18
GMC-I Gossen-Metrawatt GmbH
The instrument acknowledges zero balancing with an
acoustic signal and “
000
.
000
” (
±
1 digit) and the “ZERO”
symbol appear at the LCD. The voltage which was dis-
played at the moment the key was activated serves as a
reference value (max.
±
20000 digits). It is automatically
subtracted from subsequently measured values.
➭
Zero balancing can be deleted:
– by pressing and holding the multifunction key
ESC|FUNC
,
after which deletion is acknowledged with a twice
repeated acoustic signal,
– by switching the instrument off.
8.1
Transient Overvoltages
The multimeters are protected against transient overvolt-
ages of up to 6 kV with a halftime value for front time of
1.2/50
μ
s. Due to the fact that overvoltages of greater
duration can be expected for measurements at transform-
ers or motors etc., we recommend our KS30 measuring
adapter. It provides protection against transient overvolt-
ages of up to 6 kV with a halftime value for front time of 10/
1000
μ
s. Continuous loading capability is equal to
1200 V
TRMS
. Additional influence error due to use of the
KS30 measuring adapter amounts to approximately –2%.
8.2
Voltage Measurements for Greater than 600 V
Voltages of greater than 600 V can be measured with a
high-voltage probe, e.g. the HV3 (3 kV) or the HV30
(30 kV DC) of GMC-I Gossen-Metrawatt GmbH. The earth-
ing terminal must be connected to ground for measure-
ments of this type. Observe all required safety precautions!
000
.
000
Voltage Measurement > 600 V
with HV3 High-Voltage Probe
Black
Blac
k
Red
x1000
x100
V
F
°
C
