Amprobe AC40B Utilisateur Manaul - Page 3

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• Always inspect your instrument, test leads and accessories for signs

of damage or abnormality before every use. If abnormal conditions

exist (broken or damaged test leads, cracked case, display not

reading, etc.), do not use.

• When making voltage measurements, make sure these ranges

function correctly. Take a reading of a known voltage first.

• Never ground yourself when taking measurements. Do not touch

exposed metal pipes, outlets, fixtures, etc., which might be at

ground potential. Keep your body isolated from ground and never

touch exposed wiring, connections, test probe tips, or any live

circuit conductors.

• Do not operate the instrument in an explosive atmosphere

(flammable gases, fumes, vapor, dust).

• Do not use this or any piece of test equipment without proper

training. Read the operating instructions before use and follow all

safety instructions.

• Use the meter only as specified in this manual; otherwise the

meters safety circuitry may not protect you.

• Use extreme caution when working around bare conductors. Contact

with the conductor could result in electric shock.

• The ridge at the top of the clamp body is intended to keep hands and

fingers away from hazardous live conductors.

Introduction

The AD40B is an average sensing and RMS (sine wave) indicating AC

current clamp. The AC40B is an average sensing and RMS (sine wave)

indicating AC current clamp meter that also measures AC and DC voltage,

resistance and continuity.

Unpacking and Inspection

Your shipping carton should include the digital clamp meter , a carrying

case, two 1.5 V AAA (UM-2) batteries (installed), and this manual plus one

test lead set (one black, one red) for the AC40B meter. If any of the items

are damaged or missing, return the complete package to the place of

purchase for an exchange.

Instrument Familiarization (Fig. 1)

1. Transformer Jaws: Designed to pick up the AC current flowing through

the conductor.

2. Jaw Opening Lever: Press lever to open transformer jaws. When

pressure on lever is released, the jaws will close again.

3. Selector Switch: Turns instrument on and off and selects the

measuring function.

4. AC/DC selector switch (AC40B): With the selector switch set to voltage

measurement, this button selects between AC and DC voltage.

5. Data Hold Switch: Holds reading for all functions and ranges. Press

again to release HOLD before taking a new measurement.

6. Digital Display: 3-3/4 digit LCD (max reading 3999) with decimal point,

low battery N, Auto-range, Data Hold l, and unit indicators, plus,

for the AC meter: ACB, DCF, Polarity  ) and continuity R.

7. Input Terminals (AC meters): Connect the black test lead to the "COM"

input and red lead to the "+" input when measuring voltage, resistance

and continuity (AC40B).