DeFelsko PosiTest LPD Manuel D'instructions page 9

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• Press repeatedly to cycle through the 4 test voltage settings.
Voltage Selector
The LED display indicates the currently selected voltage.
• Press once to enable the audible alarm, press again to disable.
Audio Alarm
A green LED illuminates next to the Audio Alarm button when
the alarm is enabled.
NOTE:
The headphone jack is always active.
LED Display:
The four LEDs at the top of the PosiTest
LPD serve multiple functions:
(9V, 67.5V 80KΩ, 67.5K 90KΩ, 90V)
1. Voltage indication
2. Battery state indication – Press and briefly hold the Power
button to check battery status. New, fully charged batteries will
illuminate all four LEDs. Batteries should be changed/recharged
when only one LED illuminates (pg. 12).
3. Pinhole/holiday indication – When a discontinuity is detected,
all LEDs illuminate.
4. Voltage self-test on power-up – See Power button (pg. 6)
5. GroundSense - Successful low voltage pinhole detection
requires that the detector be grounded (earthed) to the test
substrate. If not properly grounded, or if the connection to
ground is lost, the detector will not alarm when a pinhole is
encountered. GroundSense is designed to assure the PosiTest
LPD operator that the detector is grounded while testing.
• The selected voltage LED stays lit when the wet sponge on the
PosiTest LPD is in contact with the coated surface and the
detector is properly grounded.
• When the wet sponge is removed from the coated part, or if the
connection to ground is lost, the selected voltage LED will blink.
7

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