SAC-SINGLAS Accredited · ISO/IEC 17025
Loop / Process Signal Calibrator Calibration in Singapore
Unitest calibrates loop and process signal calibrators in Singapore — including Fluke, Additel and Emerson — across DC voltage sourcing 0 mV to 1000 V, DC current sourcing 0 µA to 30 A and frequency sourcing 1 Hz to 100 MHz, 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: Loop-Powered Process Calibrator · Loop Calibrator · Process Signal Calibrator · mA Calibrator
Why calibrate?
Unitest calibrates loop-powered and process signal calibrators in Singapore — including 4–20 mA sourcing/measuring, DC voltage sourcing and frequency sourcing — with traceable ISO/IEC 17025 certificates. Process calibrators are the reference instruments used to calibrate transmitters in the field; their own calibration must be current.
What you receive
What loop / process signal calibrator 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 loop / process signal calibrator be calibrated?
Process calibrators should be calibrated every 12 months. Field instruments used in safety-instrumented systems may require a 6-monthly interval.
Accredited ranges
Loop / Process Signal Calibrator 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.
DC Voltage sourcing instruments· UNI-E003 Rev:0
| Range / measured quantity | Measurement uncertainty (CMC) |
|---|---|
| 0 mV – 100 mV | 0.0021 mV |
| >0.11 V – 1 V | 0.0012 % |
| >1 V – 10 V | 0.001 % |
| >10 V – 100 V | 0.002 % |
| >100 V – 1000 V | 0.005 % |
DC Current sourcing instruments· UNI-E003 Rev:0
| Range / measured quantity | Measurement uncertainty (CMC) |
|---|---|
| 0 µA – 10 µA | 0.0018 µA |
| >10 µA – 100 µA | 0.017 % |
| >100 µA – 1 mA | 0.025 % |
| >1 mA – 10 mA | 0.012 % |
| >10 mA – 100 mA | 0.02 % |
| >100 mA – 1 A | 0.13 % |
| >1 A – 10 A | 0.1 % |
| 10 A – 30 A | 0.30 % |
Frequency sourcing instruments· UNI-E003 Rev:0
| Range / measured quantity | Measurement uncertainty (CMC) |
|---|---|
| 1 Hz – 10 Hz | 0.006 % |
| >10 Hz – 1 kHz | 0.03 % |
| >1 kHz – 10 kHz | 0.0003 % |
| >10 kHz – 100 kHz | 0.0002 % |
| >100 kHz – 1 MHz | 0.001 % |
| >1 MHz – 10 MHz | 0.001 % |
| >10 MHz – 100 MHz | 0.0002 % |
You can also verify our accreditation on the SAC-SINGLAS directory.
Brands & models
Loop / Process Signal Calibrator 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 |
|---|---|
| Additel | 227Ex |
| Emerson | AMS TREX |
| Fluke | 715 |
| Fluke | 725 |
| Fluke | 725 Ex |
| Fluke | 726 |
| Fluke | 744 |
| Fluke | 754 |
| Fluke | 787 |
| Fluke | 787B |
| Fluke | 789 |
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
Loop / Process Signal Calibrator calibration FAQ
How often should a loop / process signal calibrator be calibrated?
Process calibrators should be calibrated every 12 months. Field instruments used in safety-instrumented systems may require a 6-monthly interval.
Is loop / process signal calibrator calibration accredited?
Yes. Loop / Process Signal Calibrator calibration is covered under our SAC-SINGLAS scope of accreditation (LA-2023-0845-C, ISO/IEC 17025), covering DC voltage sourcing 0 mV to 1000 V, DC current sourcing 0 µA to 30 A and frequency sourcing 1 Hz to 100 MHz. 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 loop / process signal calibrator 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 loop / process signal calibrator do you calibrate?
Commonly submitted brands include Additel, Emerson and Fluke. 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
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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 loop / process signal calibrator calibration?
Submit your instrument list — we'll confirm capability, turnaround and pricing, no obligation.