7
5. Preparations for use (all instruments)
5.1 Batteries
The Megger MIT400 series instruments are supplied with batteries fitted. When batteries
become exhausted, refer to
section17 for battery replacement
.
Warning: Do not switch the instrument on or connect test leads with the battery cover
removed.
5.2 Preliminary test lead check
Functional verification
1.
Before each use of the instrument visually inspect the test leads, prods and crocodile
clips to confirm that their condition is good, with no damaged or broken insulation.
2.
Check continuity of the test leads by firmly shorting the leads together and read the
test lead resistance measurement directly from the display, which should be less than
1.0
.
Supply voltage
With the exception of voltage measurement range, this instrument is designed for
use on isolated (dead) circuits. Prior to any testing and using an approved method,
ensure the circuit to be tested has been fully disconnected and is securely isolated
from the supply prior to using the instrument.
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