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Summary of Contents for Extech Instruments 380947
- Page 1 User Guide True RMS AC/DC Mini Clamp Meter Model 380947...
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Page 2: Meter Description
Introduction Congratulations on your purchase of the Extech 380947 True RMS Clamp Meter. This Clamp meter measures current up to 400A DC/AC and measures Frequency up to 100 kHz. Careful use of this meter will provide years of reliable service. -
Page 3: Display Icons
Display icons Low battery Direct current Alternating current Minus sign AUTO Automatic range (frequency only) Auto power off ZERO Zero function HOLD HOLD function Highest reading Lowest reading Current unit of measure Prefix MEGA (millions of units) Prefix KILO (thousands of units) Hertz (unit of measure for frequency) Over-range (for readings above 4032) Bargraph display... -
Page 4: Operation
Operation AC Current Measurements WARNING: To avoid electric shock, disconnect the test leads from the meter before making current measurements. 1. Set the Function switch to the 4, 40, 100, or 400A AC range. 2. Press the Trigger to open the clamp jaw. 3. -
Page 5: Specifications
Zero button for Relative Measurements Press the Zero key and the present measurement will Zero. All subsequent measurements are displayed with respect to the zeroed reading. For example, if a 20A reading is zeroed and a 30A reading is subsequently measured, the LCD will display 10A. - Page 6 Range Specifications DC Current Resolution Accuracy (of rdg + digits) Overload Protect 10mA ±(1.0% + 2d) 400A DC 400A (0 to 150A) 100mA ±(1.0% + 2d) 400A DC 400A (150 to 200A) 100mA ±(2.2% + 2d) 400A DC 400A (200 to 400A) 100mA ±(4.0% + 2d) 400A DC...
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