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 0.1m. 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 Measurement Range Sampling Time Over input indication Operating Temperature Operating Humidity Power Supply 4-Terminal Kelvin type Five ranges (see listing below) Approximately 3 times per second Indication of "1 - - -" 5F to 131F (-15C to 55C) <80% RH 8 x 1.5V AA Batteries Weight Dimensions 3.3 lbs (1.5kg) 9.8x7.5x4.3" (250x190x110 mm) with cover Range Specifications Resolution 0.1m Test Current 100mA 2000m 1m 100mA 0.5% + 2 digits 4.2V 20.00 0.01 10mA 0.5% + 2 digits 4.2V 200.0 0.1 10mA 0.5% + 2 digits 4.3V 2000 1 1mA 0.5% + 2 digits 4.4V Range 200.0m Accuracy 0.5% + 2 digits Open Circuit Voltage 4.2V 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 2 Version 2.0 1/05 Meter Description 1. 2. 3. 4. 5. 6. 7. Current Terminals Potential Measurement Terminals LCD Display Start/Stop Test Button Range Select/Power Switch LED Error Lights * No Test/Over Temperature * RP Voltage Regulation * RC Current Regulation Current/Range Table Leads Current Leads- Banana plug to alligator clip C1- Green C2- Blue Voltage Potential Leads- Banana plug to alligator clip P1- Red P2- Black Kelvin Clips- Banana Plugs (2) to Kelvin Clip Red (P1) Green (C1) Black (P2) and Blue (C2) Measurement Considerations 1. Do not apply voltage to the meter input terminals. Meter damage may result. 2. Always insure that the circuit to be measured is switched OFF, isolated and completely de-energized before connecting the test leads. 3. If the Over Temperature LED (NO TEST) indicator is lit, allow the instrument to cool down before proceeding further. 4. The RC led indicates when the test current falls out of regulation. Selecting a higher range may eliminate the condition. 5. The RP led indicates when the voltage on the device under test is too high. Selecting a lower range may eliminate the condition. 6. If either the RC or RP led is on, the measurement may be in error. 7. The current terminals are fuse protected. 8. Keep the potential test leads as short as possible. Long leads may introduce noise. 9. When using the four separate alligator clip leads always place the current leads outside the potential leads. 3 Version 2.0 1/05