SATA 03075 User Manual page 46

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function (APO TIME: OFF). After that, the "APO" character will disappear off the LCD screen.
* Beeper: In the BEEP ON state, if any valid key switch is pressed, the beeper will sound once
("beep"). The beeper will sound once ("beep") when any valid key is pressed under normal
working conditions, and sound twice urgently ("beep") when any invalid key is pressed. The
beeper can be activated or deactivated from the Setup menu.
When the probe is mistakenly inserted into the jack, the beeper will continue to sound
intermittently to give an alarm.
* Low voltage detection: When the voltage of the built-in working power supply is lower than 7.3V,
the low battery symbol " " will be shown on the display to indicate that the battery needs to
be replaced or the built-in lithium battery needs to be charged in time to ensure measurement
accuracy. Upon detection of a low battery, the meter will be forced to enter the sleep mode.
* Charging of built-in lithium battery: (See Fig. 14)
Connect the special charging adapter provided as accessory as shown to charge the built-in
lithium battery.
* During charging, a red indicator may flash on the top of the meter. When the charging
voltage reaches the maximum value, a green indicator may flash. At that time, the meter will
automatically cut off the charging circuit to indicate the end of charging.
Note:
When the built-in lithium battery is disconnected or fails, a red/green indicator will flash
Fig. 14
continuously on the top of the meter.
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