Manual Gossen Metrawatt METRISO PRIME (page 5 of 14) (English)

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GMC-I Messtechnik GmbH 5

2 Applications

The METRISO PRIME insulation tester complies with regulation

IEC 61557/EN 61557/VDE 0413 “Measuring and Monitoring Equipment

for the Testing of Electrical Safety in Systems with Nominal Voltages of up

to AC 1000 V and DC 1500 V” Part 2, insulation resistance testers.

It is suited for the measurement of insulation resistance for devices and

systems in a voltage-free condition with nominal voltages of up to 1000 V.

It is also suited for the measurement of insulation resistance of up to 1 T

with open-circuit voltages of up to 5000 V.

Additionally, the tester is equipped with a 2000 V measuring range for

direct and alternating voltages. This is especially advantageous for the

testing of DUTs for the absence of voltage, and for the discharging of

capacitive DUTs.

3 Initial Start-Up

For initial start-up of the METRISO PRIME with crank generator or of the

METRISO PRIME with accessory crank generator module see Chapter 8

and Chapter 3.4. For initial start-up of the METRISO PRIME with battery

operation mode see Chapter 3.1 to Chapter 3.4.

3.1 Battery Installation

Attention!

Before opening the battery compartment (green side panel) be

absolutely certain that the function selector switch is set to the

“V” position, and that the range selector switch is set to the “OFF/

V” position, and that the device is completely disconnected from

all external power circuits.

Ð Unscrew and remove the battery compartment.

Ð Remove the battery clip.

Ð Pull the battery holder out of the battery compartment.

Ð Insert 6 commercially available 1.5 V type IEC R20 or IEC LR20 bat-

teries or storage batteries (single cell) into the battery holder with cor-

rect poling as indicated by the symbols.

Ð Push the battery holder back into the battery compartment.

Ð Push the battery clip back over the contacts making certain that cor-

rect poling is assured.

Ð Return the battery compartment to the housing in the correct direc-

tion (labeling must be legible) and fasten with screws.

3.2 Testing the Batteries

After the batteries have been installed, or if the  indicator LED fails to

light up during insulation resistance measurement, the batteries should be

tested. For battery testing the range selector switch must briefly be set to

the position. Deflection of the needle gauge within the scale for the

battery test indicates the condition of the batteries or storage batteries at

an average load of 1000 V test voltage. The position of the function selec-

tor switch need not be taken into consideration. The left end of the scale

represents minimum required supply voltage, and the right end represents

maximum available supply voltage.

Note



If the needle only moves into the minimal supply voltage range,

several measurements can still be performed for test voltages of

less than 1000 V, because the battery test is conducted with the

same load as is used for a test voltage of 1000 V.

3.3 Switching the Tester On and Off

As long as the function selector switch is set to , and the range selector

switch is not in the OFF/V position, the tester remains activated. For pur-

poses of transport and maintenance we recommend that the function

selector switch be set to the V position, and the range selector switch to

the OFF/V position, in order to prevent unintentional activation of the tes-

ter.

Note



Be certain that the grip on the function selector switch points

exactly to “V” or “”. No intermediate selector switch positions

have been defined, and inaccurate switch positioning leads to

meaningless measurement results. This is especially important

during discharging of capacitive devices under test, because volt-

ages are not displayed in intermediate selector switch positions.

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