Ver 1.2
13
22/02/24
ES269
6000 Counts Intelligent Auto-Function DMM IC
Electrical field detection test
ES269 supports a non-contact AC voltage measurement, which is called electric field measurement
also.
Press the EF key to enter EF test and press it again to exit EF test.
The ADC input is configured from
EFin
pin vs.
SGND
. When no or less electric field is detected, the
LCD display shows “EF”. If the electric field is detected, the strength will be showed on the LCD
display by “-“ not digits type. Level 1(equivalent to 12.5% full scale of ADC) is “-“ and the level
4(equivalent to 100% full scale of ADC) is “----“. Additional beeper (
BUZOUT
pin) and LED alarm
(
ALARM
pin) will be active from ES269. The frequency of buzzer and LED alarm depends on the
strength of electric field also. The faster beeper means the stronger electric field (AC voltage) is sensed.
In EF unit, OPO_R, OPO_G, and OPO_Y are LED outputs. OPO_G, OPO_Y, and OPO_R outputs
high which represent the detected weak, medium, and strong signal, respectively.
In EF normal, the three pin is not used.
EFin
100M
EF test circuit
EFin+
SGND
AGND
EFin-
100k
VRAD
P
-400mV
