Amprobe LCR55A Manuel utilisateur

User Manual

• Bedienungshandbuch

• Manualdeuso

• Moded’emploi

LCR55A

Inductance, Capacitance,

Resistance Meter

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200 2m

FUSED

200mA MAX

HOLD

HmHH

MAX

EBCE

nF FmF

k M

20 ADJ.

20m

200m

200

NPN

PNP

200p

20n

200n

200

2000

20M

200k

20k

2k 200 20 OFF

hFE

(Icec A)

Hi(+) Lo(-)

MAX 350V

FUSED

DISCHARGE CAPACITOR

BEFORE CONNECTING

Lx Cx

LCR55A

M.W.

LCR55A

3-1/2 digit LCD; decimal point, function and unit indicators

3-1/2 Digit LCD ; Dezimalpunkt, Funktions- und Einheitsanzeigen

LCD de 3-1/2 dígitos, punto decimal, indicadores de función y unidades

LCD 3-1/2 digits ; point décimal, indicateurs de fonctions et d'unités

Low Battery

Batterie entladen

Pila baja

Pile déchargée

Zero adjustment for

20Ω range

Nullabgleich für

20Ω Bereich

Ajuste de cero para

escala de 20 Ω

Mise-à-zéro pour

calibre 20Ω

Display Hold

Anzeigesperre

Retención de

lectura

Maintien de

lecture

Max Reading Hold

Max Anzeigesperre

Retención de

lectura maxima

Maintien de lecture

maximale

Positive and negative inputs for resistance

and diode test

Positive und negative Eingänge für

Widerstandsmessung und Diodentest

Entradas positiva y negativa para medidas

de resistencia y prueba de diodos

Entrées positives et négatives pour measures

de résistance et test de diodes

Function/Range/Off

Selector

Funktion-/Bereich-

/Aus Schalter

Selector de

Función/Escala/Off

Sélecteur fonctions/

calibres/marche-

arrêt

Input terminals

for transistor test

Eingänge für

Transistortest

Terminales de

entrada para prueba

de transistors

Entrées pour test

de transistors

High (+) and Low (-) inputs for capacitance

and inductance measurement

Hoch (+) und Niedrig (-) Eingänge für

Kapazitäts- und Induktanzmessung

Entradas alta (+) y baja (-) para medidas de

capacidad e inductancia

Entrées haute (+) et basse (-) pour measures

de capacité et d'inductance

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LCR55A

Inductance, Capacitance,

Resistance Meter

Operators Manual

• Bedienungsanleitung

• Manual de Instrucciones

• Manuel d’Utilisation

English

PN 1566247

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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 above 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.

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Inductance, Capacitance, Resistance Meter

Contents

Symbols .............................................................................................................. 1

Warnings and Precautions................................................................................1

Overload Indication .......................................................................................... 2

Preparation for Use – Unpacking..................................................................... 2

Measuring Procedures ...................................................................................... 2

Speciﬁcations..................................................................................................... 4

Troubleshooting/Maintenance ......................................................................... 6

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

Symbols

Warnings and Precautions

• Do not exceed the maximum overload limits per function (see speciﬁcations)

nor the limits marked on the instrument itself.

• Exercise extreme caution when: measuring voltage >20V .

• Inspect 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 probe tips.

• Do not operate instrument in an explosive atmosphere.

• Clean instrument with mild detergent only.

Battery Refer to the manual

Double insulated Audible tone

Fuse  Complies with EU

directives

Conforms to relevant Australian standards

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OverloadIndication

Range overload is indicated by a “OL” in the display with all

other digits blanked. Overload indication is normal in the

OHMS range with open circuit or too high a resistance.

PreparationforUse–Unpacking

Your shipping carton should include the LCR55A, one test lead set (one black,

one red), one pair of alligator clips, one 9V battery (installed), one spare

0.1A/250V fuse (inside the case), one holster, a warranty card and this manual. If

any item is damaged or missing, return to the place of purchase for an exchange.

MeasuringProcedures

General Procedures

1. 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.

2. If the magnitude of a signal to be measured is not known, set selector switch

to highest range ﬁrst and reduce until satisfactory reading is obtained.

