Features
•Signal output: RS-485 (Modbus / RTU protocol).
•It is convenient to connect to PLC, DCS, industrial control computer, general controller, paperless recording instrument or touch screen and other third-party equipment.
•Dual high impedance differential amplifier, strong anti-interference, fast response.
•Patented pH probe, the internal reference liquid seeps out from the microporous salt bridge very slowly under a pressure of at least 100KPa (1Bar), and its positive seepage lasts for more than 20 months. Such a reference system is very stable, and the electrode life is doubled compared to ordinary industrial electrodes.
•Immersion installation, easy to install in the pipeline and tank.
•Protection grade IP68.
Specification
|
Model |
RY-CXW310/485 |
|
Range |
0～14pH |
|
Resolution |
0.01pH |
|
Accuracy |
±0.1pH |
|
Working temperature |
0～65℃ |
|
Work pressure |
＜0.2MPa |
|
Temperature compensation |
Automatic temperature compensation (NTC) |
|
Power Supply |
12～24VDC ±10% |
|
Output |
RS-485(Modbus/RTU) |
|
Wetted material |
POM |
|
Installation method |
Immersion installation |
|
Cable |
5m |
|
Calibration method |
Two-point calibration |
|
Power consumption |
＜0.05W |
|
Protection level |
IP68 |
Electrical connection
The cable is a 4-core twisted pair shielded cable, and the wire sequence definition:
|
Red wire |
Power cord (12V-24VDC) |
|
Black wire |
Ground wire (GND) |
|
Blue line |
485A |
|
White line |
485B |
Use and maintenance
When measuring the pH sensor, it should be cleaned in distilled water (or deionized water) first, and the water should be absorbed with filter paper to prevent impurities from being brought into the measured liquid. 1/3 of the sensor should be inserted into the measured solution.
The sensor should be cleaned when not in use, and inserted into a protective cover with 3.5 mol/L potassium chloride solution, or inserted into a container with 3.5 mol/L potassium chloride solution.
Check whether the terminal is dry, if it is stained, wipe it with absolute alcohol and blow it dry before use. Avoid long-term immersion in distilled water or protein solution, and prevent contact with silicone grease. For sensors that have been used for a long time, its glass membrane may become translucent or attached with sediment. In this case, it can be washed with dilute hydrochloric acid and rinsed with water. The sensor has been used for a long time, and when there is a measurement error, it must be calibrated and corrected with the instrument.
When the sensor cannot be calibrated and measured when the sensor is maintained and maintained by the above methods, it means that the sensor has failed. Please replace the sensor.
Standard buffer pH value control reference table
|
Temp(℃) |
4.00 |
4.01 |
6.86 |
7.00 |
9.18 |
10.01 |
|
0 |
4.00 |
4.00 |
6.98 |
7.12 |
9.46 |
10.32 |
|
5 |
4.00 |
4.00 |
6.95 |
7.09 |
9.39 |
10.25 |
|
10 |
4.00 |
4.00 |
6.92 |
7.06 |
9.33 |
10.18 |
|
15 |
4.00 |
4.00 |
6.90 |
7.04 |
9.28 |
10.12 |
|
20 |
4.00 |
4.00 |
6.88 |
7.02 |
9.23 |
10.06 |
|
25 |
4.00 |
4.01 |
6.86 |
7.00 |
9.18 |
10.01 |
|
30 |
4.01 |
4.02 |
6.85 |
6.99 |
9.14 |
9.97 |
|
35 |
4.02 |
4.02 |
6.84 |
6.98 |
9.17 |
9.93 |
|
40 |
4.03 |
4.04 |
6.84 |
6.97 |
9.07 |
9.89 |
|
45 |
4.04 |
4.05 |
6.83 |
6.97 |
9.04 |
9.86 |
|
50 |
4.06 |
4.06 |
6.83 |
6.97 |
9.02 |
9.83 |
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