2 - - _v2.7 /22 380580 en US 10
Introduction
Congratulations on you Model 380580 Battery Powered Milliohm Meter. This device r purchase of Extech’s
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.
Meter Description
1. Current Terminals
2. Potential Measurement Terminals
3. LCD Display
4. Start/Stop Test Button
5. Range Select/Power Switch
6. LED Error Lights
• No Test/Over Temperature
• RP Voltage Regulation
• RC Current Regulation
7. Current/Range Table
Leads
Current Leads- Banana plug to alligator clip
- Green C1
- Blue C2
Voltage Potential Leads- Banana plug to alligator clip
- Red P1
- Black P2
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.