DeFelsko PosiTest HHD Mode D'emploi page 15

IMPORTANT:
PosiTest HHD Troubleshooting
Check Electrode Connections: With the detector powered OFF,
PosiTest HHD will not detect holidays
check all connections. Ensure the electrode rod is fully engaged
within the barrel of the PosiTest HHD and the lock gate is
engaged.
Check Ground Connections: With the detector powered OFF,
remove the ground cable and fully reinsert it twisting clockwise
180° until locked. Ensure the opposite end is clean and well
connected to the substrate of the coating system being
inspected.
Check Test Voltage: If the test voltage is too low, the PosiTest
HHD will not find holidays.
Reduce Travel Speed: Recommended travel speed of the
PosiTest HHD is a maximum of 0.3m/second (1ft/second). Since
the PosiTest HHD operates at a pulse repetition rate of 30
pulses per second, it is possible to miss holidays if the travel
speed exceeds the recommended maximum.
Check Battery: A low or defective battery will not be able to
PosiTest HHD turns OFF while in use
sustain the power required to operate the PosiTest HHD. Charge
or replace the battery.
When generating high voltage, the PosiTest HHD display is
The PosiTest HHD integrated jeep/crest meter ALWAYS displays
lower than the test voltage.
the actual voltage being generated. Although the PosiTest HHD
will regulate the output voltage to match the test voltage, there
are circumstances when it is not possible to generate the test
voltage. For example, overloading of the electrode by setting the
voltage higher than recommended for the coating system under
inspection may result in a generated voltage lower than the test
voltage. Reducing the brush or electrode size will also reduce
loading.
Keep all electrical contacts clean.
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