Unit UT105 Manuel utilisateur
Table of Contents
Title Page
Overview
Unpacking Inspection
Safety Information
Rules For Safe Operation
Automotive Servicing Safety Guide
International Electrical Symbols
The Meter Structure
Rotary Switch
Functional Buttons
Display Symbols
Measurement Operation
Part 1 Multimeter Basic Testing
A. AC and DC Voltage Testing
B. DC Current Testing
C. Resistance Testing
D. Diode Testing
E. Continuity Testing
F. Dwell Testing
G. Engine Tach (Rotation Speed)
Testing “RPMx10”
H. Data Holding
Part 2 Diagnosis of Automotive Troubles
A. Fuse Testing: Check the fuse to
see if it is blown out.
B. Switch Testing: Check the switch
to see if it can work correctly.
C. Solenoid or Relay Testing
D. Starting/Charging System Testing
E. Battery Power Consumption Testing
when the Engine Is off
F. Trigger Voltage Battery Load Testing
G. Voltage Drop Testing
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Title Page
H. Charging System Voltage Testing
I. Ignition System Testing
1. Ignition Coil Testing
2. Ignition System High Voltage
Damper Testing
3. Hall Switch/Sensor Testing
4. Magnetic Resistance Sensor
5. RPMx10 Testing
6. Fuel System Testing
J. Engine Sensor Testing
1. Oxygen Sensor
2. Temperature Sensor
3. Position Sensor
4. Absolute Pressure (MAP) and
Baro Sensor
5. Mass Air Flow (MAF) Sensor
General Specifications
Accurate Specifications
A. DC Voltage
B. AC Voltage
C. DC Current
D. Resistance
E. Diode
F. Continuity Testing
G. Dwell Testing
H. Tach (Rotation Speed) Testing
Maintenance
A. General Services
B. Replacing the Fuses
C. Replacing the Battery
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Model UT105: 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.
Warning
To avoid electric shock or personal injury, read the
“Safety Information” and “Rules for Safe Operation”
carefully before using the Meter.
In 1999 counts and 3-1/2 digits, the UT105 Meter is a
manual testing automotive digital Multimeter. Spotting
a unique design with an extra large screen, this meter
has useful features such as a fully-functional symbol
display, connect prompt, and full testing overload
protection. For this reason, it emerges as an electric
Meter with more outstanding performance for safer
operation than other Meters. In addition to the automotive
dwell and tach (rotation speed), this Meter can be used
to test theAC voltage, DC voltage, DC current, resistance,
diode and continuity.
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Unpacking Inspection
In the event you find any missing or damage, please
contact your dealer immediately.
9V Battery (NEDA1604, 6F22 or 006P)
Open the package case and take out the Meter. Check
the following items carefully to see any missing or
damaged part:
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Item
1
2
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Description
English Operating Manual
Test Lead
Alligator Clip
Qty
1 piece
1 pair
1 pair
1 piece
Safety Information
This Meter complies with standards IEC61010: in pollution
degree 2, overvoltage category (CAT. II 1000V, CAT. III
600V) and double insulation.
CAT.II: Local level, appliance, PORTABLE EQUIPMENT
etc., with smaller transient overvoltages than CAT. III
CAT.III: Distribution level, fixed installation, with smaller
transient overvoltages than CAT. IV
Use the Meter only as specified in this operating manual,
otherwise the protection provided by the Meter may be
impaired.
International electrical symbols used on the Meter and
in this Operating Manual are explained on page 11.
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Rules For Safe Operation (1)
l 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.
l Inspect the test leads for damaged insulation
or exposed metal. Check the test leads for
continuity. Replace damaged test leads with
identical model number or electrical specifications
before using the Meter.
l When using the test leads, keep your fingers
behind the finger guards.
l Do not apply more than the rated voltage, as
marked on the Meter, between the terminals or
between any terminal and grounding.
l When the Meter working at an effective voltage
over 60V in DC or 30V in AC, special care should
be taken for there is danger of electric shock.
l Use the proper terminals, function, and range
for your measurements.
l The rotary switch should be placed in the right
position and no any changeover of range shall
be made during measurement is conducted to
prevent damage of the Meter.
l Disconnect circuit power and discharge all
high-voltage capacitors before testing current,
resistance, diodes or continuity.
l 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.
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
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Rules For Safe Operation (2)
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l To connect or cut off an electronic component,
close the ignition lock.
l Pay attention to the automotive producer’s cautions,
notes and servicing procedures.
All the information, explanations and detailed
descriptions in the operation manual have originated
from the industrial information recently published.
It is impossible to prove the accuracy and completeness
of the information, of which we shall not be responsible
for the assumption.
A. The data of the automotive servicing manual have
originated from the automotive servicing information.
1. Contact the local distributors of automotive components.
2. Contact the local retailers of automotive components.
3. Contact the local libraries to look up any book for the
proofreading of your automotive servicing manual so as
to provide you with the latest information.
B. Before the diagnosis of any trouble, open the
engine hood to make a thorough visual inspection.
You will find the causes for many of your problems
to be solved, which will save you a lot of time.
1. Has the automobile recently been serviced? Has the
same problem sometimes occurred where the trouble
lies?
2. Do not try to find any short cut. Check the hoses and
leads where it is probably very difficult to find out where
any trouble lies.
3. Check any trouble with the air purifier or pipeline system.
4. Check any damage to any sensor or the driving gear.
Automotive Servicing Safety Guide(2)
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5. Check the ignition lead: any breakage of any terminal,
crack on any spark plug or breakage at the insulation
of the ignition lead.
6. Check all the vacuum hoses: any right line, shrinkage,
bend, crack, fracture or damage.
7. Check the leads: any connection of sharp edges,
connection of hot surfaces (such as exhaust manifold),
shrinkage, burn or scratch at the insulation or right line
connection.
8. Check circuit connections: any pin corrosion, bend or
damage, inappropriate connection position or damaged
electrode lead.
Automotive Servicing Safety Guide(3)
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