Online Conductivity/Resistivity Controller for Water

Product Details
Customization: Available
Display: LED
Appliance: Water Treatment, Sewage Treatment, Fish Farming...

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  • Online Conductivity/Resistivity Controller for Water
  • Online Conductivity/Resistivity Controller for Water
  • Online Conductivity/Resistivity Controller for Water
  • Online Conductivity/Resistivity Controller for Water
  • Online Conductivity/Resistivity Controller for Water
  • Online Conductivity/Resistivity Controller for Water
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Basic Info.

Model NO.
PCEc01
Certification
RoHS
Type
Dissolved Oxygen Meter
Measuring Range
0 - 20mg/L,0 - 200%,0 - 400hpa
Resolution
0.01mg/L,0.1%,1hpa
Accuracy
±1.5%Fs
Repetition
±0.5%Fs
Temperature Measurement Type
Ntc 10K/PT1000
Output Type
4 - 20mA, RS485
Max.Loop Resistance
750Ω
Communication Protocol
Standard Modbus-RTU (Customizable)
Power Supply
AC220V, 50Hz/60Hz (Optional 24V)
Alarm Relay
AC250V, 3A
Transport Package
Standard Export Packing
Origin
China
Production Capacity
5000 Pieces/Month

Product Description

PCEC01  Online Conductivity/Resistivity Controller
 

Product overview  
PCEC01 EC online analyzer is an intelligent online chemical analyzer. The cap of the sensor is coated with a luminescent material. Blue light from an LED illuminates the luminescent chemical. The luminescent chemical instantly becomes excited and releases red light. The time and intensity of red light are inversely proportional to the concentration of oxygen molecules, So the concentration of oxygen molecules is calculated.

Features

Support dissolved oxygen(DO), saturation(SAT), oxygen partial pressure(OPP) and temperature measure.
Support upper/lower limit control, transmitting output, RS485 communication.
Configurable manual and auto temperature offset function.
Configurable upper/lower limit alarm and delay.
Configurable hummer and LCD backlight switch.
Optional language, Chinese and English.
Zero oxygen and full-scale calibration.

Applications
Sewage treatment plants:
Oxygen measurement and regulation in the activated sludge basin for a highly efficient biological cleaning process
Environmental protection water monitoring:
Oxygen measurement in rivers, lakes or seas as an indicator of the water quality
Water treatment:
Oxygen measurement for status monitoring of drinking water for example (oxygen enrichment, corrosion protection etc.)
Fish farming:
Oxygen measurement and regulation for optimum living and growth conditions
 
Measuring principle

• Sensor design:
- Oxygen-sensitive molecules (markers) are integrated in an optically active layer (fluorescence layer).
- The surface of the fluorescence layer is in contact with the medium.
- The sensor optics are directed at the underside of the fluorescence layer.
• There is an equilibrium between the oxygen partial pressure in the medium and that in the fluorescence layer:
- If the sensor is immersed in the medium, the equilibrium is established very quickly.
• Measuring process:
- The sensor optics send green light pulses to the fluorescence layer.
- The Oxygen-sensitive molecules instantly becomes excited and releases red light.
- The duration and intensity of the response signals is directly dependent on the oxygen contents and the partial pressure.
- If the medium is free from oxygen, the response signals are long and very intense.
- Oxygen molecules quench the Oxygen-sensitive molecules. As a result, the response signals are shorter and less intense.
• Measurement result:
- The sensor returns a signal that is in proportion to the oxygen concentration in the medium.
- The medium temperature and air pressure are already taken into account calculated in the sensor.
- In addition to the standard values of concentration, saturation index and partial pressure,
the sensor also returns a raw measured value in μs. The value corresponds to the decay time of the fluorescence and is approx. 20 μs in air and approx. 60 μs in media free from oxygen.
 
Technical specifications
Measurement variables Dissolved oxygen, saturation, oxygen partial pressure
Measuring range 0 - 20mg/L,0 - 200%,0 - 400hPa
Resolution 0.01mg/L,0.1%,1hPa
Accuracy ±1.5%FS
Repetition ±0.5%FS
Temperature
measurement type
NTC 10K/PT1000
Auto A/manual H
Measuring range
-10 - 60ºC Resolution: 0.1ºC Correction
accuracy: ±0.5ºC
Output type 1 4 - 20mA current transmission output
Max.loop resistance 750Ω
Current Output Accuracy 0.1%FS
Output type 2 RS485 digital signal output
Communication protocol Standard MODBUS-RTU (customizable)
Power supply AC220V±10%, 50Hz/60Hz (optional 24V±10%)
Alarm relay AC250V, 3A
 
Installation method



            Online Conductivity/Resistivity Controller for Water

2 Dissolved oxygen sensor
       
Online Conductivity/Resistivity Controller for Water
 
Identification of terminal

Online Conductivity/Resistivity Controller for Water

                           Wiring diagram


+12VDC: Power supply of dissolved oxygen electrode
AGND: Power negative of dissolved oxygen electrode
RS485-A: Dissolved oxygen electrode communication-A
RS485-B: Dissolved oxygen electrode communication-B
NC: Null
RS485(A+): RS485 communication interface A+
Optical Dissolved Oxygen Online Analyzer - Operation Manual
RS485(B-): RS485 communication interface B-
I(+):4-20mA output port +
I(-): 4-20mA output port -

HO: High alarm of normal open relay
HC: High alarm of normal close relay
COM: Common port
LO: Low alarm of normal open relay
LC: Low alarm of normal close relay
COM: Common port
220V L: AC220V fire wire
NC: Null
220V N: AC220V zero wire

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Online Conductivity/Resistivity Controller for Water
Online Conductivity/Resistivity Controller for Water

Online Conductivity/Resistivity Controller for Water


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Online Conductivity/Resistivity Controller for Water

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