Gossen Metrawatt METRALINE RCDCHECK Operating Instructions

Operating Instructions

METRALINE RCD

RCD Test Instrument

CHECK

3-349-694-03

3/6.13

Contents Page

!

1 Introduction ...................................................................... 2

1.1 Scope of Delivery ...........................................................................2

1.2 Optional accessories ......................................................................2

1.3 Safety Precautions .........................................................................2

1.4 Applications ..................................................................................3

1.5 Applicable Standards .....................................................................3

1.6 Environment ..................................................................................3

2 Device Description ........................................................... 3

2.1 Housing ........................................................................................3

2.2 Operation and OLED Display ...........................................................4

2.3 Initial Start-Up ...............................................................................4

3 Performing Measurements .............................................. 4

3.1 Switching the Instrument On and Off ...............................................4

3.2 Instructions and Principles with Validity for

All Measurements ..........................................................................4

3.3 Adjustable Parameters ...................................................................5

3.4 Measuring the Individual Parameters of an RCD ...............................6

3.4.1 Touch Voltage Uc ...........................................................................6

3.4.2 Time to Trip – TIME .......................................................................6

3.4.3 Tripping Current I ..........................................................................7

3.5 Further Device Functions ................................................................7

3.6 Device Reset Function ....................................................................7

4 Technical Data ................................................................. 8

4.1 Measuring Functions ......................................................................8

4.2 General Data .................................................................................8

5 Maintenance .................................................................... 9

5.1 Device Power Supply .....................................................................9

5.1.1 Inserting and Replacing the Batteries ..............................................9

5.1.2 Recharging the Batteries ................................................................9

5.1.3 Fuse Replacement .........................................................................9

5.2 Cleaning .......................................................................................9

5.3 Recalibration ...............................................................................10

6 Repair and Replacement Parts Service,

Calibration Center and Rental

Instrument Service ......................................................... 10

7 Product Support ............................................................. 10

1 Introduction

1.1 Scope of Delivery

1 Test instrument with mobile test probe
4 Batteries (AAA)
1Pouch
1 Condensed operating instructions
1 CD ROM with operating instructions in available languages
1 Factory calibration certificate

1.2 Optional accessories

4 ea. rechargeable AAA NiMH batteries (Z507B)
1 battery charger (Z507A)

1.3 Safety Precautions

Read the operating instructions thoroughly and carefully before
using your instrument. Follow all instructions contained therein.
Make sure that the operating instructions are available to all users
of the instrument.

Meanings of Symbols on the Instrument

This device is equipped with double
or reinforced insulation.

Danger of injury due to electrical current,
warning regarding dangerous electrical voltage

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

EC mark of conformity: This instrument fulfills all require­ments of applicable European directives.

Before using the instrument, it must be assured that it is safe. Do
not use if:

• Visible damage is apparent

• The battery compartment lid is missing

• The device has been stored under unfavorable conditions for
a lengthy period of time

• The device has been handled impermissibly, e.g. has been
dropped from a height of 1 meter or more

• The test instrument does not function as described in these
operating instructions (if this is the case, we recommend
resetting the device as described in section 3.6 on page 7)

CAUTION

• Do not touch electrically conductive parts, test probes etc.
when the device is switched on and voltage might still be con­ducted by a test probe – DANGER OF INJURY!

• Only use test probes which are included with the instrument
or are available as accessories.

• The device must be switched off and no voltage may be
applied when exchanging accessories.

• It is absolutely essential to adhere to all safety precautions,
regulations and standards when performing measurements.

• No keys may be pressed when connecting the instrument to a
device under test.

• The test instrument may not be subjected to the influence of
aggressive substances, gases, vapors, liquids or dust.

• The test instrument may only be used under the conditions
listed in the technical data in section 4 on page 8.

• If the device is moved from a colder to a warmer room, con­densation may occur, in which case a brief period of acclima­tization is advisable.

• We recommend removing the batteries during lengths periods
of storage.

• Two relatively strong magnets are integrated into the test
instrument. Avoid close proximity to magnetically sensitive
objects such as watches, credit cards and the like.

• The illustrations in these operating instructions are drawings
and may therefore deviate from reality.

