Gossen MetraWatt METRISO C Operating Instructions Manual

METRISO®C-GB int.

Insulation, Resistance and Contact Current Measuring Instrument

3-349-087-03

12/11.08

Operating Instructions

2 GMC-I Messtechnik GmbH

METRISO®C Measuring and Test Instrument METRISO®C Control Panel and Display

LIMIT

U>25V

Netz

Mains

START

Operating and

Contact surface

Socket for
external charger

Keys for the selection of basic

LCD

P

o

t

e

n

t

i

a

l

d

i

f

f

e

r

e

n

c

e

≥

1

5

0

V

b

e

t

w

e

e

n

M

a

i

n

s

o

r

i

n

t

e

r

f

e

r

e

n

c

e

v

o

l

t

a

g

e

a

t

m

e

a

s

u

r

e

m

e

n

t

i

n

p

u

t

I

n

s

u

l

a

t

i

o

n

v

o

l

t

a

g

e

a

t

m

e

a

s

u

r

e

m

e

n

t

i

n

p

u

t

>2

5

V

L

i

m

i

t

v

a

l

u

e

v

i

o

l

a

t

i

o

n

Left switch contact:

Displays basic functions,

Toggle Switch

Middle switch contact:

Starts measurement

functions and sub-functions,

Right switch contact:

Displays basic functions,

scrolling from right to left scrolling from left to right

Battery level display

f

i

n

g

e

r

c

o

n

t

a

c

t

a

n

d

m

e

a

s

u

r

e

m

e

n

t

i

n

p

u

t

Indicator lamps

Shield
jack

Measurement
jack, COM

Meas. jack + pole

article no. Z501N

(menu-driven operation)

The desired measuring
functions can be dis­played with the help of
the and keys.

The scroll bar indicates which
menu is currently open.

Fuse

C

a

r

r

y

i

n

g

s

t

r

a

p

C

l

o

s

u

r

e

display unit

Infrared interface

Temperature and
humidity measuring adapter
Z541A

GMC-I Messtechnik GmbH 3

LCD after Switching on the Instrument

Please proceed as follows if the LCD display is not legible, i.e. too bright
or too dark, after switching on the test instrument:

1 Simultaneously press the two right-hand keys to delete the memory

which might be faulty.
2 Wait a few seconds to allow the display to be updated.
3 Readjust the contrast if necessary, see page 8.

Instructions for the Plug-on of the Following Accessory Adapters

• Interface converter IrDa-USB (Z501J)

• Temperature and humidity measuring adapter (Z541A)
➭ Connect the adapter with the IR interface of the test instrument, see

drawing on page 2: Insert the guide rail of the adapter in the opening

provided on top of the tester so that the adapter is located in the mid-

dle of the housing, resting on the two rubber cushions. Then push the

adapter down to ensure that it is safely fastened.

PC software WinProfi for communication with METRISO

®

C

The PS3 CD-ROM includes the software WinProfi with the following con­tent and functions:

• up-to-date test instrument software
– for loading another language
– for loading software version updates,

• Exchange of measured data between test instrument and PC

• Preparation, print-out and filing of test reports at the PC

The following interface converter is required for communication between
test instrument and PC:

– IrDa-USB Converter (Z501J): IrDa (tester) – USB (PC)

Data Backup

Measurement data and electrical circuit assignments can be safely stored
in a RAM as long as the associated battery supplies the required voltage.

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

For data processing and management we recommend the following PC
software programs:

• PS3 (documentation, management, report generation and
monitoring of deadlines)

• PC.doc-WORD/EXCEL (report and list generation)

• PC.doc-ACCESS (test data management)

+

4 GMC-I Messtechnik GmbH

Contents Page Contents Page

1 Applications .....................................................................................5

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

3 Initial Start-Up .................................................................................6

3.1 Battery Test ....................................................................................................6

3.2 Installing and Replacing Batteries .....................................................................6

3.3 User Guide in a Different Language ..................................................................6

3.4 Selecting a Menu and Configuring Basic Settings .......................................... 6

3.5 Downloading a Software Update, Managing Report Data ...................................9

4 General Operation .........................................................................12

4.1 Automatic Settings, Monitoring and Shutdown ................................................12

4.2 Measurement Value Display ..........................................................................12

4.3 Online Help ...................................................................................................12

5 Measuring Insulation Resistance ..................................................13

5.1 Insulation Measurement with Adjustable Test Voltage ......................................14

5.2 Measurement with Rising Test Current ...........................................................14

5.3 Setting the Limit Value ..................................................................................14

6 Database Functions .......................................................................15

6.1 Creating a Data Record – Data Function .........................................................15

6.2 Saving Measurement Values – STORE Function ..............................................16

6.3 Querying Data Records – View Function .........................................................16

6.3.1 Deleting a Data Record from within a Memory Address – View Function ...........17

6.3.2 Deleting a Memory Address – Data Function ..................................................17

6.3.3 Delete All Memory Addresses – Data Function ................................................18

6.4 Print Function ...............................................................................................18

7 Measuring Alternating Voltage ......................................................19

8 Measuring Temperature and Humidity with Adapter Z541A

(Accessory Adapter) ......................................................................19

9 Measuring Low-Value Resistance (to 100 Ω) ................................20

9.1 Compensation for Measurement and Extension Cables (up to 10 Ω) .................21

9.2 Setting the Limit Value .................................................................................. 21

10 Measuring Contact Current ...........................................................22

10.1 Setting the Limit Value .................................................................................. 22

11 Characteristic Values .................................................................... 23

12 List of Abbreviations and their Meanings .....................................25

13 Maintenance .................................................................................25

13.1 Self-Test .................................................................................................. 25

13.2 Battery Operation ......................................................................................... 26

13.3 Changing the Batteries of the Temperature and Humidity Measuring

Adapter Z541A ............................................................................................ 26

