AEMC 275HVD - Testing the 275 HVD Before Operating; High Voltage Testing

12 Non-Contact, High Voltage Detector 275HVD
4.3 Testing the 275HVD Before Operating
( also READ Important warning on page 1)
Switch the sensitivity to “TEST”. The warning buzzer should emit continu-
ous audible tone and the warning light LEDs should light up. This indicates
that the sensor is operational and the battery functional.
Perform the following steps to ensure that the 275HVD detects volt-
age on a known live conductor.
• Selectthe240VAC range and place the sensing head near a known
live (low voltage) conductor (if not available, rub the sensor with
a cloth or against a clothing item to generate a DC static charge
which will trigger the sensor circuit detection).
• ThewarninglightandwarningbeepershouldgoONasifalive
conductor were being tested.
NOTE: Positioning the sensing dome near a computer screen or a TV
screen (not liquid crystal display type) should also trigger the tester while
on the 240V selection.
4.4 High Voltage Testing
See Warning on Page 5 & 6
The 275HVD Non-Contact High Voltage Detector works by proximity. It
is not designed to be in physical contact with live conductors. Its sensor
detectstheradiatedeldwhichsurroundsliveconductors.
Do not touch live conductors with the 275HVD
Non-Contact High Voltage Detector.
Radiatedeldstrengthincreaseswithvoltageanddecreasesquicklywith
distanceand/orgroundshielding.Theradiatedeldfromacablewhere
conductors supplying three-phase power are close together, tends to
cancel out (See § 4.2). The rotary switch (attenuator) is used to identify
and differentiate various HV live cables.
The tester must only be used with an appropriate insu-
lated rod or Hot Stick when measuring High Voltage.
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