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1) REL/INRUSH button is relative value measurement
button. Operated by tapping this button, it will enter
relative value measurement mode,. The current
display value can be stored in the memory as
reference value. When the user measures later, the
display value is the difference for input value minus
reference value. ie. REL△(current reading)= Input
value - Reference value.
2) The relative value measurement can only be
performed in the manual mode.
3) In the AC current measurement state, press
REL/INRUSH more than 2 sec to enter surge
measuring state
1) In the process of measurement, if ambient light is too
dark to read, press “B.L/HOLD” key to open the
backlight, the backlight will automatically turn off after
about 30 seconds.
2) During this period, pressing “B.L/ HOLD” key more
than two seconds will turn off backlight.
3) In the current mode, the meter will turn on backlight
and, at the same time, it will turn on clamp head light.
Backlight is LED with high current draw. The backlight
will turn off in about 30 seconds. If backlight is used
often, it will shorten battery life, so do not use
backlight excessively.
4.6 REL/INRUSH Measurement
4.7 Back Light And Clamp Head Light
Note:
When battery voltage < 7.2V, the LCD displays “ ”
(undervoltage) symbol. When the user uses the
backlight, the battery voltage drops below 7.2 V, due to
high working current. The “ ”symbol may appear, and
measurement accuracy is not guaranteed. Contimue
to use the meter normally without using backlight.
Do not replace the battery until “ ” symbol shows
under normal cnditions.
4.8 Automatic Power-Off
1) If there is no operation during any 15 minutes after
turning the machine on, the meter will enter
suspended state, automatically powering off to save
the battery. Within 1 minute before shutdown, buzzer
will sound five times. The meter will then enter a
dormant state.
2) After automatic power-off, press FUNC key, the
meter will turn on again.
3) If the user holds “FUNC” key when powering on, it
will cancel automatic power-off function.
4.9 Measurement Preparation
1) Turn the transfer switch to turn on the power. When
battery voltage is low (about<7.2V), LCD displays
“ ” symbol, Replace the battery.
2) “ ” symbol means that input voltage or current
should not be more than the specified value, which
is to protect the internal line from damage.
3) Place transfer switch to required measuring function
and range.
4) When connecting line, first connect the common
test line, then connect charged test line. When
removing line, remove charged test line first.
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