Manual Gossen Metrawatt METRAHIT 30M (page 9 of 28) (English)

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GMC-I Messtechnik GmbH 9

6.1 Zero Balancing (for V , mA , Ω and °C)

Ð Select the desired measuring range with the MAN|AUTO key.

Ð 2-Wire Resistance Measurement, Current Measurement

or Temperature Measurement with Pt100 or Pt1000:

short-circuit the positive and negative poles of sockets

„mAΩ

“ or „°C

“, respectively.

Voltage Measurement, Temperature Measurement with

Thermocouple or 4-Wire Resistance Measurement:

short-circuit the positive and negative poles of sockets

„V/°C

“ or „ΩSense“, respectively.

Ð Briefly press the MAN|AUTO and AVE/MIN|MAX keys

simultaneously.

The instrument acknowledges zero balancing with an

acoustic signal and

“000.0000” (±1 digit, decimal place

depends upon measuring range) and the “ZERO” symbol

appear at the LCD

. The previously displayed measurement

value serves as a reference value (max. ±30000 digits).

Ð Zero balancing can be deleted:

– by pressing the MAN|AUTO key

after which deletion is acknowledged with an acoustic

signal,

– by selecting a different measuring function

– or by switching the instrument off.

Note

The zero balancing values (offset) for temperature measure-

ment are stored to memory in the resistance and/or voltage

measurement ranges and serve as reference values.

6.2 Voltage Measurements for Greater than 600 V

Voltages of greater then 600 V can be measured with a high-

voltage probe, for example the HV3 or the HV30. The earthing

terminal must be connected to ground for measurements of

this type. Observe all required safety precautions!

Function Measuring Range / Function

Pt100: 1 kΩΩ

Pt1000: 10 kΩΩ

Pt100: 1 k ΩΩ

Pt1000: 10 kΩΩ

100 mV V

–V

Voltage Measurements for

Greater than 600 V

with the HV3 High-Voltage

Probe

black

red

x1000

x100

max. 3000 V

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Gossen Metrawatt METRAHIT 30M Manual

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