Extech Extech 380947 Manual

99 Washington Street
Melrose, MA 02176

Phone [phone]
Toll Free 1-800-517-8431

User's Guide

Visit us at www.TestEquipmentDepot.com

DC / AC True RMS Clamp Meter

Model 380947

1

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

FAX [phone] - TestEquipmentDepot.com

380947 Ver. 2.2 03/05

oral, is expressed or implied.

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.

Safety

1. NEVER exceed the specified voltage/current maximum

2. USE EXTREME CAUTION when working with high voltages.

3. NEVER operate the meter unless the back cover and the battery/fuse door are in place
and fastened securely.

International Safety Symbols

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380947 Ver. 2.2 03/05

Specifications

General Specifications

Display 3-3/4 Digit LCD with 40 segment bargraph
Functions Current (ACA, DCA) and Frequency (Hz)
Polarity “-“ indicates negative polarity (positive polarity assumed)
Current sensor Hall effect
Overload Display indicates “1___” or “-1___”
DCA zero adjust One-touch zero key (also used as a Relative function)
Display rate 2 readings/second (20 readings/second for bargraph)
Battery Two 1.5V AA batteries
Operating temperature 40F to 1220F (-100C to 500C)
Operating Humidity < 85% RH
Power consumption 10mA DC approx.
Weight 6.2 oz. (190g) including battery
Dimensions 7.2 x 2.5 x 1.4” (183 x 63.6 x 35.6mm) (H x W x D)
Jaw opening 0.9” (23mm)
Standards IEC 1010 Category III 300V, Category II 600V

Range Specifications

DC Current Resolution Accuracy (of rdg + digits) Overload Protect

40A 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

AC Current Resolution 50/60Hz 40Hz - 1kHz Overload Protect

4A (0 to 500mA) 1mA ±(1.5% + 7d) ±(2.0% + 7d) 400A AC
4A (500mA to 4A) 1mA ±(1.5% + 3d) ±(2.0% + 4d) 400A AC
40A 10mA ±(1.5% + 3d) ±(2.0% + 4d) 400A AC
100A (0 to 100A) 100mA ±(1.5% + 3d) ±(2.0% + 4d) 500A AC
400A (100 to 200A) 100mA ±(2.2% + 3d) ±(2.5% + 4d) 500A AC
400A (200 to 400A) 100mA ±(4.0% + 3d) ±(5.0% + 4d) 500A AC

Frequency (Hz) Resolution Accuracy Sensitivity Overload Protect

40Hz to 250Hz 0.01 to 0.1Hz ±(0.5% + 2d) 3.0A 500A AC
250Hz to 10kHz 0.1 to 1Hz ±(0.5% + 2d) 0.3A 500A AC

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

FAX [phone] - TestEquipmentDepot.com

380947 Ver. 2.2 03/05