Earth Resistance Tester (ET-3000) in Case

Lutron Earth Resistance Tester (ET-3000) in Case

Features

• Earth resistance and earth voltage measurement.
• Three ranges for earth resistance measurement: 19.99 ohm, 199.9 ohm, 1.999 K ohm.
• 0 to 199.9 V range for earth voltage measurement.
• 18 mm large-size LCD display for easy read-out.
• Data hold function to freeze the display reading value.
• LSI circuit provides high accuracy, reliability, and durability.
• Manual power on/off or auto power off within two minutes after power on.
• Built-in over-input indication.
• Durable and portable plastic housing case with a front protective cover.
• Complete testing accessories included.

General Specifications

• Display: 18 mm (0.7") LCD, maximum indication 1999.
• Function: Earth resistance and earth voltage measurement.
• Response time: 4 seconds on earth resistance range, 1 second on earth voltage range.
• Input terminals: 3 terminal input (E/P/C terminals).
• Over-input indication: "1 .".
• Data hold: Freezes the display reading value.
• Safety standard: IEC1010.
• Overload protection:
  • 200V AC for 10 seconds across 2 of the 3 terminals for earth resistance measurement.
  • 300V AC for 1 minute on earth voltage range.
• Insulation resistance: More than 5 Meg ohm between the circuit and housing case when measured with 500 DCV.
• Power management: Manual power on/off or auto power off within 2 minutes after power on.
• Operating temperature: 0 to 50℃ (32 to 122℉).
• Operating humidity: Less than 80% RH.

Electrical Specifications (23 ± 5℃)

• Earth Resistance:
  • Range: 20 ohm, Resolution: 0.01 ohm, Accuracy: ± (2% rdg + 0.1 ohm).
  • Range: 200 ohm, Resolution: 0.1 ohm (0 to 19.99 ohm), Accuracy: ± (2% rdg + 3 d).
  • Range: 2 K ohm, Resolution: 1 ohm (0.001 K ohm), Accuracy: ± (2% rdg + 3 d).
• Earth Voltage:
  • Range: 200 ACV, Resolution: 0.1 V, Accuracy: ± (1% rdg + 4 d) (50, 60 Hz).

Power Supply

• Power source: DC 9V, 1.5V AA (UM-3) batteries x 6 PCs (alkaline or heavy duty).
• Power consumption:
  • Approx. 74 mA for stand-by condition on earth resistance.
  • Approx. 84 mA for on condition at 1,900 ohm on 2,000 ohm range.
  • Approx. 82 mA for stand-by condition on earth voltage.

Dimensions and Weight

• Dimensions: 160 x 120 x 65 mm (6.3 x 4.7 x 3.3 inches).
• Weight: Approx. 560 g (1.2 lbs).

Accessories Included

• Standard plug with alligator clips (Red, Green, Black).
• Red wire with red plug (AL-3KR): 1 PC.
• Green wire with green plug (AL-3KG): 1 PC.
• Black wire with black plug (AL-3KB): 1 PC.
• Auxiliary earth spikes (SP-3K): 2 PCs.
• Carrying case (CA-3K): 1 PC.