UNI-T UT107 User Manual

Table of Contents
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Model UT107: OPERATING MANUAL
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. DC Voltage Testing
B. AV Voltage Testing
C. DC Current Testing
D. Resistance Testing
E. Diode Testing
F. Continuity Testing
G. 12V Battery Measurement
H. Temperature Measurement
I. Frequency Measurement
J. Measuring Duty Cycle
K. Dwell Testing
L. Engine Tach (Rotation Speed)
Testing “RPMx10”
M. Operation of Hold Mode
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

UNI-T UT107 Specifications

General

Display	LCD
Max Current	10A
Resistance Measurement	200Ω to 20MΩ
Battery	9V
Continuity Buzzer	Yes
Diode Test	Yes
Transistor Test	Yes
Input Impedance for DC Voltage Measurement	10MΩ
Tach (RPM)	Yes
Dwell Angle	Yes
Type	Digital
Digits	3.5
Frequency Measurement	20kHz
Temperature Range	-40°C to 1000°C
Sampling Rate	3 times per second

Summary

Product Overview and Safety

Meter Introduction and Controls

General introduction to the multimeter, its features, layout, controls, and display symbols.

Safety Precautions and Automotive Guidelines

Essential safety guidelines, warnings, and precautions for meter use and automotive servicing.

Unpacking, Symbols, and Meter Structure

Instructions for checking package contents and explanation of electrical symbols.

Basic Measurement Operations

Voltage and Current Measurements

Procedures for measuring DC voltage, AC voltage, and DC current with the multimeter.

Resistance, Diode, and Continuity Tests

Procedures for testing resistance, diodes, and checking electrical continuity.

Battery, Temperature, and Frequency

Procedures for measuring 12V battery voltage, temperature, and signal frequency.

Dwell, Tachometer, and Hold Mode

Procedures for measuring duty cycle, dwell angle, engine speed, and using hold mode.

Automotive Diagnostics and Sensor Testing

Circuit Component and System Testing

Procedures for testing automotive fuses, switches, solenoids, relays, and starting/charging systems.

Vehicle System Performance Tests

Tests for battery power consumption, load voltage, voltage drops, and charging system performance.

Ignition System Component Testing

Procedures for testing ignition coils, dampers, Hall sensors, magnetic sensors, and engine speed.

Fuel and Engine Sensor Diagnostics

Procedures for testing fuel system components and various engine sensors like O2, temp, position, MAP, and MAF.

Technical Specifications

General Meter Specifications

Overview of operating conditions, dimensions, safety compliance, and display features.

Measurement Accuracy and Ranges

Detailed accuracy, resolution, and overload protection for all measurement functions.

Maintenance and Service

General Service and Cleaning

Routine care, cleaning, and storage instructions.

Fuse and Battery Replacement

Step-by-step procedures for replacing fuses and the battery.