2 GMC-I Messtechnik GmbH

Exclusion of Liability

!

Fixed Test Probe Attached to the Device

LED

OLED Display

Socket for Flexible Test Probe

Socket for Charger

P

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M

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T

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Plastic

Control Panel

Housing

Screws for Battery Compartment Lid

Battery Compartment Lid

Serial Plate

When testing systems with RCCBs, the latter may switch off. This
may occur even though the test does not normally provide for it.
Leakage currents may be present which, in combination with the
test current of the test instrument, exceed the shutdown thresh­old value of the RCCB. PCs which are operated in proximity to
such RCCB systems may switch off as a consequence. This may
result in inadvertent loss of data. Before conducting the test, pre­cautions should therefore be taken to ensure that all data and
programs are adequately saved and the computer should be
switched off, if necessary. The manufacturer of the test instru­ment assumes no liability for any direct or indirect damage to
equipment, computers, peripheral equipment or data bases when
performing the tests.

• Use original accessories only.

• Maximum permissible voltage between test probe and ground
is 300 V!

• Maximum permissible (externally applied) voltage between the
test probes is 600 V!

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.

1.4 Applications

The test instrument is enclosed in a compact housing with a pat­ented means of retaining the test probes.

The high-contrast, four-color OLED display assures excellent legi­bility. When performing measurements under unfavorable light
conditions, measuring point illumination can be switched on –
white LED at the front.

2 Device Description

2.1 Housing

Figure 2.1: Top View

For transport purposes, the movable test probe can be attached
to the housing and retained by a magnet such that both metal tips
are simultaneously recessed and protected.

In order to charge batteries which have been inserted into the
instrument, the flexible test probe’s connector plug must be
removed and the slide must be pushed to the left, so that the
socket at the right is made accessible and the charger can be
plugged into it.

The RCD test instrument is capable of the following measure­ments:

– RCD disconnection time
– RCD breaking current
–Touch voltage
– Loop impedance without tripping the RCD
– Phase detection

1.5 Applicable Standards

Measurement EMC Safety

EN 61557-1 EN 55022 class B EN 61010-1
EN 61557-6 EN 61326-1 EN61010-031

1.6 Environment

The shipping package is made of recyclable cardboard. Batteries
must be disposed of in accordance with applicable regulations.

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 by entering
the search term “WEEE”.

Figure 2.2: Detail View of the Back Panel with Battery Compart-

ment Lid

GMC-I Messtechnik GmbH 3

2.2 Operation and OLED Display

Note

3

1

2

4

5

6

Battery Display

Measuring

IN and

Temperature Display

RCD Type

Ancillary

Main
Reading

Function

IN

Value

Multi­pliers

Waveform

1 Graphic OLED display
2 START key:

– Switch on:
Press and hold until the display
lights up.
– Start measurement:
Press and hold until measurement
starts. Briefly pressing starts mea­surement if voltage is applied to the
test probes (exception for Uc: is dis­played immediately after voltage is
applied).
– Measurement point illumina-
tion:
Press briefly to switch illumination
on and off.
– Switch off:
Press twice briefly to switch the
instrument off.

3 FUNC key for selecting the following

measuring functions: Uc, TIME,

I

4 IN key for selecting nominal

residual current

5 TYPE key:

– Uc function:
RCD Type Selection
– TIME function:
Selection of waveform and initial polarity of the residual current, as well as
RCD type
– I function :
Selection of waveform and initial polarity of the residual current

6 xIN key

– Uc function:
Selection of the touch voltage limit value
– TIME function: selection of a multiplier for nom. residual current

Figure 2.3: Control Panel and OLED Display

3.2 Instructions and Principles with Validity for All Measurements

Setting Parameters

The desired functions or parameters are selected with the FUNC,
IN, TYPE and xIN keys (see section 3.3). Measurement is trig-

gered by pressing the START key. All selected functions or param-
eters remain valid until they are changed.

Interference Voltage

If (interference) voltage of less than 190 V or greater than 255 V is
applied to the test probes, corresponding information appears at
the display. If this is the case, the START key is disabled.

