ES239 Datasheet, PDF (18/36 Pages) Cyrustek corporation – 6000 Counts DMM / Inrush

ES239
6000 Counts DMM / Inrush
HV indication criterion
Function / Range
DC voltage (typ.)
AC voltage (typ.)
AC mV
> +3V
OL
AC 6V
> +20V
OL
AC 60V – 1000V
> +100V
Depends on SEL2
DC mV
OL
> 3Vrms (40-1kHz)
DC 6V
OL
> 20Vrms (40-1kHz)
DC 60V-1000V
Depends on SEL2
> 90Vrms (40-1kHz)
Res/Cap/Diode modes
> +10V
> 10Vrms (40-1kHz)
Note: If AC+DC signal is applied, the voltage criterion will be changed.
1.20. Multi-level Low Battery Voltage Detection
ES239 provides a voltage detection input (pin 121: LBAT9) for multi-level low battery application.
There are two internal voltage reference Vt1 & Vt2 for comparing with LBAT9. If LBAT9 is larger
than Vt1, the LCD segment of SLB1 – SLB3 will active always. This status implies Full battery.
When LBAT9 is less than Vt1 but larger than Vt2, the LCD segment of SLB1 will disappear and this
status implies Half battery. When LBAT9 is less than Vt2, the LCD segment of SLB2 will disappear
and this status implies Low battery. When the Low battery status lasts for 10 seconds, the LCD
segment of SLB3 will be blinking. When the SLB3 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, ES239 will enter to auto power
off mode.
Full battery
Half battery
Low battery
Low battery condition > 30s
Operation not allowed
blinking
AUTO
AUTO
AUTO
AUTO
DC
DC
DC
DC
1.8 0 0 _V 1.8 0 0 _V 1.8 0 0 _V L o.b t
Low battery test circuit (a)
3V
BA
TTE
0V
120K
LBAT9
0.1u _AGND
470K
V-
Low battery test circuit (b)
9V
BA
TTE
0V
910K
LBAT9
0.1u _AGND
300K
V-
V 2.2
18
2015/12/15