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5
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[4] Measuring Methods
4-1 Preparations
WARNING
Fig 1
For safe use of the instrument, check its appcarance and associated
accessories carefully before use.
1. Check for damage due to dropping, etc.
2. There is a risk of electric shock if the insulation coating of a test
lead or its conductor wire is exposed. Check the test leads
carefully before use.
NOTE: Operation of the POWER Switch and Auto Power OFF
The POWER switch of the instrument toggles, or alternates operation,
so that each successive press switches the selected measuring function
from ON to OFF, and vice versa. The auto power OFF feature provided
turns power OFF automatically in about 1 minute, as a safeguard for
when you forget to set the POWER switch to OFF after use. Still, we
recommend pressing the POWER swith to OFF after measurement to
save the power of the built-in batteries.
4-2 Checking the Built-in Batteries
1. Do not connect any leads to the measuring terminals.
2. Set the function switch to 500 V or 15 V.
3. Press the POWER switch.
4. The built-in batteries are normal if the INSUL. TEST VOLT ON
indicator (red LED) lights up and the LCD looks as shown in Fig. 1.
Summary of Contents for M53
Page 21: ...M53 DIGITAL INSULATION METER WITH VOLTAGE SPEED RANGE INSTRUCTION MANUAL ...
Page 38: ...MEMO ...
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