User guide

OVERVIEW

This User Manual covers information on safety and cautions. Please read the

relevant information carefully and observe all the Warnings and Notes.

Warning

To avoid electric shock or personal injury, read the “Safety Information” and

“Rules for Safe Operation” carefully before using the Meter.

Digital Multimeter Model GDM-360 (True RMS), GDM-397, GDM-398 and GDM-

461 (True RMS) (hereafter referred to as “the Meter”) are auto ranging multimeters.

The Meter can measure AC/DC Voltage and Current, Resistance, Diode,

Continuity Buzzer, Capacitance, Frequency and Temperature (˚C or ˚F), hFE and

EF function. In addition to the conventional measuring functions, there is an

RS232C or USB serial port (optional), data hold, relative mode, peak measurement

(GDM-461), low battery display, display backlight (GDM-360/397/398) and sleep

mode (GDM-398/397/360). Except where noted, the descriptions and instructions

in this User Manual apply to all models.