Martindale PD690S 690V AC Proving Unit

  • Safely and simply proves the operation of voltage indicators and test lamps up to 690V
  • Essential for implementing effective safe isolation procedures
  • Tough overmoulded low profile design
  • Long battery life with low battery indicator
  • Includes MAG3 high strength magnetic hanger
  • Colour coded for voltage output

EAN: 5036162188497 SKU: MARPD690S Category:


Safe electrical working requires the use of a voltage indicator that has been proven with a suitable proving device before and after use to ensure the instrument is working correctly in accordance with the Electricity at Work Regulations.

The Martindale PD690S is a direct replacement for the industry standard PD690. Its voltage output is matched to the VI-15000, MTL15 Drummond test lamp and all other 690V voltage indicators and two pole testers including the VT12, VT25 and VT28.

In addition to the benefits of the industry standard Martindale PD440 and PD690 proving units, the S models feature a tough overmoulded low profile case and come with an MG3 magnetic hanger (excluding kits). They are fast and easy to use, instantly supplying the test voltage for both high and low impedance voltage indicators, test lamps and meters. On completion of the high voltage test, a low resistance appears across the terminals to verify the continuity function of two pole testers.

It’s good practice to match the output voltage of the proving unit with the voltage range of the instrument to be proved. The new S and SX Series simplify matching devices as they are colour coded with Martindale voltage indicators.


Output voltage 690V nominal
Output frequency 50Hz nominal
Output loading See datasheet
Temperature (Operating & Storage) -10°C to 40°C
Humidity (Operating & Storage) max. 70% R.H.
Altitude up to 2000m
Pollution Degree 2
Power 6 x 1.5V, AA alkaline batteries (IEC LR6, NEDA 15A)
Dimensions 150 x 80 x 35mm
Weight 350g approx. with batteries


  • Martindale VI-15000 Voltage Indicator

    • Supply powered AC/DC voltage indicator, no batteries required
    • Extended voltage range to 1000V with bright LED indication
    • Safety category CAT IV 1000V
    • GS38 and BS EN61243-3 compliant
    • Heavy duty double insulated leads
    • Polarity Indication
  • Drummond MTL15 Test Lamp

    • Four illumination bands up to 690V
    • CAT IV 1000V safety rating
    • Right angled & straight GS38 compliant probes
    • High intensity long life LED indication
    • 360° viewing angle
  • Martindale LOKKIT1 Comprehensive Lock Out Kit

    Includes 9 different locking devices for simple fitting to MCBs, RCBOs and fuse holders.
  • Martindale LOKKITPRO Ultimate Lock Out Kit

    Contains the most comprehensive range of Martindale Locking off devices for use by contractors and maintenance teams working on industrial and commercial sites.


Maximum Voltage Output440V AC690V AC690V AC
LED Voltage Thresholds440V690V50V, 120V, 230V, 400V, 690V
High Voltage LEDMultiple
Low Battery LED
High/Low Z Compatible
CALCHECK Resistance Values
Colour Coded to Match Voltage Indicators
Suitable forMultimeters, voltage testers & Drummond test lampsMultimeters, voltage testers & Drummond test lampsMultimeters, voltage testers & Drummond test lamps