Proving Units

A proving unit is a portable device that’s designed to be used as a two-pole tester, to verify the safe operation of voltage testers such as Multimeters and clamp meters and the accuracy is maintained. As we strongly advise to calibrate such products, when used in combination with a proving unit peace of mind will be made to ensure accuracy is maintained between calibration intervals. Proving units can test voltages from AC and DC instruments, whilst reducing the risk of a shock or arc flash by validating the testing equipment.

What are the different types of Proving Unit?

As we know the proving units are portable making them easy to transport and use in many environments, however, there are many varieties of proving units to accommodate the vast voltage ranges of electrical equipment. For example, low voltage proving units such as the Martindale PD240 can test voltages up to 240V, great for residential appliances. If you need something capable of testing high voltage testers, then the Martindale PD690 kit is a great option by testing voltages from 12V to 700V and with a proving unit accompanied by a voltage tester in a neat carry pouch.

Proving unit can supply a range of voltages to the two-pole voltage testers to ensure a thorough test at the applied voltages. An LED light is the sign that the two-pole voltage tester is functioning correctly, allowing you to proceed with your job. Like most devices in a toolbox or bag they can be susceptible to dust, water and general knocks, that’s why it’s important to maintain a testing schedule of your voltage testers. As these aspects can affect the accuracy of voltage testers and if inaccuracies aren’t noticed then this is when safety is in doubt. RS Components offers an in-house calibration service (RSCAL) prior to delivery, but also offers a yearly service for these products.

Why Choose RS Components for a Proving Unit?

Whether you’re an electrician or another professional, then RS Components has a comprehensive range of Proving Units and Proving Unit Kits to choose from leading brands such as Martindale, Fluke, Black Star and Megger. On hand advice from our technical experts to aid your decisions and our inhouse calibration service. See more about our calibration services here.


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Description Price Test Current Rating Output Voltage Display Type Battery Type Power Source Dimensions Weight Height Length Maximum Operating Temperature Minimum Operating Temperature Model Number p Plug Type Width
RS Stock No. 193-5336
Mfr. Part No.MARPD690S
BrandMartindale
MYR694.30
Each
units
200mA 690V ac LED AA Battery 150 x 80 x 35mm 350g 35mm 150mm +40°C -10°C PD690S - 80mm
RS Stock No. 242-4111
Mfr. Part No.P240
BrandBlack Star
MYR448.64
Each
units
2mA 240V - - Battery - - - - - - 59180-8020 - -
RS Stock No. 719-0894
Mfr. Part No.RSPD690
BrandMartindale
MYR705.01
Each
units
- 700V - AA Battery 143 x 84 x 50mm 400g 50mm 143mm +40°C -10°C PD690 - 84mm
RS Stock No. 706-8586
Mfr. Part No.MTL10/PD
MYR1,203.50
Each
units
3.5mA 50 V ac/dc, 100 V ac/dc, 200 V ac/dc, 400 V ac/dc - - Mains 213 x 112 x 72mm 320g 72mm 213mm +55°C -10°C - - 112mm
RS Stock No. 144-5455
Mfr. Part No.RSVIPDLOKPRO150
BrandMartindale
MYR2,250.33
Each
units
- 690V LED - Mains - - - - - - - UK GS38 -
RS Stock No. 914-4714
Mfr. Part No.PD240
BrandMartindale
MYR483.91
Each
units
2mA 240V dc - 9V Battery 144 x 63 x 31mm 180g 31mm 144mm +40°C -10°C PD240 - 63mm
RS Stock No. 144-5454
Mfr. Part No.RSVIPDLOKPRO138
BrandMartindale
MYR1,998.75
Each
units
- 400V - - Mains - - - - - - - UK GS38 -