User's Manual Charged Plate Monitor
Part No. 7100.CPM74
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Page 10 of 10
V0508
7. Warranty
We provide 12 month limited warranty from date of receiving the unit, if the unit was
handled properly. The damage of the NiCd-battery caused by improper handling as well
as mechanical damage on the unit are excluded from warranty. Warranty is not provided,
if the housing was opened.
Warranty void if the unit was opened!
8. Grounding
The unit has to be grounded sufficiently for accurate measurements of the electrical field
and its polarity. Therefore the unit has to be connected to ground potential by means of
its grounding socket.
9. Safety Advice
The measurement unit is not approved for the use in explosive areas!
The unit is not approved for the use in power utilities!
This unit is not suitable to measure alternating fields with a frequency higher
than 1 Hz.
Sparking discharge to the electro-fieldmill-sensor has to be avoided.
Do not charge the batteries longer than 14 hours.
10. Maintenance
The Teflon-supports of the plate electrode must be maintained clean, therefore do not touch
with fingers. All Teflon spacers and the Teflon insulated wire to the plate have to be cleaned
carefully with Acetone or similar solvents in case that the voltage on the charged plate drops
in a rate of greater than 100V / minute under normal circumstances (no external lead
connection to the plate electrode and no presence of air ionizers).
Recommended calibration interval is 2 years.
11. Important Notice
Please note the following advice when checking air ionizers:
The presence of charged objects as well as charged personnel could give erroneous test
results caused by induction. The unit should always be grounded.