13.4 Fuses .......................................................................................................... 26

13.5 Housing ....................................................................................................... 27

14 Repair and Replacement Parts Service

DKD Calibration Center* and Rental Instruments Service ............. 27

15 Product Support ............................................................................28

GMC-I Messtechnik GmbH 5

1 Applications

This instrument fulfills the requirements of the applicable European and
national EC guidelines. We confirm this with the CE marking. The relevant dec­laration of conformity can be obtained from GMC-I Messtechnik GmbH.
The METRISO®C test instrument allows for quick and efficient testing of
protective measures in accordance with DIN VDE 0100, ÖVE-EN 1 (Aus­tria), SEV 3755 (Switzerland) and other country specific regulations. The
instrument is equipped with a microprocessor and complies with IEC/
EN 61557/VDE 0413.
Part 1: General requirements
Part 2: Insulation resistance measuring instruments
Part 4: Measuring instruments for the measurement of resistance at

earth conductors, protective conductors and bonding
conductors

as well as requirements in accordance with VDE 0701-0702:
Repair, modification and testing of electrical devices

The test instrument is especially well suited for:

• Systems installation

• Initial start-up

• Periodic testing

• Troubleshooting in electrical systems
All required measurements can be performed for approval reports (e.g. for

ZVEH) with the help of a set consisting of the PROFiTEST

®

C and the

METRISO

®

C.
Measurement values can be transmitted to a PC for printing and archiving
via the integrated IR data interface at the METRISO

®

C. This is especially

important where product liability is concerned.

The following measurements and tests can be performed with the METRISO

®

C:

• Insulation resistance

• Low-value resistance

• Contact current

• Voltage and frequency

• Temperature and humidity (with accessories)

The following can also be measured with a shielded measurement cable:

• Conductivity of floor coverings for electrostatic discharge

2 Safety Features and Precautions

The METRISO®C electronic measuring and test instrument is manufac­tured and tested in accordance with safety regulations IEC/EN 61010-1/
VDE 0411-1 and EN 61557. If used for its intended purpose, the safety of
the operator and the instrument is assured.

Read the operating instructions carefully and thoroughly before using your
instrument, and observe all instructions included therein.

The measuring and test instrument may not be used:

• If the battery compartment cover has been removed

• If external damage is apparent

• With damaged connector cables or measuring adapters

• If it no longer functions flawlessly

• After excessive stress due to transport

• After lengthy periods of storage under unfavorable conditions
(e.g. humidity, dust, extreme temperatures)

• While the batteries are being charged

Meanings of Symbols on the Instrument

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

Protection class II device

CAT II Measuring category I I device

9 V DC charging socket for NA102 charging adapter
(

part no.Z501N)

Approval mark by VDE test authority

Indicates EC conformity

This device may not be disposed of with the trash. Further informa­tion regarding the WEEE mark can be accessed on the Internet at
www.gossenmetrawatt.com under the search term ’WEEE’

.

!

–

6 GMC-I Messtechnik GmbH

3 Initial Start-Up

3.1 Battery Test

Five battery symbol segments ranging from depleted to fully charged
continuously indicate the current battery level at the main menu.

3.2 Installing and Replacing Batteries
New batteries must be installed before initial start-up, or when only one

solid segment remains in the battery symbol.

Attention!

!

The instrument must be disconnected from the measuring circuit
(mains) at all poles before the battery compartment is opened.

Four 1.5 V baby cells in accordance with IEC LR14 are required for
operation of the METRISO

®

C. Use alkaline-manganese batteries only.
Rechargeable NiCd or NiMH batteries can be used as well. Be absolutely
sure to refer to chapter 13.2, page 26, regarding the charging cycle and
the charging adapter.
Always replace the batteries in complete sets.
Dispose of batteries in an environmentally sound fashion.
➭ Loosen the two slotted screws at the battery compartment cover on

the housing rear panel and remove the cover.

➭ Insert four 1.5 V baby cells making certain they are poled in

accordance with the symbols. Insert the two batteries which are half
covered by the housing first.

➭ Replace the cover and retighten the screws.

Attention!

!

The instrument may not be operated if the battery compartment
cover has not been installed and properly tightened!

3.3 User Guide in a Different Language

By performing a software update it is possible to load another language
for the user guide than the one included in the scope of supplies. Any lan­guage currently available is proposed for choice when WinProfi is being
installed, see chapter 3.5.

3.4 Selecting a Menu and Configuring Basic Settings

Press the or the key in order to display the desired measuring
function, the device settings or the database functions.

START

START

GMC-I Messtechnik GmbH 7

Default Settings – Last Used Settings

A selection can be made here as to whether the menus will be displayed
according to the default settings, or if the last opened menus should be
displayed.

➭ Activate the Setup key.
➭ Press the Default key, if required:

on ✓ Settings such as T

on

(= 20sec) are reset to the default settings

each time the instrument is switched on.

off ✓ The last used settings remain when the instrument is switched

on.

➭ Press the key to quit the setup menue.

Setting On-Time, Manual Shutdown

➭ Activate the Setup key.
➭ Press the T

on

key and then the 10sec, 20sec, 30sec or 60sec key depend­ing upon the desired duration after which the test instrument should
switch off automatically. Additional setting options can be displayed
with the help of the and scroll keys.
The “>>>>>” setting indicates that no automatic shutdown will occur.
The selected setting has a considerable influence on battery service
life.

➭ Press the key to quit the setup menue.

The instrument can be switched off manually by simultaneously activating the two
outermost softkeys.

8 GMC-I Messtechnik GmbH

Background Illumination and Contrast

➭ Activate the Display key.
➭ In order to extend battery service life, display illumination can be

switched off entirely.
Press the corresponding softkey to this end.

