Manual

40 Gossen Metrawatt GmbH
8.7 Resistance Measurement “”
➭ Disconnect supply power from the electrical circuit of the de-
vice to be measured, and discharge all high-voltage capaci-
tors.
➭ Make sure that the device under test is voltage-free. Interfer-
ence voltages distort measurement results!
Refer to section 8.6.4 regarding testing for the absence of
voltage with the help of the direct voltage measurement.
➭ Set the rotary switch to “”.
➭ Repeatedly press the Func softkey until the “” measuring
function is displayed.
➭ If necessary, conduct zero balancing by pressing the Zero key
(see description below).
➭ Connect the device under test as shown.
➭ Measurement is started immediately.
Note
Use short or shielded measurement cables in the case of
high-impedance resistance.
Improving Accuracy by means of Zero Balancing – Zero
Cable resistance and contact resistance can be eliminated in all
measuring ranges by means of zero balancing.
➭ Short circuit the measurement cables to this end.
➭ Press the Zero softkey.
➭ Insofar as the value for Zero is less than a permissible threshold
of 0 to 50% of the measuring range, the Zero softkey is no lon-
ger grayed out in the display and the Zero function can be acti-
vated by pressing the Zero key.
➭ The value ascertained for Zero is saved and appears above the
measurement display. Automatic compensation of cable resis-
tance is activated for all subsequent measurements.
➭ The value for Zero is retained when the instrument is switched
to a different measuring function. The correction or offset value
is deleted by pressing Zero once again, or when the instrument
is switched off. The value is cleared from the display.
Note
The “Setup for present measurement” submenu cannot
be accessed for the resistance measurement because no
further settings are available.
S– A
V
Tem p
m/4
COIL
S+
Func

Temp
Func
Func
Func

F
Temp RTD
TEMP TC
300 /3 k/30 k
Measuring Ranges:
300 k/3 M/30 M
R
x
0V!
!
R
x
Zero