Pressure gauge practical

5-Point Pressure Gauge Calibration: Practical 0–25–50–75–100% Check

Run a practical five-point pressure-gauge check at 0, 25, 50, 75 and 100% of span while preserving the original As-Found readings.

5 min practicalProcedure / WorkflowRev R0Updated 21 Sep 2026

The five points

AccessRA uses five working points across the gauge span: 0%, 25%, 50%, 75% and 100%. For a 0–1000 psi gauge, that is 0, 250, 500, 750 and 1000 psi.

For another range, calculate the points from that span rather than copying the training pressures.

AccessRA Academy · Workshop tool

Hydraulic deadweight tester

Existing AccessRA Academy workshop-tool record reused here; no duplicate media upload.

Treat the DWT as a pressure balance, not as a pump. The spindle moves oil; the loaded floating piston establishes the reference.

Example: Hydraulic pressure balance / deadweight tester

Try it: complete the upscale run

Apply each reference point in order, allow the bench and pointer to stabilise, then read and record the gauge. Do not adjust during the As-Found sequence.

Calculate the error

Error = indication − reference. To express it against span: %FS error = error ÷ full-scale span × 100.

Compare the result with the tolerance specified for that gauge/job. The 0–1000 psi Class 1.0 AccessRA training case uses ±10 psi.

Do not stop at the upscale run

A complete calibration job may require a controlled 100→75→50→25→0% downscale run, diagnosis, correction only when justified, and a fresh full As-Left verification. Preserve the original As-Found data.

Related field tools

Five-Point Calibration Check

AccessRA field calculator / check

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Calibration Error

AccessRA field calculator / check

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Pressure Unit Converter

AccessRA field calculator / check

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Want the complete workflow?

The free AccessRA Pressure Gauge course adds the complete Gauge Test Lab sequence, structured lessons and practical assessments.

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Technical basis, limitations & references

Applicability

Mechanical Bourdon-tube pressure gauges within the pressure-gauge training arrangements currently validated in AccessRA. Examples use the 0–1000 psi, Class 1.0 training gauge unless the article states otherwise.

Limitations

Use the error pattern as a diagnostic clue, not as a universal manufacturer adjustment instruction. Movement geometry and adjustment provisions vary. Applicable OEM, site and calibration procedures take precedence.

Safety boundary

Use pressure-rated reference equipment, fittings and test media. Do not exceed equipment ratings, and fully depressurise before breaking a pressure connection.

Validation basis

Simulation-backed. Uses the existing AccessRA pressure-gauge training model and focused article demonstration. The micro-demo reuses the same gauge rendering and fault-pattern logic used by the AccessRA Gauge Test Lab; it is illustrative training, not a substitute for an OEM-specific repair instruction.

AccessRA Gauge Test Lab — Technical Baseline
AccessRA · Gauge Test Lab baseline