Calibration Information

Multifunction Testers (MFT)

Multifunction Testers also known as MFT’s are used by electrical workers to measure the performance of electrical installations and provide the user with an extensive range of tests from, RCD, loop, continuity, earth resistance, phase sequence testing and more, the information a multifunction provides the user with is key to ensuring the safety and correct functionality of the tested unit, and therefore it is important that the multifunction tester is working correctly within manufacturer specifications.

The test procedure for these devices incorporates the test sequence of all three single-function testers.  This ensures that your insulation/continuity, loop and RCD ranges are working as expected and in accordance with manufacturer specifications.

We offer two levels of calibration – Standard & UKAS

We calibrate a whole range of leading multifunction tester brands from Amprobe, Chauvin Arnoux, Di-Log, Fluke, Kewtech, Martindale, Megger, Metrel, Seaward and more. See our list of manufacturers for more information.

Clamp Meters

Clamp meters are tested in a similar fashion to multimeters, where the values of the tester are put through steps between the minimum and maximum to ensure it performs correctly according to the manufacturer’s specification.

Our calibration standard has an optional extra which allows us to output current to a clamp adaptor, which allows us to calibrate all varieties of clamp meters across a wide range of currents.

We can calibrate clamp meters from various different manufacturers including Fluke, Iso-tech, Megger, UNI-T, TPI and more.

PAT Tester Calibration

PAT testers are amongst the most commonly used pieces of test equipment and are relied on by many businesses and users such as handymen/caretakers. Calibration is important because, after time and heavy use, PAT testers can deviate away from manufacturer standards and result in inaccurate readings, which could be the difference between a pass and a fail.

We test the output current of all possible earth bond ranges (if permittable). We also check the earth bond resistance of your PAT tester, the insulation resistance of the device, earth leakage and – where permittable – flash.

We are also able to test loads and all leads supplied with a PAT tester. We also perform an IEC lead and polarity test.

With a traceable calibration, you can prove your equipment was in working order and of standard when you tested the equipment should a fault occur.  Not getting regular calibrations could result in potentially dangerous consequences.

Please note that we also offer a UKAS standard calibration service which provides the highest level of accuracy as well as the confidence of traceable standards. All calibrations are carried out in an environmentally controlled laboratory to ensure the highest accuracy is achieved, by our team of skilled technicians.

We calibrate a whole range of leading PAT Tester brands from First Stop Safety, Fluke, Kewtech, Martindale, Megger, Metrel, Rigel Medical, Robin-Amprobe, Seaward, Testsafe, UNIT-T and more.

Digital and Analogue Multimeters

The Multimeter is a very important tool for any electrician, from initial electrical installation to checking the condition of electrical equipment. The instrument provides the user with several tests and therefore is vital that the tester is accurate.

We test every available range on your digital multimeter by using our highly accurate calibration standards. All calibration services are performed in accordance with manufacturer standards.

When we perform our multimeter calibration we begin by testing the various functions that your device is capable of testing. In order to do this, we begin with the lowest possible value your tester is capable of reading before gradually stepping up the values to the manufacturer’s recommended maximum.

We also perform basic function checks such as:

• Does every section of your display light up?
• Does your continuity buzzer work?
• Do dials rotate freely?

We also perform a range of mechanical and general operational checks of your multimeter to look for faults that may affect its operation. If there are any faults found we will let you know directly and will be able to provide repair services for an additional charge.

We calibrate a whole range of leading multimeter brands from Amprobe, Chauvin Arnoux, Dilog, Extech, FLIR, Fluke, Kewtech, Martindale, Megger, Metrel, Siglent, TPI, Testo, UNI-T and more.

Single Function Testers

We are able to calibrate all single-function electrical testers from most major manufacturers. The three main types of single function testers are:-

• Insulation/Continuity Tester
• RCD tester
• Loop Tester

To test an insulation and continuity tester, we make sure that the output voltage for every insulation range conforms to manufacturer specification. We also test the full range of the device, starting with the minimum value and working up in steps towards the maximum. When testing continuity, we test every range and also make sure that the unit is zeroing correctly by testing the zero function (if it has one).

To test an RCD tester, we perform a general operational test, make sure the device is carrying a current according to the manufacturer’s standards and check each current output range, checking the trip time and trip current.

To test a loop tester, we apply a range of values between the minimum capability of your device and the maximum possible value according to manufacturers standards. If working correctly, your tester should be able to comfortably test all readings. We also perform general operational checks, as well as ensuring that voltage and resistance of the device are correct.

Calibration Checkboxes

When testing a calibration checkbox we like to make sure that we accurately and thoroughly test every possible output from the checkbox. If permittable, we also check that the checkbox is correctly measuring the output voltage from a multifunction tester.

We test every possible range that the PAT calibration checkbox outputs.

Ground/Earth Testers

These devices are extremely similar to a milliohm meter, however, they are capable of testing higher resistances as well. We test these units in much the same way as a milliohm meter however we incorporate some higher resistance tests within the calibration procedure.