15
4.3 Torch and Backlight
1
）
If need use Torch, Press“ ” button 2 second then open the Torch.
，
Around 15 seconds
can closed automaticly.If you need re-open the Torch, please press the button 2 second
2
）
The Torch flashlight is LED, and its working current is large. Although the meter is equipped
with timing circuit (timing time is about 15 seconds), frequent use of the Torch will shorten the
battery life, so it is necessary to use the Torch as little as possible.
Note
：
Whe
n battery voltage ≤7.5V
，
LCD displa
y“
-
”
（
Under-voltage
）
symbol. But under the condition
of backlight and flashlight
，
when battery voltage ≥7.5V
，
the high working current will decrease the
battery voltage
，
“
-
” symbol may appears
（
when “
-
” appears
，
the measuring result may not be
accurate
），
It is no necessary to replace batteries. Please turn off the Torch and use the meter in
normal condition until “
-
” appears again.
4.4 Automatic Power off
1) If there is no operation for any 15 minutes after power on, the instrument will go to sleep
automatically to save power. 1 minute before the shutdown, the buzzer has 5 prompts, shut
down before a long sound into the dormant state. (Note: automatic shutdown is still 3 ~ 5uA of
the working current, a long time do not use the best to go to OFF or unplug the battery)
2) Automatically shut down, press the key”
” position, the instrument to resume working
status. Or turn the knob switch to OFF, and then rotate to the desired range.
4.5 Buzzer
When the key is pressed or the function switch is on, the buzzer will sound "Beep" (about
0.25 seconds). If the measured voltage or current is greater than the set alarm value, for
example, the AC voltage is greater than 600V, AC and DC current greater than 10A, the buzzer
will continue to pronounce, as over-range warning; automatically shut down about 1 minute
before the buzzer will be issued five consecutive warning, before the shutdown buzzer will send
a long warning; When the automatic shutdown function is canceled, every 15 minutes will be
issued 5 consecutive warning.
4.6 Preparation for measurement
1) Turn on the power. If the battery voltage is low (about ≤ 7.5V), the display
Display "
-
" symbol, then you should replace the battery.