If LCD illumination is activated (= ON), it is automatically switched off
several seconds after the last key has been activated in order to extend
battery service life. As soon as a key is activated again, illumination is
switched back on.

➭ Contrast can be optimized with the two keys at the far right.
➭ Press the START key to quit the setup menue. The data are saved to

memory.

Setting the Clock

➭ Activate the Time key.
➭ The cursor appears at the first digit in the date. Enter the desired

numeral with one of the softkeys.
Numerals which do not appear in the window can be displayed with
the help of the or the key. Each time a numeral is selected,
the cursor moves to the next position to the right.

➭ Date and time are saved as soon as the last numeral has been

entered.

➭ Press the START key to quit the setup menue. The data are saved to

memory.

low high

Contrast

off on

LCD Illumination

GMC-I Messtechnik GmbH 9

3.5 Downloading a Software Update, Managing Report Data

If you require an updated test instrument software, it can be downloaded
with the help of WinProfi PC software. The data file with the desired soft­ware version is transmitted to the test instrument via the serial interface.
The previously installed language is overwritten.

Note

This software includes all of the functions required for communica­tions between the METRISO

®

C and the PC. A description of the
program is included in the online user’s manual which can be
accessed from WinProfi.

Programm WinProfi

A Install WinProfi to the PC and Start the Program

➭ First install the software to your PC.

Insert the CD into the CD drive, for example drive E.
Execute the file E:\GMCDEMO

➭ Click the globe icon.
➭ Follow the instructions which appear at the monitor.

The program is added to your START menu after installation.

➭ Establish a connection between your PC and the

PROFiTEST

®

0100S-II test instrument by using interface converter

IrDa-USB.

➭ Start WinProfi.
➭ Switch on the test instrument.
➭ Set the on-time period of the METRISO

®

C to „>>>>>“, to give you
enough time for adjusting the settings in WinProfi before the test in­strument switches off again automatically, see chapter 3.3.

Display or print out online user’s manual

The online manual contains information concerning the software which is
not included in these operating instructions.

10 GMC-I Messtechnik GmbH

B Prerequisites for Software Update or Data Exchange

➭ Find the interface to which the METRISO

®

C is connected.

Note

Always start this function first, before performing an update or chang­ing report templates. After starting this function, WinProfi loads the

report files specifically necessary for the connected instrument.
Due to the fact that WinProfi has been created for use with several
types of test instruments, incorrect test reports may otherwise be
loaded, or erroneous options may be made available.

➭ Query information regarding current software version

C Transmission of a Software Update to the Test Instrument

➭ PC: Select the Update All function from the Update menu. Follow the

instructions which appear at the monitor.

Depending upon the utilized PC, transmission takes from 1 to 2 minutes.

The NETZ/MAINS LED of the METRISO

®

C test instrument lights up green and indicates

that the instrument is ready to receive data. If the PC and the test instrument are correctly
synchronized, the same LED lights up yellow. During programming sequences, the LIMIT
and U>25V LEDs light up red and the NETZ/MAINS LED lights up yellow in alternating
order. Upon completion of data transmission, the NETZ/MAINS LED briefly lights up green,
afterwards all LEDs go out.
The message „Transmission done“ appears on the computer screen

Attention!

!

The instrument may not, under any circumstances, be switched
off during transmission, nor may the connection between the in­strument and the PC be interrupted!

GMC-I Messtechnik GmbH 11

D Managing Report Data

➭ Connect the METRISO

®

C test instrument with your PC via the IrDa-

USB converter

➭ Start WinProfi.
➭ Switch on the test instrument.
➭ Set the on-time period of the METRISO

®

C to „>>>>>“, to give you
enough time for adjusting the settings in WinProfi before the test in­strument switches off again automatically, see chapter 3.3.

• Send or receive a data file

•Print data

• Edit or transmit report templates

6

3

5

2

1

4

12 GMC-I Messtechnik GmbH

4 General Operation

The test cables are connected to the “+” and “COM” jacks.

The shielded cable should also be connected to
the COM and SHIELD jacks for the measurement of
electrostatic discharge capacity at floor cover­ings. (Accessory equipment KS-C „Cable set
consisting of measurement cable and high-resis­tance measurement cable for METRISO C, for
measurements in the GΩ range“, see connection
diagram). Observe color codes when connecting
the cables!

4.1 Automatic Settings, Monitoring and Shutdown

The instrument cannot be placed into operation, or it is shut down auto­matically, if battery voltage has fallen to below the lower limit value.

Measurement is automatically interrupted and/or the measuring function
is disabled if voltage exceeds the allowable limit in the resistance range
(U > 25 V).
The instrument switches itself off automatically, at the earliest after the
current (automatic) measuring sequence has been completed, and after
the predefined on-time has elapsed (see chapter 3.4). On-time is reset to
the duration selected in the setup menu each time a key is activated.

Lamp Functions

4.2 Measurement Value Display

The following is displayed at the LCD:

• Measurement values with abbreviated quantity type and units of
measure

• The selected function

When automatic measuring sequences are used, the measurement
values are displayed in digital format until the next measuring sequence is
started, or until the instrument switches itself off automatically.
If the measuring range upper value is exceeded, the upper value is dis­played preceded by the greater than symbol “>” in order to indicate over­ranging.

4.3 Online Help

Appropriate online help texts can be displayed at the LCD for each of the
basic functions and sub-functions, after the respective function has been
selected in the corresponding menu.
➭ Press the

key to query online help.

Press any key to exit the help function.

Lamp Status Function

red

Potential difference ≥ 150 V
between finger contact and measurement input

Netz

Mains

blinking red

Line voltage or interference voltage is present at the measurement inputs
(insulation resistance and low resistance measurement are disabled)

LIMIT

red

– Measured insulation resistance is less than the selected limit

value.

– The measured low-value resistance is less than the allowable

limit value.

