MARTINDALE PD440SRD PROVING UNIT
The Martindale PD440SRD Proving Unit is a fast, simple, and reliable way to prove your voltage indicators, test lamps, and meters up to 440 V AC or DC. Designed for commercial and industrial environments, it instantly supplies the full test voltage for both high- and low-impedance devices—so you can verify instruments before and after use, reduce risk, and stay compliant.
With a compact, slimline body, over-moulded low-profile case, and magnetic hanger, the Martindale PD440SRD Proving Unit keeps hands free and workflows smooth at the panel or on the bench.
HIGH-PERFORMANCE PROVING FOR 50–440 V
Select from nominal outputs of 50 V, 120 V, 230 V, or 440 V in AC or DC. Clear LED thresholds (50/120/230/440 V) confirm the selected output at a glance, while high/low Z compatibility ensures dependable proving across a wide range of instruments—multimeters, multifunction testers, 4–500 V two-pole testers, and Drummond test lamps.
MARTINDALE PD440SRD PROVING UNIT KEY FEATURES
- 50–440 V nominal outputs (50/120/230/440 V) in AC or DC
- Instant full-voltage delivery for high- and low-impedance indicators
- LED voltage thresholds: 50 V, 120 V, 230 V, 440 V
- High/Low Z compatible for broad instrument coverage
- Over-moulded, low-profile case with magnetic hanger for hands-free use
- Slimline design: 150 × 80 × 35 mm; 355 g
- Low battery LED to avoid false reads
- Powered by 6× AA (IEC LR6) alkaline cells
- Pollution Degree 2; built for commercial/industrial environments
- 2-year warranty for confidence in the field
BUILT FOR YOUR ENVIRONMENT
Engineered for durability, the Martindale PD440SRD Proving Unit is tough enough for daily site use yet compact for toolbag carry. The magnetic hanger allows you to position the unit securely, keeping leads tidy and your focus on the task.
WHAT’S IN THE BOX
- Martindale PD440SRD Proving Unit
- 6× AA alkaline batteries (pre-installation may vary)
- Printed documentation
WHY CHOOSE THE MARTINDALE PD440SRD PROVING UNIT
When proving matters, speed and certainty are everything. With selectable AC/DC outputs across the most common thresholds, robust build quality, and high/low Z compatibility, the Martindale PD440SRD Proving Unit delivers dependable results for electricians, maintenance teams, and safety managers alike.
READY TO ELEVATE YOUR SAFETY CHECKS?
Book a demonstration with Acutest or request a fast quote today. Source the Martindale PD440SRD Proving Unit from a trusted supplier and keep your workforce confidently compliant.
FREQUENTLY ASKED QUESTIONS
Q: WHAT DOES THE MARTINDALE PD440SRD PROVING UNIT DO?
A: It generates known AC or DC voltages (50/120/230/440 V) so you can verify that your voltage indicators and meters are functioning correctly before and after use.
Q: CAN THE MARTINDALE PD440SRD PROVING UNIT OUTPUT BOTH AC AND DC?
A: Yes. It offers AC (50 Hz nominal) and DC output modes, selectable to suit the instrument you’re proving.
Q: WHICH INSTRUMENTS IS THE MARTINDALE PD440SRD PROVING UNIT COMPATIBLE WITH?
A: It’s suitable for multimeters, multifunction testers, 4–500 V two-pole voltage testers, and Drummond test lamps, including high- and low-impedance types.
Q: HOW DO I KNOW WHICH VOLTAGE IS SELECTED?
A: The unit provides clear LED thresholds at 50 V, 120 V, 230 V, and 440 V to indicate the selected nominal output.
Q: IS THE MARTINDALE PD440SRD PROVING UNIT SUITABLE FOR INDUSTRIAL SITES?
A: Yes. It features an over-moulded, low-profile case with a magnetic hanger and is rated Pollution Degree 2 for commercial/industrial environments.
Q: WHAT POWER SOURCE DOES IT USE AND HOW WILL I KNOW WHEN TO REPLACE BATTERIES?
A: It runs on 6× AA alkaline batteries and includes a low battery LED to prompt timely replacement.