Figure 3.1: Display of (Inter-

ference) Voltage
<190V

Figure 3.2: Display of (Inter-

ference) Voltage
>255V

Blown Fuse

If line voltage is applied to the test probes, and if the fuse is either
blown or has not been inserted, this is indicated at the display.

Figure 3.3: Blown Fuse Display

The fuse must be replaced as described in section 5.1.3.

If a voltage within a range of 25 to 190 V is applied to the
test probes, the blown fuse symbol is also displayed at
the instrument even if the fuse is OK. For this reason,
make sure that voltage in the measured electrical circuit is
really less than 190 V before replacing the fuse.

Figure 2.4: Example of Displayed Information

The information which appears at the display varies depending on
the selected function.

2.3 Initial Start-Up

After inserting the batteries in accordance with section 5.1 on
page 9, the measuring instrument is ready for operation.

3 Performing Measurements

3.1 Switching the Instrument On and Off

The instrument is switched on by pressing and holding the START
key. Briefly press the START key twice in order to switch the
instrument off, during which no voltage may be applied to the test
probes! The instrument is switched to the standby mode after
several seconds (reduced brightness), if none of the keys has
been pressed and no voltage is applied to the test probes. The
instrument is switched out of the standby mode (i.e. back to full
brightness) by pressing any key or applying voltage to the test
probes. The instrument is shutdown automatically if it has
remained inactive for about 1 minute, i.e. if no keys have been
pressed and no voltage has been applied to the test probes dur­ing this time.

4 GMC-I Messtechnik GmbH

Prerequisites for RCD Measurement

• If a voltage within a range of 190 to 255 V is applied to the test

probes, the TRMS value appears at the display and measure­ment can be triggered by pressing the START key.

Figure 3.4: Example of a Voltage Measurement

• For safety reasons, the test instrument first determines

whether or not touch voltage Uc is higher than the selected
limit value each time the START key is pressed before measur­ing RCD parameters. If the limit value is exceeded, this is indi­cated at the display and the measurement is ended.

Figure 3.5: Touch Voltage

TEST

✓

S

>50V

Figure 3.6: Touch Voltage

>25V

Tripping During Touch Voltage Measurement

If the display shown in figure 3.7 appears after pressing the START
key, the RCD has been tripped during touch voltage measure­ment. This can be caused by an incorrectly adjusted nominal cur­rent value IN, by a defective RCD or by previously existing leak­age current via the RCD. This status is displayed until one of the
function selection keys is pressed, or the device is once again
connected to mains power.

Figure 3.7: Example of Display for Tripping During Touch

Voltage Measurement

Low Battery Voltage

If battery voltage is too low (only the red field is lit up in the battery
symbol), measurement cannot be triggered with the START key. If
the key is nevertheless pressed, the depleted battery symbol is
displayed for about 1 second. The instrument is then returned to
its previous status. Replace the batteries with new ones or
recharge them as described in section 5.1.

Figure 3.8: Battery Voltage

Too L o w

Figure 3.9: Battery Status

After Pressing the
START Key

Overheating

If several measurements with high IN values are performed one
after the other, the red field indicates internal warming of the
instrument. As temperature increases, the red field is gradually
filled in and becomes wider. An inversely displayed STOP symbol
appears when the maximum permissible temperature is
exceeded. If the START key is pressed, the overheating symbol
appears for about 1 second and further measurements are dis­abled. The instrument is then returned to its previous status which
prevailed before the START key was pressed. Allow the test instru­ment to cool down, which is indicated by the shrinking tempera­ture display.

Performing the Measurement

Securely contact the device under test with the test probes before
triggering the measurement by pressing the START key. After­wards, check to see whether or not the displayed line voltage
value is stable. Do not remove the test probes from the device
under test during measurement. Measurement results might oth­erwise be distorted.

Influences on Measurement Results

• Current flowing via PE has an unfavorable influence on mea­surement results, or makes measurement entirely impossible,
due to, for example, consuming devices or capacitance
between L and PE. Consuming devices of this sort should
therefore be removed prior to measurement.

• Measurement results can be influenced by several factors:
– Leakage current in the measured electrical circuit
– Interference voltage occurring in an earthing system
– When the earthing system is influenced by the potential

of another earthing system

– Fluctuating line voltage

If the symbol shown at the right appears together with
the measurement results, the measurement results for
the respective function lie within the specified limit val­ues.

