Unit UT108 Manuale utente
P/N:110401102526
Operating Manual
UT108/109
Handheld Automotive Multi-Purpose Meters
UT108/109 OPERATING MANUAL
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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/DC Voltage Testing
B. DC millvoltage Testing
C. AC/DC Current Testing
D. Resistance Testing
E. Continuity Testing
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Title Page
F. Diode Testing
G. Capacitance Testing
H. Frequency Testing
I. Temperature Measurement (UT109 only)
J. Dwell Testing
K. Engine Tach (Rotation Speed) Testing “RPMx10”
L. Operation of Hold Mode
M. RANGE button
N. MAX MIN button
O. Data Outputting
P. Display backlight
Q. The BLUE button
R. Automatic power off
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
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UT108/109 OPERATING MANUAL
E. Battery Power Consumption Testing when the Engine Is off
F. Trigger Voltage Battery Load Testing
G. Voltage Drop Testing
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
Title Page
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UT108/109 OPERATING MANUAL
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General Specications
Accurate Specications
A. DC Voltage
B. AC Voltage
C. DC millvoltage
D. AC Current
E. DC Current
F. Resistance
G. Capacitance
H. Frequency
I. Diode
J. Continuity
K. Dwell
L. Tach (Rotation Speed)
M. Temperature
Maintenance
A. General Services
B. Replacing the Fuses
C. Replacing the Battery
Title Page
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UT108/109 OPERATING MANUAL
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.
Automotive Digital Multimeter Model UT108/UT109 (hereafter referred to as “the Meter”)
is a 4000 counts, 3-3/4 digits manual ranging meter. The meter uses large scale of
integrated circuit with integrated A/D converter as its core. Spotting a unique design
with an extra large LCD display. Connect Test Leads display, full overload protection
and unique outlook design. For this reason, it emerges as an electric meter with more
outstanding performance for safer operation than other meters. In addition to the Dwell,
Tach and Data Hold feature, the Meter can be used to test the AC/DC voltage, AC/DC
current, resistance, frequency, diode, continuity, and Capacitance.
UT109 has an extra temperature feature.
UT108/109 OPERATING MANUAL
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Unpacking Inspection
Open the package case and take out the Meter. Check the following items carefully to see
any missing or damaged part:
Item Description Qty
1 English Operating Manual 1 piece
2 Test Lead 1 pair
K-Type Point Contact Temperature Probe.
3 (UT109 only and It is only suitable for 1 pair
measuring temperature under 230℃)
4 Alligator Clip 1 piece
5 RS232C interface cable 1 piece
6 CD-ROM 1 piece
7 9V Battery (NEDA 1604, 6F22 or 006P) 1 piece
8 Multi-Purpose Socket ( Optional) 1 piece
9 USB interface cable ( Optional) 1 piece
In the event you nd any missing or damage, please contact your dealer immediately.
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UT108/109 OPERATING MANUAL
Safety Information
This Meter complies with standards IEC61010: in pollution degree 2, overvoltage category
(CATIII 1000V, CATⅣ 600V) and double insulation.
CAT III: Distribution level, xed installation, with smaller transient overvoltages than CAT
IV
CAT IV: Primary supply level, overhead lines, cable systems ets.
Use the Meter only as specied 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 13.
UT108/109 OPERATING MANUAL
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Rules For Safe Operation
Warning
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:
● 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 leads for damaged insulation or exposed metal. Check the test leads
for continuity. Replace damaged test leads with identical model number or electrical
specications before using the Meter.
● When using the test leads, keep your ngers behind the nger guards.
● Do not apply more than the rated voltage, as marked on the Meter, between the
terminals or between any terminal and grounding.
● When the meter working at an effective voltage over 60V in DC or 30V rms in AC,
special care should be taken for there is danger of electric shock.
● Use the proper terminals, function, and range for your measurements.
● 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
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