Amprobe CR50A Manuel utilisateur

CR50A

Capacitance,

Resistance Meter

User Manual

ENG FRE

SPA

Cx Rx

DISCHARGE CAPACITOR

BEFORE CONNECTING

CR50A

Capacitance,

Resistance Meter

User Manual

6/2018, 6010985 B

English

Limited Warranty and Limitation of Liability

Your Amprobe product will be free from defects in material and

workmanship for one year from the date of purchase unless

local laws require otherwise. 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 the behalf of Amprobe. To

obtain service during the warranty period, return the product

with proof of purchase to an authorized Amprobe Service

Center or to an Amprobe dealer or distributor. See Repair

Section for details. THIS WARRANTY IS YOUR ONLY REMEDY.

ALL OTHER WARRANTIES - WHETHER EXPRESS, IMPLIED OR

STATUTORY - 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 Amprobe 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.

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

distributor for an exchange for the same or like product. Please

check the “Where to Buy” section on 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 an Amprobe Service Center (see address below).

Non-warranty Repairs and Replacement

– United States and Canada

Non-warranty repairs in the United States and Canada

should be sent to an Amprobe Service Center. Call

Amprobe or inquire at your point of purchase for current

repair and replacement rates.

USA: Canada:

Amprobe Amprobe

Everett, WA 98203 Mississauga, ON L4Z 1X9

Tel: 877-AMPROBE (267-7623) Tel: 905-890-7600

Non-Warranty Repairs and Replacement – Europe

European non-warranty units can be replaced by your Beha-

Amprobe distributor for a nominal charge. Please check the

“Where to Buy” section on beha-amprobe.com for a list of

distributors near you.

Beha-Amprobe

Division and reg. trademark of Fluke Corp. (USA)

Germany* United Kingdom

In den Engematten 14 52 Hurricane Way

79286 Glottertal Norwich, Norfolk

Germany NR6 6JB United Kingdom

Phone: +49 (0) 7684 8009 - 0 Phone: +44 (0) 1603 25 6662

beha-amprobe.de beha-amprobe.com

The Netherlands - Headquarters**

Science Park Eindhoven 5110

5692 EC Son

The Netherlands

Phone: +31 (0) 40 267 51 00

beha-amprobe.com

*(Correspondence only – no repair or replacement

available from this address. European customers please

contact your distributor.)

**single contact address in EEA Fluke Europe BV

CR50A Capacitance, Resistance Meter

Cx

200

n

20m

200p

200

ZERO

ADJUST

(20 )

OFF

20

2k

2M

20M

CR50

F

20

k

200

k

2m

200

20

2

20n

2n

CAP.

ZERO

ADJUST

Rx

DISCHARGE CAPACITOR

BEFORE CONNECTING

nF

pF

F

MF

3

2

1

4 6

5

1

3½ digit LCD; decimal point,

function and unit indicators

2

Capacitance Zero Adjustment

3

Function/Range/Off Selector

4

Capacitance Input Terminals

5

Resistance Zero Adjustment

6

Input Terminals for resistance,

diode test and continuity

1

CR50A Capacitance, Resistance Meter

Contents

SYMBOLS ....................................................................2

WARNINGS AND PRECAUTIONS............ ....................2

OVERLOAD INDICATION ............................................3

PREPARATION FOR USE - UNPACKING .......................3

MEASURING PROCEDURES ........................................3

Resistance Measurement ...........................................4

Diode and Transistor Test ...........................................5

Continuity Test............................................................6

Capacitance Measurement ........................................6

SAFETY TEST LEADS ...................................................7

SPECIFICATIONS ..........................................................8

ELECTRICAL SPECIFICATIONS .....................................10

TROUBLESHOOTING/MAINTENANCE ........................12

2

SYMBOLS



Battery



Refer to the manual



Double insulated



Audible tone



Fuse



Complies with EU directives

Conforms to relevant Australian

standards

WARNINGS AND PRECAUTIONS

• Do not exceed the maximum overload limits

per function (see specifications) nor the limits

marked on the instrument itself.

• Inspect instrument, 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

probe tips.

• Never replace a fuse with one of a different

rating. Do not operate instrument in an

explosive atmosphere.

3

OVERLOAD INDICATION

Range overload is indicated by “1” in

the display with all other digits blanked.

Select the next higher range until a value is

displayed. If overload condition still exists in the

highest range, the measured value is beyond the

range of the meter. Overload indication is normal

in the OHMS range when the leads are not

connected to anything or when the measured

value is higher than the selected resistance range.

