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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Model 72-8155: OPERATING MANUAL
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To avoid electric shock or personal injury, read the
“Safety Information” and “Rules for Safety Operation”
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 “the Meter”) 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.

To avoid possible electric shock or personal injury,
and to avoid possible damage to the Meter or to the
equipment under test, adhere to the following rules:
Warning
Before using the Meter inspect the case. Do not use
the Meter if it is damaged or the case (or part of the
case) is removed. Look for cracks or missing plastic.
Pay attention to the insulation around the connectors.
Inspect the test clips for damaged insulation or
exposed metal. Check the test clips for continuity.
Replace damaged test clips with identical model
number or electrical specifications before using the
Meter.
Do not apply voltage to the Meter.
The rotary switch should be placed in the correct
position and no change of range made during
measurement , to prevent damage to the Meter.
Use the proper terminals, function, and range for
your measurements.
Do not use or store the Meter in an environment of
high temperature, humidity, explosive, inflammable
and strong magnetic field. The performance of the
Meter may deteriorate after dampened.
Disconnect circuit power and discharge all high-
voltage capacitors before testing resistance,
continuity, capacitance or diodes.
Replace the battery as soon as the battery indicator
appears. With a low battery, the Meter might
produce false readings that can lead to electric shock
and personal injury.
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Rules For Safe Operation
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Remove test clips from the Meter and turn the Meter
power off before opening the Meter case.
When servicing the Meter, use only the same model
number or identical electrical specifications
replacement parts.
The internal circuit of the Meter shall not be altered
at will to avoid damage of the Meter and any accident.
Soft cloth and mild detergent should be used to
clean the surface of the Meter when servicing. No
abrasive and solvent should be used to prevent the
surface of the Meter from corrosion, damage and
accident.
Remove the battery when not used for a prolonged
period to avoid damage to the Meter.
Periodically check the battery as it may leak after
some time. If leakage is apparent, the battery should
be immediately replaced to prevent damage to the
Meter.
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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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The Meter Structure (see figure 1)
1. LCD Display
2. L-C switch
3. Transistor Jack
4. Resistance, Diode and Continuity Input Terminal
5. Capacitance and Inductance Input Terminal
6. Rotary Switch
7. Power.
(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)
Data hold is active.
The battery is low.
Warning: To avoid false readings,
which could lead to possible electric shock
or personal injury, replace the battery as
soon as the battery indicator appears.
Transistor Test
Diode test
The continuity buzzer is on.
Farad. The unit of capacitance
pF: Picofarad. 1 x 10-12 or 0.000000000001
farads.
nF: Nanofarad. 1 x 10-9 or 0.000000001
farads.
µF: Microfarad.1 x 10-6 or 0.000001 farads.
mF: Millifarad. 1 x 10-3 or 0.001 farads.
: Ohm. The unit of resistance
k: kilohm. 1 x 103or 1000 ohms
M: Megaohm. 1 x 106or 1,000,000 ohms
H: Henry. The unit of Inductance.
mH: Millihenry. 1 x 10-3 or 0.001 henry.
No. Symbol Meaning
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pF
nF
µF
mF
k
M
H
mH