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The following is a list of frequently asked questions about calibration, our services and other general information. If the information you need isn’t supplied here we recommend giving us a call and we’ll be happy to help you out.

Why do I need to calibrate my equipment?

As time goes on, the base accuracy (a known value) of your tester can change. This can be influenced by many factors ranging from a sudden surge of electricity to actually damage to the meter’s internal operation through accidental knocks. When this occurs, the meter’s accuracy ‘drifts’ from its normal state, potentially meaning that your equipment is inaccurate.

Calibration is the process of checking that your instruments are operating at their correct level of accuracy. If there is a slight inbalance, a calibration technician will fix it and restore the meter to its correct working order. Similarly if there are errors caused by faulty internal parts, calibration can help to discover these issues and repairs can be made.

In short, you need to calibrate your equipment as it could be inaccurate, leading to dangerous installations or incorrectly installed equipment.

How often do I need to calibrate my instruments?

Although there are exceptions to the rule, most instruments should generally be calibrated annually or if you suspect that readings may be incorrect or out of specification.

This applies even if the meter isn’t used that often; as it’s been in storage for a long time, various factors ranging from moisture to low temperatures may have affected your meter’s operation. If you’re going to use it again and the certificate has expired, it needs calibrating again.

How much will calibration cost?

The price we charge for calibration depends upon the complexity of the instrument and the difficulty of the procedure.  Our prices start at just £20 (exc VAT).

You can view our full price list for more information on specific testers here >>

What is the three-day price promise?

It’s quite simple really – if we don’t ship your device back to you within three working days of receipt, then your calibration will be completely free.

There are a few terms and conditions related to 3-day-or-free such as you must have also included payment/purchase order when sending in the instrument.

Full details on the three-day-or-free price promise can be found here.

How should I send my instrument?

To start with, simply fill in our online form and we’ll then contact you to arrange a pickup and organise payment, or you can choose to ship your tester to us yourself.

Our collections are arranged through DPD. They will text or email you on the morning of collection and let you know a 1 hour window when they will collect your instrument.

If the time isn’t convenient, just text back the courier to re-arrange to a more convenient time.

We recommend you make sure your tester is as securely packaged as possible – we’ve had testers shipped to us before in inferior packaging and they can be damaged in transit.

What do I need to send with my instrument?

When you send your instrument you must provide any leads, chargers or accessories. We recommend doing this because a lot of faults with instruments can be present in the leads, and by using your leads/accessories to calibrate we can find problems that may go unnoticed.

What happens if my instrument fails calibration?

If your meter fails the calibration process this generally means there is a fault with the unit. If there is a problem we will contact you directly to discuss the options available to you. If we are able to repair your instrument it will be then passed directly onto the repair department who will quote for the repairs.

The inspection process can take up to a week, and a £45 inspection charge is applicable which will be waived should you go ahead with the repairs. If we are unable to repair your unit we can generally source a replacement and offer a discount off a new instrument.

We will never do anything to let you incur extra costs without your go-ahead.

Please note that when a tester fails calibration it is no longer eligible for the 3-day-or-free price promise.

My instrument is damaged – how do i get it repaired?

If your tester is experiencing problems or isn’t working altogether, is able to help. To take advantage of our repair service, visit the repairs page and fill in our online form. One of the team will then be in touch with you to discuss the process further, and you’ll be able to ship your device to us for repair.

When will I get my tester back?

Calibrations within the 3 day promise will be sent back to you within 3 working days of receipt.

Calibrations not in the 3 day promise: we aim to turn around within 7 working days or less

Repairs can take between 1 week or less for minor repairs and 6 weeks for major repairs (depending upon the issues)

Will the calibration affect the memory, or stored results, on my tester?

Short answer – no! Nothing we do in our calibration procedure will affect your tester’s memory in any way. All your results will still be stored on your instrument, however we recommend that you should download your results before sending it in for calibration.

If your instrument requires repair and we need to replace components/boards then we cannot guarantee that test results will be retained.


Calibration UKAS Accreditation Collection & Delivery Site Map
UKAS Calibration LogoWe are a UKAS accredited calibration laboratory for those activities as listed on the UKAS Schedule of accreditation We can collect and deliver your equipment from anywhere in the UK, or even come to your premises. Alternatively, our trade counter is within easy access of Teesside, Durham, Leeds and Newcastle.
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