Free pressure gauge calibration log template
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Free pressure gauge calibration log covering zero, span, mid-point, hysteresis and accuracy class per AS 1349, AS 3978 and AS ISO/IEC 17025.
Commercial Director
Updated 25 May 2026
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What is a pressure gauge calibration log template?
A pressure gauge calibration log is a formal record used to document the periodic calibration of a Bourdon tube or electronic pressure gauge against a traceable reference standard, typically a dead-weight tester or a calibrated electronic pressure controller. The log captures the instrument identity, the reference equipment used, the gauge accuracy class, the application category (standard process, safety-critical or calibration master), and the as-found and as-left readings at each calibration point across the working range. Standard practice covers a zero check, a span check at full-scale deflection, mid-point readings at 25 percent, 50 percent and 75 percent of full scale, and a hysteresis test that compares ascending and descending readings to flag spring fatigue or sensor drift. Industrial pressure ranges typically span 0 to 10 bar for low-pressure service, 0 to 100 bar for general process, and 0 to 600 bar for hydraulic and high-pressure duty.
From a regulatory angle, pressure gauge calibration sits inside a defined framework that auditors and process engineers expect to see evidenced. AS 1349 sets the requirements for Bourdon tube pressure and vacuum gauges in service, including accuracy class definitions of 1.0 percent, 1.6 percent and 2.5 percent of full-scale deflection. AS 3978 covers electronic pressure measurement and digital indicator transducers, which now make up most safety-critical service. AS ISO/IEC 17025 sets the international competence standard for the calibration laboratory or in-house procedure that issues the certificate. API 510 and the WHS Regulations 2011 Chapter 5 then carry the duty in process industries to maintain pressure instrumentation against the design specification and the manufacturer schedule. A documented calibration log is the artefact mines inspectors, NOPSEMA inspectors and process plant auditors will look for first when they question the integrity of a pressure reading on a refinery, water utility, gas network or hydraulic shop.
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Benefits of using this pressure gauge calibration log template
- Process safety assurance: documented calibration confirms pressure readings are accurate before they are relied on for over-pressure protection, relief valve validation or alarm trips
- Regulatory compliance: AS 1349 and AS 3978 require pressure gauges to be calibrated against a traceable reference and operated within the rated accuracy class
- Detect sensor drift early: trended as-found readings across zero, mid-point and span reveal gradual drift before the gauge falls outside its accuracy class
- Hysteresis fault detection: comparing ascending and descending readings flags spring fatigue, ratchet wear or sensor drift before it causes a process upset
- Application category discipline: calibration to standard process, safety-critical or calibration master class forces the team to apply the right tolerance to the right gauge
- NMI traceability evidence: recording the dead-weight tester or pressure controller identity and certificate number links every gauge reading back to the National Measurement Institute chain
- Identify damaged instruments: repeated zero offset, span failures or hysteresis errors flag gauges over-pressured, dropped or exposed to corrosive process fluid
- Due diligence record: in the event of a pressure-related incident, a stamped calibration log demonstrates the gauge was verified at the time of the work
Benefits of digitising forms in MapTrack
When you digitise pressure gauge calibration logs in MapTrack, you get:
- Field users can easily scan a QR code to complete a form on mobile. Unlimited users.
- Automatically get alerts when faults are identified.
- Link every form digitally as a PDF to the relevant asset, location or person.
- Receive a digital PDF copy with every submission to your email.
- Ability to share forms digitally.
- Build conditional logic (show or hide questions based on answers).
- Take pictures or attach photos. Not possible with a paper-based form.
- Electronic signatures.
- Edit forms later without reprinting.
- Restrict permissions (who can view, complete or approve).
- Build forms with AI (describe what you need and MapTrack suggests the form).
- Set recurring audit schedules with automatic reminders and escalation.
- Produce regulator-ready PDF compliance packs in one click.
- Track corrective actions from finding to close-out with full audit trail.
Book a demo to see how MapTrack handles pressure gauge calibration logs.
