Manual Gossen Metrawatt METRALINE ISO-CHECK (page 7 of 8) (English)

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GMC-I Messtechnik GmbH 7

3.5 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 con-

nected to a DUT. If device functions are still incorrect after switch-

ing the instrument back on again, remove the batteries as

described in section 5.1 on page 7, 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.

4 Technical Data

4.1 Measuring Functions

Insulation Resistance

Nominal Range per EN 61557-2: 0.100 M – Rmax*

* The Rmax value depends on the selected test voltage:

Nominal voltage of 50 to 99 V Rmax = 1.999 G

Nominal voltage of 100 to 249 V Rmax = 3.999 G

Nominal voltage of 250 to 1000 V Rmax = 9.999 G

Nom. measuring voltage 50 to 1000 V

Adjustable in steps of 1 V

Measuring voltage -0%/+10% of nominal voltage

Nom. measuring current 1 mA (where Umes > Unom)

Short-circuit current < 3 mA

Automatic discharging

of the DUT Yes

Number of

measurements Approx. 250 (with new alkaline batter-

ies)

Surge Protection

Measuring method Rising DC voltage when measuring the so-

called milliampere point

Direct and Alternating Voltage (frequency range: 45 to 65 Hz)

Key

a) The TRMS value for alternating voltage is measured.

b) rdg. means reading, i.e. measured value.

d = digits (i.e. number 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 temperature0 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

1.2 V NIMH (with at least 750 mAh)

Number of

measurements with batteries at 800 mAh:

approx. 1,000 measurements

(with 500 V test voltage on 500 k

Electrical Safety

Measuring category with safety cap applied to test probe:

CAT III 300 V

without safety cap applied to test probe:

CAT II 300 V

Pollution degree 2

Protection class II

Mechanical Design

Display OLED, multicolored, graphic

Protection IP 43

Dimensions Approx. 260 x 70 x 40 mm

Weight Approx. 0.36 kg with batteries

5 Maintenance

5.1 Device Power Supply

Caution: Dangerous Voltage!

Dangerous voltage in battery compartment!

Disconnect the test probes from the device under test and

switch the instrument off before removing the battery com-

partment 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

on page 4).

If too little voltage is indicated, replace the batteries.

Note

We recommend removing the batteries during lengthy

periods of non-use (e.g. vacation). This prevents exces-

sive 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

with correct polarity (refer to the embossed symbols at the bot-

tom of the battery compartment).

Always replace all four batteries at once, and use high quality bat-

teries. Replace the battery compartment lid and retighten the

screws.

Range Resolution Intrinsic Uncertainty Measuring

Uncertainty

0.100 to 9.999 M 0.001 M (2% rdg. + 10 d) (3 % rdg. + 20 d)

10.00 to 99.99 M 0.01 M (2% rdg. + 10 dd) (3% rdg. + 20 d)

100.0 to 999.9 M 0.1 M (2% rdg. + 10 d) (3% rdg. + 20 d)

1.000 G ... Rmax* 0.001 G (4% rdg. + 15 d) (5% rdg. + 25 d)

Range Resolution Intrinsic Uncertainty Measuring

Uncertainty

40 to 1050 V 1 V (2% rdg. + 2 d) (3% rdg. + 3 d)

Range Resolution Intrinsic Uncertainty Measuring

Uncertainty

0 to 600 V 1 V (2% rdg. + 2 d) (3% rdg. + 3 d)

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