1. Overview of CML18 Portable Water Quality Analyzer
The portable water quality analyzer CML18 is a precision instrument suitable for on-site water quality testing, widely used in environmental monitoring, water treatment, industrial process control, and other fields. Its Chinese manual is an important basis for users to correctly operate and maintain the equipment. Based on official materials, this article systematically organizes the core functions, technical parameters, and usage points of the CML18.
Download CML18 Chinese Manual.pdf
2. Main Technical Parameters
The CML18 adopts microprocessor control and digital sensor technology to ensure measurement repeatability and accuracy. The following table lists key parameters for selection and acceptance reference.
| Parameter Item | Specification |
|---|---|
| Measurement Items | pH, ORP, conductivity, dissolved oxygen, turbidity, temperature, etc. (depending on configuration) |
| pH Range | 0.00 ~ 14.00 pH |
| pH Resolution | 0.01 pH |
| Conductivity Range | 0 ~ 200 mS/cm (auto-ranging) |
| Dissolved Oxygen Range | 0 ~ 20 mg/L |
| Temperature Compensation | Automatic/Manual, 0 ~ 100 °C |
| Protection Rating | IP67 (dustproof and waterproof) |
| Power Supply | Rechargeable lithium battery, battery life about 40 hours |
| Data Storage | More than 1000 sets, supports USB export |
3. Detailed Operating Steps
3.1 Power On and Calibration
- Long press the power button for 3 seconds to power on, and the screen displays the current mode.
- Enter the calibration menu and select the corresponding measurement item (such as pH).
- Immerse the sensor in the standard buffer solution, wait for the reading to stabilize, then press the confirm button to complete one-point or two-point calibration.
- After calibration, rinse the sensor with pure water and blot dry.
3.2 Sample Measurement
- Fully immerse the sensor in the water sample to be tested, avoiding bubble attachment.
- Gently stir the sensor to accelerate response, and record after the value stabilizes.
- Press the store button to save data, or export via USB connection to a computer.
- After measurement, clean the sensor with pure water and store properly.
4. Maintenance and Care Points
- Regular calibration: It is recommended to calibrate once a week or before each batch of measurement.
- Sensor cleaning: Use a soft cloth or cotton swab dipped in mild detergent to wipe, avoiding scratching the sensitive membrane.
- Battery management: When not in use for a long time, charge once every 3 months to prevent battery damage.
- Storage environment: Temperature -10 ~ 50 °C, humidity ≤85% RH, avoid direct sunlight.
- Replace consumables: Replace pH electrodes, dissolved oxygen membranes, etc. according to the manual cycle.
5. Common Problems and Solutions
| Symptom | Possible Cause | Solution |
|---|---|---|
| Unstable reading | Sensor contamination or bubbles | Clean sensor, remove bubbles |
| Calibration failure | Expired buffer solution or aged electrode | Replace buffer solution or electrode |
| Cannot power on | Battery depleted | Charge and try again |
| Data cannot be exported | USB driver not installed | Install official driver or replace data cable |
6. Download and Technical Support
If you need the complete CML18 Chinese manual, please click the PDF icon above to download. If you encounter technical problems, you can contact the supplier for original factory technical support. Correct use and maintenance can significantly extend the instrument's lifespan and ensure reliable measurement data.