Tenma 72-8155 User manual

Model 72-8155: OPERATING MANUAL
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Table of Contents
Title Page
Overview
Inspection
Safety Information
Rules For Safe Operation
International Electrical Symbols
The Meter Structure
Functional Buttons
Display Symbols
Measurement Operation
A. Measuring Resistance
B. Diode and Continuity Test
C. Capacitance Measurement
D. Inductance Measurement
E. Transistor hFE Measurement
General Specifications
Accuracy Specifications
A. Resistance Test
B. Continuity & Diodes
C. Capacitance Test
D. Inductance Test
E. Transistor
Maintenance
A. General Service
B. Replacing the Battery
C. Replacing the Fuse
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15
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Model 72-8155: OPERATING MANUAL
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To avoid electric shock or personal injury, read the
ìSafety Informationî and ìRules for Safety Operationî
carefully before using the Meter.
Warning
Model 72-8155: OPERATING MANUAL
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Overview
This Operating Manual covers information on safety and
cautions. Please read the relevant information carefully
and observe all the Warnings and Notes strictly.
Digital Inductance Capacitance Meter Model 72-8155
(hereafter referred to as ìthe Meterî) is a 3 1/2 digits with
steady operations, fashionable design and highly reliable
hand-held measuring instrument.
The Model 72-8155 will measure capacitance, inductance,
resistance, transistor hFE and test diodes. It will also test
continuity with an audible buzzer.

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Inspection
Open the package case and take out the Meter. Check
the following items carefully to see if any items are missing
or damaged.
Item Description Qty
1
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, please
contact your dealer immediately.
Safety Information
This 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 be
impaired.
In this manual, a Warning identifies conditions and actions
that pose hazards to the user, and may damage the Meter
or the equipment under test.
A Note identifies the information that user should pay
attention to.
International electrical symbols used on the Meter and in
this Operating Manual are explained on page 7.

Warning
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Rules For Safe Operation
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Lx
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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.

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

Power
L-C
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Functional Buttons
The following table provides information regarding the
functional 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 under
test, disconnect circuit power and discharge all the
high-voltage capacitors before measuring diodes and
continuity.
Warning
Testing Diodes
Insert the red test clip into the terminal and
the black test clip into the COM terminal.
Set the rotary switch to .
For forward voltage drop readings on any semiconductor
component, place the red test clip on the componentís
anode and place the black test clip on the componentís
cathode.
The display shows the diode forward voltage dropís
nearest value.
1.
2.
3.
Use the diode test to check diodes, transistors, and other
semiconductor devices. The diode test sends a current
through the semiconductor junction, and then measures
the voltage drop across the junction.Agood silicon junction
drops 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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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]