3.3 Adjustable Parameters

•The limit value for touch voltage Ucmax can be set to either 50 V
or 25 V. Adjust with the xIN key when the touch voltage mea­surement function (Uc) has been activated with the FUNC key.

•The nominal value for residual current can be set to one of the
following values with the IN key: 10 mA, 30 mA, 100 mA,
300 mA or 500 mA.

•The residual current multiplier can be set to a value of ½, 1, 2 or
5 for 10, 30 and 100 mA, or to ½ or 1 for 300 and 500 mA
with the xIN key, after the TIME function has been activated
with the FUNC key.

• RCD type: Residual current waveform and polarity are selected
with the TYPE key.

Display
Symbol

Display
Symbol

Refer to the technical data in section 4 for further details.

RCD Type
(residual current waveform)

AC (sinusoidal)

A (pulsed)

RC D Ty pe RC D Ty pe

AC or A

Initial Polarity of the Re­sidual Current

Positive half-wave

Negative half-wave

Positive half-wave

Negative half-wave

Standard

Selective

Bild 3.10 STO P: Indication

of Overheating

Figure 3.11: Indication of Over-

heating After
Pressing the
START Key

GMC-I Messtechnik GmbH 5

3.4 Measuring the Individual Parameters of an RCD

Note

RCD type Contact voltage is

proportional to:

1,05 I



N

1,05 2  I



N

1,05

2

 I



N

1,05 2x

2

 I



N

3.4.1 Touch Voltage Uc

The displayed touch voltage refers to nominal residual current. For
safety reasons, it is multiplied by the following coefficients:

➭ Select the Uc function with the FUNC key.
➭ The nominal value for residual current can be set with the IN

key.

➭ RCD type is selected with the TYPE key.
➭ The limit value for touch voltage Uc is adjusted with the xIN

key.

RL … fault loop impedance; R
measured touch voltage, i.e. without a safety coefficient from the

= Uc*/ IN, where Uc* is actually

L

table at the beginning of this section.

The value for fault loop impedance appears at the display
if residual current IN is set to  30 mA.

➭ Remove the test instrument from the RCD under test.

3.4.2 Time to Trip – TIME

The following table shows time to trip in accordance with the
EN 61008, EN 61009 and IEC 60364-4-41 standards:

½ IN *I

Standard

Selective

* An RCD may not trip at ½ IN.

N

—

300 ms 150 ms 40 ms max. permissible

—

500 ms 200 ms 150 ms

—

130 ms 60 ms 50 ms min. permissible

➭ Select the TIME function by pressing the FUNC key.
➭ The nominal value for residual current can be set with the IN

key.

➭ RCD type is selected with the TYPE key.
➭ Select a multiplier with the help of the xIN key.

2 I

N

5 I

N

Comment

tripping current

tripping current

Figure 3.12: Example: Settings for Touch Voltage Measurement

➭ Connect the instrument to L and PE downstream from the

RCD as shown below. Example:

Figure 3.13: Connection Example

➭ After voltage value U

to trigger the measurement.

settles in, briefly press the START key

L-PE

Figure 3.15: Example: Settings for Time to Trip Measurement

➭ Connect the instrument to L and PE downstream from the

RCD as shown in figure 3.13.

➭ After voltage value U

to trigger the measurement.

settles in, briefly press the START key

L-P E

After the measurement has been completed, the results are dis­played as follows:

Figure 3.16: Results of the

Time to Trip Mea­surement

Figure 3.17: Results when the

RCD is not
Tripped

Uc (touch voltage) … touch voltage value

➭ Remove the test instrument from the RCD under test.

After the measurement has been completed, the results are dis­played as follows:

Comment: Selective RCDs include a delay element which makes it
necessary to wait for a certain amount of time after each mea­surement until the RCD is returned to its initial state. A 30 second
pause is therefore specified for the measurement of selective
RCDs, the progress of which appears at the display in the form of
a countdown timer which runs from 30 seconds to 1 second:

Figure 3.14: Results of a Touch Voltage Measurement

6 GMC-I Messtechnik GmbH

3.5 Further Device Functions

X

L

Phase Detection

If the symbol shown at the right appears in the lower right­hand corner of the display, and if a phase is contacted with
the fixed test probe, the symbol is changed:

Figure 3.18: Example: Waiting Time for Measuring Selective

RCDs

3.4.3 Tripping Current I

➭ Select the I function by pressing the FUNC key.
➭ Set residual current with the IN key.
➭ RCD type is selected with the TYPE key.

