Martindale PD440SX 440V AC Proving Unit

The Martindale PD440SX 440V AC Proving Unit is a vital tool for ensuring electrical safety. Designed to verify the correct operation of voltage indicators and test lamps, this proving unit helps meet the requirements of the Electricity at Work Regulations. With stepped voltage outputs and a unique CALCHECK function, it provides an extra level of confidence when using multifunction installation testers.

Advanced CALCHECK Functionality

The CALCHECK feature allows users to verify insulation and low resistance ranges on multifunction testers and single-function insulation testers. By identifying potential calibration issues before testing installations, it ensures greater accuracy and reliability. The reference resistance test pads help detect calibration drift, allowing periodic checks and records to be maintained for compliance assessments.

Reliable and User-Friendly Design

Built with a tough outer case, the Martindale PD440SX handles harsh environments while staying easy to use. It features individual LED indicators for each voltage threshold from 50V to 440V, providing a clear, stepped checking process. The supplied strong magnetic hanger allows hands-free use, making testing easier and more practical.

With its stepped voltage output, quick response time, and extra CALCHECK feature, the Martindale PD440SX is a must-have tool for professionals carrying out safe isolation procedures and installation tests.

Key Features

Proves the operation of voltage indicators and test lamps up to 440V
Includes CALCHECK to verify insulation and continuity testers
Stepped voltage thresholds from 50V to 440V with LED indicators
Instantly outputs the highest voltage before stepping down automatically
Helps identify calibration drift in multifunction testers
Rugged overmoulded casing enhances durability in tough environments
Supports compliance with the Electricity at Work Regulations
Long battery life with a clear low battery indicator
Compact and lightweight design for easy transport
Includes a MAG3 high-strength magnetic hanger for hands-free operation

Reviews

There are no reviews yet.

Be the first to review “Martindale PD440SX 440V AC Proving Unit”

You must be logged in to post a review.

Specification	Details
Output Voltage	440V / 230V / 100V / 50V nominal
Output Frequency	50Hz nominal
Output Loading	See datasheet
CALCHECK Insulation Test Resistance	0.5MΩ (max test voltage 1kV) / 1.0MΩ (max test voltage 1kV)
CALCHECK Continuity Test Resistance	0.5Ω (max test current 200mA) / 1.0Ω (max test current 200mA)
Operating Temperature	-10°C to 40°C
Storage Temperature	-10°C to 40°C
Humidity (Operating & Storage)	Maximum 70% R.H.
Altitude	Up to 2000m
Pollution Degree	2
Power Supply	6 x 1.5V AA alkaline batteries (IEC LR6, NEDA 15A)
Dimensions	150 x 80 x 35mm
Weight	Approx. 350g with batteries
Compliance	Electricity at Work Regulations

Specification

Details

Output Voltage

440V / 230V / 100V / 50V nominal

Output Frequency

50Hz nominal

Output Loading

See datasheet

CALCHECK Insulation Test Resistance

0.5MΩ (max test voltage 1kV) / 1.0MΩ (max test voltage 1kV)

CALCHECK Continuity Test Resistance

0.5Ω (max test current 200mA) / 1.0Ω (max test current 200mA)

Operating Temperature

-10°C to 40°C

Storage Temperature

-10°C to 40°C

Humidity (Operating & Storage)

Maximum 70% R.H.

Altitude

Up to 2000m

Pollution Degree

Power Supply

6 x 1.5V AA alkaline batteries (IEC LR6, NEDA 15A)

Dimensions

150 x 80 x 35mm

Weight

Approx. 350g with batteries

Compliance

Electricity at Work Regulations

Drummond MTL20PD-S Test Lamp & Proving Unit

£190.95 (ex VAT)

£229.14 (inc VAT)

Safe indication of voltage between 50V and 500V AC/DC.
Right angled probes can be rotated through 90, 180 and 270 degrees.
The proving unit can be used to verify the functioning of the test lamp.
Differentiate between potentially hazardous phantom voltages and hazardous persistent voltages.

More info