Amprobe PM51A Manuale utente

PM51A

Pocket Multimeter

Users Manual

•Mode d’emploi

•Bedienungshandbuch

•Manual d’Uso

•Manual de uso

PN 2728847

July 2006

English

SELECTSELECT

PM51A

ALCD display

BRotary switch to select functions and to turn the power on or off

CSELECT-button to select alternate functions.

DPermanently attached red test lead for positive (+) polarity and black test lead for ground

reference (-)

EHOLD button to freeze the display for later viewing.

PM51A Pocket Meter

Contents

Introduction......................................................................................................................2

Safety Information............................................................................................................2

Symbols Used in this Manual ........................................................................................3

Making Measurements .....................................................................................................3

Selecting Functions........................................................................................................3

V dc and V ac Functions ................................................................................................3

Resistance, Continuity, Diode, and Capacitance Functions ............................................4

Frequency Function........................................................................................................5

Additional Features ........................................................................................................5

Product Maintenance........................................................................................................5

Maintenance ..................................................................................................................5

Cleaning.........................................................................................................................5

Troubleshooting.............................................................................................................5

Battery Replacement......................................................................................................6

Limited Warranty and Limitation of Liability .....................................................................6

Repair ...............................................................................................................................7

Specifications ...................................................................................................................7

Introduction

The PM51A meter is a shirt-pocket size meter only 19 mm (.75 in) wide and weighing less than 85 g

(3 oz). With full functionality offering AC and DC voltage to 600 V, resistance to 40 MΩ, capacitance

to 300 µF, frequency to 1 MHz, continuity with beeper, and diode test. Fully autoranging, the PM51A

offers seven different measurement functions with 27 full ranges of measurement. The digital display

is oversized with large digits and icons in the display. In spite of its small size, the PM51A is full

safety rated to CAT III 300 V, CAT II 600 V, and is UL listed. No other meter offers this size with such

performance and high safety ratings.

Safety Information

•The PM51A Digital Multimeter is certified for cULus and EN61010-1:2001; CAT II 600 V, CAT III

300 V, class 2 and pollution deg. 2.

•This instrument is EN61010-1 certified for Installation Category II

(600 V). It may only be used to make measurements on energy limited circuits within equipment

and not directly connected to mains.

•This instrument is EN61010-1 certified for Installation Category III

(300 V). It is recommended for use with local level power distribution, appliances, portable

equipment, etc., where only smaller transient overvoltages may occur, and not for primary supply

lines, overhead lines and cable systems.

•Do not exceed the maximum overload limits per function (see specifications) nor the limits

marked on the instrument itself. Never apply more than 600 V between the test lead and earth

ground.

•Inspect the DMM, test leads and accessories before every use. Do not use any damaged part.

•Never ground yourself when taking measurements. Do not touch exposed circuit elements or test

probe tips.

•Do not operate the instrument in an explosive atmosphere.

•Exercise extreme caution when: measuring voltage >20 V // current >10 mA // AC power line with

inductive loads // AC power line during electrical storms // current, when the fuse blows in a

circuit with open circuit voltage > 600 V // servicing CRT equipment.

•Remove test leads from circuit before opening the case.

Symbols Used in this Manual

N Battery WRefer to the manual

TDouble insulated XDangerous Voltage

FDirect Current JEarth Ground

BAlternating Current RAudible tone

PComplies with EU directives >

Underwriter Laboratories, Inc.

Making Measurements

All measurements described in this manual use the red test lead for positive (+) polarity and the

black test lead for ground reference (-) unless otherwise specified.

Power On and Off

Turn the rotary switch to turn the power ON or OFF.

Selecting Functions

Select measurement as shown in the diagram on the back of the meter.

V dc and V ac Functions

Rotate the rotary selector to the Vposition. V dc is the default function. The dc annunciator F

appears on the display. Press the SELECT button momentarily to select V ac. The ac annunciator B

appears on the display.

Resistance, Continuity, Diode, and Capacitance Functions

•Turn the rotary switch to the Ω/R/G/position. Resistance is the default function.

1. Turn off power to the circuit being measured. Never measure resistance across a voltage source

or on a powered circuit.

2. Discharge any capacitors that may influence the reading.

3. Connect the test probes across the resistance.

4. Read the display. If OL appears on the highest range, the resistance is too large to be measured

or the circuit is an open circuit.

•A continuous beep tone indicates a complete circuit.

1. Turn off power to the circuit being measured.

2. Discharge any capacitors that may influence the reading.

3. Connect the test probes across the resistance or two measurement nodes.

4. Listen for the tone that indicates continuity (< 120 Ω).

•Press the SELECT button momentarily AGAIN to select Diode test function. The annunciator G

appears on the display. The reading shows the approximate voltage drop across the test leads.

Normal forward voltage drop (forward biased) for a good silicon diode is between 0.400 V to

0.900 V. A reading higher than that indicates a leaky diode (defective). A zero reading indicates a

shorted diode (defective). 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 defective.

•Press the SELECT button momentarily AGAIN to select the Capacitance function.

1. Turn off power to the circuit being measured.

2. Discharge the capacitor using a 100 kW resistor.

3. Free at least one end of the capacitor from the circuit.

4. Connect the test probes across the capacitor.

5. Read the display.

Frequency Function

Turn the rotary switch to the Hz position to select the frequency function.

This function is set only at the highest input sensitivity mainly for measuring small electronic signals

below 20 V ac rms.

1. Connect the test probes to the signal source.

2. Read the display.

Additional Features

HOLD and 30 ms MAX HOLD Modes

HOLD mode freezes the display for later viewing. Press the HOLD button momentarily to activate or

to exit the Hold feature.

