VEGABAR 86 Pressure Transmitter Overview
VEGABAR 86 is a high-performance pressure transmitter launched by VEGA, widely used in industrial process measurement. It adopts the ceramic capacitive measurement principle and has excellent long-term stability and overload resistance. This article provides the download of the VEGABAR 86 Chinese manual and sorts out key technical information for engineering technicians and procurement to quickly consult.
Download VEGABAR 86 Chinese Manual.pdf
Core Technology and Working Principle
Measurement Principle
VEGABAR 86 is based on ceramic capacitive pressure measurement technology. The process pressure acts on the ceramic diaphragm, causing a capacitance change, which is converted into a standard signal output by the electronic module. This principle has no mechanical transmission parts, so its vibration and shock resistance are outstanding.
Main Advantages
- High overload capacity: can reach more than 10 times the measuring range, avoiding damage caused by misoperation.
- Long-term stability: annual drift less than 0.1% URL, reducing calibration frequency.
- Wide temperature range compensation: built-in temperature sensor automatically corrects temperature drift.
- Various process connections: supports threads, flanges, clamps, etc., adapting to different working conditions.
Key Technical Parameters
The following table lists typical parameters of VEGABAR 86 for selection reference. Specific values are subject to the latest Chinese manual.
| Parameter | Typical Value/Range |
|---|---|
| Measuring range | 0 ~ 0.1 bar to 0 ~ 100 bar |
| Output signal | 4 ~ 20 mA / HART, Profibus PA, Foundation Fieldbus |
| Accuracy | ±0.1% of span |
| Process temperature | -40 ~ +150 °C |
| Ambient temperature | -40 ~ +80 °C |
| Protection class | IP66/IP67, IP68 (optional) |
| Process connection | G½, G1, NPT, flange, etc. |
| Diaphragm material | Ceramic (Al₂O₃) |
Installation and Commissioning Points
Installation Steps
- Confirm that the process connection matches the pipe/vessel interface and clean the sealing surface.
- Tighten with appropriate torque to avoid damaging the ceramic diaphragm due to excessive force.
- The installation position should facilitate wiring and observation, avoiding strong vibration sources.
- For gas measurement, it is recommended to install above the pipeline; for liquid measurement, it is recommended to install on the side or below.
- During wiring, strictly follow the terminal definitions in the Chinese manual to ensure correct power polarity.
Commissioning Points
- Zero calibration: perform under no pressure to ensure 4 mA output.
- Range setting: adjust via HART handheld communicator or local buttons.
- Damping setting: adjust according to process response speed to suppress fluctuations.
- Troubleshooting: if the output is abnormal, first check power supply, wiring, and process pressure.
Selection Guide
When selecting, the following information must be confirmed to match the most suitable VEGABAR 86 model.
- Measuring range: the actual working pressure should be between 30% and 80% of the range.
- Process connection: select according to pipeline specifications and sealing requirements.
- Output signal: compatible with the existing control system.
- Process temperature: for high-temperature conditions, a high-temperature model or an additional isolating diaphragm is required.
- Explosion-proof requirements: for hazardous areas, intrinsically safe or flameproof models must be selected.
Common Problems and Maintenance
Common Problems
- Output too high/too low: check whether zero, span, and process pressure are normal.
- No output: check supply voltage, polarity, and fuse.
- Large fluctuations: increase damping time or check for cavitation/pulsation.
Maintenance Recommendations
- Regularly check the aging of seals and replace them if necessary.
- Avoid touching the ceramic diaphragm with hard objects to prevent damage.
- Perform zero verification every 12 months to ensure accuracy.
- Keep the Chinese manual well for quick reference of parameters and fault codes.
The above content is based on the VEGABAR 86 Chinese manual. For the complete version, please click the link above to download the PDF. Correct selection and standardized installation can significantly improve measurement reliability and reduce maintenance costs.