The Sanwa PDR4000 is a digital Earth resistance tester designed for measurement within the CAT II 400V and CAT III 300V ratings.

This instrument is required for inspection and maintenance of electrical construction work. The PDR4000 has a safe design compliant with the IEC-61010 standards and is IP30 rated. This device has 3 measurement ranges, 40Ω, 400Ω, and 4000Ω, and can measure the Earth’s resistance with an accuracy of 2%.

This device has a 4000 counts digital display with a backlight. It has a Data Hold function that allows users to hold or pause a measurement on the screen. It also features the Relative function that stores the existing reading (a delta) and resets the display to zero.  3-pole / 2-pole earth resistance measurement can also be performed with the PDR4000 but an optional accessory, TL-68 is required for 2-pole measurement.

The device is also capable of measuring interference voltage, but if interference voltage is greater than 10 Volts the Earth resistance measurement cannot be performed. DC elements of the interference voltage cannot be detected with this device.

• Three measurement ranges: 40Ω, 400Ω, 4000Ω
• 3-pole / 2-pole earth resistance measurement
  *Optional accessory TL-68 is required for 2-pole measurement
• 4000 Counts digital display with backlight function
• Safety design compliant to IEC61010
• Data hold function
• Relative function
• Auto power-off function
• Capable of measuring interference voltage
• 2mA measuring current

Meter includes: carrying case, test leads, hard carrying case and instruction manual.

The Sanwa PDR302 is an analog earth-resistant tester with a phase detection system circuit for high precision measurement.

This meter is used for measuring the resistance of the earth since all the equipment of the power system is connected to the earth through the earth electrode. The earth protects the equipment and personnel from the fault current.

The PDR302 has an earth resistance measuring range of 10/100/1000Ω with an accuracy of ± 5 % of full scale for Ω x 1, or ± 2.5% of full scale for Ω x 10, Ω x 100 range. The device can measure a maximum AC leakage voltage of 30 Volts with an accuracy of 2.5% of full scale. The PDR302 also features an auxiliary grounding value LED indicator that lights at approx. 10kΩ or more.

The earth resistance measurement can be initiated with a simple push button, making the unit easy to use and eliminating wasteful battery consumption.

Meter includes: test leads, clips, earth bars and carrying cases.

• Phase detection system circuit for high precision measurement
• AC 30V range to avoid indication errors caused by leak current that flows to the earth
• Power saving design with push switch
• Auxiliary grounding value excess indicator lamp