24
GMC-I Gossen-Metrawatt GmbH
10
Resistance Measurement
➭
Be certain that the device under test is voltage-free.
Extraneous voltages distort the measurement results!
➭
Set the rotary switch to “
Ω
”.
➭
Connect the DUT as shown.
Zero Balancing in the 300
Ω
and 3 k
Ω
Measuring Ranges
Cable and transition resistance can be eliminated with zero
balancing for measurements of small resistance values in
the in 300
Ω
and 3 k
Ω
ranges :
➭
Connect the measurement cables to the instrument, and
connect the free cable ends to one another.
➭
Briefly press the multifunction key
ESC|FUNC
.
The instrument acknowledges zero balancing with an
acoustic signal and “
000
.
000
Ω
” and the “ZERO” symbol
appear at the LCD. The resistance which was measured
at the moment the key was activated serves as a refer-
ence value (max. 20000 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.
See chapter 11 for continuity testing.
015
.
000
600V
V
F
°
C
R
x
Voltage Drop
FUNC
brief
000
.
000