User’s Guide 99 Washington Street Melrose, MA 02176 Phone 781-665-1400 Toll Free 1-800-517-8431 Visit us at www.TestEquipmentDepot.com Model 380580 Back to the Extech 380580 Product Page Battery Powered Milliohm Meter Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 FAX 781.665.0780 - TestEquipmentDepot.
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.
Meter Description 1. 2. 3. 4. 5. 6. 7.
Preliminary Checks Current Regulation Check 1. Connect the current leads C1 and C2 to the meter. 2. Set the function switch to the 200.0mΩ range. 3. Momentarily press the TEST RP button. The meter will intermittently beep and RC will light 4. Short the current leads C1 to C2. 5. The RC LED should go off, indicating that the meter is operating correctly. 6. Momentarily press the TEST RP button to stop the test 7. The meter will return to NO TEST status. Voltage Measurement check 1.
Measurement Procedure 1. Select the desired measuring range on the meter. If the resistance of the device is unknown, start with the highest range and work downward. 2. Clip the test leads onto the device under test. Note: When using the 4-wire/4 alligator clip test leads, it is recommended that the current test leads be outside of the potential test leads (as shown in the diagram below). 3. For a short test duration of 10 seconds, press the TEST RP button for less than 2 seconds.
Measurement Principles The test current flows through the resistance from the Current+ (C+) terminal to the Current - (C-) terminal. The P+ and P- (POTENTIAL) terminals measure the voltage drop across the device under test only, thus eliminating the lead and contact resistances.
BATTERY INSTALLATION WARNING: To avoid electric shock, disconnect the test leads from any source of voltage before removing the battery cover. 1. Turn power off and disconnect the test leads from the meter. 2. Open the rear battery cover by removing two screws (B) using a slotted head screwdriver. 3. Insert the batteries into battery holder, observing the correct polarity. 4. Put the battery cover back in place. Secure with the screws. REPLACING THE FUSES There are three fuses: Power Supply Fuse 1.