U>25V

red

A voltage of greater than 25 V is present at the measurement
inputs.
The discharging process is not yet complete.

COM

SHIELD

+

KS-C
(Z541F)

i

GMC-I Messtechnik GmbH 13

5 Measuring Insulation Resistance

Insulation resistance can only be measured at voltage-free objects. If
mains voltage or an interference voltage is applied to the measurement
cables, insulation resistance is not measured and the Netz/Mains lamp
lights up.

Note

Testing of Measurement Cables

We recommend short-circuiting the measurement cables with the
test probes before carrying out the insulation measurement to
check whether the instrument indicates almost zero W (see chap­ter 9). This helps to discover interruptions in the measurement
cables which simulates a high insulation resistance.

➭ Press the R

ISO

key.

The currently selected test voltage (nominal voltage) is displayed between

R

ISO

and U

ISO

.

➭ Select another test voltage if necessary by pressing U

ISO

and then the

desired test voltage.

➭ Connect the device under test to the + and COM jacks.
➭ Start the measurement by pressing the START key.

Attention!

!

Do not touch the connector terminals at the instrument during
performance of insulation resistance measurement!

Note

Three-Phase Current Systems

All conductors (L1, L2, L3 and N) must be measured against PE!

If the connector terminals are free, or if they have been connected to an
ohmic power consumer for the performance of a measurement, a current
with a value of approximately 1 mA would flow over your body at a voltage
of 1000 V.
This electrical shock is not life endangering. However, the plainly
perceptible shock may result in injury (as a result of startling etc.).

Capacitive Devices Under Test

Attention!

!

If measurement is performed at a capacitive object, e.g. a long
cable, it is charged to a level of as great as 1000 V!

In this case, contact with the object is life-endangering!

After completion of insulation resistance measurement at capacitive
objects, the device under test is automatically discharged via the
instrument after the START key has been released. Contact with the object
must therefore be maintained.

Do not disconnect the device under test until U

ISO

< 25 V appears at the display.

Note

The instrument’s batteries are depleted rapidly during the
measurement of insulation resistance. Only hold the START key
depressed until the display value has stabilized.

14 GMC-I Messtechnik GmbH

5.1 Insulation Measurement with Adjustable Test Voltage

A DC test voltage within a range of 50 to 1000 V can be selected with the
U

VAR

function for measurements at sensitive components and in

systems equipped with voltage limiting components.

➭ Select the U

VAR

function from the U

ISO

menu with the or the

key and acknowledge with the U

VAR

key.

➭ In order to enter the desired value:

Display the desired numerals, and if required the decimal point, with
the help of the and keys. Select the desired numerals with
the appropriate softkeys. Each time an entry is made, the cursor
moves one place to the right. After a maximum of three numerals
have been entered, exit the data entry window by pressing the → soft-
key. If the selected voltage is not within the valid range, the cursor
jumps back to the entry position for the first digit.
After the value has been completely entered and acknowledged with
the START key, U

VAR

is displayed between R

ISO

and U

ISO

.

➭ The remainder of the measurement procedure is identical to the test

sequence used for predefined nominal voltages.

5.2 Measurement with Rising Test Current

The “U ” function can be used for the detection of weak points in
insulation, as well as for the determination of response voltage at voltage
limiting devices.

➭ Select the U function from the U

ISO

menu with the or the

key and acknowledge with the U

key.

As long as the START key is depressed, test voltage is continuously
increased. Insulation measurement begins:

• As soon as maximum voltage is reached (= variable test voltage, see
chapter 5.1) or

• As soon as the START key is released
(when the desired voltage appears at the display) or

• As soon as a measurable test current is detected (e.g. after a
discharge voltage sparkover).

Test voltage, any response or discharge voltages values and insulation
resistance are all displayed.

5.3 Setting the Limit Value

A limit value for insulation resistance can be selected with the LIMIT key. If
measured values are detected below the limit value, the red LIMIT LED
lights up.

START

START

GMC-I Messtechnik GmbH 15

6 Database Functions

The displayed measurement data for each measurement can be saved to
an internal database, with or without a comment. A data record must be
created and allocated to a specific memory address in order to be able to
assign the individual measurement values to different buildings, distribu­tion cabinets and measuring circuits.

6.1 Creating a Data Record – Data Function

➭ Press the Data key.

➭ First create the desired memory address with the help of the softkeys.

After acknowledging with the START key (press at center), the cursor
appears at the first data entry position (BUILDING).

➭ With the help of the softkeys, entries can be made to the BUILDING,

DISTRIBUTOR CABINET, RCD No. and CIRCUIT fields one after the other, and

a designation can be entered for the electrical circuit.

Entering Data:

Display the desired alphanumeric character by pressing the or
the key, and then select the character with the corresponding
softkey.
Control characters can be entered in the same way and have the fol­lowing meanings:

←: Move cursor to the left (without deleting data)
→: Move cursor to the right (without deleting data)
↵: Same function as the START key

After each character is selected, the cursor moves one position to the
right. If ↵ or the START key is activated (press at center), the cursor
moves to the next entry field. After the fields BUILDING, DISTRIBUTOR
CABINET, RCD No. and CIRCUIT have been completed, and after acknowl­edgement has been confirmed with the ↵ softkey, the data fields are
displayed as inverse images. After the ↵ softkey has been activated
once again, a designation for the selected electrical circuit can be en­tered.

Note

These entries are required by the PC software in order to enter
measurement values into the database, and to generate reports
with this information automatically.

16 GMC-I Messtechnik GmbH

6.2 Saving Measurement Values – STORE Function

➭ Start the respective measurement. The STORE key is displayed after

the measurement instead of the INFO key.
The STORE key is not displayed until after a given amount of time has
elapsed for measurements which are performed without the START
key. For example, the store key is not displayed after voltage
measurements until a given amount of time has elapsed, so that the
operator can first query the help text with the INFO key.

