Portable Digital Earth Tester

Sanwa PDR4000 Portable Digital Earth Tester

Ensure the safety and integrity of your electrical systems with the Sanwa PDR4000, a robust and reliable portable digital earth tester. Engineered for precision and user safety, this instrument is indispensable for professionals involved in the inspection, installation, and maintenance of electrical infrastructure.

The PDR4000 is built to the highest safety standards, compliant with IEC-61010 for CAT II 400V and CAT III 300V environments, and features an IP30 rating for protection. It’s designed to deliver accurate earth resistance measurements, which are critical for verifying that grounding systems can effectively protect people and equipment from electrical faults.

Key Features and Functions:

• Versatile Measurement Ranges: The device offers three distinct measurement ranges to suit various applications: 40Ω, 400Ω, and 4000Ω. This flexibility allows for precise readings across different soil conditions and electrode configurations, with an impressive accuracy of ±2%.
• Clear and Readable Display: A large, 4000-count digital display with a bright backlight ensures that measurements are easy to read in any lighting condition, from dark basements to bright outdoor sites.
• Dual Measurement Methods: The PDR4000 supports both 3-pole (fall-of-potential) and 2-pole earth resistance measurements. The 2-pole method, ideal for quick checks and continuity testing, requires the optional TL-68 accessory.
• User-Friendly Functions:
  • Data Hold: Freeze the current reading on the screen with the touch of a button, allowing you to record measurements accurately without having to memorize them.
  • Relative Function: This function allows you to set a baseline measurement and then display subsequent readings relative to that stored value, making it easy to track deviations or compare results.
• Interference Voltage Detection: The tester is capable of measuring AC interference voltage up to 400V. For safety and accuracy, the device will prevent an earth resistance test from being performed if the interference voltage exceeds 10V.
• Efficient and Safe Operation: The PDR4000 uses a constant current inverter (820Hz, approx. 2mA) for its measurement system, ensuring stable and reliable readings. The device also includes an auto power-off function to conserve battery life.

What's in the Box? The Sanwa PDR4000 comes as a complete kit, ready for fieldwork. It includes:

• PDR4000 Digital Earth Tester
• Standard Test Leads for 3-pole measurement
• Durable Hard Carrying Case
• Instruction Manual

Technical Specifications:

• Measuring System: Constant current inverter (approx. 820Hz, 2mA)
• Measurement Ranges & Accuracy:
  • Earth Resistance:
    • 40Ω Range: 0.00-10.00Ω (±2%+10dgt), 10.01-40.00Ω (±2%+3dgt)
    • 400Ω Range: 0.0-400.0Ω (±2%+3dgt)
    • 4000Ω Range: 0-3000Ω (±2%+3dgt)
  • AC Voltage: 0-400V (±2%+3dgt)
• Power Source: 6 x R6P (AA) 1.5V batteries
• Dimensions & Weight: H163 × W102 × D50mm / Approx. 440g (including batteries)

Whether you are an electrical contractor, a maintenance technician, or a utility engineer, the Sanwa PDR4000 provides the accuracy, safety, and durability needed to perform essential grounding tests with confidence.