Megohmmeter Model 6522/6524
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When the probe is connected, the
symbol is displayed on the
instrument’s LCD.
NOTE:
The remote probe can also be used as a passive probe by simply
touching the probe tip to the test point. It is not necessary to press the test
button.
2.2.3 Continuity Measurement
Continuity measurement measures a low resistance (<10 or 100
Ω
depending on
the current) at a high current (200 or 20mA).
NOTE:
A current of 20mA reduces the power consumption of the instrument,
increasing its battery life. However, the standard IEC 61557 requires 200mA
current for continuity testing.
The Model 6522 can take measurements only at 200mA.
If an external voltage >15V is detected in the system under test during the
continuity measurement, the instrument is protected without a fuse. The
continuity measurement is stopped and the instrument reports an error until the
voltage disappears.
2.2.3.1 Lead Compensation
0
> 2s
Before checking continuity, you should compensate for the
resistance of the measurement leads. This ensures that the
resistance measurement excludes the resistance in the leads.
To do this, set the rotary switch to
Ω
. Then short-circuit the
measurement leads and press the
0
button for >2 seconds.
M
mA
