Extech Instruments 380942 Instruction Manual

INSTRUCTION MANUAL

Model 380942
True RMS AC/DC 30A Mini Clamp-on Meter

• True RMS AC Current and Voltage

• Measure low current with high resolution to 0.1mA AC and 1mA DC

• Auto Power Off

• One touch DCA zero adjust

• MIN/MAX and Data Hold functions

• 0.9” (23mm) Jaw diameter

Introduction

Congratulations on your purchase of the Extech Model 380942 DC/AC Clamp Meter.
This meter is shipped fully tested and calibrated and, with proper use, will provide years
of reliable service.

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Model 380942 Version 2.0 July 2006

2

Specifications

General Specifications

Display 3-3/4 digit (4000 count) LCD with 40 segment bargraph
Functions ACA, DCA, ACV, DCV
Polarity Minus sign ( - ) 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)
Battery Two 1.5V AA batteries
Operating conditions 4oF to 122oF (-10oC to 50oC); < 85% Relative Humidity
Storage conditions - 4oF to 140oF (-20oC to 60oC); < 75% Relative Humidity
Altitude Operate at less than 2000 meters (for indoor use only)
Power consumption Approximately 10mA DC
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

Function Range Resolution Accuracy Overload

protect

4000mA 1mA 40A DC DC Current
30A 10mA

± (2.0% + 3d)

100A DC
50/60Hz 40 to 100Hz
400mA 0.1mA ±(1.5% + 5d) ±(2.0% + 5d) 40A AC
50/60Hz 40 to 1kHz
4000mA 1mA ±(2.5% + 5d) ±(3.0% + 5d) 40A AC

AC Current

(True RMS)

30A 10mA ±(2.0% + 5d) ±(2.5% + 5d) 100A AC

DC Voltage 400V 0.1V ± (1.0% + 2d) 1000V DC

50/60Hz 40 to 1kHz AC Voltage

(True RMS)

400V 0.1V ±(1.5% + 4d) ±(2.0% + 5d) 800V AC

Specification Notes

• AC Voltage and Current Crest Factor: < 3

• AC / DC Voltage Input Impedance: 10MΩ

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