Two-terminal resistance measurement (DET3TA)
1.
Ensure the rotary selector switch is in the
OFF
position.
2.
Select the desired test voltage using the procedure in the section on General Operating Instructions.
3.
Connect the instrument as shown in Figure 15.
Figure 15: instrument connection for measuring two-terminal resistance
4.
Set the rotary selector switch to the
2P
position.
5.
The ground noise voltage will be indicated on the scale plate as shown in Figure 16.
Figure 16: ground noise voltage indication
6.
If the ground noise voltage is less than 40 V pk-pk (14 V rms), press and hold the
TEST
button. [Testing will be
inhibited if the ground noise voltage exceeds 40 V pk-pk.]
7.
The Rc LED will flash to indicate that the instrument is carrying out pre-measurement checks.
8.
If the Rc LED does not illuminate following the pre-measurement checks, this indicates that the instrument fuse has
ruptured.
9.
If the Rc LED illuminates solidly following the pre-measurement checks, this indicates that a two-terminal
measurement can be made.
10. The two-terminal resistance reading will be indicated on the scaleplate as shown in Figure 17.
Figure 17: example two-terminal resistance reading
Note:
The test voltage used to make the two-terminal resistance reading is a.c. and may not be suitable for continuity
testing according to some local regulations.
No resistance reading is possible if the ground noise voltage exceeds 100 V.