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What to include in a pressure gauge calibration log template
This pressure gauge calibration log template covers 11 key areas:
- Instrument details: make, model, serial number, asset/ID number, accuracy class (1.0, 1.6 or 2.5 percent), full-scale range, application category and process fluid compatibility
- Reference standard details: dead-weight tester or pressure controller make, model, serial number and NMI-traceable certificate number, four times better than the gauge accuracy class
- Environmental conditions: ambient temperature, reference calibrator stabilisation time and barometric pressure recorded against the calibration event for vented gauge correction
- Zero check: as-found reading at atmospheric pressure recorded before any adjustment, with confirmation that the indicator returns to zero after the pressure is released
- Span check at full-scale deflection: as-found and as-left readings at 100 percent of full scale, with deviation against the accuracy class and pass/fail status
- Mid-point readings: as-found and as-left readings at 25, 50 and 75 percent of full scale, with deviation against the accuracy class on each test point
- Hysteresis test: ascending and descending readings at each test point, with calculated hysteresis error against the gauge specification
- Adjustment notes: details of any zero, span or linearity adjustment made during the calibration, with the as-left readings clearly distinguished from the as-found readings
- Application category sign-off: confirmation that gauge accuracy class is fit for the application, with a note where the gauge has been moved between categories
- Technician identity and sign-off: instrumentation technician name, trade certificate number, calibration date, calibration interval and signature confirming the gauge is fit for return to service
- Calibration history register: 8-row table capturing date, calibrated by, next due, overall result and certificate number for each event over instrument life
How to use this pressure gauge calibration log template
- 1. Record the instrument details: fill in make, model, serial number, accuracy class, full-scale range and application category at the top of page 1, cross-reference against the instrumentation register to confirm the gauge identity and process fluid compatibility before any test pressure is applied
- 2. Record the reference standard: capture make, model, serial number and NMI-traceable certificate number of the dead-weight tester or electronic pressure controller, confirm the reference accuracy is at least four times better than the gauge accuracy class and that the reference certificate is current
- 3. Stabilise the gauge: allow the gauge to sit at the calibration room ambient temperature for at least 30 minutes before testing, log the ambient temperature and barometric pressure, vent the gauge to atmosphere and confirm the indicator returns to zero
- 4. Run the zero check: with the gauge vented to atmosphere, record the as-found indicator reading, adjust the zero screw if required to bring the indicator within the accuracy class and record the as-left reading on the sheet
- 5. Run the ascending span sweep: apply pressure to 25 percent, 50 percent, 75 percent and 100 percent of full scale in turn, record the as-found indicator reading at each test point and calculate deviation against the accuracy class for pass or fail
- 6. Run the descending sweep for hysteresis: bring the pressure back down through 75 percent, 50 percent, 25 percent and zero, record the as-found indicator reading at each descending test point and compare against the ascending readings to calculate hysteresis error
- 7. Adjust if required and re-test: if any test point falls outside the accuracy class, adjust the gauge zero and span screws to the manufacturer procedure, then repeat the ascending and descending sweep and record the as-left readings on the sheet before sign-off
- 8. Confirm application category fit: cross-check the gauge accuracy class against the rated application category, document any change in application category since the previous calibration and update the gauge tag with the as-left accuracy class
- 9. Close the record: stamp the calibration sheet with the technician name and trade certificate number, set the next calibration due date based on the application category interval, attach a calibration sticker to the gauge body and load the certificate against the asset in MapTrack
In MapTrack, you can automate compliance tracking and audit trails. Each submission is stored as a timestamped PDF against the asset record.
Get the free templateEnter your email above to download the full pressure gauge calibration log template as a PDF.Back to download formHow often should you complete this calibration log?
Pressure gauge calibration intervals are driven by the application category, the process fluid duty and the accuracy class required. For standard process duty on a general utility air or water line, the typical interval is 12 months from the previous calibration sticker. For safety-critical service on relief valve set-point validation, fire water pump testing or vessel over-pressure protection, the interval tightens to 6 months because the consequence of an inaccurate reading is direct exposure to over-pressure failure. For calibration master gauges used as the in-house reference for working gauges, the interval tightens further to 3 months and the gauge is restricted to a controlled environment with limited temperature swing. Outside the scheduled cadence, a pressure gauge must also be calibrated immediately after a suspected over-pressure event, exposure to process upset, mechanical impact, extended storage or any change in process fluid that affects the Bourdon tube. Refineries and water utilities also calibrate gauges before a shutdown campaign so the reading chain is verified before the campaign starts.
Frequently asked questions
Applicable regulatory standards
This template aligns with the following regulations and standards:
- AS 1349 (Bourdon tube pressure gauges)
- AS 3978 (Electronic pressure measurement)
- AS ISO/IEC 17025 (Calibration laboratory competence)
- API 510 (Pressure vessel inspection reference)
- WHS Regulations 2011 Chapter 5
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