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 Width
RS Stock No. 881-2775
Mfr. Part No.PRV240
BrandFluke
$276.00
Each
units
- - - AA Battery 117 x 74 x 28mm 200g 28mm 117mm +50°C -10°C PRV240 74mm
RS Stock No. 719-0894
Mfr. Part No.RSPD690
BrandMartindale
$235.42
Each
units
- 700V - AA Battery 143 x 84 x 50mm 400g 50mm 143mm +40°C -10°C PD690 84mm
RS Stock No. 897-7131
Mfr. Part No.RSVT25/PD
BrandMartindale
$413.23
Each
units
3.5mA 700V - AAA Battery 143 x 84 x 50 (Proving Unit) mm, 205 x 67 x 27 (Indicator) mm - 50mm 143mm +40°C -10°C - 84mm
RS Stock No. 242-4111
Mfr. Part No.P240
BrandBlack Star
$139.89
Each
units
2mA 240V - - Battery - - - - - - 59180-8020 -
RS Stock No. 704-7756
Mfr. Part No.VIP100 / SP200
$255.33
Each
units
3.5mA 50 → 690V LED AA Battery 130 x 65 x 49mm 350g 49mm 130mm +40°C -10°C - 65mm
RS Stock No. 704-7750
Mfr. Part No.VIP150 / SP200
$294.31
Each
units
3.5mA 50 → 690V LED AA Battery 130 x 65 x 49mm 350g 49mm 130mm +40°C -10°C - 65mm
RS Stock No. 914-4714
Mfr. Part No.PD240
BrandMartindale
$167.14
Each
units
2mA 240V dc - 9V Battery 144 x 63 x 31mm 180g 31mm 144mm +40°C -10°C PD240 63mm
RS Stock No. 740-1479
Mfr. Part No.PD440
BrandMartindale
$207.81
Each
units
- 440V - AA Battery 143 x 84 x 50mm 400g 50mm 143mm +40°C -10°C PD440 84mm
RS Stock No. 897-7135
Mfr. Part No.RSVT28/PD
BrandMartindale
$405.39
Each
units
3.5mA 700V LCD AAA Battery 143 x 84 x 50 (Proving Unit) mm, 205 x 67 x 27 (Indicator) mm - 50mm 143mm +40°C -10°C - 84mm
RS Stock No. 706-8586
Mfr. Part No.MTL10/PD
$375.24
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. 146-2603
Mfr. Part No.PRV240FS
BrandFluke
$304.00
Each
units
- - LED AA Battery 7.4 x 2.8 x 11.7mm 230g 11.7mm 7.4mm +50°C -10°C PRV240FS 2.8mm
RS Stock No. 181-5014
Mfr. Part No.1001-561
BrandMegger
$159.43
Each
units
- 50 → 690V LED AA Battery 130 x 48 x 68mm 346g 68mm 130mm +40°C -10°C Mpu690 48mm
RS Stock No. 706-8589
Mfr. Part No.MTL20/PD
$406.31
Each
units
28mA 50 V ac/dc, 100 V ac/dc, 200 V ac/dc, 400 V ac/dc - - Mains 213 x 112 x 72mm 350g 72mm 213mm +55°C -10°C - 112mm
RS Stock No. 2552221764
Mfr. Part No.PRV240FS Std CAL
BrandFluke
$519.00
Each
units
- - - - - - - - - - - - -
RS Stock No. 2552221763
Mfr. Part No.PRV240 Std CAL
BrandFluke
$491.00
Each
units
- - - - - - - - - - - - -