Operation Manual
GMC-I Messtechnik GmbH 9
GB
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
2
“ or „°C
2
“, respectively.
Voltage Measurement, Temperature Measurement with
Thermocouple or 4-Wire Resistance Measurement:
short-circuit the positive and negative poles of sockets
„V/°C
TC
“ 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
°
C
2
Pt100: 1 kΩΩ
2
Pt1000: 10 kΩΩ
2
°
C
4
Pt100: 1 k ΩΩ
4
Pt1000: 10 kΩΩ
4
°
C
TC
100 mV V
–V
Voltage Measurements for
Greater than 600 V
with the HV3 High-Voltage
Probe
black
black
red
x1000
x100
max. 3000 V
+