SAC-SINGLAS Accredited · ISO/IEC 17025
Timer / Stopwatch Calibration
Unitest calibrates digital and mechanical timers and stopwatches in Singapore against a traceable time/frequency reference, with ISO/IEC 17025 certificates.
What is Timer / Stopwatch Calibration?
A timer or stopwatch is a critical instrument used in laboratories, manufacturing, sports timing, and process monitoring to precisely measure elapsed time. Calibration is the systematic process of verifying and adjusting its time-measurement accuracy against known reference standards. Over time, timing drift can occur due to ageing mechanisms, environmental influences, battery fluctuations or mechanical wear-and-tear, which can lead to inconsistent or inaccurate readings. Calibration ensures your timer or stopwatch remains reliable, offering trustworthy time-measurement for your critical applications.
When Should You Calibrate Your Timer / Stopwatch?
The calibration frequency depends on factors such as how intensively it is used, the precision required, and any changes in its operating conditions. As a general guideline:
New Equipment: Newly-acquired timers or stopwatches should undergo an initial calibration to establish a baseline of accuracy.
Regular Calibration: Periodic calibration is recommended—typically annually or more frequently if the device is used in high-precision contexts or subjected to harsh environments.
After Repairs or Modifications: If the device has been serviced, repaired, or modified, a recalibration is essential to ensure its continued performance accuracy.
Change in Operating Environment: Calibration may be necessary if the device is relocated, exposed to different temperature/humidity conditions or used under significantly different workload or stress.
Conclusion
In conclusion, timer and stopwatch calibration is a foundational practice to maintain accurate time-measurements, ensuring reliability and compliance with quality standards. By performing regular calibrations, you can trust your elapsed-time readings, avoid timing errors, and make confident decisions based on dependable data.
What we calibrate
Timer & Stopwatch instruments we calibrate
- Digital stopwatches
- Mechanical stopwatches
- Lab & process timers
- Countdown timers
Accredited under SAC-SINGLAS LA-2023-0845-C. View our accreditation & scope →
Accredited ranges
Timer & Stopwatch calibration ranges & measurement uncertainty
The parameters, ranges and calibration & measurement capability (CMC) below are taken from our SAC-SINGLAS Schedule of Accreditation (LA-2023-0845-C, to ISO/IEC 17025). CMC is the smallest measurement uncertainty we can achieve under accredited conditions.
Calibration of Stop Watch Timer· UNI-E006 Rev:0
| Range / measured quantity | Measurement uncertainty (CMC) |
|---|---|
| 1 s – 60 s | 0.25 s |
| 61 s – 600 s | 0.13 s |
| 601 s – 1200 s | 0.13 s |
| 1201 s – 1800 s | 0.13 s |
| 1801 s – 3600 s | 0.13 s |
| 3601 s – 7200 s | 0.13 s |
| 7201 – 10800 s | 0.13 s |
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