Amprobe AM-100 User Manual

USER'S
MANUAL

AM-100
AM-105 TRMS
AM-110 TRMS

Digital
Multimeters

1

1) SAFETY

This manual contains information and warnings that must be followed for operating the
instrument safely and maintaining the instrument in a safe operating condition. If the
instrument is used in a manner not specified by the manufacturer, the protection
provided by the instrument may be impaired. The meter is intended only for indoor use.

The meter (all versions) is protected, against the users, by double insulation per CSA
C22.2 No. 1010-1-92, EN61010-1(1995) and IEC61010-1(1995) to CAT II 1000V &
CAT III 600V.

Protection-reinforced CE version Terminals (to COM) ratings:

V : Category II 1000 Volts AC & DC, and Category III 600 Volts AC & DC.
A / mAµA : Category III 500 Volts AC and 300 Volts DC.

PER IEC61010 OVERVOLTAGE INSTALLATION CATEGORY

OVERVOLTAGE CATEGORY II

Equipment of OVERVOLTAGE CATEGORY II is energy-consuming equipment to be
supplied from the fixed installation.
Note – Examples include household, office, and laboratory appliances.

OVERVOLTAGE CATEGORY III

Equipment of OVERVOLTAGE CATEGORY III is equipment in fixed installations.
Note – Examples include switches in the fixed installation and some equipment for
industrial use with permanent connection to the fixed installation.

Terms in this manual:

WARNING

identifies conditions and actions that could result in serious injury or even

death to the user.

CAUTION identifies conditions and actions that could cause damage or malfunction

in the instrument.

2

WARNING
To reduce the risk of fire or electric shock, do not expose this product to rain or
moisture. To avoid electrical shock hazard, observe the proper safety precautions
when working with voltages above 60 VDC or 30 VAC rms. These voltage levels pose
a potential shock hazard to the user. Do not touch test lead tips or the circuit being
tested while power is applied to the circuit being measured. Keep your fingers behind
the finger guards of the test leads during measurement. Inspect test leads, connectors,
and probes for damaged insulation or exposed metal before using the instrument. If
any defects are found, replace them immediately. Do not measure any current that
exceeds the current rating of the protection fuse. Do not attempt a current
measurement to any circuit where the open circuit voltage is above the protection fuse
voltage rating. Suspected open circuit voltage should be checked with voltage
functions. Never attempt a voltage measurement with the test lead inserted into the

µA/mA or A input jack. Only replace the blown fuse with the proper rating as specified
in this manual.

CAUTION
Disconnect the test leads from the test points before changing functions. Always set
the instrument to the highest range and work downward for an unknown value when
using manual ranging mode.

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

2) CENELEC DIRECTIVES

The instruments conform to CENELEC Low-voltage directive 73/23/EEC and
Electromagnetic compatibility directive 89/336/EEC

3

3) PRODUCT DESCRIPTION

This user's manual uses only representative model for illustrations. Please refer
specification details for function availability to each model.

1) 3-3/4 digits 4000
counts LCD display

2) Push-buttons for
special functions &
features

3) Selector to turn the
Power On or Off and
select a function

4) Input Jack (+) for 10A
(20A for 30sec) current
function

5) Input Jack (+) for all
functions EXCEPT current

(

A, mA, A) function

µ

6) Common (Ground
reference) Input Jack (-)
for all functions

7) Input Jack (+) for
milli-amp and micro-amp
functions

4) OPERATION
DC Voltage, AC Voltage, & Hz Frequency functions

4

Note:

1) AC 400.0mV range selection is by RANGE button manually, and is specified from
AC 10mV (AC 40mV for True RMS models AM-105 & AM-110) and up.

2) DC 400.0mV range is designed with 1000MΩ high input impedance for least current
drain in measuring small signals, and can cope better with most commercially available
voltage output transducers and adapters. The non-zero display reading is normal when
the meter inputs are open circuit, which will not affect actual measurement accuracy.
Open input is actually a floating condition, which is not a zero-volt-input condition. The
meter will show zero or close to zero reading when the inputs are shorted.