Lutron ET-3000 – Earth Resistance Tester

GENERAL SPECIFICATIONS

Display

18 mm (0.7″) LCD ( Liquid Crystal Display). Max. indication 1999.

Power Supply

DC 9V,
1.5V AA ( UM-3) batteries x 6 PCs.

@ Alkaline or heavy duty battery.

Function

Earth Resistance & Earth Voltage measurement.

Power Consumption

Earth Resistance
* Approx. 74 mA for stand-by

condition
* Approx. 84 mA for ON condition
@ at 1,900 ohm on 2,000 ohm range

Response Time

4 seconds on earth resistance range approximately.

1 seconds on earth voltage range approximately.

Input Terminals

3 terminal input ( E/P/C Terminals ).

Earth Voltage
Approx. 82 mA for stand-by condition.

Over input Indication

Indication of ” 1 . “.

Data Hold

To freeze the display reading value.

Dimension

160 x120 x65mm
( 6.3 x 4.7 x 3.3 inch )

Safety Standard

IEC1010.

Overload Protection

* 200V AC for 10 seconds across 2 of the 3 terminals for Earth Resistance measurement.

Weight

Approx. 560 g (1.2 LB).

Standard Accessories

Plug with alligators 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

* 300V AC for 1 minute on Earth Voltage range.

Insulation Resistance

More than 5 Meg ohm between the circuit and the housing case when measured with 500 DCV.

Power Management

Manual power On/Off or auto power

Off within 2 minutes after power On.

Operating Temp.

0 to 50 °C ( 32 to 122 °F ).

Operating Humidity

Less than 80 % R.H.

ELECTRICAL SPECIFICATIONS ( 23 ± 5 °C)

Function

Range

Resolution

Accuracy

Earth Resistance

20 ohm

0.01 ohm

± ( 2% rdg + 0.1 ohm ) @ 0 to 19.99 ohm

± ( 2% rdg + 3 d ) @ above 20 ohm.

200 ohm

0.1 ohm

2 K ohm

1 ohm ( 0.001 K ohm )

Earth Voltage

200 ACV
( 50, 60 Hz )

0.1 V

± ( 1% rdg + 4 d )