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2.8 Battery Low Message
When the batteries discharge to a predetermined low
threshold value, the HPAT500 will display a 'Connect
charger' message.
2.9 Auto Power Down
If the HPAT500 remains inactive for a period of 10
minutes or the HPAT500 batteries approach a level
where the HPAT500 can no longer function correctly, the
HPAT500 will automatically power down. The message
'Auto Power Down' will be displayed on the screen for 3
seconds before Auto Power Down.
Display results will be lost when Auto Power Down occurs.
When the HPAT500 is next powered up, it reverts to
Select Test screen.
2.10 Null of Test Probe Lead Resistance (Class I
Earth Continuity only)
The null function is used to compensate for the test
probe lead resistance when used for Class I earth
continuity measurements. This also allows for the use of
alternative test probes.
To null the test probe lead resistences:
•
Power off the pat tester
•
Attach the test lead
Connect the test lead probe to the EARTH pin on the
•
front panel 13amp test socket
Hold down the CLASS I and CLASS II buttons while
•
powering up the device
The NU symbol on the right of the display will light up
•
Within 5 seconds - Press the LEAD button to initiate
•
the calibration
The unit will run through the calibration check and if the
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