Extech Instruments 380950 User Manual

User's Guide

Model 380950
80A Mini AC/DC Clamp Meter

99 Washington Street
Melrose, MA 02176

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

Visit us at www.TestEquipmentDepot.com

Introduction

Congratulations on your purchase of the Extech 80A Mini AC/DC Clamp Meter. The Model
380950 measures AC/DC Current, AC/DC Voltage, Resistance, Frequency, Capacitance,
Duty Cycle, Diode Test, and Continuity. This clamp meter is shipped fully tested and
calibrated and, with proper use, will provide years of reliable service.

Safety

International Safety Symbols

This symbol, adjacent to another symbol or terminal, indicates the user must refer
to the manual for further information.

This symbol, adjacent to a terminal, indicates that, under normal use, hazardous
voltages may be present

Double insulation

SAFETY NOTES

• Do not exceed the maximum allowable input range of any function.

• Do not apply voltage to meter when resistance function is selected.

• Set the function switch OFF when the meter is not in use.

• Remove the battery if meter is to be stored for longer than 60 days.

WARNINGS

• Set function switch to the appropriate position before measuring.

• When measuring volts do not switch to current/resistance modes.

• Do not measure current on a circuit whose voltage exceeds 240V.

• When changing ranges always disconnect the test leads from the circuit under test.

CAUTIONS

• Improper use of this meter can cause damage, shock, injury or death. Read and
understand this user manual before operating the meter.

• Always remove the test leads before replacing the battery or fuses.

• Inspect the condition of the test leads and the meter itself for any damage before

operating the meter. Repair or replace any damage before use.

• Use great care when making measurements if the voltages are greater than 25VAC
rms or 35VDC. These voltages are considered a shock hazard.

• Always discharge capacitors and remove power from the device under test before
performing Diode, Resistance or Continuity tests.

• Voltage checks on electrical outlets can be difficult and misleading because of the
uncertainty of connection to the recessed electrical contacts. Other means should be
used to ensure that the terminals are not "live".

• If the equipment is used in a manner not specified by the manufacturer, the protection
provided by the equipment may be impaired.

Function Maximum Input

A AC, A DC 80A DC/AC
V DC, V AC 600V DC/AC
Resistance, Frequency, Diode Test 250V DC/AC

380950 V1.0 6/07 2

Meter Description

1. Conductor jaws

2. Jaw opening trigger

3. Function select switch

4. LCD Display

5. ZERO button

6. Data Hold and Backlight Button

7. Mode select button

8. Range select button

9. Hz/%/Duty Cycle button

10. COM input jack

11. V/Ω/Hz jack

12. Battery cover (rear)

AC AC (alternating current)
DC DC (direct currrent)

Minus sign

AUTO AutoRange mode
ZERO ZERO mode

Audible Continuity

•)))
HOLD Data Hold mode

Diode test mode

m milli
V Volts
A Amps
K kilo
M Mega

Ω Ohms

Low Battery icon

380950 V1.0 6/07 3