ES238 Datasheet, PDF (15/37 Pages) Cyrustek corporation – 6000 Counts DMM / Peak

ES238
6000 Counts DMM / Peak
1.13. Electrical field detection mode
ES238 supports a non-contact AC voltage measurement, which is called electric field measurement
also. The ADC input is configured from ADP 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 output from ES238. 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.
Mode
EF
FC1~4
1,1,1,0
SLACDC
1
Full Scale
-
EF test circuit
EFin+
EFin-
100k
100M
ADP
SGND
AGND
Input Terminal
ADP V.S. SGND
-400mV
1.14. Temperature Measurement mode
VRADP
Temperature measurement mode takes input signal from TEMPin pin. The ES238 has ºC to ºF scale
translation circuit and standard K-type thermocouple reference table is built-in. External
cold-junction compensation circuit is still necessary. In temperature measurement mode, there is
automatic mode and manual mode. The TSEL pin (pin95) is used to control the automatic mode
(0.1^OC/1^OC resolution) or manual mode (0.1^OC resolution) selection. It also could enable or disable
display of input terminal symbol on the LCD panel (SEG28).
Manual range
Auto Range
ºC range
ºF range
-200.0 ºC ~ 600.0 ºC
-200.0 ºC ~ 600.0 ºC
/ -200 ºC ~ 1350 ºC
-328.0 ºF ~ 999.9 ºF
-328.0 ºF ~ 999.9 ºF /
-328 ºF ~ 2462 ºF
The following table summarizes the operation of TSEL pin:
Range select
V+
Manual range
DGND
Auto range
TSEL
Floating
Manual range
V-
Auto range
LCD SEG28 Display Symbol ON Display Symbol ON Display Symbol OFF Display Symbol OFF
V 2.2
15
2015/12/15