Amprobe MEGATEST-5000 Megohmmeter - Manual (Page 5)

When measuring insulation:
- Cut power off from the installation before preparing for the tests.
- Seal off the testing area and do not allow other people to approach it throughout
the duration of the tests.
- Seal off the installation being tested, disconnecting those branches of it which
are not involved in the test.
- When measuring a section, make sure the test leads are at least 1 “ (25 mm)
apart in order to avoid discharges or unwanted coupling.
- Isolate areas not involved, so unwanted voltages do not reach them.
- Take note of which parts could be live should there be defective insulation.
- Never exceed the maximum insulation voltage the installation was built for.
- Disconnect from the installation any equipment (transformers, bells, intercom
systems, antenna systems, pumps, timers, lights…) which might be damaged by
the measuring or might make it less reliable.
WARNING
p
Danger due to capacitance. Measuring over a very large installation or on
condensers can lead to a dangerous accumulation of power. Always wait for
the voltage to go back to zero before disconnecting the instrument.
1.2 After use
• Once measuring has been completed, press the OFF key to turn the instrument off.
• If you expect not to use the instrument for a long period of time, take the batteries out.
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