GENERAL OPERATING INSTRUCTIONS
Instrument output voltage selection
The maximum output voltage of the instrument is 50 V. It is possible to reduce this to 25 V for operation
in situations which require it. The most appropriate output voltage should be selected by the operator
based on local safety procedures.
The procedure for changing the output voltage is as follows:
DET3TA:
1. Press and hold the TEST button and switch instrument ON to the V setting using the selector
switch.
2. The needle will sweep across the scaleplate and return to the rest position. [On older DET3TC
and DET3TD instruments, the firmware version will be displayed followed by ‘tst’].
3. Release TEST button. The maximum output test voltage will be displayed, either ‘50 V’ or
‘25 V’.
4. To toggle between the maximum output test voltages, press the TEST button.
5. Switch off instrument when the desired maximum test voltage is displayed.
DET3TC, DET3TD, DET4TD2, DET4TR2, DET4TC2 and DET4TCR2:
1. Press the 25V/50V button after selecting the measurement mode; the display will indicate the
selected output voltage.
Note: For ART mode, the output voltage is automatically set to 25 V and cannot be changed.
Note: Some older versions of the DET3TC and DET3TD do not have the the 25V/50V button. The
procedure for changing the output voltage is as per the DET3TA.
Auto power down
To extend battery life, the instrument will automatically switch off six minutes after the last operation.
The instrument can be switched back on by turning the selector switch to the OFF position and then
selecting the desired mode of operation.
Display symbols (DET3TC, DET3TD, DET4TD2, DET4TR2, DET4TC2 and DET4TCR2)
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