Chapter 1 IntroductionChapter 1 Introduction
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1.2 Parameter
Screen size
2.8 inch monochrome LCD(liquid crystal display) with a
resolution of 128*64
Overall dimension:
100mm×100mm×150mm
Cutout dimension
92.5mm×92.5mm
Weight
0.58Kg
Ingress protection
IP65
Measure variables
pH/ORP
Measure range
pH
：
0.00 ~ 14.00pH
ORP
：
-1000 ~+1000mV
-2000~+2000mV
（
optical
）
Accuracy
pH
：
±0.02pH
ORP
：
±1mV
Input resistance
≥10
12
Ω
Temperature
compensation
NTC10K
：
-10~60
℃
Accuracy ±0.3
℃
60-130
℃
Accuracy ±2
℃
PT1000
：
Accuracy ±0.3
℃
-10-130
℃
manual/automatic
Output
4~20mA output, maximum loop is 750Ω,±0.2%FS
RS485 output
Isolated, MODBUS-RTU RS485
Alarm relay
2channels, Pickup/Breakaway
AC250V/3A
Relative humidity
10~85%RH(No condensation)
Operating temperature 0 ~ 60
℃
Power supply
AC
：
220V±10%
，
50Hz/60Hz
Storage conditions
Temperature
：
-15~65
℃
Relative humidity
：
5~95%RH(No condensation)
Altitude:<2000m
