UNI-T UT120A

4000-count notebook type auto-ranging
“Safety Information"
Safety Information
D
I
. Meter Description(See Figure 1)
International Electrical Symbols
2. SELECT Button to toggle between Resistance, Capacitance, Diode
and Continuity functions.(Capacitance for UT120B only).
Knob
which, however, will
if under DCV
and ACV ranges
DCV or ACV status with the range default at 400mV(DCV) or 4V(ACV)
press the button to switch between Hz and %
measurement.
Making Measurements
1.Measuring DC Voltage(See Figure 2)
2. Measuring AC Voltage(See Figure 3)
3. Measuring Resistance(See Figure 4)

UNI-T UT120A Specifications

General

Display	LCD
Diode Test	Yes
Continuity Buzzer/Test	Yes
Data Hold	Yes
Auto Power Off	Yes
Auto Range	Yes
Input Impedance for DC Voltage Measurement	10MΩ
Operating Temperature	0°C to 40°C
Safety Rating	CAT III 600V
Display Count	4000
DC Current	40mA
Resistance	400Ω/4kΩ/40kΩ/400kΩ/4MΩ/40MΩ ±(0.8%+3)
Capacitance	40nF/400nF/4µF/40µF/100µF ±(3.0%+5)
Frequency	10Hz-10MHz

Summary

Introduction

Safety Information

General Safety Precautions

Ensures safe operation by outlining precautions for test pen integrity, finger placement, voltage limits, and meter casing.

Meter Description

LCD Display and Buttons

Details the multimeter's LCD display, SELECT button, and Relative Value Measurement (REL) button.

Function Switch and Measurement Controls

Describes the function selection knob, Hz/% measurement, Data Hold button, and input terminals.

Button Functional Description

SELECT Button Functions

Used to switch between resistance, capacitance, buzzer continuity, and diode measurements.

REL Button (Relative Value Measurement)

Sets a reference value for subsequent measurements, subtracting it from new readings.

Data Hold (HOLD Button)

Locks displayed values on the LCD, allowing for later review without losing the reading.

Hz% Measurement

Switches between Hz and % measurement modes for DCV, ACV, and frequency functions.

Making Measurements

Measuring DC Voltage

Steps for measuring DC voltage, including setting the knob, connecting probes, and reading the LCD.

Measuring AC Voltage

Procedure for measuring AC voltage, covering knob setting, probe connection, and reading display.

Measuring Resistance

Guide to measuring resistance, including setting the knob, connecting test pens, and reading results.

Measuring Frequency and Duty Cycle

Instructions for measuring frequency and duty cycle, including setting the knob and connecting test pens.

Testing Diodes and Continuity

Procedure for testing diodes and continuity, including setting the knob and connecting test pens.

Measuring Capacitance

Steps for measuring capacitance, including setting the knob, using relative mode, and connecting test pens.

Technical Specifications

General Specifications

Details general parameters like voltage limits, range selection, display max, operating temperature, and dimensions.

Accuracy Specifications

Provides accuracy data for DC Voltage, AC Voltage, Resistance, Capacitance, Frequency, Duty Cycle, Diode, and Continuity.

Battery Replacement