Overview of the CA80 COD/TP Analyzer
CA80 COD/TP is an industrial water quality analyzer used for online monitoring of chemical oxygen demand (COD) and total phosphorus (TP), widely applied in wastewater treatment, surface water monitoring, and industrial process control. The third edition of this manual (February 13, 2020) provides complete guidance on installation, operation, and maintenance.
To facilitate quick access to information for engineering technicians and procurement personnel, this article provides the download of the CA80 COD&TP Chinese Manual.pdf and extracts key operating points.
Manual Download and Intended Audience
Download Method
- Click the PDF icon above to download the complete CA80 COD&TP Chinese Manual.
- It is recommended to open it with a PDF reader for easy keyword searching and printing.
- After downloading, please verify the version number: third edition, release date February 13, 2020.
Intended Audience
- Field instrument engineers: for installation, commissioning, and routine maintenance.
- Procurement personnel: to understand instrument technical parameters and configuration lists.
- System integrators: to obtain wiring diagrams and communication protocols.
Core Functions and Technical Parameters
Measurement Principle
CA80 COD uses the potassium dichromate digestion-colorimetric method, and TP uses the potassium persulfate digestion-molybdenum antimony anti-spectrophotometric method. Both comply with Chinese environmental standards HJ 828-2017 and HJ 670-2013.
Comparison of Key Parameters
| Parameter | COD Measurement | TP Measurement |
|---|---|---|
| Range | 0-5000 mg/L | 0-50 mg/L |
| Accuracy | ±5% FS | ±5% FS |
| Digestion Temperature | 165°C | 120°C |
| Measurement Cycle | Approx. 45 minutes | Approx. 30 minutes |
| Output Signal | 4-20mA / RS485 | 4-20mA / RS485 |
Installation and Operation Steps
Installation Points
- Choose an indoor environment with good ventilation and no corrosive gases, with an ambient temperature of 5-40°C.
- Fix the analyzer on a bracket or wall, ensuring it is level and convenient for reagent replacement.
- Connect the sample inlet tube, waste discharge tube, and reagent tubes, avoiding bending or blockage.
- Connect to power (220VAC±10%, 50Hz) and ensure reliable grounding.
First Startup
- Turn on the power switch and wait for the system self-check to complete.
- Enter the menu to set the measurement cycle and range.
- Perform zero calibration and span calibration using standard solutions.
- Start automatic measurement and observe whether the first measurement result is normal.
Calibration and Maintenance
Regular Calibration
- It is recommended to perform zero calibration every 1 month and span calibration every 3 months.
- Use freshly prepared standard solutions to avoid contamination.
- Calibration data is automatically saved and can be exported to a USB flash drive.
Routine Maintenance
- Check reagent levels weekly and replenish or replace them in time.
- Clean the digestion cell and colorimetric cell monthly to prevent dirt from affecting the optical path.
- Replace the peristaltic pump tube quarterly and check the sealing of the tubing.
- Replace consumable parts such as sealing rings and light source lamps once a year.
Common Faults and Troubleshooting
| Fault Symptom | Possible Cause | Solution |
|---|---|---|
| Measurement value too high | Colorimetric cell contamination | Clean the colorimetric cell |
| Measurement value too low | Reagent failure | Replace the reagent |
| No output signal | Loose wiring | Check the 4-20mA loop |
| Error E01 | Abnormal digestion temperature | Check the heating module |
If the fault cannot be resolved, please refer to the fault code table in the manual or contact the manufacturer's technical support.
Summary
The CA80 COD/TP analyzer is an important device for online water quality monitoring. Correct installation, regular calibration, and maintenance are key to ensuring accurate data. Users are advised to download the complete CA80 COD&TP Chinese Manual and operate strictly according to the procedures.