Martindale PD690SX
  • Martindale PD690SX
  • Martindale PD690SX
  • Martindale PD690SX
  • Martindale PD690SX

Martindale PD690SX Proving Unit

Martindale approved distributor and service centre.

Includes: MG3 magnetic hanger, 6 x 1.5V AA alkaline batteries and instruction manual.

Tax excluded
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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 PD690SX has all the capabilities of the standard PD690S proving unit plus a unique CALCHECK feature for verifying the performance of installation testers and 5 stepped voltage thresholds matched to common two pole tester thresholds.

Both the PD440SX and the PD690SX ramp output voltage down in a sequence lasting for a duration of 10s, before reducing output voltage to zero.

The CALCHECK feature may be used to check that a multifunction tester, insulation tester or continuity tester is maintaining ongoing accuracy between calibrations. There are two insulation test resistance values, 0.5MΩ and 1MΩ. There are also two continuity test resistance values, 0.5Ω and 1Ω.

The CALCHECK feature can be used as a regular check that instruments are not drifting between calibrations.


Safely proves the operation of voltage indicators and test lamps up to 690V.
Unique CALCHECK function for multifunction installation tests.
Individual LED indicators matched to voltage indicator thresholds.
Long battery life with low battery indicator.
Includes MAG3 high strength magnetic hanger.
Colour coded for voltage output.

Martindale PD Comparison
PD690S PD440SX PD690SX
Maximum Voltage Output 690V AC 440V AC 690V AC.
LED Voltage Thresholds 690V 50V, 120V, 230V, 440V. 50V, 120V, 230V, 400V, 690V.
High Voltage LED Multiple. Multiple.
Low Battery LED
High/Low Z Compatible
CALCHECK Resistance Values
Colour Coded to Match Voltage Indicators
Suitable for Multimeters, voltage testers & Drummond test lamps. Multimeters, voltage testers & Drummond test lamps. Multimeters, voltage testers & Drummond test lamps.

Martindale PD690SX Specifications
Output voltage 690/230/100/50 V nominal.
Output frequency 50 Hz nominal.
Output loading See datasheet.
CALCHECK insulation test resistance 0.5 MΩ (max test voltage 1 kV)
1.0 MΩ (max test voltage 1 kV).
CALCHECK continuity test resistance 0.5 Ω (max test current 200 mA)
1.0 Ω (max test current 200 mA).
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 1.5 V, AA alkaline batteries (IEC LR6, NEDA 15A).
Dimensions 150 x 80 x 35 mm.
Weight 350g approx. with batteries.
Martindale PD690SX warranty Two-years.


Martindale PD690SX Datasheet

PDF Specifications of the Martindale PDS & PDSX Proving Units.

Download (782.52k)

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