3. Strictly observe the max input limits.

Resistance Measurement (Fig. -1-)

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.

2. Connect red test lead to +Rx Input and black test lead to -Rx Input.

3. Set Function/Range Switch to the desired Ωposition.

4. Connect test leads to resistance or circuit to be measured.

5. Read resistance value on Digital Display. Open circuits will be displayed as an

overload condition.

Note: On the 20Ωrange, an adjustment potentiometer (ZERO ADJ.) allows you

to zero out the test lead resistance. Short test leads and adjust the knob until the

display reads zero.

Diode and Transister Test (Fig. -2-)

The diode test measures the voltage drop across the diode junction.

4. Connect the red test lead to the +Rx Input and the black test lead to the –Rx Input.

5. Set the Function/range switch to or to M.W. position (to test diodes

found in microwave ovens).

6. 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.

7. 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

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be tested in the same manner described above.

Note: The test procedure of microwave oven diodes is identical to regular diodes

except forward voltage drop will be higher (3 or more volts) than standard

silicon diodes. LEDs may also be tested with the LCR55A in the M.W. position.

Continuity Test

The Continuity test checks electrical continuity between two contact points.

1. Set the Function/Range switch to .

2. Plug the black test lead into the –Rx jack and connect the test lead tip to one

of the contact points.

3. Plug the red test lead into the +Rx jack 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. 30Ω.

Capacitance Mesurements (Fig. -3-)

1. Discharge all voltage from the capacitor (via a 20kΩresistor) before

measuring its value.

2. Connect the red test lead to the HI(+) input and the black test lead to the

Lo(–) input.

3. Set the function/range switch to the capacitance range that gives the best

resolution.

4. Apply probe tips to the capacitor leads

5. 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: Small value capacitors can also be measured by inserting their leads

directly into the Cx/Lx slots in the meter.

Note:The capacitance range is protected by a 0.1A/250V fast blow fuse. If fuse

blows, replace with same (see Battery and Fuse Replacement).

Note: The LCR55A has a residual capacitance of approximately 6pF in the 200nF

range. When using the 200nF range, note the residual capacitance and subtract

this value from the measured value.

Inductance Measurement

1. Connect the red test lead to the HI(+) input and the black test lead to the

Lo(–) input.

2. Set the function/range switch to the inductance range that gives the best

resolution.

3. Apply probe tips to the inductor leads.

4. Read the inductance value on the display. If “OL” appears in the highest

range, the inductor is too large to be measured.

Note: Small value inductors can also be measured by inserting their leads directly

into the Cx/Lx slots in the meter.

Note: The inductance range is protected by a 0.1A/250V fast blow ceramic fuse. If

fuse blows, replace with same (see Battery and Fuse Replacement).

Transistor Gain Measurement

The Transistor must be out of circuit.

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1. Set the Function/Range switch to the PNP(hFE) or NPN(hFE) position,

according to the type of transistor to be measured.

2. Plug the emitter, base and collector leads of the transistor into the correct

holes of test socket.

3. Read the hFE beta, (DC current gain) in the display.

Note: To measure the collector-emitter current, set the function/range switch to

the corresponding PNP(Icec µA) or NPN(Icec µA) position.

MAX Function

Push the MAX button to keep only the highest reading on the display. The

display is updated each time a higher value is encountered. Push MAX again to

release the display and to display current values.

Hold Function

Press the HOLD button to maintain a reading on the display. The reading is

maintained even when the probe tips are removed from the meter. Pushing the

HOLD button again releases the display.

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.

Specications

General Speciﬁcations

Display: 3 1/2 digit LCD, 1999 counts, 0.7” (17.8mm) high numerals, unit

annunciators and function symbols

Polarity Indication: Automatic, positive implied, negative indicated

Zero Adjustment: Automatic

Overrange Indication: “OL”

Low Battery Indication: is displayed when the battery voltage drops below

accurate operating level. Change battery immediately.

