User Manual

ManualsBrandsExtech ManualsIndustrial & ScientificExtech 380940 True RMS 400A AC/DC Power Clamp Meter

DC / AC True RMS Watt Clamp DMM

• 10W or 100mA resolution

• Large 3 3/4 digit LCD display with 40 segment bargraph

• Frequency Measurements

• One touch DCA zero adjust

• MIN/MAX and Data Hold functions

• 0.9” (23mm) Jaw diameter

1. INTRODUCTION

Congratulations on your purchase of Extech’s Watt Clamp Meter. This professional meter, with proper

care, will provide years of safe reliable service.

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176

FAX 781.665.0780 - TestEquipmentDepot.com

99 Washington Street

Melrose, MA 02176

Phone 781-665-1400

Toll Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

Back to the Extech 380940 Product Page

Summary of content (5 pages)

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99 Washington Street Melrose, MA 02176 Phone 781-665-1400 Toll Free 1-800-517-8431 Visit us at www.TestEquipmentDepot.com Back to the Extech 380940 Product Page DC / AC True RMS Watt Clamp DMM • 10W or 100mA resolution • Large 3 3/4 digit LCD display with 40 segment bargraph • Frequency Measurements • One touch DCA zero adjust • MIN/MAX and Data Hold functions • 0.9” (23mm) Jaw diameter 1. INTRODUCTION Congratulations on your purchase of Extech’s Watt Clamp Meter.
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. SPECIFICATIONS 2.1 General Specifications Display 3-3/4 (4000 count) Digit LCD with 40 segment bargraph Functions Watts, ACA, DCA, ACV, DCV, Frequency Polarity “-“ indicates negative polarity Current sensor Hall effect sensor type Overload indication Left blinking digit DCA zero adjust One touch zero key Display rate 2 readings/second (20 readings/second for bargraph) Auto Power Off 30 minutes after power ON Battery Two 1.5V AA batteries Operating temp.
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. FRONT PANEL DESCRIPTION 1. Current sense jaw (shown with conductor inside jaw) 2. Measurement Trigger 3. Function switch 4. Data Hold key 5. Max Min key 6. One-touch DCA zero key 7. LCD Display 8. 40 segment bargraph display 9. Handstrap 10. Positive input terminal for V,W,HZ 11. COM terminal International Symbols 4. SAFETY INSTRUCTIONS 1. NEVER exceed the specified voltage/current maximum when measuring 2. USE EXTREME CAUTION when working with high voltages. 3.
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5. OPERATION 5.1 AC+DC Power /. Watt Measurements 1) Connect the test leads to the voltage source in parallel with the load 2) Clamp on one of the wires to the load. 3) Select AC or DC voltage range and check the voltage reading. 4) Select the AC or DC current range, and check the current reading. 5) Select the appropriate Watt range. 6) Read the KW value shown on the LCD. 5.
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.5 DC Voltage Measurements WARNING: To avoid electric shock or damage to the meter, do not make any voltage measurements that exceed the maximum specified. 1) Set the Function switch to the VDC position. 2) Insert the test leads to the meter as follows: Red lead to “V,W,Hz,” terminal; Black lead to the COM input. 3) With the pointed end of the test leads measure voltage. Remember that voltage measurements are made in parallel with the device or circuit under test. 4) Read the DCV value on the LCD. 5.