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UT107
UNI-T UT107 User Manual
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37
Model UT107: OPERA
TING MANUAL
Component
V
oltage
Switch
Lead
Grounding
Battery Lead Connector
Wiring
300 mV
200 mV
100 mV
50 mV
0.0 V
Compare the readings of the tested voltages against the
said table. If the voltage is on the high side, check the
components and connectors to see if there is anything
wrong. If anything wrong is found, do necessary servicing.
36
38
Table of Contents
Table of Contents
1
Overview
3
Unpacking Inspection
4
Safety Information
4
Rules for Safe Operation
5
Automotive Servicing Safety Guide
7
International Electrical Symbols
9
The Meter Structure
10
Rotary Switch
11
Functional Buttons
11
Display Symbols
12
Measurement Operation
13
Part 1 Multimeter Basic Testing
13
DC Voltage Testing
13
AV Voltage Testing
15
DC Current Testing
17
Resistance Testing
19
Diode Testing
21
Continuity Testing
23
Battery Measurement
24
Temperature Measurement
25
Frequency Measurement
26
Measuring Duty Cycle
27
Dwell Testing
28
Engine Tach (Rotation Speed) Testing "Rpmx10
29
Operation of Hold Mode
30
Part 2 Diagnosis of Automotive Troubles
31
Fuse Testing: Check the Fuse to See if It Is Blown out
31
Switch Testing: Check the Switch to See if It Can Work Correctly
32
Solenoid or Relay Testing
32
Starting/Charging System Testing
33
Battery Power Consumption Testing When the Engine Is off
34
Trigger Voltage Battery Load Testing
35
Voltage Drop Testing
36
Charging System Voltage Testing
38
Ignition System Testing
39
Ignition Coil Testing
39
Ignition System High Voltage Damper Testing
40
Hall Switch/Sensor Testing
41
Magnetic Resistance Sensor
42
Rpmx10 Testing
43
Fuel System Testing
44
Engine Sensor Testing
45
Oxygen Sensor
46
Temperature Sensor
48
Position Sensor
48
Absolute Pressure (MAP) and Baro Sensor
49
Mass Air Flow (MAF) Sensor
51
General Specifications
53
Accurate Specifications
54
DC Voltage
54
AC Voltage
54
DC Current
55
Resistance
55
Diode
55
Continuity Testing
56
Battery
56
Temperature
56
Dwell Testing
57
Frequency
57
Duty Cycle
57
Tach (Rotation Speed) Testing
58
Maintenance
59
General Services
59
Replacing the Fuses
60
Replacing the Battery
61
4
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UNI-T UT107 Specifications
General
Brand
UNI-T
Model
UT107
Category
Multimeter
Language
English
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