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Introduction

Principle & Structure

The electrical conductivity represents the electrical conductivity of the material, the greater the electrical conductivity, the greater the electrical conductivity, and vice versa.

The conductivity sensor is suitable for use in almost all occasions, and its robust construction makes it durable for many test sites with harsh conditions.

Features

● The modular design of the board makes the assembly and configuration more convenient.

● Adopt 2.4-inch 128×64 dot matrix screen

● Adopt isolated transmission output, less interference

● It can measure conductance value/TDS, temperature measurement, upper and lower limit control, transmission output, RS485 communication

● High and low alarm functions and hysteresis can be set

● Buzzer, LCD backlight switch function can be set

application

Widely used in thermal power, chemical fertilizer, metallurgy, environmental protection, pharmaceutical, biochemical, food and tap water and other solutions in the continuous monitoring of conductivity value and temperature.

technical parameter

Measuring range
Residual chlorine:0...20mg/LResolution 0.01mg/L
HOCL:0...10mg/LResolution 0.01mg/L;
PH:0...14pHResolution 0.01pH;
temperature:0...99.9℃Resolution 0.1℃;
precision
Residual chlorine:±2% or ±0.035mg/L whichever is greater
HOCL:±2% or ±0.035mg/L whichever is greater;
pH:±0.05pH 
temperature:±0.5°C (0...60.0°C);
Sample temperature:0 ... 60.0 , 0.6MPa ;
Sample flow rate:200 to 250 mL/1min automatically adjustable
Minimum detection limit:0.01mg / L
Electronic unit repeatability error
Residual chlorine:±0.02mg/L, 
pH:±0.02pH;
stability
Residual chlorine:±0.02(mg/L)/24h, 
pH:±0.02pH/24h;
pH Input Impedance:≥1012 Ω ;
Clock Accuracy:±1min/month;
Galvanically isolated outputs:  0...10mA (load <1.5 kΩ), 4...20 mA (load <750 Ω);
Output current error:≤±1%FS ;
Number of data stores:1 month (1 point/5 minutes);
power:≤10W
weight:Secondary meter: 0.8kg, flow cell with residual chlorine, pH electrode weight 2.5kg;
Installation method:Adopt flow-through installation, inlet and outlet diameter Φ10
output signal:4-20mA (load <750Ω)
Alarm relay:220V,7A
power supply:AC 220V ± 22V, 50Hz ± 1 Hz, 24VDC (optional)
Communication Interface:RS485 (optional)
Protection class:IP65
Dimensions:146x146x108mm
Hole Size:138x138mm
Working conditions:Ambient temperature: 0...60℃; relative humidity <85%
Application range:Electricity, Waterworks, Hospitals

Selection table

ARC31-Online residual chlorine meter

Power supply

DC24V

AC85...265v

output signal

Standard configuration: residual chlorine 4...20mA output * 1 output + relay output * 3

Additional configuration: residual chlorine 4...20mA*1 output+pH 4...20mA*1+relay output*3

(special option) VARIO

No additional function accessories

RS485 communication (up to 5 relay switches are provided when this option is selected)

High and low alarm relay: AC220V, 7A; adjustable hysteresis 0...5.00mg/L
The above selection table does not contain selection codes. For selection, please contact the sales staff or email to sales@kewill-auto.cn to obtain a complete sample.
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