Operation; Vt4 Layout; On/Off And Voltage Sensitivity; Low Battery Indication - Martindale Electric VT4 Instruction Manual

3. OPERATION

3.1 VT4 Layout

5 6
1
4
2
3
1
Test tip for voltage test
2

Torch

3
LED illumination area
4
Hand grip area
5
On/Off and voltage sensitivity range button
6
Torch button
7
Battery compartment end cap
3.2 ON/OFF and Voltage Sensitivity Range
Button
Pressing the ON/OFF button (5) for 1 second
will turn on the VT4. The red LED in the LED
illumination area (3) will fl ash at a rate of once a
second to indicate the unit is activated.
The VT4 will default to the 50 to 1000V voltage
sensitivity range.
To change the voltage sensitivity range to 12V to
1000V, press the voltage sensitivity range button
(5) for less than 1 second. The red LED in the LED
illumination area (3) will now double fl ash at a rate
of once a second.
To power off the unit press the ON/OFF button (5)
for at least 2 seconds. The fl ashing red LED will
cease.
7
5
The unit will auto power off after 5 minutes.

3.3 Low Battery Indication

If the red LED illuminates continuously without
the buzzer sounding, the batteries require
replacing as reliable indication can no longer
be guaranteed. Refer to Section 4.1 (Battery
Replacement).
3.4 Torch
To turn on the torch (2), press and hold the torch
button (6).

3.5 Proving Check

Before each use the voltage tester should be
examined for cracks or any other damage. If
there is any doubt the voltage tester should not
be used.
Before and after use, verify the voltage tester
is functioning correctly using a known good AC
voltage source. The AC voltage source must be
within the specifi ed range of the voltage tester.
When the test tip (1) is held in close proximity to
the voltage source, the red LED must illuminate
and the buzzer must sound as in table 1, for the
selected voltage sensitivity range setting.
Table 1
Voltage
sensitivity Red LED
range
12V to 1000V Flashing
50V to 1000V Continuous
Do not use the voltage tester if it does not
function correctly during proving.
6
Buzzer
Pulsed