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During insulation measurement the tester generates a high voltage internally.The positive side of
this is connected to Brown (VΩ) lead causing a very small current to flow through the external
insulation resistance, Green (COM) lead, meter resistance and finally back to the negative side
of the HV generator.
The current and voltage are measured as shown and the external resistance calculated and
displayed.
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Insert the brown test lead into the brown input terminal
& the blue test lead into the green terminal.
The brown test lead can be substituted by using the red
remote test probe supplied.This allows remote
activation of the 8400 from the safety of the test probe
ensuring that you are always looking at the point of
contact and not the Ethos 8400.
Select insulation on the rotary switch either 250V,
500V, 1000V setting as required.
Connect the brown test lead to the phase conductor and
the blue test lead to the other conductor under test and
press the test button.
The tester will beep indicating voltage output through
the test leads and the circuit under test. The display will
indicate output voltage then display the result of test in
MΩ. 0V output will indicate if finished and no voltage
present.
When test is activated the red Voltage/Polarity will flash
warning there is voltage on the leads and circuit under
Tes t .
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To enable the hands free feature simply press Test Lock
button once,The ‘T-LOCK’ annunciator will appear
flashing on the display and will continue to do so until
cancelled by a further press of the Test Lock button or by changing the function selector switch.
When the ‘T-LOCK’ annunciator is flashing a single press of the test button will toggle
continuous testing on and off.
Once started a steady beeping tone will be emitted to indicate that measurement is being taken.
After a second or two the test result will be displayed in the primary display area and an audible
tone will indicate either by a single beep that the result is a value above 2MΩ or by a short 2
tone alarm that the result is a value under 2MΩ. The secondary display area will show the
terminal voltage being applied.
The tester will continue to take the measurement and any further change to the resistance of the
circuit will be indicated by an audible tone as described above and a change of result on the
display.
Whilst testing in hand free mode the red warning LED will flash to warn of the voltage between
the prod tips/crocodile clips.
A further single press of the test button will suspend measurement.
13
EETTHHOOSS 88440000
INSTRUCTION MANUAL
12
EETTHHOOSS 88440000
INSTRUCTION MANUAL
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