Fluke 1623
Users Manual
14
Troubleshooting
Follow the steps in Table 3 and refer to Figure 9 for steps 1-5.
Table 3. Troubleshooting
Step Description
1 External voltage (Uext) too high
If the external voltage applied to the instrument is too high, usually
from leakage currents in the system under test, no measurement can
be started (see “Technical data” for Uext limit).
Hint: Reposition probe (S/P2) and restart measurement.
2 Auxiliary earth electrode resistance (RH) too high
If the auxiliary earth electrode resistance is too high it is not possible
to drive the current necessary for reliable measurements. The
measurement is blocked (see “Technical data” for Rh limit).
Hint: Check connection of test lead with terminal H/C2, check
auxiliary earth stake.
3 Probe resistance (Rs) too high
If the probe resistance is too high measurements are not reliable.
The measurement is blocked (see “Technical data” for Rs limit).
Hint: Check connection of test lead with terminal S/P2, check
probe stake.
4 Weak batteries
If the batteries are weak the supply voltage may break down during
measurement. If there is enough energy to complete the
measurement “
” symbol is displayed - measuring results are
valid. If not, a reset occurs.
Hint: Replace batteries. Use 6 alkaline AA-type (LR6) batteries.
5 Is your R
A
measurement result reliable?
Probe S/P2 must be outside the potential gradient areas of E/C1 and
H/C2 for accurate measurements. Normally a probe distance of
more than 20m is sufficient. However in some environmental
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