- Zero offset (offset)
Error: The needle does not return exactly to zero without pressure applied.
Causes: Shocks, vibration, overpressure or deformation of the Bourdon tube.
Solution:
- Perform internal adjustment of the mechanism (when the pressure gauge design allows it).
- If the instrument is scratched or the damage is permanent, it must be replaced.
- Install shock absorbers, restrictors or glycerin to reduce future vibrations.
- Unstable readings or with marked hysteresis
Error: The instrument marks very different values in ascent and descent.
Causes: Internal wear, dirt, deformation or friction in the mechanism.
Solution:
- Cleaning and internal adjustment if the design allows access.
- For wear damage, it is recommended to replace the instrument.
- Avoid overpressures and vibrations in operation.
- Poor selection of the instrument range
Error: The pressure gauge constantly operates near full scale.
Causes: Incorrect selection at the time of purchase or installation.
Solution:
- Select equipment whose normal operating range is maximum 50–75% of its scale.
- Change the instrument for one with a range appropriate to the process.
- Evaluate if the system requires additional protection (snubbers, relief valves).
- Connections or accessories in poor condition
Error: Leaks, damaged threads, worn adapters or inappropriate connections.
Causes: Incorrect assembly, corrosion, excessive use or non-standard adapters.
Solution:
- Replace worn or damaged accessories.
- Use compatible connections with the appropriate thread.
- Apply correct torque and proper sealing (where applicable).
- Avoid improvisations such as reductions or bushings not designed for pressure.
- Damage due to overpressure
Error: Deformation of the Bourdon tube, loss of linearity or irreversible damage.
Causes: Water hammer, unexpected pressure peaks, valves accidentally closed.
Solution:
- In most cases: replacement of the instrument (irreversible damage).
- Install overpressure protectors, relief valves or restrictors.
- Train the operator to avoid pressure shocks due to sudden openings.
- Manual adjustments or improper manipulation
Error: Adjusting the pointer “by hand” to try to correct the reading.
Causes: Empirical manipulation without technical knowledge.
Solution:
- Perform actual calibration with standard and adjust only with the appropriate method.
- Instruct staff: moving the needle by hand never corrects the actual error.
- In case of severe mechanical imbalance, replace the instrument.
Detecting and correcting these errors guarantees safer processes, reliable measurements and equipment with longer useful life.
At Flexilatina we identify these failures in the laboratory, we propose technical solutions and we certify your instruments with guaranteed traceability.