➭ The displayed measurement values are stored to the currently

selected database memory address by briefly acknowledging with
the STORE key. The key is briefly displayed as an inverse image during
storage to memory.

➭ Pressing and holding the STORE key allows for the entry of a comment,

and storage of the current measurement.

Entering a comment:

Display the desired alphanumeric character with the or the
key and select the desired character with the corresponding softkey.
Control characters are entered in the same way and have the
following meanings:

←: reverse and delete,
↵: same as the START key

After each character has been selected, the cursor moves one posi­tion to the right. Already entered characters can be deleted in reverse
by pressing and holding any softkey (except for ↵ ).
After entry of up to 15 characters, save the measurement values and
the comment by acknowledging with the START key (press at center) .
The following message appears: “Data are stored”.

Note

The test reports included with the analysis software (e.g. PS3)
have separate fields for measured values R

ISON

(without load) and

R

ISOL

(with load). Enter an “N” as the first character for measure-

ment of R

ISON

(i.e. without load), so that the analysis software is
able to determine which value is to be stored for the report.
Otherwise, measured values are automatically stored as R

ISOL

, i.e.

with load.

6.3 Querying Data Records – View Function

➭ Select View.
➭ You can scroll forward through the memory addresses with the

key, or backwards with the key.

➭ After selecting a memory address, the individual data records can be

queried with the Prev. and Next softkeys, which have been stored to
memory under consecutive numbers.

START

GMC-I Messtechnik GmbH 17

In case a measurement value is missing for the currently selected current
circuit, perform the measurement and the value will be immediately
stored.

6.3.1 Deleting a Data Record from within a Memory Address – View Function

➭ Activate the Del key. No security request appears.

Data record numbering is changed as soon as an individual data
record is deleted.

6.3.2 Deleting a Memory Address – Data Function

➭ Select Data.
➭ Enter blanks to the data fields BUILDING, DISTRIBUTOR CABINET, RCD No.

and CIRCUIT. After all of these fields have been entirely overwritten with
blanks,they are displayed as inverse images.

➭ Acknowledge with the START key (press at center). All data from the

selected memory address are deleted.

START

18 GMC-I Messtechnik GmbH

6.3.3 Delete All Memory Addresses – Data Function

Up to 250 data records can be stored to memory. The memory is full
when the bar graph to the right of “MEMORY:” is entirely filled in. The entire
memory, i.e. all data records from all memory addresses, can be deleted
at once. We recommend uploading and saving your data to a PC before
deletion.

➭ Select Data.

➭ Enter memory address “000”. After acknowledgement by pressing

button START (press at center) a safety request appears.

➭ By simultaneously activating O and K all data that have been saved

are deleted from memory. The bar graph to the right of the parameter
„MEMORY:“ is empty. To the left, memory address „001“ is displayed.
New data can now be entered for the first address, or the
database can be exited (press ↵ or START 9 times).

If the above message appears upon switching on the test instrument, all
data can be saved to a PC before finally deleting the database in order to
rectify the error.

6.4 Print Function

Functions the symbols of which appear in gray or are displayed only in a
faint raster screen, will not be available until after the next software
update.

3x

+

+

GMC-I Messtechnik GmbH 19

7 Measuring Alternating Voltage

Sinusoidal alternating voltage within a frequency range of 40 to 200 Hz
can be measured with the test instrument.

➭ Press the U~/f key.
➭ Contact the measuring points with the measuring probes.

Note

The input impedance for the voltage measuring range is 5 MΩ.

8 Measuring Temperature and Humidity with Adapter Z541A

(Accessory Adapter)

Temperatures within a range of –10.0 ° C to +50.0 ° C, as well as relative
humidity from 10.0% to 90.0% can be measured with the temperature­humidity combination adapter.
➭ Connect the temperature-humidity adapter to the IR interface of the

test instrument (see drawing on page 2) by inserting the guide pin of
the adapter in the opening provided at the top of the test instrument
such that the adapter is located on the two rubber pads in central
position to the housing. Then push the adapter down to fix it tightly.

➭ Press the T/F

REL

key. The adapter is activated via the interface.

➭ Select the desired temperature unit of measure, °C or ° F, wi t h th e

corresponding key. Temperature and humidity are displayed directly.

➭ We recommend moving the test instrument with the adapter to and

fro for a few seconds to enable the adapter to adjust to the prevailing
room climate more quickly. The air current can thus penetrate through
the opening into the adapter housing more quickly. It would otherwise
take several minutes to achieve this condition.

➭ When changing to another function, the adapter is deactivated.
➭ The measured values are only updated every 5 seconds to spare the

adapter batteries.

Display at the Test Instrument

The „———“ symbol shown on the display can be attributed to the fol-
lowing causes:

– incidence of sunlight
– depleted batteries in adapter Z541A
– adapter defective or not properly positioned

Adapter Z541A should not be exposed to intensive sunlight to prevent
inadvertent activation via infrared (battery life!).

20 GMC-I Messtechnik GmbH

9 Measuring Low-Value Resistance (to 100 Ω)

According to the regulations, measurement of low-value resistance at
protective conductors, earth conductors and bonding conductors must
be performed with (automatic) measuring voltage polarity reversal, or with
the flow of current in one direction (+ pole to PE), or the other (– pole to
PE).

Attention!

!

Low-value resistance may only be measured at voltage-free
objects.

Attention!

!

In order to be able to start the measurement, contact must first be
established between the test probes and the device under test.
If voltage is present at the device under test, or if resistance is greater
than 100 Ω, no measurement is performed.

