V 1.3 

13 

2018/08/03 

ES289

20000 Counts Manual DMM

 

1.12. ADP

ES289 provides 4 manual range ADP measurement modes for user define. The ADP pin(pin7) is

auxiliary input terminal for ADC of ES289. The full scale for ADP mode is 200.00mV. If FC5 is

pulled to V-, the minus sign will not be shown on LCD segment.

Mode

FC1~4

SLACDC / FC6

Full Scale

Input Terminal

ADP0

1,0,0,1

1,1

20000

ADP V.S. SGND

ADP1

0,0,1,1

1,1

2000.0

ADP V.S. SGND

ADP2

0,0,1,0

1,1

200.00

ADP V.S. SGND

ADP3

0,1,0,1

1,1

20.000

ADP V.S. SGND

ADP4

0,1,1,1

1,0

2.0000

ADP V.S. SGND

Note: If FC5 is set to V-, the minus sign will be disabled.

1.13. Auto Power Off (APO)

ES289 has a default auto power off function. If the meter is idle for more than the given idle time

duration, the chip automatically turns the power off. When APOSEL (pin44) is set to V-, the idle time

to trigger the auto power off function is set to 30 minutes. When APOSEL is floating, the idle time is

15 minutes. When APO is occurred, the state of the meter is reserved. The APO symbol on the LCD

panel indicates whether the auto power off is enabled or not. In some cases, user might want to

disable Auto power off. There are two ways to disable this feature as following:

1. Power on the meter when any of the push functions, except for HOLD, is pressed down.

Note: Powering on the meter while pressing HOLD and lasts 2 seconds turns on all LCD segments until HOLD

is pressed again.

1.14. Sleep

The meter enters sleep mode after auto power off. The SLEEP pin (pin48) asserts low (V-) in the

sleep mode, and asserts high (V+, not 0V) after re-power on.

1.15. Re-Power On

After auto power-off, pushing any of the push function or changing the rotary mode can turn on

the meter again. If the meter is re-powered on by changing the rotary mode, the stored state is cleared.

If the meter is re-powered on by push functions, the chip restores the stored state and enters HOLD

mode. The LCD displays the stored value.