Figure 3.19: Settings for the Tripping Current Measurement

➭ Connect the instrument to L and PE downstream from the

RCD as shown in figure 3.13section "Connection Example".

➭ After voltage value U

to trigger the measurement.

After the measurement has been completed, the results are dis­played as follows:

settles in, briefly press the START key

L-PE

The other test probe may not be connected anywhere or make
any contact at all!

Figure 3.22: No Phase Voltage Figure 3.23: Phase Voltage

Note

As usual, the test instrument must be gripped in the hand!
Phase voltage to earth must be  190 V at 45 to 65 Hz – dis-

played results are otherwise not reliable.

Querying the Firmware Version

Before querying the firmware version, disconnect both test
probes from the device under test / measuring circuit, and switch
the test instrument off.

➭ Press and hold the FUNC key while switching the test instru-

ment on by pressing and holding the START key.

The firmware version appears at the display.
➭ The display is returned to the standard menu when the FUNC

key is released.

Figure 3.20: Tripping Current

Measurement
Results

Uc (touch voltage) … touch voltage value

➭ Remove the test instrument from the RCD under test.

Figure 3.21: Example: RCD is

Not Tripped

3.6 Device Reset Function

If the test instrument does not function as described in these
instructions, we recommend a device reset. The test instrument
must be switched off and neither of the test probes may be con­nected to a DUT. If device functions are still incorrect after switch­ing the instrument back on again, remove the batteries as
described in section 5.1 on page 9, wait at least 10 seconds and
then reinsert the batteries (or replace them with new ones).

If the test instrument still does not function as described, remove
the batteries and contact our service department (see section 6).

GMC-I Messtechnik GmbH 7

4 Technical Data

4.1 Measuring Functions

Residual Current Devices (RCD) – General Specifications

Nom. residual current 10, 30, 100, 300, 500 mA
Deviation from nominal

residual current (–0/+0.1)I; I= I
Waveform of the nom.

residual current Sinusoidal (AC), pulsating DC (A)
RCD type Standard and selective S
Initial polarity of

the residual current 0° or 180°
Voltage range 190 V to 255 V / 45 to 65 Hz

, 2x IN, 5x I

N

N

Tripping Current I

Range per EN 61557-6

Measuring Range
for I

0.4 to 1.1 I
(type: AC)

0.4 to 1.5 I
(type: A)

Resolution Intrinsic Uncertainty Measuring

N

N

0.1 mA 0.08 IN 0.1 IN

Uncertainty

Alternating Voltage (frequency range: 45 to 65 Hz)

Measuring Range Resolution Intrinsic Uncertainty Measuring

190 to 255 V 0.1 V (2% rdg. + 2 D) (3% rdg. + 3 D)

Uncertainty

Residual Current Generated by the Tester (TRMS value at 20 ms):

½ I

N

IN

AC A AC A AC A AC A AC A

(mA)

10 5 3.5 10 20 20 40 50 100

30 15 10.5 30 42 60 84 150 212

100 50 35 100 141 200 282 500 —

300 150 105 300 424 — — — —

500 250 175 500 — — — — —

I

N

2 x I

N

5 x I

N

I

✓✓
✓✓
✓✓
✓✓

—

✓

Touch Voltage Uc and Uci

Nominal range per EN 61557-6 – 3.0 to 49.0 V for a touch volt­age limit value of 25 V

Nominal range per EN 61557-6 – 3.0 to 99.0 V for a touch volt­age limit value of 50 V

Measuring
Range

0.0 to 9.9 V

10.0 to 99.9 V -0/+10% rdg. -0/+10%) rdg. + 1 D

Resolution Intrinsic Uncertainty Measuring

0.1 V

-0/+10% rdg. + 2 D -0/+10% rdg. + 3 D

Uncertainty

Impedance of the Fault Loop RL

Nominal range per EN 61557-3 – 27  to 2000 

Measuring
Range

0 to 2000  1  (5%rdg.+3D+0.05V/

Measuring current: ½ I

Resolution Intrinsic Uncertainty Measuring Uncertainty

IN) (5%rdg.+5D+0.05V/IN)

N

The results of the fault loop impedance measurement appear at
the display if nominal residual current is set to I

N  30 mA.