Automatic Polarity Reversal – AUTO± Function

With automatic polarity reversal, the instrument performs measurement
first in one direction and then in the other, after the measuring sequence
has been started.
The largest measured resistance value is always displayed. This
presupposes that AUTO± is displayed underneath R

LO

. If either of
the values RLO/+ or RLO/– is displayed instead of AUTO±, press
the +/− key in the menu bar and then AUTO±.

Resistance values which do not demonstrate stabilized values until after
settling in, should not be measured with automatic polarity reversal.
Measurement with automatic polarity reversal may result in varying,
excessively high measured values and thus to an ambiguous read-out.

Measurement with + Pole to PE, or – Pole to PE

In order to determine whether or not test results are independent of the
direction of flow, measurement can be performed separately in both
directions. Press the +/− key in the menu bar to this end, and then either +
or – depending upon the desired direction of flow.

Differing results indicate that voltage is present at the device under test
(e.g. thermoelectromotive force or elemental voltage).
Measurement results may be distorted by parallel connected impedances
from load current circuits and equalizing current, especially in systems
equipped with “overcurrent protective devices” (formerly neutralization)
without a separate protective conductor. A change in resistance during
measurement (e.g. inductance), or poor contact may also result in
distorted measurements.

The following are examples of resistance values which may change during
measurement :

– Resistance values for incandescent light bulbs due to warming

caused by test current

– Resistance with an excessively high inductive component
In order to assure unambiguous measurement results, it is necessary to
recognize and eliminate any cause of error.

The instrument’s batteries are depleted rapidly during resistance
measurement. Only press the START key as long as necessary during
measurement with current flow in a single direction.

START

GMC-I Messtechnik GmbH 21

9.1 Compensation for Measurement and Extension Cables (up to 10 Ω)

Measurement and extension cable ohmic resistance can be subtracted
automatically from the measurement results. Proceed as follows:

➭ Activate the +/− key in the menu bar.
➭ Short circuit the two test probes at the ends of the measuring cables,

with interconnected extension cables if used.

➭ Activate the Offset key. Cable resistance is displayed to the right of

Offset.

➭ Connect the device under test.
➭ Start low-resistance measurement with the START key. The display

value R

LO

represents the measured value, from which the cable

resistance value R

Offset

has already been subtracted.

9.2 Setting the Limit Value

A resistance limit value can be selected with the “LIMIT” function. If a
measured value exceeds this limit value, the red LIMIT LED lights up.

22 GMC-I Messtechnik GmbH

10 Measuring Contact Current

Substantiation of the absence of voltage can be provided by means of
contact current measurement (DIN VDE 0701 part 240).

➭ Press the I

B

key.

➭ Contact the measuring point with the + Pole and the COM jack with a

protective conductor potential.

Voltage at the Device Under Test: U

B

< 25 V

➭ Briefly press the START key in order to start the measurement.
Contact current I

B

is measured and displayed.

Voltage at the Device Under Test: U

B

> 25 V

➭ Briefly press the START key in order to start the measurement.
Contact voltage U

B

is measured and displayed.

If the START key is press and held, I

B

is measured and displayed.

10.1 Setting the Limit Value

A limit value for contact current can be selected with the LIMIT key. If a
measured value exceeds this limit value, the red LIMIT LED lights up.

START

START

START

GMC-I Messtechnik GmbH 23

11 Characteristic Values

1)

With external adapter Z5414A as accessory

2)

DC nominal voltage = UN +(0 … 15%)

3)

At nominal resistance RN = 1000 Ω/V

Reference Conditions

Ambient Temperature + 23 ° C ±2 K
Relative Humidity 40 ... 60%
Battery Voltage 5.5 V ±1%
Meas. Qty. Frequency 50 Hz ±0.2 Hz
Live Voltage Waveshape sine, deviation between RMS and

rectified values < 1%

Power Supply

Batteries 4 ea. 1.5 V baby cells (4 x C-Size)

(alkaline-manganese per IEC LR14)

or 4 ea. NiCd rechargeable batteries
Nominal Range of Use 4.6 ... 6.5 V
Battery Test symbolic display

Battery Saver Circuit Display illumination can be switched off.

The test instrument switches itself off automati­cally 10 to 60 seconds after the last key opera­tion.
On-time can be selected by the user.

Service Life

for R

ISO

(1000 V/1 MΩ), RLO with 20 s on-time
and one measurement each with a duration of 5 s
– with one set of batteries (alkaline-manganese):

1,600 measurements

– with one set of storage batteries (2200 mAh):

1,000 measurements

Safety Shutdown The instrument is switched off, or cannot be

switched on, if supply voltage has dropped to
below the critical level.

Charging Socket

Inserted rechargeable batteries can be recharged
inside the instrument by connecting the NA102
battery charger (Z501N) to the charging socket.

Measured

Quantity

Display Range Test Current Measuring Range

Nominal Values /

Impedance

Intrinsic Uncertainty

Measuring

Uncertainty

R

ISO

000 kΩ ... 99.9 GΩ

1 mA

3)

20 kΩ … 10.0 GΩ UN = 100 V

2)

±(5% rdg. + 3 d) ±(7% rdg. + 3 d)

0.20 MΩ … 10.0 GΩ U

N

= 250/500/1000 V

2)

±(5% rdg. + 3 d) ±(7% rdg. + 3 d)

> 10.0 GΩ … 99.9 GΩ U

N

= 100/250/500/1000 V

2)

±(8% rdg. + 3 d) ±(10% rdg. + 3 d)

U

ISO

000 V ... 1.20 kV

50 … 1.00 kV 5 MΩ

±(2.5% rdg. + 3 d) ±(5% rdg. + 3 d)

U~

00.0 V ... 500 kV 10 … 500 V 5 MΩ±(2.5% rdg. + 3 d) ±(5% rdg. + 3 d)

f

15.0 … 400 Hz 45 … 200 Hz 5 MΩ±(0.5% rdg. + 2 d) ±(1% rdg. + 2 d)

