MINITRAC 31 Product Overview
MINITRAC 31 is a density and concentration measuring instrument based on the radioactive principle, widely used in chemical, petrochemical, oil and gas, mining, and other industrial processes. Its non-contact measurement method is particularly suitable for high-temperature, high-pressure, highly corrosive, or high-viscosity media. This article provides a download of the MINITRAC 31 Chinese manual and summarizes key parameters and usage points.
Download MINITRAC 31 Chinese Manual.pdf
Technical Parameters and Performance Indicators
Core Measurement Parameters
| Parameter | Typical Range/Description |
|---|---|
| Measurement Principle | Gamma-ray absorption |
| Density Measurement Range | 0.3 ~ 3.0 g/cm³ (extendable) |
| Concentration Measurement Range | Depends on medium, typically 0 ~ 100% |
| Process Temperature | -40 ~ +200°C (higher temperatures require optional configuration) |
| Process Pressure | Up to 100 bar (depending on flange rating) |
| Output Signal | 4~20 mA / HART / Profibus PA |
| Protection Class | IP66 / IP67 |
The above parameters are typical values; actual selection must be based on specific working conditions and radioactive source strength. It is recommended to refer to the selection table in the manual to confirm the final configuration.
Installation and Commissioning Points
Installation Steps
- Confirm the pipe or vessel wall thickness, material, and diameter, and select the appropriate radioactive source and detector installation position.
- Fix the detector and source container on both sides of the measuring pipe section, ensuring the radiation beam is aligned with the detector center.
- Connect the power and signal cables, paying attention to shielding and grounding to avoid electromagnetic interference.
- After power-on, use a handheld terminal or commissioning software to perform zero and span calibration.
- Enter the reference value based on the actual medium density or concentration to complete calibration.
Commissioning Precautions
- Before commissioning, it must be confirmed that the radioactive source is in a closed or safely shielded state.
- Avoid using strong electromagnetic equipment near the detector, such as walkie-talkies and frequency converters.
- Regularly check the locking device of the source container to ensure compliance with radiation safety regulations.
- If the measured value fluctuates greatly, appropriately increase the damping time or check for scaling on the inner wall of the pipe.
Typical Applications and Maintenance
Common Application Scenarios
- Online monitoring of acid/alkali concentration in chemical reactors.
- Oil-water interface and density measurement in oil pipelines.
- Black liquor concentration control in the paper industry.
- Slurry density measurement in the mining industry.
Daily Maintenance Recommendations
- Check the detector window quarterly for cleanliness to avoid dust accumulation affecting radiation intensity.
- Perform a radioactive source leakage test annually and keep records on file.
- Regularly compare the output signal with laboratory analysis values; recalibrate if the deviation is too large.
- After replacing the radioactive source or detector, a full-range calibration must be performed again.
Proper use and maintenance can significantly extend the service life of the MINITRAC 31 and ensure measurement accuracy. For complete technical information, please download the MINITRAC 31 Chinese Manual PDF above.