Instrument output voltage selection
The maximum output voltage of the instrument is nominally 50 V. Should
it prove necessary in particular circumstances, it is possible to set the
output voltage 25 V. The procedure for changing the output voltage is as
follows:
1. Press and hold the TEST button and switch instrument ON to the V
setting on the selector switch.
2. The LCD display will indicate ‘tst’ (DET3TC, DET3TD and DET4TD).
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.
Auto power down
To extend battery life the instrument will automatically switch off six
minutes after the last operation.
The instrument can be switched off manually by selecting the ‘OFF’ setting
on the selector switch and then switched on as normal.
Display symbols (DET3TC, DET3TD, DET4TD)
G
Warning Triangle
f
Fuse Blown
Battery Indicator (not DET3TA).
>100V
Indicates that the ground noise voltage exceeds the instrument
measurement capability.
Rp OK
Potential spike (P Spike) is within range for accurate
measurement (<100 k
Ω
).
9
Rp Hi
Potential spike (P Spike) resistance exceeds range for accurate
measurement (>100 k
Ω
).
Rc OK
Current spike (C Spike) is within range for accurate
measurement (<100 k
Ω
).
Rc Hi
Current spike (C Spike) resistance exceeds range for accurate
measurement (>100 k
Ω
).
Noise OK Ground noise voltage is within range for accurate measurement
(<40 Vpk-pk).
Noise Hi Ground noise voltage exceeds range for accurate measurement
(>40 Vpk-pk).
Display symbols (DET3TA)
Current spike (C Spike) is within range for accurate
measurement (<100 k
Ω
).
Instrument is performing measurement checks.
Note:
Rc and Rp limit reduced to 50 k
Ω
for 25 V output.
Rc and Rp limit reduced to 5 k
Ω
on 18
Ω
range to achieve 0.01
Ω
resolution.
GENERAL OPERATING INSTRUCTIONS (ALL INSTRUMENTS)
