Tenma 72-8150 User manual
1
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. Capacitance Measurement
C. Diode and Continuity Test
D. Transistor hFE Measurement
General Specifications
Accuracy Specifications
A. Resistance Test
B. Capacitance Test
C. Continuity & Diodes
D. Transistor
Maintenance
A. General Service
B. Replacing the Battery
C. Replacing the Fuse
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4
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Model 72-8150: OPERATING MANUAL
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Model 72-8150: OPERATING MANUAL
To avoid electric shock or personal injury, read the
“Safety Information” and “Rules for Safety Operation”
carefully before using the Meter.
Warning
3
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 Capacitance Meter Model 72-8150 (hereafter
referred to as “the Meter”) is a 3 1/2 digits with steady
operations, fashionable design and highly reliable hand-
held measuring instrument. It will measure resistance,
transistor hFE and test diodes. It will also test continuity
with an audible buzzer.
The Meter has a broad capacitance measurement range
and precise accuracy. It can be used in measuring the
circuit designed capacitance of cable, switch and PCB
layout.
Model 72-8150: OPERATING MANUAL
4
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
English Operating Manual
Test Clip
9V 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.
Model 72-8150: OPERATING MANUAL
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 on.
International electrical symbols used on the Meter and in
this Operating Manual are explained on page 8.
5
Model 72-8150: OPERATING MANUAL
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.
Remove test clips from the Meter and turn the Meter
power off before opening the Meter case.
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Rules For Safe Operation
6
Model 72-8150: OPERATING MANUAL
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.
The Meter is suitable for indoor use.
Turn the Meter power off when it is not in use and
take out the battery when not using for a long time.
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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Model 72-8150: OPERATING MANUAL
8
International Electrical Symbols
Ground
Double Insulated
Low Battery.
Continuity Test.
Diode.
Capacitance Test
Fuse.
Warning. Refer to the Operating Manual.
Conforms to Standards of European Union.
Model 72-8150: OPERATING MANUAL
9
The Meter Structure (see figure 1)
Functional Buttons
1. LCD Display
2. Capacitance Zero Adjustment Switch
3. Transistor Jack
4. Resistance, Diode and Continuity Buzzer Input Terminal
5. Capacitance Input Terminal
6. Small Value Capacitance Jack
7. Rotary Switch .
8. Power Button
(figure 1)
Below table indicated for information about the functional
button operations.
Button Description
Press the Power down to turn the Meter on. Press
the Power again to turn the Meter power off.
Power
1
2
3
6
7
8
54
Model 72-8150: OPERATING MANUAL
β
10
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. 1x10-12 or 0.000000000001
farads.
nF:Nanofarad. 1x10-9 or 0.000000001 farads.
µF: Microfarad.1x10-6 or 0.000001 farads.
mF: Millifarad. 1x10-3 or 0.001 farads.
: Ohm. The unit of resistance
k: kilohm. 1x103or 1000 ohms
M: Megaohm. 1x106or 1,000,000 ohms
H: Henry. The unit of Inductance.
mH: Millihenry. 1x10-3 or 0.001 henry.
No. Symbol Meaning
1
2
3
4
5
6
7
8
pF, nF,
F, mF
, k ,
M
H, mH
mF
µF
nF
pF
mH
ΩH
kΩMΩ
3
1
2
5
4
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Model 72-8150: OPERATING MANUAL
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