DOUBLE AWARD-WINNING · USED BY 200,000+ ELECTRICAL PROFESSIONALS
Prove your test instruments are accurate. Every month, in seconds.
CalCard® is the credit-card-sized calibration checkbox for Ongoing Calibration Verification (OCV). It is accepted by NICEIC, NAPIT, ECA and ELECSA, gives you the records your assessor will ask for, and can let you extend your calibration interval from 1 year to up to 3.
VAT free · Shipped direct from the manufacturer
✔ Accepted by NICEIC, NAPIT, ECA & ELECSA
🏆 Electrical Industry Awards winner
⚡ Tested to 1,500 V
💳 Fits in your instrument case
Your assessor will ask for the records. Have them ready.
Under the IET’s Electrotechnical Assessment Specification (EAS 21-478), every enterprise certifying or reporting on electrical work must keep records showing the consistency and ongoing accuracy of its test instruments. That covers instruments you own and instruments you hire.
No records means a gap in your compliance and a last-minute scramble before your next assessment. CalCard® is the only card solution that meets these criteria in full, so you are covered with a simple monthly check.
Three steps. Under a minute a month.
01 · Set your baseline
Straight after your instrument is calibrated, take readings across the CalCard and record them on the peel-and-seal panel on the back. Once sealed, that baseline can’t be altered.
02 · Check monthly
Touch your probes or croc clips on the recessed, gold-plated pads. You don’t need to remove your leads or fiddle with sockets. It works anywhere, in the van or on site.
03 · Record and relax
Log your results on paper, in Word, or in the OCV Application. When an assessor asks, your records are ready and complete.
One card. Potentially two fewer lab calibrations.
Inspectorates have stated that if you keep records of ongoing accuracy and your instrument’s drift stays within 10%, its calibration period can be extended from 1 year to 3 years.
At under £20, CalCard can pay for itself the first time you skip a lab calibration. Your meter also stays in your hands instead of in the post.
Built for the van, not the lab
Insulation / isolation
0.5 MΩ · 1 MΩ · 2 MΩ · 10 MΩ · 20 MΩ, all tested to 1,500 V. These are the realistic values you meet in the field, including the key BS 7671 thresholds.
Continuity
0.25 Ω · 0.5 Ω · 1 Ω · 2 Ω · 5 Ω, covering the critical range for R1+R2 and R2 testing.
Gold-plated pads
Copper, then nickel, then gold layers give consistent contact, resist probe damage and won’t tarnish or corrode.
Tough and waterproof
Laminated layers on a multi-layer glass-fibre base. It’s credit-card sized, so it lives with your instrument where you need it.
Choose your CalCard
All prices are VAT free. Buy direct from the original manufacturer.
CalCard
£19.99
The award-winning calibration checkbox on its own.
✔ Insulation and continuity checks
✔ Peel-and-seal baseline record
✔ Accepted by all inspectorates
★ BEST VALUE
CalCard + PDF Record Sheets
£19.99 £27.99
CalCard plus printable PDF record sheets for CalCard and RCD tests.
✔ Everything in CalCard
✔ Print-ready monthly record sheets
✔ RCD test record sheet included
CalCard + Word Record Sheets
£19.99 £27.99
CalCard plus editable MS Word record sheets for CalCard and RCD tests.
✔ Everything in CalCard
✔ Fill in digitally, store and share
✔ RCD test record sheet included
Questions electricians ask
Is CalCard accepted by my scheme?
Yes. CalCard is accepted and recommended by the regulatory bodies, including NICEIC, NAPIT, ECA and ELECSA.
Does it replace calibration?
No. It works alongside calibration. If you keep ongoing accuracy records and drift stays within 10%, inspectorates have stated your calibration period can be extended from 1 year to 3 years.
How do I record my results?
You have three options: printable PDF sheets, editable MS Word sheets, or the OCV Application. Full step-by-step guidance is in the CalCard instructions.
Will it work with my tester?
CalCard works with any multifunction or insulation/continuity tester using standard probes or croc clips. You don’t need to remove your leads. See the full specification.
Get audit-ready for under £20.
Join over 200,000 electrical professionals who prove their instruments’ accuracy with CalCard®.
Questions first? Contact us, and we’re happy to help.