Time to Trip – TIME

Standard Residual Current Circuit Breaker (range per EN 61557-6):

Measuring Range Resolution Intrinsic Uncertainty Measuring

0 to 300 ms
(½I

N, IN)

0 to 150 ms

N)

(2x I

0 to 40 ms

N)

(5x I

1 ms  3 ms 4 ms

Selective Residual Current Circuit Breaker (range per EN 61557-6):

Measuring Range Resolution Intrinsic Uncertainty Measuring

0 ... 500 ms

N, IN)

(½I

0 ... 200 ms

N)

(2x I

0 ... 150 ms

N)

(5x I

1 ms  3 ms 4 ms

Uncertainty

Uncertainty

Key

a) In the case of alternating quantities, the TRMS voltage value is

measured.

b) The measuring uncertainties specified here are only valid if line

voltage is stable during measurement, the earthing system is
free of interference voltage, there are no influences caused by
potential from neighboring systems and no leakage current
flows through the measured electrical circuit.

c) rdg. means reading, i.e. measured value, D = digits (i.e. num-

ber of the decimal place with the least significance)

4.2 General Data

Reference Conditions

Temperature 23 ± 2° C
Relative humidity 40 to 60%
Device position any

Ambient Conditions

Operating Conditions

Operating temperature

0 to 40° C
Relative Humidity max. 85%, no condensation allowed
Device position any

Storage Conditions

Temperature -10 to 70° C
Relative Humidity max. 90% at -10 to +40° C

max. 80% at +40 to +70° C
Device position any

Power Supply

Batteries 4 ea. AAA (LR03), 1.5 V alkaline or

Number of
measurements with batteries at 800 mAh:

1.2 V NIMH (with at least 750 mAh)

approx. 3,000 measurements

Electrical Safety

Measuring category with safety cap applied to measuring

probe: CAT II I 300 V

without safety cap applied to measuring

probe: CAT I I 300 V
Pollution degree 2
Protection class II
Fuse SIBA ceramic fuse

6.3 mm x 32 mm, F1 A/600 V

switching capacity 50 kA at 600 V

Mechanical Design

Display OLED, multicolored, graphic
Protection IP 43
Dimensions approx. 260 x 70 x 40 mm
Weight approx. 0.36 kg with batteries

8 GMC-I Messtechnik GmbH

5 Maintenance

Caution: Dangerous Voltage!

Note

Attention!

!

Attention!

!

Attention!

!

5.1 Device Power Supply

Dangerous voltage in battery compartment!

Before Opening the Battery Compartment Lid
Remove the test probes from the device under test and
switch the instrument off before opening the battery com­partment lid.

Operate Only With Inserted Battery Compartment Lid

The instrument may not be placed into service if the battery
compartment lid has not been inserted and secured with
the screws.

Either alkaline batteries or rechargeable NiCD/NiMH batteries may
be used to supply the instrument with electrical power (4 each,
size: AAA, type: LR03).

The battery charge level is continuously displayed (see section

3.2).
If too little voltage is indicated, replace the batteries.

We recommend removing the batteries during lengthy
periods of non-use (e.g. vacation). This prevents exces­sive battery depletion or leakage, which may result in
damage to the instrument under unfavorable conditions.

5.1.1 Inserting and Replacing the Batteries

Loosen the two screws for the battery compartment lid at the
back of the instrument and remove the lid. Insert the batteries.
Assure correct battery polarity (refer to the embossed symbols at
the bottom of the battery compartment).

5.1.2 Recharging the Batteries

Use only the charger (Z507A) which is offered as an op­tional accessory for this instrument to charge the batter-

ies inserted in the instrument.
Make sure that the following conditions have been fulfilled be­fore connecting the charger to the charging socket:

– rechargeable batteries have been inserted with correct

polarity, no normal batteries

– The test instrument has been disconnected from the

measuring circuit at all poles

– The instrument must remain off during charging.