R

LO

0.00 ... 9.99 Ω IN = 200 mA 0.15 … 10 Ω
U

0

= 4.5 V

±(2.5% rdg. + 3 d) ±(5% rdg. + 3 d)

> 10.0 ... 99.9 Ω > 10 ... 100 Ω±(8% rdg. + 3 d) ±(10% rdg. + 3 d)

I

B

0.00 μA … 9.99 mA 0.1 … 10 mA AC 2 kΩ±(5% rdg. + 3 d) ±(6% rdg. + 3 d)

T

1)

–10.0 … + 50.0 ° C0 … + 40 ° C ±2 °C

F

rel

1)

10.0 … 90.0 % 20 … 80 % ±5%

Phase Test LED PE > 100 V 100 … 500 V > 100 MΩ/50 Hz

24 GMC-I Messtechnik GmbH

Overload Capacity

R

LO

Electronic protection disables start-up if
interference voltage is present.

U~ 500 V~ continuous

Electrical Safety

Standard IEC 1010-1:1990, IEC 1010-1/A2:1995

EN 61010-1:1993, EN 61010-1/A2:1995
VDE Requirement VDE 0411 Part 1, 1994-03
Safety Class II
Polution degree 2
Measuring Category Insulation measurement – 1000 V DC –

no overvoltage

Voltage measurement – 500 V – CAT II
Fuses FF0.315-1000G

Electromagnetic Compatibility EMC

Interference Emission EN 61326:2002 Class B
Interference Immunity

EN 61326:

2002
EN 61000-4-2: 1995/A1: 1998 Feature A
EN 61000-4-3: 1995/A1: 1998 Feature B

Ambient Conditions

Nominal Temperature 0 ... +40 ° C
Operating Temperature –10 ... +50 ° C
Storage Temperature –20 ... +60 ° C (without batteries)
Relative Humidity to 75% (max. 85% for storage and transport),

no condensation allowed

Elevation max. 2000 m
Deployment indoors; outdoors only under the specified

ambient conditions

Mechanical Design

Display multiple dot matrix display

128 x 64 pixels (65 mm x 38 mm), illuminated

Dimensions 275 mm x 140 mm x 65 mm
Weight approx. 1.2 kg with batteries

Protection

Housing IP 52 per DIN VDE 0470 Part 1/EN 60529
with pressure compensating diaphragm made of
microporous ePTFE, non-aging, diam. 8 mm in
battery compartment cover

Extract from table on the meaning of IP codes

Data Interface

Type infrared interface (SIR/IrDa)

bidirectional, half-duplex

Format 9600 baud, 1 start bit, 1 stop bit, 8 data bits,

no parity, no handshake

Range max. 10 cm, recommended: < 4 cm

Display Values including Allowances for Measuring Error

Table for the determination of minimum display values for insulation resistance
by making allowances for the instrument’s measuring error.

IP XY

(1

st

digit X)

Protection against

foreign object entry

IP XY

(2nd digit Y)

Protection against

entry of water

2 ≥ 12.5 mm

∅

2 drops (with enclosure tilted 15°)

3 ≥ 2.5 mm

∅

3 spraying water

4 ≥ 1.0 mm

∅

4 splashing water
5 dust protected 5 water jets
6 dust-tight 6 powerful water jets

Limit Value

Minimum

Display Value

Limit Value

Minimum

Display Value

020 kΩ 025 kΩ
100 kΩ 111 kΩ 100 MΩ 111 MΩ
200 kΩ 219 kΩ 200 MΩ 219 MΩ
500 kΩ 541 kΩ 500 MΩ 541 MΩ

0.20 MΩ 0.25 MΩ

0.50 MΩ 0.57 MΩ

1.00 MΩ 1.11 MΩ 1.00 GΩ 1.11 GΩ

2.00 MΩ 2.19 MΩ 2.00 GΩ 2.19 GΩ

5.00 MΩ 5.41 MΩ 5.00 GΩ 5.41 GΩ

10.0 MΩ 11.1 MΩ 10.0 GΩ 11.1GΩ

20.0 MΩ 21.9 MΩ 20.0 GΩ 22.6 GΩ

50.0 MΩ 54.1 MΩ 50.0 GΩ 55.9 GΩ

GMC-I Messtechnik GmbH 25

Table for the determination of maximum display values for low resistances by
making allowances for the instrument’s measuring error.

12 List of Abbreviations and their Meanings

Voltage

U Test voltage or nominal voltage
U

ISO

Rising test voltage for insulation testing

U~ Measured voltage (sinusoidal alternating voltage)

Temperature / Atmospheric Humidity

T / ϑ Temperature
F

REL

Relative atmospheric humidity

Resistance, Contact Current

LIMIT Limit value for insulation resistance, low-value resistance or

contact current

Offset Correction value of resistance for measurement cables
R

INS

Insulation resistance

R

LO

Low-value resistance (cable resistance)

13 Maintenance

13.1 Self-Test

➭ The self-test is started from the main menu with the Tes t key. The test

has a duration of several seconds.

The following information is displayed in the two headers:

Typ e/ Ca l: Device type / date of last calibration
Version: Software version and issue date

Self-tests for the items Chksum through LED are performed automatically,
one after the other, and are checked off or marked with a horizontal dash
if they are not passed.

Chksum1/2: Status display for internal testing (Each test must be

completed with a check mark. If not, the measuring and
test instrument may no longer be used. Please contact our
service center in this case.)

Relays: Each relay is switched twice.
LED: The U, LIMIT and NETZ/MAINS lamps each blink twice in red.

The PE lamp cannot be tested automatically!