PREPARATION FOR USE - UNPACKING

Your package should include:

1 CR50A

1 Test lead set (one black, one red)

1 Pair of alligator clips

1 9V battery (installed)

1 Spare 0.1A/250V fuse (inside the case)

1 Holster

1 Warranty Card

1 User manual

If any item is damaged or missing, return to the

place of purchase for an exchange.

MEASURING PROCEDURES

General: When connecting or disconnecting test leads

to/from a circuit, always first turn off power to device

or circuit being tested and discharge all capacitors.

4

Resistance Measurement

1. Turn off power to the resistance to be

measured and discharge any capacitors.

Any voltage present during a resistance

measurement will cause inaccurate readings.

Connect red test lead to +Rx Input (red) and

black test lead to -Rx Input.

2. Set Function/Range Switch to the desired

Ω position.

3. Connect test leads to resistance or circuit to

be measured.

4. Read resistance value on Digital Display.

Open circuits will be displayed as an

overload condition.

Note: On the 20Ω range, an adjustment

potentiometer (ZERO ADJ.) allows you to zero

out the test lead resistance. Short the test leads

and adjust the knob until the display reads zero.

Cx

200

n

20m

200p

200

ZERO

ADJUST

(20 )

OFF

20

2k

2M

20M

CR50

F

20

k

200

k

2m

200

20

2

20n

2n

CAP.

ZERO

ADJUST

Rx

DISCHARGE CAPACITOR

BEFORE CONNECTING

1.520 k

4

3

2

1

5

Diode and Transistor Test

1. Connect the red test lead to the +Rx Input

(red) and the black test lead to the –Rx Input.

2. Set the Function/range switch to

d

position.

3. Apply probe tip of red lead to the anode and

black lead to the cathode of the diode. The

meter’s display indicates the forward voltage

drop (approximately 0.7V for silicon diode or

0.4V for germanium diode). Meter will display

overload condition for an open diode.

4. Reverse test lead connections to the diode to

perform a reverse bias test. Overload indicates

a good diode.

Note: Overload condition for both reverse and

forward bias tests indicate an open diode. A

low voltage reading for both bias tests indicates

a shorted diode. If the diode is shunted by a

resistor of 1000 ohms or less, it must be removed

from the circuit before taking the measurement.

Bipolar transistor junctions may be tested in the

same manner described above.

Cx

200

n

20m

200p

200

ZERO

ADJUST

(20 )

OFF

20

2k

2M

20M

CR50

F

20

k

200

k

2m

200

20

2

20n

2n

CAP.

ZERO

ADJUST

Rx

DISCHARGE CAPACITOR

BEFORE CONNECTING

Cathode Anode

Cathode

600 - 900 mV

<1 V

Anode

4

3

2

1

OK

6

Continuity Test

The Continuity test checks electrical continuity

between two contact points.

1. Set the Function/Range switch to

d



.

2. Plug the black test lead into the –Rx jack

(black) and connect the test lead tip to one of

the contact points

3. Plug the red test lead into the +Rx jack (red)

and connect its test lead point to the other

contact point. (See Figure 1 for connections)

4. The internal beeper emits a tone when

resistance is less than approx. 40Ω

Capacitance Measurement

Discharge all voltage from the capacitor (via a

100kΩ resistor) before measuring its value

1. Connect the red test lead to the Cx+ input

and the black test lead to the Cx– input.

2. Set the function/range switch to the

capacitance range that gives the best

resolution.

3. Apply probe tips to the capacitor leads.

When measuring electrolytic capacitors,

observe correct polarity.

4. Read the capacitance value on the display

(you may have to wait a few seconds until

the capacitor is fully charged). If “OL”

appears in the highest range, the capacitor

is too large to be measured.

Note: For small value measurements utilize

7

CAP Zero Adjust to eliminate test lead

capacitance (±20pF).

Note: Small value capacitors can also be

measured by inserting their leads directly into

the slots in the meter.

Cx

200

n

20m

200p

200

ZERO

ADJUST

(20 )

OFF

20

2k

2M

20M

CR50

F

20

k

200

k

2m

200

20

2

20n

2n

CAP.

ZERO

ADJUST

Rx

DISCHARGE CAPACITOR

BEFORE CONNECTING

F

1

3

2

4

SAFETY TEST LEADS

The test leads included with your meter have

shrouded banana plugs to eliminate the

possibility of shock if the plugs accidentally pull

out of the meter while making a measurement.

Always inspect the test leads for damage before

making any measurements.

8

SPECIFICATIONS

Display

3 ½ digit LCD, 1999 counts

Zero Adjustment

Adjustment

potentiometer

Overrange

Indication

“1” is displayed

Low Battery

Indication

is displayed when

the battery voltage

drops below accurate

operating level. Change

battery when low

battery is indicated.

