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4.5 SWitching Functions
1) FUNC Key is a function selection key that acts with
trigger. Press the key can choose the needed
measurement mode: To choose DC or AC in DC/AC
status, to choose Diode or Buzzer in Diode/Buzzer
status, to choose Ohm, Cap, Diode or Buzzer in
Ohm/Cap/Diode/ Buzzer status.
2) Press the key then turn on the power, the Auto
Power-off function will be cancelled, the signal
“ ” disappears in LCD, and enter into Sleep
Status (Power-Off). Press the key then power on
will have the Auto Power-Off function.
4.6 Back Light And CLAmp Lighting Bulb
4.6.1 Press the “HOLD/B.L” button for two or more
seconds to switch on the back light if the light in
the environment is too dim for taking reading,
which will last for 15 seconds.
4.6.2 During the back light is working, press the
“HOLD/B.L” button for two or more seconds, it
will be turned off.
4.6.3 At the current range, when the back light is
switched on, the clamp lighting bulb will be turned
on at the same time.
NOTE:
- LED which requires a larger working current, is the
main source of back light. Although the meter is
equipped with a timer set at about 15 seconds (i.e. the
back light will be off automatically after about 15
seconds), frequent use of the back light will shorten
the life of the batteries. Therefore, do not use the back
light unless necessary.
- When the battery voltage is < 3.7V, the symbol “ ”
(battery low)will appear on the LCD. When the back
light is on, even if the batter is > 3.7V, the “ ” may
appear because of its large working current which will
cause the voltage to drop. (The accuracy of the
measurement cannot be assured when the “ ”
symbol appears.) In this case, you need not replace
the batteries yet. Normally, the batteries can last until
the “ ”appears when the back light is not being used.
4.7 Auto Power Off
4.7.1 If the mode switch or keys of the meter is no action
within 15 minutes, the system will power off
automatically (sleep mode). In Auto Power-off
status, press any key, the meter will “Auto Power
-On” (Operation Mode)
4.8 Preparating For Measurement
4.8.1 Switch on the power by turning the rotary selector.
If the battery voltage is lower than 3.7V, the “ ”
symbol will appear and the batteries should be
replaced.
4.8.2 The “ ”symbol shows that the input voltage or
current should not exceed the specified value in
order to protect the internal circuit from damage.
4.8.3 Turn the rotary selector to the required function
and range to be measured.
4.8.4 Connect the common test lead first and then the
charged test leads when making connection.
Take away the charged test lead first when
disconnecting.
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