User Manual

Version 2.0 1/05
2
Introduction
Congratulations on your purchase of Extech’s Model 380580 Battery Powered Milliohm
Meter. This device offers five resistance ranges with resolution as low as 0.1mΩ. The 4-wire
Kelvin clip connection ensures optimum accuracy. Typical applications include transformer,
motor coil, and PC Board resistance measurements. This professional meter, with proper
care, will provide years of safe reliable service.
Specifications
General Specifications
Display 1.0" (25 mm) LCD (1999 counts)
Measurement terminals 4-Terminal Kelvin type
Measurement Range Five ranges (see listing below)
Sampling Time Approximately 3 times per second
Over input indication Indication of "1 - - -"
Operating Temperature 5ºF to 131ºF (-15ºC to 55ºC)
Operating Humidity <80% RH
Power Supply 8 x 1.5V AA Batteries
Weight 3.3 lbs (1.5kg)
Dimensions 9.8x7.5x4.3" (250x190x110 mm) with cover
Range Specifications
Range Resolution
Test
Current Accuracy
Open Circuit
Voltage
200.0mΩ 0.1mΩ
100mA ± 0.5% + 2 digits 4.2V
2000mΩ 1mΩ
100mA ± 0.5% + 2 digits 4.2V
20.00Ω 0.01Ω
10mA ± 0.5% + 2 digits 4.2V
200.0Ω 0.1Ω
10mA ± 0.5% + 2 digits 4.3V
2000Ω 1Ω
1mA ± 0.5% + 2 digits 4.4V
International Symbols
This symbol, adjacent to another symbol or terminal, indicates the user must
refer to the manual for further information.
This symbol, adjacent to a terminal, indicates that, under normal use,
hazardous voltages may be present
Double insulation