Recharging of the batteries begins as soon as the charger is con­nected to the mains and to the charging socket (see figure 2.1).
Charging takes approximately 5 hours and 30 minutes (integrated
safety timer) if the batteries have been fully depleted.

Safety Precautions

• Do not attempt to recharge alkaline batteries: they may leak,
explode etc. The test instrument may be severely damaged or
destroyed as a result.

• After initially charging new batteries and after rechargeable
batteries have not been used for a lengthy period of time (sev­eral months), operating hours after charging may be signifi­cantly less than usual. If this is the case, repeat the charging
procedure several times.
Autonomous, intelligent charging stations execute charging/
discharging cycles of this sort automatically (see instructions
included with the charging station). This procedure increases
the capacity of the batteries, thus making longer periods of
operation possible between charging cycles.

• If no improvement is achieved in this way, one or more of the
rechargeable batteries may no longer fulfill the original specifi­cations. If this is the case, the defective rechargeable battery
should be identified, e.g. with the help of the voltage measure­ment, and replaced.

• Battery capacity is gradually reduced as a result of long and
frequent use. When you notice that this is the case, all of the
rechargeable batteries should be replaced.

Figure 5: Correct Battery Polarity

Always replace all four batteries at once, and use high quality bat­teries. Replace the battery compartment lid and retighten the
screws.

5.1.3 Fuse Replacement

The fuse may only be replaced with the fuse type speci­fied in section "Technical Data":
If any fuse other than the one specified is inserted into
the instrument, this may result in damage to the instru­ment and/or danger for the user!

The fuse is in the battery compartment.
➭ Loosen the two screws for the battery compartment lid and

remove the lid. Remove the blown fuse from the fuse holder
and replace it with a new one. Replace the lid and retighten
the screws. Check the instrument for correct functioning!

5.2 Cleaning

Use a soft cloth and soapy water for cleaning. Do not place the
test instrument back into service until its surface is completely dry.

Do not use cleaning agents which contain benzine or al­cohol! Prevent liquids from penetrating into the test in­strument’s interior.

GMC-I Messtechnik GmbH 9

5.3 Recalibration

The measuring tasks performed with your instrument, and the
stressing it’s subjected to, influence aging of its components and
may result in deviation from the specified levels of accuracy.

In the case of strict measuring accuracy requirements, as well as
in the event of use at construction sites with frequent stress due
to transport and considerable temperature fluctuation, we recom­mend a relatively short calibration interval of once per year. If your
instrument is used primarily in the laboratory and indoors without
considerable climatic or mechanical stressing, a calibration inter­val of once every 2 to 3 years is sufficient as a rule.

During recalibration at an accredited calibration laboratory
(DIN EN ISO/IEC 17025), deviations from traceable standards
demonstrated by your measuring instrument are documented.
Ascertained deviations are used to correct display values during
later use of the instrument.

We would be happy to perform DAkkS or factory calibration for
you at our calibration laboratory. Further information is available at
our website:

www.gossenmetrawatt.com ( Company  DAkkS Calibration
Center or  FAQs  General – Calibration Questions and
Answers).

Recalibration of your instrument at regular intervals is essential for
the fulfillment of requirements according to quality management
systems per DIN EN ISO 9001.

* Examination of the specification, as well as adjustment, are not included in calibra-

tion. However, in the case of our own products, any required adjustment is per­formed and adherence to the specification is confirmed.

6 Repair and Replacement Parts Service,

Calibration Center and Rental
Instrument Service

If required please contact:

GMC-I Service GmbH
Service Center
Thomas-Mann-Str. 20
90471 Nürnberg, Germany
Phone: [phone]
Fax: [phone]
E-mail [e-mail]
www.gmci-service.com

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

7 Product Support

If required please contact:

GMC-I Messtechnik GmbH

Product Support Hotline

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

Edited in Germany • Subject to ch ange without notice • PDF version available on the Internet

GMC-I Messtechnik GmbH
Südwestpark 15
90449 Nürnberg,

Germany

Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
www.gossenmetrawatt.com