Introduction; Unpacking And Inspection; Instrument Familiarization (Fig. 1) - Amprobe AD40B Manual De Uso

• 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).
2