Amprobe AM-100 Manuale utente

USER'S

MANUAL

AM-100

AM-105 TRMS

AM-110 TRMS

Digital

Multimeters

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.

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) 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

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

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 1000MΩhigh 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.

ΩResistance, and Continuity functions

Defaults at Ω. Press SELECT button momentarily to select Continuity function

which is convenient for checking wiring connections and operation of switches. A

continuous beep tone indicates a complete wire.

CAUTION

Using Resistance, Continuity, Diode or Capacitance function in a live circuit will

produce false results and may damage the instrument. In many cases the suspected

component must be disconnected from the circuit to obtain an accurate measurement

reading.

Diode test, Capacitance functions

Defaults at Ω. Press SELECT button momentarily 2 times to select Diode test

function. Normal forward voltage drop (forward biased) for a good silicon diode is

between 0.400V to 0.900V. A reading higher than that indicates a leaky diode

(defective). A zero reading indicates a shorted diode (defective). An OL indicates an

open diode (defective). Reverse the test leads connections (reverse biased) across the

diode. The digital display shows OL if the diode is good. Any other readings indicate

the diode is resistive or shorted (defective).

Defaults at Ω. Press SELECT button momentarily 3 times to select Capacitance

function. Relative zero mode can be used to zero out the parasitic capacitance of

the leads and the internal protection circuitry of the meter when measuring low

capacitance in the order of Pico Farad (pF).

CAUTION

Discharge capacitors before making any measurement. Large value capacitors should

be discharged through an appropriate resistance load

µA, mA, and A Current functions

Default at DC. Press SELECT button momentarily to select AC.

CAUTION

When measuring a 3-phase system, special attention should be taken to the

phase-to-phase voltage which is significantly higher than the phase-to-earth voltage.

To avoid exceeding the voltage rating of the protection fuse(s) accidentally, always

consider the phase-to-phase voltage as the working voltage for the protection fuse(s).

Beep-Jack™ Input Warning

The meter beeps to warn the user against possible damage to the meter due to

improper connections to the µA, mA, or A input jacks when other function (like voltage

function) is selected.

Temperature function (AM-110 only)

Be sure to insert the banana plug type-K temperature bead probe Bkp60 (Optional

purchase) with correct polarities. Defaults at degree C (Celsius). Press

SELECT button momentarily to select degree F (Fahrenheit). You can also use a plug

adapter (Optional purchase) with banana pins to type-K socket to adapt other type-K

standard mini plug temperature probes (refer to www.amprobe.com).

Relative zero mode

Relative zero mode allows the user to offset the meter consecutive measurements

with the displaying reading as the reference value. The display will now show readings

relative to the stored reference value. That is, display = reading - stored value. Press

the button momentarily to activate or to exit relative zero mode.

Backlighted display

Press the SELECT button for 1 second or more to turn on or off the display backlight

function.

Manual or Auto-ranging

Press the RANGE button momentarily to select manual-ranging mode, and the meter

will remain in the range it was in, the LCD symbol turns off. Press the button

momentarily again to step through the ranges. Press and hold the button for 1 second

or more to resume auto-ranging mode.

Note: Manual ranging mode feature is not available in Hz & Cx functions.

HOLD

The hold feature freezes the display for later view. Press the HOLD button

momentarily to activate or to exit the hold feature.

MAX

The max feature compares and displays the measured maximum value as fast as

25ms in a single range, and with automatic up range capability. Press the MAX

button for 1 second or more to activate or to exit the max feature in the voltage or

current functions.

Sleep Mode

The meter will enter a low power consumption sleep mode automatically to extend

battery life after approximately 30 minutes of no rotary-switch or push button

operations. To wake up the meter from sleep mode, press any buttons momentarily or

turn the rotary-switch to an adjacent position. Always set the rotary-switch to the OFF

position manually when the meter is not in use.

5) MAINTENANCE

WARNING

To avoid electrical shock, disconnect the meter from any circuit, remove the test leads

from the input jacks and turn OFF the meter before opening the case. Do not operate

with open case.

Cleaning and Storage

Periodically wipe the case with a damp cloth and mild detergent; do not use abrasives

or solvents. If the meter is not to be used for periods of longer than 60 days, remove

the batteries and store them separately

Trouble Shooting

If the instrument fails to operate, check batteries and test leads etc., and replace as

necessary. Double check operating procedure as described in this user’s manual.

If the instrument voltage-resistance input terminal has subjected to high voltage

transient (caused by lightning or switching surge to the system) by accident or

abnormal conditions of operation, the series fusible resistors will be blown off (become

high impedance) like fuses to protect the user and the instrument. Most measuring

functions through this terminal will then be open circuit. The series fusible resistors and

the spark gaps should then be replaced by qualified technician. Refer to the LIMITED

WARRANTY section for obtaining warranty or repairing service.

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