SAC-SINGLAS Accredited · ISO/IEC 17025
Earth / Ground Resistance Tester Calibration in Singapore
Unitest calibrates earth and ground resistance testers in Singapore — including Kyoritsu, Fluke and Ground Pro — across 100 mΩ to 10 kΩ, under SAC-SINGLAS accreditation LA-2023-0845-C (ISO/IEC 17025). Standard turnaround is 5–7 working days; express service is 2–3 days, with free collection and delivery in Singapore for orders above $300.
Also known as: Ground Resistance Tester · Earth Tester · Clamp-On Earth Ground Tester
Why calibrate?
Unitest provides accredited calibration for earth and ground resistance testers in Singapore over a low-resistance range of 100 mΩ to 10 kΩ, with ISO/IEC 17025 traceable certificates. Earthing accuracy is safety-critical — calibration confirms the instrument reads the true loop or electrode resistance.
What you receive
What earth / ground resistance tester calibration at Unitest covers
Traceable certificate
Calibration certificate with an unbroken traceability chain to national and international standards, recording the as-found condition before any adjustment.
Stated uncertainty
Results reported with measurement uncertainty, so you know exactly how much confidence each reading carries in your quality system.
5–7 day turnaround
Standard turnaround 5–7 working days; express 2–3 working days on request. Free collection and delivery within Singapore for orders above S$300.
Part of our electrical calibration service, accredited under SAC-SINGLAS LA-2023-0845-C.
How often
How often should a earth / ground resistance tester be calibrated?
Earth and ground resistance testers should be calibrated every 12 months. Instruments used for regulatory compliance (SS 638, CP 16) should carry a current certificate.
Accredited ranges
Earth / Ground Resistance Tester 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.
Low Resistance (Earth resistance) – measuring instruments· UNI-E004 Rev:0
| Range / measured quantity | Measurement uncertainty (CMC) |
|---|---|
| 100 mΩ – 0.199 Ω | 0.013 Ω |
| 0.2 Ω – 0.499 Ω | 0.013 Ω |
| 0.5 Ω – 1.999 Ω | 0.051 Ω |
| 2 Ω – 4.99 Ω | 0.019 Ω |
| 5 Ω – 29.9 Ω | 0.026 Ω |
| 30 Ω – 199.9 Ω | 0.12 Ω |
| 200 Ω – 499.99 Ω | 0.49 Ω |
| 500 Ω – 1.999 kΩ | 0.0014 kΩ |
| 2 kΩ – 4.99 kΩ | 0.005 kΩ |
| 5 kΩ – 10 kΩ | 0.014 kΩ |
You can also verify our accreditation on the SAC-SINGLAS directory.
Brands & models
Earth / Ground Resistance Tester brands & models we calibrate
The models customers most commonly send in — not our full capability. Every model is quoted individually; request a quotation and we'll confirm ranges, points and turnaround.
| Brand | Model |
|---|---|
| Fluke | 1630-2 |
| Ground Pro | CTM051 |
| Kyoritsu | 4105 |
| Kyoritsu | 4105A |
| Kyoritsu | 4200 |
| UNI-T | UT521 |
Don't see your model? Send us the make and model — or WhatsApp us a photo of the nameplate — and we'll confirm capability and quote.
Questions
Earth / Ground Resistance Tester calibration FAQ
How often should a earth / ground resistance tester be calibrated?
Earth and ground resistance testers should be calibrated every 12 months. Instruments used for regulatory compliance (SS 638, CP 16) should carry a current certificate.
Is earth / ground resistance tester calibration accredited?
Yes. Earth / Ground Resistance Tester calibration is covered under our SAC-SINGLAS scope of accreditation (LA-2023-0845-C, ISO/IEC 17025), covering 100 mΩ to 10 kΩ. Certificates state the measured values and measurement uncertainty, traceable to national and international standards. Where an instrument falls outside the accredited ranges, we can calibrate it as a traceable service instead.
How long does earth / ground resistance tester calibration take?
Standard turnaround is 5 to 7 working days; express service is 2 to 3 working days. Collection and delivery in Singapore are free for orders above $300.
Which brands of earth / ground resistance tester do you calibrate?
Commonly submitted brands include Fluke, Ground Pro, Kyoritsu and UNI-T. This list covers the models customers most often send in, not our full capability — send us your make and model and we'll confirm whether it falls within our accredited scope or can be calibrated as a traceable service.
Related
Related instruments
Digital Multimeter (DMM)
Digital Multimeter calibration →Analog Multimeter
Analog Multimeter calibration →Clamp Meter
Clamp Meter calibration →Browse every instrument type on the Find Your Instrument page.
Need earth / ground resistance tester calibration?
Submit your instrument list — we'll confirm capability, turnaround and pricing, no obligation.