Description
Lutron ET3000 Earth Resistance Tester Specifications
Measurement Capabilities
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Measures earth resistance and earth voltage
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Resistance ranges:
0.0019.99
0.0199.9
01999 -
Resolution:
0.01, 0.1, 1 respectively -
Accuracy:
(2% of reading + 0.1) in 20 range
(2% of reading + 3 digits) in 200 and 2000 ranges -
Earth voltage measurement:
0199.9V AC (50/60Hz)
Resolution: 0.1V
Accuracy: (1% of reading + 4 digits)
Display & Response
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Display type: Large 18mm (0.7) LCD
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Max display count: 1999
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Data hold function: Yes
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Response time:
Resistance: ~4 seconds
Voltage: ~1 second -
Over-input indication: Displays 1 . when input exceeds range
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Power-off modes: Manual switch or auto power-off (~2 minutes of inactivity)
Electrical & Safety Features
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Input configuration: Standard 3terminal setup (E, P, C)
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Safety compliance: IEC 1010 standard
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Overload protection:
Resistance mode: Up to 200V AC for 10 seconds between terminals
Voltage mode: Up to 300V AC for 1 minute -
Insulation resistance: 5M between circuit and casing, tested at 500V DC
Power & Environmental Specs
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Power supply: 6 AA batteries (DC 9V total)
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Current consumption:
Resistance mode: ~7484mA
Voltage mode: ~82mA -
Operating temperature: 0C to 50C
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Operating humidity: 80% RH (non-condensing)
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Storage temperature: 20C to +60C
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Storage humidity: 90% RH (non-condensing)
Physical Details
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Dimensions: 160 120 65mm
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Weight: Approx. 560g (including batteries)
Included Accessories
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Test leads (red, green, black with alligator clips)
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Auxiliary earth spikes (2)
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Carrying case
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User manual
Quick Summary Table
| Feature | Specification |
|---|---|
| Earth Resistance | 19.99, 199.9, 1999 ranges |
| Earth Voltage | 0199.9V AC (50/60Hz) |
| Display | 18mm LCD, 1999 max count |
| Resolution | 0.01 / 0.1 / 1 |
| Accuracy | (2% + 0.1) or (2% + 3 digits) |
| Voltage Accuracy | (1% + 4 digits), resolution 0.1V |
| Overload Protection | 200V AC / 300V AC |
| Power Supply | 6 AA (UM3) batteries |
| Auto Power Off | Yes (~2 minutes inactivity) |
| Operating Temp / RH | 0C50C / 80% RH |
| Storage Temp / RH | 20C60C / 90% RH |
| Dimensions / Weight | 160 120 65mm / ~560g |
| Accessories Included | Test leads, ground spikes, case, manual |
