The Extech Instruments Model DC400 clamp meter that measures up to 400A DC. This device is shipped fully tested and calibrated and, with proper use, will provide years of reliable service. Please visit our website (www.extech.com) to register the meter and to check for the latest version of this User Guide
Extech DC400 clamp meter DC Current Measurements 1. Set the Function switch to the 40A or 400A DC range. 2. With no conductor in the jaws, press the ZERO button to null the meter display. 3. Press the Trigger to open the current sense Jaw. 4. Fully enclose one conductor to be measured. Do not allow a gap between the two halves of the jaw. 5. Read the DCA value on the display. Data Hold To freeze the current reading on the LCD, press the HOLD button. To release the Data Hold function and return the meter to normal operation, press the HOLD button again.
Battery Replacement 1. When the low battery symbol appears on the LCD the battery must be replaced. 2. Remove the orange rubberized cover. 3. Remove the battery compartment screw. 4. Lift off the battery compartment cover and replace the 9V battery. 5. Replace compartment cover and secure the screw