Calibration · Free Template
Flowmeter Verification Record Template
Record a flowmeter check against a reference (master meter, prover, weigh tank or bucket test) at several flow rates. The sheet calculates the error at each run and the mean error per flow rate.
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- How to Use sheet with steps
- Template sheet, blank and ready
- Example sheet, filled in
- 54 built in formulas
- A4 landscape print setup
- Works in Excel, Google Sheets and LibreOffice
Preview of the Filled Example
This is the Example sheet from the download, so you can see exactly how the completed flowmeter verification record looks.
Tag numberFT 4102
Meter typeMagnetic flow meter DN 80
ReferenceWeigh tank with calibrated scale
Volume unitL
Tolerance (± % of reading)0.5
Test date25 Oct 2026
Verification runs
| Run | Nominal flow (% of max) | Flow rate (m³/h) | Duration (s) | Reference volume | Meter volume | Error (% of reading) | Result | By | Remarks |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 25 % | 12.50 | 120 | 416.20 | 417.30 | 0.26 | PASS | Tech A | |
| 2 | 25 % | 12.50 | 120 | 415.80 | 417.00 | 0.29 | PASS | Tech A | |
| 3 | 50 % | 25.00 | 90 | 624.50 | 625.90 | 0.22 | PASS | Tech A | |
| 4 | 50 % | 25.00 | 90 | 625.10 | 626.20 | 0.18 | PASS | Tech A | |
| 5 | 100 % | 50.00 | 60 | 832.00 | 834.10 | 0.25 | PASS | Tech A | |
| 6 | 100 % | 50.00 | 60 | 833.40 | 835.20 | 0.22 | PASS | Tech A |
Mean error (%):0.24 · Spread of errors (max − min, %):0.11 · Runs failed:0
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About the Flowmeter Verification Record
Flowmeters drift through wear, coating and electronics ageing. Periodic verification against a trusted reference shows whether the meter still meets its accuracy, and provides data for a meter factor correction if needed.
How to fill in this template
- Enter meter, reference and tolerance.
- Run the flow steady at each test rate and collect a reference volume while reading the meter total.
- Enter reference and meter volumes for each run.
- Review error, mean error and spread; a consistent offset suggests a K factor or meter factor correction.
- Sign and file with the meter history.
What the formulas do
- Error (%) = (meter volume − reference volume) ÷ reference volume × 100.
- Mean error = average of all run errors.
- Spread = maximum − minimum error, a simple repeatability check.
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Frequently Asked Questions
How long should each run be?
Long enough that timing and reading resolution are small compared with the tolerance, often at least 1 minute or 1000 pulses.
What is a good reference?
A weigh tank, a prover or a master meter with uncertainty at least 3 to 4 times better than the tolerance.
Can I use a bucket test?
For small water meters, yes, with a calibrated container and stopwatch.
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What factors affect the stability of flow meter readings?
A practical guide on instrumentationblog.in that explains the procedure behind this template and how engineers apply it on real plants.
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