GIFSQ Tools · Module 15 — Metrology, Validation & Laboratory Accreditation · Tool 299 of 500
Verify a thermometer against a reference temperature, apply the correction, and keep a dated log of every check — saved on this device only.
Try sample values — fills the form with the worked example below.
Verification log — saved on this device only
Add each check to the log. Entries are saved on this device only (gifsq_tool_299) — nothing leaves the device.
| Date | Reference | Indicated | Correction | Error | Result |
|---|
–
Correction to apply
–
Error
–
Result
Equation: Error = indicated − reference. Correction = reference − indicated (add the correction to the reading). Pass when |error| ≤ tolerance.
Method: Thermometer verification per ISO/IEC 17025 clause 6.4 (equipment) and ISO 17025 calibration practice: compare the thermometer with a traceable reference at a known temperature (ice point 0 °C and boiling point 100 °C are common checks) and record the correction.
Assumptions: the reference temperature is traceable and stable; the thermometer and reference are at the same temperature when read; the tolerance is the laboratory limit for this thermometer and use.
Limitations: a two-point check does not prove accuracy across the whole range — verify at the temperatures you actually use; a thermometer that drifts between checks needs a shorter interval.
Rounding: correction and error to 2 decimal places; intermediates unrounded.
This is a calculation aid, not a laboratory report — confirm against your accredited method before citing a value.
Method: Thermometer verification per ISO/IEC 17025 clause 6.4 (equipment) and ISO 17025 calibration practice: compare the thermometer with a traceable reference at a known temperature (ice point 0 °C and boiling point 100 °C are common checks) and record the correction.
Assumptions: the reference temperature is traceable and stable; the thermometer and reference are at the same temperature when read; the tolerance is the laboratory limit for this thermometer and use.
Limitations: a two-point check does not prove accuracy across the whole range — verify at the temperatures you actually use; a thermometer that drifts between checks needs a shorter interval.
Rounding: correction and error to 2 decimal places; intermediates unrounded.
This is a calculation aid, not a laboratory report — confirm against your accredited method before citing a value.
Worked example: Reference 100.0 °C, indicated 99.6 °C, tolerance 0.5 °C: correction = 0.40 °C (add 0.40 to readings), error = −0.40 °C — pass, inside tolerance.
Enter values above to see results.
Add each check to the log below. A fail means take the thermometer out of service until it is adjusted or recalibrated. Tool 299 of 500 — GIFSQ
