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4-4 Backlight function: HOLD Button
Press and hold the HOLD button for 2 seconds to turn the display
backlight on. Press and hold the button for 2 seconds again to extinguish
it. The backlight also goes off in 30 seconds after it is turned on.
4-5 Relative value function: REL button
The function is used to cancel resistance of test leads for earth
resistance measurement. When the REL button is pressed, the
current value sets to 0 as reference value with
symbol on the
display. When the button is pressed again,
symbol turns off
and the relative value measurement is canceled. (See 5-4)
4-6 Auto Power Off (APO) function
The Auto Power Off function turns the tester off automatically in
about 10 minutes after the last operation. To turn on the tester,
press POWER button. To disable this function, press and hold the
TEST button when power on the tester.
symbol turns off in the
display.
* The Auto Power Off function is automatically canceled during
earth resistance measurement.
4-7 Low battery indication
When the voltage of the batteries drops below about 7.8 V, the
symbol turns on the display. Replace with new batteries (all of
6 pcs.) since accuracy is not guaranteed. The voltage drops
below about 6.0 V, “
” is indicated on the display and any
measurement can not be performed.
[5] MEASUREMENT PROCEDURE
1. Pay attention to electric shock during earth resistance
measurement, which generate up to around 50 V.
2. Never use the tester if the tester, test lead or alligator clip is
damaged or broken.
Carefully handle auxiliary earth electrode, whose tip is sharp
shape.
WARNING
CAUTION