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UNI-T UT208

UNI-T UT208
54 pages
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Model UT207/208
OPERATING MANUAL
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UNI-T UT208 Specifications

General IconGeneral
DisplayLCD
Digits3.5
Max Voltage Measurement600V
Diode TestYes
Continuity TestYes
TypeClamp Meter
Frequency Measurement10Hz~10MHz
AC Voltage Range0.1V~600V
DC Voltage Range0.1V~600V
Frequency Range10Hz~10MHz
Weight300g

Summary

Overview of Uni-T UT207208 Meter

Safety Warning for Initial Use

Read Safety Information and Rules for Safe Operation carefully before using the Meter to avoid electric shock or personal injury.

Meter Description and Features

Describes the meter as a 3 5/6 digits, steady operation, reliable measuring instrument with overload protection.

Unpacking and Inspection Guide

Safety Information and Standards

CAT. II Voltage Category

Local level, appliance, PORTABLE EQUIPMENT etc., with smaller transient overvoltages than CAT. III.

CAT. III Voltage Category

Distribution level, fixed installation, with smaller transient overvoltages than CAT. IV.

Warning Definition in Manual

Identifies conditions and actions that pose hazards to the user or may damage the Meter or equipment.

Note Definition in Manual

Identifies information that the user should pay attention to.

Reference to Electrical Symbols

Symbols used on the Meter and in the Operating Manual are explained on page 10.

Rules for Safe Operation

General Safety Operation Rules

Adhere to the following rules to avoid electric shock, personal injury, or damage to the Meter or equipment.

International Electrical Symbols Guide

The Meter Structure Components

Hand Guards

Protects the user's hand from touching dangerous areas.

Trigger Mechanism

Press lever to open transformer jaws; releasing pressure closes them.

Input Terminals

Points for connecting test leads.

LCD Display Overview

The screen where measurements are shown.

Rotary Switch Function

Selects measurement modes and ranges.

Transformer Jaw Design

Designed to pick up AC/DC current by transferring it to voltage.

Functional Buttons Overview

Identifies the functional buttons on the meter.

Functional Button Operations

SELECT, MAXMIN, HOLD Operations

Details operations for SELECT, MAX/MIN, and HOLD buttons.

HOLD Button Specifics

Describes HOLD button operations: entering/exiting mode, backlight control.

Hz Button Functionality

Measures frequency and duty cycle when Meter is at %Hz, V~, and A~.

ZERO Button Functionality

Zeros the display before measuring DC current.

Functional Button Effectiveness Chart

Display Symbols and Meanings

INRUSH Indicator

Indicator for Surge current.

MINMAX Reading Indicators

Minimum and Maximum reading displayed.

ZERO Indicator

Indicator for zeroing.

HOLD Indicator

Data hold is active.

AUTO Range Indicator

Meter is in auto range mode.

RMS Indicator

True RMS indicator.

ACDC Indicators

Indicators for AC voltage/current and DC voltage.

Low Battery Warning

The battery is low. Warning: Replace battery to avoid false readings and injury.

Sleep Mode Indicator

Sleep mode is on.

Diode Test Symbol

Indicates test of diode.

Continuity Buzzer Symbol

The continuity buzzer is on.

Resistance Units

Ω, ΚΩ, ΜΩ: Units for resistance measurement.

Frequency Units

Hz, kHz, MHz: Units for frequency measurement.

Voltage Units

mV, V: Units for voltage measurement.

Current Unit

A: Unit for current measurement.

Temperature Units (CF)

Units for temperature measurement: Centigrade and Fahrenheit.

Duty Cycle Unit

Duty cycle measurement.

Measurement Operation Overview

DCAC Voltage Measurement

Instructions for measuring DC and AC voltage using the meter.

DCAC Voltage Measurement Warning

Do not measure voltages higher than 600V AC/DC to avoid shock or damage.

DCAC Voltage Measurement Details

DC Voltage Ranges

Lists the available DC voltage measurement ranges: 6.6V, 66V, and 600V.

AC Voltage Ranges

Lists the available AC voltage measurement ranges: 6.6V, 66V, and 600V.

Connecting for Voltage Measurement

Steps to connect the meter for DC/AC voltage measurements, including lead insertion and switch setting.

Voltage Measurement Note

Disconnect testing leads after completing DC/AC voltage measurement.

Measuring Resistance

Resistance Measurement Warning

Disconnect power and discharge capacitors before measuring resistance to avoid damage.

Resistance Ranges

Lists the available resistance ranges from 660Ω to 66MΩ.

Connecting for Resistance Measurement

Steps to connect the meter for resistance measurement, including lead insertion and switch setting.

