model 72-8155: operating manual - farnell · pdf filemodel 72-8155: operating manual 4...

Model 72-8155: OPERATING MANUAL
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Table of ContentsTitle PageOverviewInspectionSafety InformationRules For Safe OperationInternational Electrical SymbolsThe Meter StructureFunctional ButtonsDisplay SymbolsMeasurement Operation A. Measuring Resistance B. Diode and Continuity Test C. Capacitance Measurement D. Inductance Measurement E. Transistor hFE MeasurementGeneral SpecificationsAccuracy Specifications A. Resistance Test B. Continuity & Diodes C. Capacitance Test D. Inductance Test E. TransistorMaintenance A. General Service B. Replacing the Battery C. Replacing the Fuse
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To avoid electric shock or personal injury, read theSafety Information and Rules for Safety Operationcarefully before using the Meter.
Warning
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OverviewThis Operating Manual covers information on safety andcautions. Please read the relevant information carefullyand observe all the Warnings and Notes strictly.
Digital Inductance Capacitance Meter Model 72-8155(hereafter referred to as the Meter) is a 3 1/2 digits withsteady operations, fashionable design and highly reliablehand-held measuring instrument.
The Model 72-8155 will measure capacitance, inductance,resistance, transistor hFE and test diodes. It will also testcontinuity with an audible buzzer.

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InspectionOpen the package case and take out the Meter. Checkthe following items carefully to see if any items are missingor damaged.
Item Description Qty1
2
3
Operating Manual
Test Clip
9V Alkaline Battery (NEDA1604, 6F22
or 006P) (installed)
1 piece
1 pair
1 piece
In the event you find any items missing or damaged, pleasecontact your dealer immediately.
Safety InformationThis Meter complies with the standards EMC EN61326.Use the Meter only as specified in this operating manual,otherwise the protection provided by the Meter may beimpaired.
In this manual, a Warning identifies conditions and actionsthat pose hazards to the user, and may damage the Meteror the equipment under test.
A Note identifies the information that user should payattention to.
International electrical symbols used on the Meter and inthis Operating Manual are explained on page 7.

Warning
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Rules For Safe Operation
5

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International Electrical Symbols
Ground
Double Insulated
Low Battery.
Continuity Test.
Diode.
Capacitance Test
Inductance Test
Fuse.
Warning. Refer to the Operating Manual.
Conforms to Standards of European Union.

72-8155
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The Meter Structure (see figure 1)
(figure 1)

Power
L-C
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Functional ButtonsThe following table provides information regarding thefunctional button operation.
Button Description
Press the Power down to turn the Meter on.
Press the Power again to turn the Meter power off.
Press L-C down to enter the Capacitance
measurement mode.
Press L-C up to enter the Inductance measurement
mode.

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Display Symbols (see figure 2)
(figure 2)
No. Symbol Meaning
1
2
3
4

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1.
2.3.
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Measurement Operation
A. Measuring Resistance (see figure 3)
(figure 3)

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Note

To avoid damage to the Meter or to the devices undertest, disconnect circuit power and discharge all thehigh-voltage capacitors before measuring diodes andcontinuity.
Warning
Testing Diodes
Insert the red test clip into the terminal andthe black test clip into the COM terminal.Set the rotary switch to .For forward voltage drop readings on any semiconductorcomponent, place the red test clip on the componentsanode and place the black test clip on the componentscathode.The display shows the diode forward voltage dropsnearest value.
1.
2.3.
Use the diode test to check diodes, transistors, and othersemiconductor devices. The diode test sends a currentthrough the semiconductor junction, and then measuresthe voltage drop across the junction. A good silicon junctiondrops between 500mV and 800mV.
To test a diode out of a circuit, connect the Meter as follows:
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(figure 4)

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1.
2.3.
4.
5.
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Note
Note

1.
2.
3.
4.
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C. Capacitance Measurement (72-8155 only, see figure 5)
(figure 5)

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Note

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D. Inductance Measurement (see figure 6)
(figure 6)
1.2.
3.
4.
Remarks:

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(figure 7)
1.2.3.
4.
Note:

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General Specifications

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Accuracy Specifications
A. Resistance Test
Range Resolution Accuracy
200
2k
20k
200k
2M
20M
0.1
1
10
100
1k
10k
Remarks:
(0.8%+3)
(0.8%+1)
[2%(rdg-12)+5]

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B. Continuity & Diodes
Range ResolutionOverload
ProtectionFunction
Diode
Continuity
1mV
1250V rms
Remarks:
C. Capacitance Test
Range Resolution Accuracy Testing Frequ-ency / Voltage
2.000nF
20.00nF
200.0nF
2.000F
20.00F
200.0F
600F
0.001nF
0.01nF
0.1nF
0.001F
0.01F
0.1F
0.001mF
(1%+5)
(4%+5)
Reference only
1kHz/150mV
100Hz/15mV
100Hz/1.5mV
Remarks:

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The display value is thetested transistors
(NPN, PNP) nearestvalue (0~1000 )
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E. Transistor
Range Resolution Remarks
hFEVce 5.8V
I bo 10A
Testing
Condition
1
D. Inductance Test
Range Resolution Accuracy Tested Frequ-ency / Current
2mH
20mH
200mH
2H
20H
0.001mH
0.01mH
0.1mH
0.001H
0.01H
(2%+8)
(5%+5)
(5%+15)
1kHz/150A
100Hz/15A
Remarks:

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Maintenance

Warning
1.
2.
3.4.
5.
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(figure 8)
To replace the battery:

Warning
To replace the Meters fuse:1.
2.
3.
4.
5.
6.
7.
(figure 9)
SCREW
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model 72-8155: operating manual - farnell · pdf filemodel 72-8155: operating manual 4...

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