Amprobe MEGATEST-5000 Megohmmeter - Manual (Page 10)

3 Preparing the instrument for use
3.1 Initial checks
Before being shipped, the instrument is checked from an electrical and a mechanical point
of view.
Every precaution has been taken so the instrument can be delivered without damage.
However the user is advised to look the instrument over quickly in order to check for any
damage during shipment. In case of any fault, contact the forwarding agent at once.
We also suggest making sure that the package contains every part listed under heading
6.4. In case of any discrepancy, contact the dealer.
Should it be necessary to return the instrument, please follow the instructions under the
heading 7.
3.2 Power supply for the instrument
The instrument is fed by 4 each, 1.5 volt, “D” size alkaline batteries (not included)
Endurance with new batteries is as follows:
250 measurements V = 5000 V Rx = 5 MΩ (minimum)
t = 1 min.
450 measurements V = 500 V Rx = 500 kΩ (minimum) t = 1 min.
Before measuring, make sure that the "low battery” indicator is not lit (chap. 4.2, symbol
4).
When the "low battery” indicator is lit, measurements can still be performed, but with very
low resistance, it might not be possible to reach the rated voltage, and the measurement
would not be valid.
3.3 Storage
If the instrument has been kept in a cold environment and the measurement must be
performed in a warm place, the sharp change in temperature would make humidity
condense and this would falsify the measurement.
In this case, 15 min. must be allowed for the instrument to stabilise its temperature and
allow the condensation to evaporate.
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