ES278 Datasheet, PDF (14/25 Pages) Cyrustek corporation – 4000 Counts Manual DMM

ES278
4000 Counts Manual DMM
1.16. Low Battery Voltage Detection
ES278 provides a voltage detection input (pin 89: LBAT9) for non-3V battery application.
When LBAT9 is less than VRH terminal voltage, the LCD segment of low battery will appear. For 3V
battery application, pull LBAT9 to DGND directly and the same detection will be made when V- is
less than 2.3V. When the Low battery status lasts for 10 seconds, the LCD segment of low battery
will be blinking. When the symbol is blinking for 20 seconds, the operation of meter will be inhibited
and LCD panel will show “ Lo.bt”. In this case, it is suggested to replace a new battery immediately.
After “Lo.bt” appears and lasts for 60 seconds, ES278 will enter to auto power off mode.
Low battery test (9V)
9V
BAT
TER
Y
0V
680K
LBAT9
0.1u _AGND
270K
V-
V 1.5
14
2015/12/11