Viomax CAS51D Calibration Overview
Viomax CAS51D is an industrial analyzer used for online spectral measurement, widely applied in water quality monitoring and process control. Regular calibration is a key step to ensure its measurement accuracy. Calibration mainly includes two parts: zero-point calibration and slope calibration.
The calibration cycle is usually determined according to working conditions, and it is generally recommended to perform it every 1-3 months. If the measurement medium changes greatly or the data is abnormal, the calibration interval should be shortened.
Preparation Before Calibration
Tools and Standard Solutions
- Standard solutions: Use deionized water or a blank sample for zero-point calibration; use a standard solution of known concentration for slope calibration.
- Cleaning tools: Soft cloth and special cleaning agent to avoid scratching the optical window.
- Record sheet: Used to record values before and after calibration for traceability.
Environment and Safety
- Ensure the instrument is in stable operation with small temperature fluctuations.
- Wear protective gloves and goggles to avoid skin contact with standard solutions.
- Confirm there are no bubbles or leaks in the pipeline before calibration.
Calibration Steps
Zero-Point Calibration
- Remove the sensor from the process pipeline and rinse it clean with deionized water.
- Immerse the sensor in the zero-point standard solution, ensuring the optical window is fully submerged.
- Enter the instrument menu, select zero-point calibration, and wait for the reading to stabilize.
- After confirmation, save and record the zero-point value.
Slope Calibration
- Remove the sensor, rinse it with deionized water, and wipe it dry.
- Immerse it in a slope standard solution of known concentration.
- Select slope calibration in the menu and enter the standard solution concentration value.
- After the reading stabilizes, confirm and save, and record the slope value.
Calibration Parameters and Judgment
| Item | Recommended Value | Description |
|---|---|---|
| Zero-point drift | ≤ ±0.5% | Recalibrate if exceeded |
| Slope range | 90%-110% | Check the optical window if exceeded |
| Calibration cycle | 1-3 months | Adjust according to working conditions |
Common Problems and Solutions
Causes of Calibration Failure
- Contaminated standard solution: Replace with new standard solution.
- Dirty optical window: Clean with soft cloth and cleaning agent.
- Bubble interference: Gently tap the sensor to remove bubbles.
Daily Maintenance Recommendations
- Regularly clean the optical window and keep it clean.
- Record each calibration data and establish a trend file.
- Contact the manufacturer's technical support in case of abnormalities.
By standardizing the execution of Viomax CAS51D calibration, measurement accuracy can be effectively improved and the service life of the instrument can be extended.