Display Update

Rate

2/sec, nominal

Operating

Temperature

0°C to 50°C, 0 to 70%

Relative Humidity

Storage

Temperature

-20°C to 60°C, 0 to 80%

RH, battery removed

Power

Standard 9V transistor

battery, NEDA 1604, JIS

006P, IEC 6F22

Battery Life

(Typical)

200 hours alkaline, 150

hours carbon-zinc

Dimensions

(H x W x D)

6.1 x 2.8 x 1.3 in,

(15.1 x 7.0 x 3.8 cm)

9

Weight

(including battery)

8 ounces (200 grams)

Accessories

One pair of test leads,

two alligator clips,

one spare fuse (FP125)

installed in battery

compartment, battery,

holster and Operator’s

Manual.

Agency

Approvals

EMC

This product complies with requirements of

the following European Community Directives:

2014/30/EEC (Electromagnetic Compatibility) as

amended by 93/68/EEC (CE Marking).

However, electrical noise or intense

electromagnetic fields in the vicinity of the

equipment may disturb the measurement

circuit. Measuring instruments will also respond

to unwanted signals that may be present within

the measurement circuit. Users should exercise

care and take appropriate precautions to avoid

misleading results when making measurements

in the presence of electronic interference.

10

ELECTRICAL SPECIFICATIONS

(Accuracies at 23°C ± 5°C, <75% RH.)

RESISTANCE

Ranges 20Ω, 200Ω, 2k-2MΩ, 20MΩ

Accuracy

±1.2% rdg.

±(0.5% rdg +3 dgt)

±(0.5%rdg + 1dgt)

±(3.0% rdg + 1dgt)

Resolution 0.01 in 20Ω rg.

OL Protection,

all Ranges

500VDC or AC RMS

Open Circuit

Voltage

0.3VDC; 3.0VDC on 20Ω

and 200Ω ranges

CAPACITANCE

Ranges

200pF, 2000pF to 2μF, 20μF,

200μF, 2mF, 20mF

Accuracy

±(0.5% rdg +1 dgt +0.5pF)

±(0.5% rdg +1 dgt)

±(1% rdg +1 dgt)

±(1.5% rdg +1 dgt)

Test Frequency

820Hz, 820Hz, 82Hz, 8.2Hz,

8.2Hz, 8.2Hz

11

Test Voltage < 3.5V

Input

Protection

0.1A/250V Fast Acting Fuse

DIODE TEST

Test Current/

Voltage

1mA (approx.) / 3.2VDC

Display Forward Junction Voltage

CONTINUITY INDICATOR

Audible

Indication

ON ≤ 40 Ω; OFF > 75 Ω

OL Protection 500VDC or AC

OPTIONAL ACCESSORIES

VC30A

Vinyl Carrying Case

(for meter and holster)

DL243D Deluxe Test Lead Set

TL36A

Replacement Safety Test

Leads w/alligator clips

12

TROUBLESHOOTING/MAINTENANCE

If there appears to be a malfunction during

the operation of the meter, the following steps

should be performed in order to isolate the

cause of the problem:

1. Check the battery.

2. Review the operating instructions for

possible mistakes in operating procedure.

3. Inspect and test the Test Probes for a

broken or intermittent connection.

4. Inspect and test the fuse. See Fuse

Replacement.

Except for the replacement of the battery or fuse,

repair of the multimeter should be performed

only by a Factory Authorized Service Center or by

other qualified instrument service personnel.

The front panel and case can be cleaned with

a mild solution of detergent and water. Apply

sparingly with a soft cloth and allow to dry

completely before using. Do not use aromatic

hydrocarbons or chlorinated solvents for cleaning.

Battery/Fuse Replacement

 WARNING

To prevent electrical shock hazard, turn off

the multimeter and any device or circuit under

test and disconnect the test leads before

removing the rear cover.

13

1. Remove the screws and lift off the rear case.

2. Fuse Replacement: Remove the blown fuse

(5 x 20mm) from the fuse holder. Replace

with a 0.1A/250V quick acting glass fuse

(one spare fuse is located on the right side

of the battery compartment). Amprobe

replacement fuse part number is FP 125.

3. Battery replacement: Remove battery and

replace with NEDA type 1604 or equivalent

9-volt alkaline battery.

4. Reassemble the instrument.

 WARNING

Use of an incorrect fuse could result in serious

injury or even death. Failure to turn off the

multimeter before installing the battery could

result in damage to instrument and battery.

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Amprobe CR50A Manuel utilisateur

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