As soon as the tests in the left-hand column have been completed, the
following tests must be started manually:

Limit Value

Maximum

Display Value

Limit Value

Maximum

Display Value

0.15 Ω 0.11 Ω

0.20 Ω 0.16 Ω 5.00 Ω 4.72 Ω

0.50 Ω 0.44 Ω 10.0 Ω 9.47 Ω

1.00 Ω 0.92 Ω 20.0 Ω 17.7 Ω

2.00 Ω 1.87 Ω 50.0 Ω 44.7 Ω

26 GMC-I Messtechnik GmbH

➭ Illum: Press the Test key twice in order to activate and deactivate

display illumination.

➭ Display: Press the Test key after each test pattern appears in order to

check the display elements.

➭ Keytest: Perform the key test by pressing each of the softkeys once,

and by pressing the start key once in each of its three positions. The
keys appear filled in at the key pictograph after they have been tested.

Individual tests can be skipped by pressing the skip key before starting the
respective test. These tests are then identified with a horizontal dash, as is
also the case for tests which have not been passed.

13.2 Battery Operation

When only one solid segment remains in the battery symbol, the batteries
must be replaced, or recharged if rechargeable batteries are used.

Check the batteries at short, regular intervals or after lengthy periods of
storage to make sure no leakage has occurred. If leakage has occurred,
the electrolyte must be carefully and completely removed from the
instrument with a damp cloth before new batteries are installed.

Charging the Batteries

Attention!

!

Use only the NA102 battery charger (article no. Z501N) with safe
electrical isolation and a nominal secondary voltage of 9 V DC to
recharge the batteries.
Before connecting the battery charger to the charging socket at
the device, make sure of the following points:
– Rechargeable batteries have been installed (not normal batteries).
– The instrument has been disconnected from the measuring

circuit at all poles.

– The voltage selector at the charger has been set to 9 V.

Connect the NA102 battery charger to the charging socket with the

3.5 mm jack plug. Set the voltage selector switch at the NA102 to 9 V.
Switch the test instrument on.
The test instrument recognizes the fact that a battery charger has been
connected and starts the charging cycle. The 5 segments of the battery
symbol are continuously displayed in a sweeping pattern from left to right
for the entire duration of the charging cycle.

Depleted batteries require a charging cycle of approximately 14 hours. If
the batteries are exhausted to a great enough extent, the test instrument
can no longer be switched on. If this is the case, leave the test instrument
connected to the activated battery charger for about 30 minutes, and
then proceed as described above.

13.3 Changing the Batteries of the Temperature and Humidity Measuring
Adapter Z541A

Separate the bottom part of the housing from the top to change the bat­teries.
➭ Untighten the screw at the bottom of the housing and remove the

housing lid.

➭ Insert two 1,5 V round cells of type LR1 (size N) in the battery com-

partment according to the indicated polarity symbols.

➭ Replace the housing lid (the opening at the bottom of the housing and

the thread of the screw must be on top of each other) and press the
lid until it engages. Retighten the screw carefully.

13.4 Fuses

If a fuse has blown due to an overload, an appropriate error message
appears at the LCD. However, the instrument’s voltage measuring ranges
are still functional.

Attention!

!

Disconnect the instrument from the measuring circuit before ope­ning the cap for replacing the fuse!

GMC-I Messtechnik GmbH 27

Replacing Fuses

➭ Remove the cap for the respective fuse with the help of a suitable tool

(e.g. screwdriver) by pressing and turning counterclockwise.

Attention!

!

Incorrect fuses may cause severe damage to the test instrument.

Only original fuses from GMC-I Messtechnik GmbH
assure the required protection by means of suitable
breaking characteristics (article no. 3-578-222-02).
Bridging or repairing fuses is prohibited!
The instrument may be damaged if fuses with other current
ratings, blowing or breaking characteristics are used!

➭ Remove the defective fuse and replace it with a new replacement

fuse. Replacement fuses are located in the battery compartment.

➭ Insert the new fuse and the cap together, and lock into place by

turning clockwise.

➭ Replace the battery compartment cover and secure it with the

screws.

13.5 Housing

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

Device Return and Environmentally Compatible 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 not subject to the RoHS directive.
We identify our electrical and electronic devices (as of August

2005) in accordance with WEEE 2002/96/EG and ElektroG
with the symbol shown to the right per DIN EN 50419 .
These devices may not be disposed with the trash. Please
contact our service department regarding the return of old devices.

14 Repair and Replacement Parts Service

DKD Calibration Center* and Rental Instruments Service

If required please contact:

GMC-I Service GmbH

Service Center

Thomas-Mann-Straße 20
90471 Nürnberg, Germany
Phone: [phone]
Fax: [phone]

E-mail [e-mail]
This address is for Germany only.
Abroad, our representatives or establishments are at your disposal.

* Calibration Laboratory for Electrical Quantities DKD– K –19701

accredited per DIN EN ISO/IEC 17025:2005

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

Competent Partner

GMC-I Messtechnik GmbH is certified in accordance with
DIN EN ISO 9001:2000.
Our DKD calibration laboratory is accredited by the Deutscher
Kalibrierdienst (German Calibration Service) in accordance with
DIN EN ISO/IEC 17025:2005 by under registration number
DKD–K–19701.

We offer a complete range of expertise in the field of metrology: from test

reports and proprietary calibration certificates right on up to DKD calibration
certificates.

Our spectrum of offerings is rounded out with free test equipment manage­ment. An on-site DKD calibration station is an integral part of our service

department. If errors are discovered during calibration, our specialized
personnel are capable of completing repairs using original replacement
parts. As a full service calibration laboratory, we can calibrate instruments
from other manufacturers as well.

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

Telefon[phone]
Telefax [phone]
E-Mail [e-mail]
www.gossenmetrawatt.com

15 Product Support

If required please contact:

GMC-I Messtechnik GmbH

Product Support Hotline

Phone: [phone]
Fax: [phone]
E-Mail [e-mail]