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Martindale PD440S 440V Proving Unit

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MARPD440S
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£114.00 £95.00
Lead Time: 1-6 Days Free UK Delivery* Delivery Options

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Tracked 2-3 Working Day
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The Martindale PD440S Proving Unit is an alternative to Martindale’s industry-standard PD440 Proving Unit. It is a small, lightweight tester housed in a tough, low-profile, over-moulded case with an MG3 high-strength magnetic hanger. The Martindale PD440S Proving Unit is suitable for testing voltage indicators, two-pole testers and test lamps.

The Martindale PD440S Proving Unit is optimised for simplicity of use and to this end has a single voltage output of 440V AC. The full voltage is supplied upon contact with the instrument-under-test. The Martindale PD440S Proving Unit is part of a series of Martindale PDS and PDSX Proving Units (including 690V models) and is colour coded to indicate that it has a voltage output of 440V AC.

The Martindale PD440S Proving Unit is ideal for ensuring compliance with Electricity at Work Regulations, as it can be used to prove low- and high-impedance voltage indicators, multimeters, Drummond test lamps and two-pole voltage testers both before and after use, thereby ensuring that they are functioning correctly.

Finally, the Martindale PD440S Proving Unit has a long battery life and an Auto Power Off function. The low battery indicator alerts the user when the batteries require attention.

The Martindale PD440S Proving Unit is a safe, small, simple-to-use proving unit for quickly checking voltage indicators, test lamps and two-pole testers. It is ideal for contractors and maintenance teams.

Martindale PD440S 440V Proving Unit Key Features

  • An alternative to the industry-standard Martindale PD440 Proving Unit
  • Small, lightweight tester
  • Tough, low-profile over-moulded case
  • MG3 high-strength magnetic hanger
  • Prove low- and high-impedance voltage indicators, two-pole testers and test lamps
  • Optimised for simplicity of use
  • Single voltage output: 440V AC
  • Full voltage is supplied upon contact with the instrument-under-test
  • Colour coded to indicate a voltage output of 440V AC
  • Part of Martindale’s series of PDS and PDSX Proving Units
  • Ensure compliance with Electricity at Work Regulations
  • Long battery life
  • Auto Power Off function
  • Low battery indicator
  • A safe, small, simple-to-use proving unit
  • Quickly prove voltage indicators, test lamps and two-pole testers
  • Ideal for contractors and maintenance teams

What’s Included?

  • Martindale PD440S 440V Proving Unit
  • Martindale MG3 Magnetic Hanger
  • 6x 1.5V AA Alkaline Batteries
  • Instruction Manual 

Martindale PDS and PDSX Proving Units Comparison Chart 

PD440S PD440SX PD690S PD690SX
Maximum Voltage Output 440V AC 440V AC 690V AC 690V AC
LED Voltage Thresholds 440V 50V, 120V, 230V, 440V 690V 50V, 120V, 230V, 400V, 690V
High Voltage LED Yes Multiple Yes Multiple
Low Battery LED Yes Yes Yes Yes
High/Low Z compatible Yes Yes Yes Yes
CALCHECK resistance values No Yes No Yes
Colour coded to match voltage indicators Yes Yes Yes Yes
Suitable for Multimeters, voltage testers & Drummond test lamps Multimeters, voltage testers & Drummond test lamps Multimeters, voltage testers & Drummond test lamps Multimeters, voltage testers & Drummond test lamps
Part CodeMARPD440S

Martindale PDS & PDSX Proving Units Technical Specifications

Function PD440S PD440SX PD690S PD690SX
Electrical 
Output voltage 440V nominal 440/230/100/50V nominal 690V nominal 690/230/100/50V nominal
Output frequency 50Hz nominal 50Hz nominal 50Hz nominal 50Hz nominal
Output loading See the typical output voltage vs. loading graph in the datasheet.
Environmental
Temperature & Humidity (Operating & Storage) -10°C to 40°C at max. 70% R.H.
Altitude up to 2000m
Pollution Degree 2
General
Power 6 x 1.5V, AA alkaline batteries (IEC LR6, NEDA 15A)
Dimensions 150 x 80 x 35mm
Weight 350g approx. with batteries
CALCHECK
Insulation test resistance nominal values - 0.5MΩ (max test voltage 1kV) - 0.5MΩ (max test voltage 1kV)
1.0MΩ (max test voltage 1kV) 1.0MΩ (max test voltage 1kV)
Continuity test resistance nominal values - 0.5Ω (max test current 200mA) - 0.5Ω (max test current 200mA)
1.0Ω (max test current 200mA) 1.0Ω (max test current 200mA)
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