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GMC-I Gossen-Metrawatt GmbH
14
Capacitance Measurement
➭
Be certain that the device under test is voltage-free.
Extraneous voltages distort the measurement results!
➭
Set the rotary switch to “F”.
➭
Connect the (discharged!) DUT to the “
⊥
” and “F” jacks
with measurement cables.
Note!
☞
For polarized capacitors, the “–” pole must be con-
nected to the
“
⊥
” jack.
Resistors and semiconductor paths connected in
parallel to the capacitor distort measurement
results!
Zero Balancing in the 3 nF and 30 nF Measuring Ranges
The inherent capacitance of the instrument and the capac-
itance of the cables can be eliminated with zero balancing
for the measurement of small capacitive values in the 3 nF
and 30 nF ranges:
➭
Connect the measurement cables to the instrument
without a DUT.
➭
Briefly press the multifunction key
ESC|FUNC
.
The instrument acknowledges zero balancing with an
acoustic signal, and “
0
.
000
” and the “ZERO” symbol
appear at the LCD. The capacitance which was mea-
sured at the moment the key was activated serves as a
reference value (max. 200 digits). It is automatically sub-
tracted 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.
600V
V
F
°
C
+
–