Operation Manual

10 GMC-I Messtechnik GmbH
Note
The resistance values given in the resistance sym-
bols of the ISO-Kalibrator 1 are referred to a four-
terminal resistance measurement immediately at the
B1/B2 safety sockets and/or the B3/B4 safety
sockets with gold-plated 4 mm laboratory plugs.
When using probes of poor contact, additional
extension leads or measuring instruments suited for
two-terminal measurements only, additional tran-
sient resistances and measuring errors occur the
magnitude of which you can find in the operating
instructions of your ohmmeter.
Note
Try by all means to establish an optimum contact
between the ISO-Kalibrator 1 and your measuring
instrument!
Figure 1 Example of a four-terminal resistance measurement
B3
B4
=
Voltage drop U
Current
R
U
I
---
=
source I
R