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Introduction

Congratulations on your purchase of Extech model ML720 True rms

datalogging digital multimeter. Properly used, this meter will provide many

years of reliable service.

The

MultiLog™

measures

AC/DC

Voltage/Current,

Resistance,

Frequency, Capacitance, Temperature, Diode, and Continuity. The

MultiLog™ offers a built-in datalogger and an optical RS-232 interface.

The meter stores 43,000 data points in internal memory.

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 Precautions

1. Improper use of this meter can cause damage, shock, injury or death.

Read and understand this user’s manual before operating the meter.

2. Make sure any covers or battery doors are properly closed and

secured.

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

4. 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.

5. Do not exceed the maximum rated input limits.

6. Use great care when making measurements if the voltages are

greater than 25VAC rms or 35VDC. These voltages are considered a

shock hazard.

7. Always discharge capacitors and remove power from the device

under test before performing Capacitance, Diode, Resistance or

Continuity tests.