Display Update Rate: 2.5 per second, nominal

Operating Temperature: 0°C to 50°C, 0 to 70% Relative Humidity

Storage Temperature: -20°C to 60°C, 0 to 80% RH with battery removed

Temperature coefﬁcient: 0.1 x (spec. accur.) per °C (0-18°C, 28-50°C)

Power: Standard 9-volt transistor battery, NEDA 1604, JIS 006P, IEC 6F22

Auto Power Off: 60 minutes after no function or range change

Battery Life (Typical): 30 hours alkaline (changes with function and application)

Dimensions (H x W x D): 18.3 x 7.9 x 3.8 cm, (7.2 x 3.1 x 1.5 inches)

Weight (including battery): 311 grams (11 ounces)

Accessories: Test leads, 0.1A/250V spare fuse, battery, one pair of alligator clips

and Operator’s Manual.

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Agency Approvals: EMC

This product complies with requirements of the following European

Community Directives: 89/336/EEC (Electromagnetic Compatibility) and 73/23/

EEC (Low Voltage) 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

Electrical Speciﬁcations

Accuracies at 23°C ± 5°C, <75% RH.

Resistance

Ranges: 20, 200Ω, 2, 20, 200kΩ, 2, 20MΩ

Resolution, 20Ωrange: 10mΩ

Accuracy: 20Ωrange: ±1.2% rdg (zero adjust)

200Ωrange: ±0.5% rdg +3dgt

2k to 2MΩrgs: ±(0.5% rdg +1dgt)

20MΩrg: ±(2.0% rdg +2dgt)

OL Protection, all ranges: 350VDC or AC RMS

Open Circuit Voltage; 20Ωrange: 6.5VDC; 200Ωrange: 3.0VDC; other ranges:

1.2VDC

Continuity

Audible Indication, 2kΩrg: at R ≤30Ω

Response time: 800ms approx

OL Protection: 350VDC or AC RMS

Diode Test

Test Current: 1mA (approx.)

Test Voltage: 3.0VDC typical

Accuracy: ±(1.5%rdg +1dgt)

Display: Forward Junction Voltage

OL Protection: 350VDC or AC RMS

Micro Wave Diode Test

Test Current: 1.3mA (approx.)

Test Voltage: 8.0VDC typical

Accuracy: ±(3.0%rdg +1dgt)

Display: Forward Junction Voltage

OL Protection: 350VDC or AC RMS

Capacitance

Ranges: 200pF, 2, 20, 200nF, 2, 20, 200, 2000µF

Accuracy*:200pF to 200nF: ±(1.0% rdg +3dgt)

2µF to 200µF rgs: ±(2.0% rdg +3dgt)

2000µF range: ≤1000µF ±(3.0% rdg +3dgt)

>1000µF ±(5.0% rdg +5dgt)

Note: In lower ranges, substract 6 points residual offset reading from result

Test Frequency: 200p to 2µF: 1000Hz; 20, 200µF ranges: 100Hz; 2000µF range:

10Hz

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Temperature Coefﬁcient: ≤0.5µF: 0.1%/°C; >0.5µF: 0.2%/°C

OL Protection: 0.1A/250V fast blow fuse.

Inductance

Ranges: 200µH, 2, 20, 200mH, 2, 20, 200H

Accuracy: 200µH rg: ±(5.0%rdg +30dgt)*

2 to 200mH: ±(3.0% +20dgt)*

2 to 200H: ±(5.0% +20dgt)*

*For values of Q ≤7

Test Frequency: 200µH to 2H rgs: 1000Hz; 20 and 200H ranges: 100Hz

Temperature Coefﬁcient, ≤0.5H: 0.2%/°C; >0.5H: 0.5%/°C

OL Protection: 0.1A/250V fast blow fuse

Transistor Test

hFE Range: 0-1000

hFE Base Current: 5µA approx.

hFE Voltage C-E: 3.0VDC approx.

Iceo Range, Leakage Current: 10nA to 20µA

Optional Accessories

VC221B Vinyl Carrying Case (for meter and holster)

DL243D Standard Test Lead Set

DL248D Deluxe Test Lead Set

TL36A Replacement Test Leads with Alligator Clips

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:

Check the battery.

Review the operating instructions for possible mistakes in operating procedure.

Inspect and test the Test Probes for a broken or intermittent connection.

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.

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.

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 9volt alkaline battery.

4. Reassemble the instrument.

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