This is the instruction manual for the Extech 380940 True RMS Watt Clamp DMM. It is a meter that combines multimeter and clamp meter functionality in one convenient meter. Careful use of this meter will provide years of reliable service.
The Extech 380940 is a True RMS Watt Clamp DMM that combines multimeter and clamp meter functionality in one device. It features a 3-3/4 digit LCD with a 40-segment bargraph and includes functions for measuring AC/DC power, current, voltage, and frequency. The meter utilizes a Hall effect sensor for current measurements and supports both manual and automatic range selection.
| Display | 3-3/4 digit (4000 count) LCD with 40 segment bargraph |
|---|---|
| Current Sensor | Hall effect sensor type |
| Battery | Two 1.5V AA batteries |
| Operating Temperature | -10°C to 50°C (4°F to 122°F) |
| Jaw Opening | 23mm (0.9") maximum conductor size |
| Standards | IEC 1010 Category III 300V, Category II 600V |
The meter turns off automatically after 30 minutes of operation.
The meter requires two 1.5V AA batteries.
Press the DCA zero key to null the meter display before clamping.