Amprobe AM-42 User Manual - Page 2

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INTERNATIONAL ELECTRICAL SYMBOLS

Caution ! Refer to the explanation in this Manual

Caution ! Risk of electric shock

Earth (Ground)

Double Insulation or Reinforced insulation

Fuse

AC--Alternating Current

DC--Direct Current

3) CENELEC DIRECTIVES

The instrument conforms to CENELEC Low-voltage directive 73/23/EEC and Electromagnetic compatibility

directive 89/336/EEC

4) OPERATION

Note: All function operations described hereafter are via the Red test lead for positive (+) polarity and Black test

lead for Ground reference (-), or otherwise specified

4-1) FUNCTIONS IN "Auto V.Ω" POSITION (AM-47 & AM-45 only)

-Quick Start (AM-47 & AM-45 only)

AutoCheck

mode is the default function in "Auto V.Ω" position. Press the SELECT button momentarily to select

and step through the functions: AutoCheck

-AutoCheck

mode (AM-47 & AM-45 only)

This innovative AutoCheck

based on the input via the test leads.

●With no input, the meter displays "Auto" when it is ready.

●With no voltage signal but a resistance below 6MΩ is present, the meter displays the resistance value. When

below 25Ω is present, the meter AM-47 produces a continuity beep tone.

●When a signal above the threshold of DC 1.2V or AC 1.5V up to the rated 600V (450V for AM-45) is present; the

meter displays the appropriate voltage value in DC or AC, whichever larger in peak magnitude.

●Overload-Alert Feature: When above rated 600V (450V for AM-45) is present; the meter displays "OL" with a

warning beep tone. Disconnect the test leads from the signal immediately to avoid hazards.

Note:

*Range-Lock Feature: When a measurement reading is being displayed in AutoCheck

SELECT button momentarily 1 time can lock the function-range it was in. The LCD annunciator "

off. Range-lock can speed up repetitive measurements. Press the SELECT button momentarily again to return to

AutoCheck

mode.

*Hazardous-Alert: When making resistance measurements in AutoCheck

voltage readings alerts you that the part under test is still energized.

*AutoCheck

nominal input impedances are slightly lower than that of common digital multimeters. They are, in

fact, more similar to that of most traditional analog multimeters. "LoZ" will display on the LCD to remind the users

in such cases. Although not likely, if such impedance might damage your circuits, use the common impedance

(Hi-Z) voltage mode (AM-47 and AM-42 only) for making voltage measurements on them.

-Continuity, Audible With Symbolic Display (AM-47 & AM-45 only)

From AutoCheck

with "Auto" being displayed, press the SELECT button momentarily 1 time to select Continuity

function. The meter displays a symbolic open-switch display "

checking wiring connections and operation of switches. A continuous beep tone with a symbolic closed-switch

display "

" indicates a complete circuit. In noisy environments, it is helpful to "see" continuity measurements.

→Continuity→EF→ACV→DCV→

feature automatically selects measurement function of DCV, ACV or Resistance (Ω)

Ω →Hz→Cx→AutoCheck

mode, an unexpected display of

" when it is ready. Continuity is convenient for

mode, press the

" turns