MAX mode captures voltage signals that have durations as short as 30 ms (milliseconds) within a

single range, and has automatic up range capability. This feature is available in V dc and V ac

functions. Press the HOLD button for 1 second or more to activate or exit MAX mode.

XWWARNING

Hazardous voltages present at test leads may not be displayed when in HOLD

mode.

Auto-ranging

If the function selected has more than one range, the meter will auto-range to the best range and

resolution.

Product Maintenance

Maintenance

Do not attempt to repair this meter. It contains no user serviceable parts. Repair or servicing should

only be performed by qualified personnel.

Cleaning

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 battery and store it

separately

Troubleshooting

If the instrument fails to operate, check battery, leads, and replace as necessary. Double check

operating procedure as described earlier in this manual. Refer to the LIMITED WARRANTY section

for obtaining warranty or repairing service.

Battery Replacement

If the meter starts up with persistent resetting display or with low battery icon Nturns on, replace

the battery. The meter uses one 3 V coin battery, IEC-CR2032.

To replace the battery

1. Turn off the meter and disconnect the test leads from live circuits.

2. Loosen the screw on the case bottom.

3. Lift the end of the case bottom nearest the input test leads until it unsnaps from the case top.

Replace the battery cover and tighten the screw. Recycle the battery using approved methods.

4. Replace the battery. Observe battery polarities with positive (+) faces up (towards the case

bottom). Replace the case bottom, and ensure that the snap on the case top (near the LCD side)

is engaged.

5. Replace and tighten the screw.

XWWARNING

To avoid electrical shock, disconnect test leads from live circuits before opening

the case. Do not operate with open case.

Limited Warranty and Limitation of Liability

Your Amprobeproduct will be free from defects in material and workmanship for 1 year from the

date of purchase. This warranty does not cover fuses, disposable batteries or damage from accident,

neglect, misuse, alteration, contamination, or abnormal conditions of operation or handling.

Resellers are not authorized to extend any other warranty on Amprobe’s behalf. To obtain service

during the warranty period, return the product with proof of purchase to an authorized Amprobe

Test Tools Service Center or to a Amprobedealer or distributor. See Repair Section for details.

THIS WARRANTY IS YOUR ONLY REMEDY. ALL OTHER WARRANTIES - WHETHER EXPRESS,

IMPLIED OR STAUTORY - INCLUDING IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR

PURPOSE OR MERCHANTABILITY, ARE HEREBY DISCLAIMED. MANUFACTURER SHALL NOT BE

LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES,

ARISING FROM ANY CAUSE OR THEORY. Since some states or countries do not allow the exclusion

or limitation of an implied warranty or of incidental or consequential damages, this limitation of

liability may not apply to you.

Repair

All test tools returned for warranty or non-warranty repair or for calibration should be accompanied

by the following: your name, company’s name, address, telephone number, and proof of purchase.

Additionally, please include a brief description of the problem or the service requested and include

the test leads with the meter. Non-warranty repair or replacement charges should be remitted in the

form of a check, a money order, credit card with expiration date, or a purchase order made payable

to AmprobeTest Tools.

In-Warranty Repairs and Replacement – All Countries

Please read the warranty statement and check your battery before requesting repair. During the

warranty period any defective test tool can be returned to your AmprobeTest Tools distributor for

an exchange for the same or like product. Please check the “Where to Buy” section on

www.amprobe.com for a list of distributors near you. Additionally, in the United States and Canada

In-Warranty repair and replacement units can also be sent to a AmprobeTest Tools Service Center

(see below for address).

Non-Warranty Repairs and Replacement – US and Canada

Non-warranty repairs in the United States and Canada should be sent to a AmprobeTest Tools

Service Center. Call AmprobeTest Tools or inquire at your point of purchase for current repair and

replacement rates.

InUSA InCanada

AmprobeTest Tools AmprobeTest Tools

Everett, WA 98203 Mississauga, ON L4Z 1X9

Tel: 888-993-5853 Tel: 905-890-7600

Fax: 425-446-6390 Fax: 905-890-6866

Non-Warranty Repairs and Replacement – Europe

European non-warranty units can be replaced by your AmprobeTest Tools distributor for a nominal

charge. Please check the “Where to Buy” section on www.amprobe.com for a list of distributors near

you.

European Correspondence Address*

AmprobeTest Tools Europe

P.O. Box 1186

5602 BD Eindhoven

The Netherlands

*(Correspondence only – no repair or replacement available from this address. European customers

please contact your distributor).

Specifications

General Specifications

Display and Update Rate: 3-3/4 digits 4000 counts; Updates 3 per second

nominal

Operating Temperature: 0 °C - 40 °C

Relative Humidity: Maximum 80% R.H. up to 31 °C, decreasing linearly to

50% R.H. at 40 °C

Altitude: Operating below 2000 m

Storage Temperature: -20 °C ~ 60 °C, < 80% R.H. (with battery removed)

Temperature Coefficient: Nominal 0.15 x (specified accuracy)/ °C @

(0°C ~ 18 °C or 28 °C ~ 40 °C), or otherwise specified

Sensing: Average sensing

Overload Protection: 600 V dc and V ac rms

Low Battery: Below approx. 2.4 V

Power Supply: 3 V standard button battery x 1

(IEC-CR2032; ANSI-NEDA-5004LC)

Power Consumption (typical): 2 mA

APO Consumption (typical): 2.2 µA

APO Timing: Idle for 30 minutes

Dimension / Weight

L 113 mm x W 53 mm x H 10.2 mm / Approx. 78 gm

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