Resistance Measurement Note

Testing Diodes

Diode Test Warning

Disconnect power and discharge capacitors before testing diodes to avoid damage.

Diode Test Functionality

Uses diode test to check semiconductors by measuring junction voltage drop.

Connecting for Diode Test

Steps to connect the meter for testing diodes out of a circuit.

Diode Test Note

Testing for Continuity

Continuity Test Warning

Disconnect power and discharge capacitors before continuity testing to avoid damage.

Continuity Test Procedure

Steps to connect the meter and test for continuity, noting buzzer behavior based on resistance.

Continuity Test Note

Frequency Measurement

Frequency Measurement Warning

Do not measure voltages higher than 600V AC/DC to avoid shock or damage.

Frequency Ranges

Lists the available frequency measurement ranges from 660Hz to 66MHz.

Connecting for Frequency Measurement

Steps to connect the meter for frequency measurement, including lead insertion and switch setting.

Frequency Measurement Note

Duty Cycle Measurement

Duty Cycle Measurement Warning

Do not measure voltages higher than 600V AC/DC to avoid shock or damage.

Duty Cycle Range

The duty cycle measurement range is 0.1%~99.9%.

Connecting for Duty Cycle Measurement

Steps to connect the meter for duty cycle measurement, including lead insertion and switch setting.

Duty Cycle Measurement Note

DC Current Measurement

Current Measurement Ranges

Measurement ranges for DC current are 66A and 1000A.

Procedure for DC Current Measurement

Steps to measure DC current using the transformer jaw.

DC Current Measurement Note

AC Current Measurement

AC Current Measurement Ranges

Measurement ranges for AC current are 66.00A and 1000A.

Procedure for AC Current Measurement

Steps to measure AC current using the transformer jaw.

Surge Current Measurement

Procedure to measure surge current, including setting the rotary switch and pressing SELECT.

AC Current Measurement Note

Disconnect conductor from jaw after AC current measurement.

Temperature Measurement (UT208 only)

Temperature Measurement Range

Range for temperature measurement is -40°C to 1000°C and -40°F to 1832°F.

Procedure for Temperature Measurement

Steps to connect the meter and temperature probe for measuring temperature.

Temperature Measurement Note

Sleep Mode Functionality

Sleep Mode Activation

Meter automatically turns off after 15 minutes of inactivity to preserve battery.

Exiting Sleep Mode

Meter can be activated by turning rotary switch or pressing buttons; Sleep Mode can be disabled.

Specifications

General Specifications

Details display, polarity, overloading, sampling, deviation, drop test, jaw size, power source.

Battery Life and Dimensions

Provides information on battery life, meter dimensions, and weight.

Environmental Requirements

Specifies suitability for indoor use, operating/storage altitude, and temperature/humidity limits.

Accurate Specifications

Accuracy Definition

Defines accuracy as ± (a% reading + b digits) with 1-year guarantee and temperature coefficient.

DC Voltage Accuracy

Details accuracy, resolution, and overload protection for DC voltage ranges.

AC Voltage Accuracy

Details accuracy, resolution, and overload protection for AC voltage ranges.

AC Voltage Remarks

Input impedance, frequency response, and adjustments for non-sine wave input.

Resistance Accuracy

Details accuracy, resolution, and overload protection for resistance measurements.

Diode Test Accuracy

Details accuracy, resolution, and overload protection for diode testing.

Continuity Test Accuracy

Details accuracy and overload protection for continuity testing, noting buzzer behavior.

Frequency Accuracy

Details accuracy, resolution, overload protection, and input sensitivity for frequency measurement.

Duty Cycle Accuracy

Details accuracy and overload protection for duty cycle measurement.

DC Current Accuracy

Details accuracy, resolution, and overload protection for DC current measurement.

DC Current Warning

Operating temperature must be 0°C ~ 40°C when measuring current.

DC Current Remarks

Notes on reading stability, sensitivity to shock, and precise measurement procedure.

AC Current

Details accuracy, resolution, frequency response, and overload protection for AC current.

Temperature Accuracy (UT208 only)

Details accuracy, resolution, and overload protection for temperature measurement.

MAINTENANCE

Maintenance Warning

Do not attempt to repair or service unless qualified; avoid getting water inside the case.

General Service Procedures

Instructions for cleaning the meter, terminals, and storage precautions.

Replacing the Battery

Battery Replacement Warning

Replace battery when indicator appears to avoid false readings and injury.

Battery Replacement Procedure

Steps to turn off, disconnect, open case, replace battery, and reassemble.

Battery Replacement Steps

Detailed steps for replacing the battery: turn off, disconnect, open, replace, reassemble.

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