40
setting to the range to be adjusted (
1mV/A
or
10mV/A
). Keep the
DC Zero
button pressed for 30
seconds, until the
ON
indicator blinks yellow, then green. Release the
DC Zero
button. The clamp
is in the adjustment mode.
4. The clamp then performs an adjustment of the zero.
5. Clamp a conductor carrying a current of:
400 A
ac
60Hz for the 1mV/A range
40 A
ac
60Hz for the 10mV/A range
6. Then press the
DC Zero
button. The first press substantially lowers the polarization adjustment of
Hall effect sensors. Subsequent presses increase this adjustment by one step. So press the
DC Zero
button until the correct output voltage is reached.
402 mV
rms
for the 1mV/A range
402 mV
rms
for the 10mV/A range
If you overshoot this value, continue to press the
DC Zero
button until the output signal falls below
the desired value, then restart the adjustment.
7. Once this adjustment is done, press the
DC Zero
button again for 30 seconds, until the
ON
indicator
blinks yellow, then green. You can then release the
DC Zero
button. The adjustment is recorded and
the clamp exits from the adjustment mode.
Remarks
When the clamp is in the adjustment mode (in other words, from step 3), any change of the switch
setting causes an exit from the adjustment mode with no modification. The clamp will then use the
previous adjustments.
To adjust both ranges, you must switch the clamp off, then repeat the adjustment procedure from
step 3.
Summary of Contents for PAC 25
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