................................................13

irStb .........................................................................53

itEMP .......................................................................48

...................................................67

Manufacturer’s Guarantee .....................................65

Measured Value Storage

DATA Function

Min-Max Values ............................................22

Measurement Cables .............................................66

Measuring Category

Characteristic Values ....................................61

Significance .....................................................8

..............................................21

Measuring Range Selection

Automatic

Manual .......................................................... 18

Memory

Ending Recording

Querying Occupancy .................................... 24

Start Recording ............................................. 23

...................................................... 18

......................................... 24

noFiL ....................................................................... 48

OCCUP .................................................................... 48

Overview

Keys and Connections

Parameters ...................................................47

.................................. 12

Power Pack

Accessories

Connector Socket Position ........................... 15

Initial Start-Up ............................................... 16

Product Support ....................................................... 3

Product Support Hotline .......................................... 3

.................................................. 66

rAtE ......................................................................... 48

Recalibration Service .........................................4, 65

Remote ................................................................... 37

Repair and Replacement Parts Service .................. 4

Replacing the Fuse ................................................ 63

Resistance Measurement ...................................... 34

Return of Old Devices ............................................ 64

Safety Precautions ...................................................8

Software Enabling ....................................................3

Standard Equipment ................................................2

Switching the Instrument On

Manual ..........................................................16

Via PC ............................................................16

Symbols

Digital Display ...............................................13

Instrument .....................................................15

Rotary Switch Positions ................................14

Temperature Measurement

With Resistance Thermometers

With Thermocouples .....................................37

tiME ...................................................................48, 50

Training .....................................................................3

...................38

Use for Intended Purpose ......................................10

vErSion ....................................................................48

Voltage Comparator .........................................29, 31

Voltage Measurement

Notes .............................................................26

Scope of Functions .......................................26

WEEE Mark .............................................................15

Index

GMC-I Messtechnik GmbH 69

Edited in Germany Subject to change without notice  A pdf version is available on the internet

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 METRAHIT EXTRA, METRAHIT ETECH, METRAHIT ESPECIAL, METRAHIT EBASE User guide

Specifications and Main Features

Frequently Asked Questions

User Manual

1 Safety Features and Precautions

1.1 Use for Intended Purpose

1.2 Meanings of Danger Symbols

1.3 Meanings of Acoustic Warning Signals

Operating Overview – Connections, Keys, Rotary Switch, Symbols

3 Initial Start-Up

3.1 Inserting Batteries or Rechargeable Batteries

3.2 Activation

3.3 Setting the Operating Parameters

3.4 Switching the Instrument Off

4 Control Functions

4.1 Selecting Measuring Functions and Measuring Ranges

4.1.1 Automatic Range Selection

4.1.2 Manual Measuring Range Selection

4.1.3 Quick Measurements

4.2 Zero Offset / Relative Measurements

4.3 Display (LCD)

4.3.1 Digital Display

4.3.2 Analog Display

4.4 Measured Value Storage: DATA (auto-hold / compare)

4.4.1 Saving Minimum and Maximum Values – MIN/MAX Function

4.5 Measurement Data Recording (METRAHIT EXTRA only) The METRAHIT E

5 Measurements

5.1 Voltage Measurement

5.1.1 Direct and Pulsating Voltage Measurement, V DC and V (DC+AC)

5.3 Continuity Test

5.4 Diode Testing with a Constant Current of 1 mA

5.5 Temperature Measurement

5.5.1 Measurement with Thermocouples, Temp TC

5.7 Current Measurement

5.7.4 Alternating Current Measurement with Current Clamp Sensors, A AC and Hz

6 Device and Measuring Parameters

6.1 Paths to the Various Parameters 6.2 List of All Parameters

6.3 Querying Parameters – InFo Menu (as moving letters)

6.4 Entering Parameters – SETUP Menu

6.5 Default Settings

7 Interface Operation

7.1 Activating the Interface

7.2 Configuring Interface Parameters

8 Technical Data

9 Maintenance and Calibration

9.1 Displays – Error Messages

9.2 Batteries

9.4 Housing Maintenance

9.5 Return and Environmentally Sound Disposal

9.6 Recalibration

9.7 Manufacturer’s Guarantee

10 Accessories

10.1 General

10.2 Technical Data for Measurement Cables (included: KS17-2 safety cable set)

10.3 NA X-TRA Power Pack (not included)

10.4 Interface Accessories (not included)

11 Index