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MARTINDALE VT7 Manual page 2

Single pole contact voltage indicator

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Before and after each use, the voltage indicator must be proven using a suitable proving
device or a known good voltage source. Do not use the voltage indicator if any expected
indication LED's fail to illuminate correctly during proving.
The voltage indicator will not detect DC voltage.
damage the voltage indicator and expose the operator to a shock hazard. Always check
used on CAT IV installations up to 300V to earth, on CAT III installations up to 600V to
Do not use
probe tip.
Do not use the voltage indicator during rain or precipitation.
persons. The safety of the voltage indicator cannot be guaranteed under such
circumstances and it must not be used.
Cautions
Avoid severe mechanical shock or vibration and extreme temperature.
To avoid corrosion from a leaking battery, remove the battery when the unit is not in use
for an extended period.
3. OPERATION
3.1 Self Test
The self test checks the functionality and battery, a proving check should always be
performed prior to use.
Press the test button on the voltage indicator.
Two LED's, one in the front cone and one above the test switch, should illuminate and
the buzzer should sound.
Do not use the voltage indicator if either of the LED's fails to illuminate or the buzzer fails
to sound.
If both LED's and the buzzer do not function, replace the battery (see section 4.1 Battery
Replacement) and retest the unit.
3.2 Proving Check
Before and after use, verify the voltage indicator is functioning correctly on a known
good voltage source.
Do not use the voltage indicator if either of the LED's fails to illuminate or the buzzer fails
to sound during proving.
Warning
indicator may be damaged and the operator exposed to a shock hazard. Always check
the voltage magnitude of the voltage source before proceeding with a proving check.
3.3 Testing for the Presence of Voltage
Warning
Single pole phase testing is not suitable to determine if a circuit is not hazardous live. A
double pole voltage test should always be used for that purpose.
If testing at locations with high background noise levels, always determine whether the
buzzer is perceptible before relying solely on the buzzer indication.
optimum and consistent sensitivity. A loose grip during testing may reduce the voltage
indicator's sensitivity.

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