Martindale PD690SRD – 690V AC/DC Proving Unit with 5 ranges

  • Suitable for use with voltage indicators up to 690V
  • Stepped voltage output matched to two-pole tester thresholds
  • Switchable DC output mode via push button
  • Compatible with S-series magnetic hanger
  • Ideal for proving indicators and measurement devices up to 690V AC or DC in commercial and industrial applications

EAN: 5036162188701 SKU: MARPD690SRD 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 PD690SRD is fast and easy to use, instantly supplying the full test voltage for both high and low impedance voltage indicators, test lamps and meters. It comes complete with an over moulded low-profile case with magnetic hanger.

Proves the operation of voltage indicators, multimeters and test lamps up to 690V AC and is ideal for higher voltage, three phase commercial and industrial applications. Also has switchable DC output.


Output voltage 690V, 440V, 230V, 120V or 50V nominal
Output frequency DC or 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


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Maximum voltage output440V690V690V
LED voltage thresholds440V, 230V, 120V, 50V690V690V, 440V, 230V, 120V, 50V
AC output mode
DC output mode
Low Battery LED
High/Low Z compatible
Colour-coded to match voltage indicators
Suitable forMultimeters, multifunction testers, 4-500V voltage
testers & Drummond test lamps
Multimeters, multifunction testers, 4-500V voltage
testers & Drummond test lamps
Multimeters, 690V voltage
testers & Drummond MTL15
test lamp