UNI-T UT71A User Manual (English)

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UNI-T UT71A Specifications

General

Data hold	Yes
Product type	Digital multimeter
Frequency range	0.02 - 200000 kHz
AC current range	0.2 - 10 A
AC voltage range	2 - 1000 V
DC voltage range	0.2 - 1000 V
Capacitance range	20 - 20000 nF
Statistic function	Maximum, Minimum
Basic accuracy (frequency)	0.1%+15
Basic accuracy (DC current)	0.2%+20
Basic accuracy (DC voltage)	0.1%+8
Basic accuracy (resistance)	0.5%+20
Basic accuracy (capacitance)	1.5%+20
Dimensions (WxDxH)	93 x 40 x 200 mm
Battery voltage	9 V

Weight and Dimensions

Weight	384 g

Summary

Chapter 1 Before You Start

Overview

This Operating Manual covers information on safety and cautions. Please read the relevant information carefully and observe all the Warnings and Notes strictly.

Unpacking Inspection

Open the package case and take out the Meter. Check the items shown on Table 1-1 for missing or damaged parts.

Safety Information

This Meter complies with the standards IEC61010 safety measurement requirement: in pollution degree 2, overvoltage category (CAT. III 1000V, CAT.IV 600V) and double insulation.

Rules For Safe Operation

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:

International Electrical Symbols

Symbols used on the Meter and in this manual are explained in Table1-2.

Chapter 2 Getting Acquainted

Turning the Meter On

To turn the Meter on, turn the rotary switch from OFF to any switch setting.

Battery Considerations

The Meter uses one 9V Battery (NEDA 1604, 6F22, 006P). The following paragraphs describe several techniques used to conserve battery power.

Automatic Power Off

The display blanks and the Meter goes into a "sleep" mode if you have not changed the rotary switch position or pressed a button for a set period.

Automatic Backlight Off

Press LIGHT button to turn the backlight on and press LIGHT again to turn it off. Press EXIT to exit the feature.

Low Battery Indication

A constant battery icon() in the upper left corner of the display notifies you that the batteries are low and should be replaced.

The Meter Structure

The Figure 2-1 shows the Meter structure. 1. LCD Display 2. Functional Buttons 3. Rotary Switch 4. Input Terminals

Rotary Switch

Turn the Meter on by selecting any measurement function. The Meter presents a standard display for that function.

Functional Buttons

The buttons activate features that augment the function selected with the rotary switch. The buttons are shown in Table 2-2.

The Meter Functions Vs Displays

Table 2-3 shows the cross reference of function and display:

Selecting the Range

Press RANGE to select either a fixed range or the autorange feature.

Understanding the Display

Display features are shown in Figure 2-2 and described in Table 2-4.

Analogue Bar Graph

The bar graph provides an analogue indication of the measured input. For most measurement functions, the bar graph updates 10 times per second.

Using MAX MIN

The MAX MIN mode stores minimum (MIN) and maximum (MAX) input values. When the input goes below the stored minimum value or above the stored maximum value, the Meter beeps and stores the new value.

Chapter 3 Making Measurement

Introduction

Chapter 3 explains how to make measurements. Most measurement functions can be selected by using the rotary switch.

Measuring Voltages

To avoid harms to you or damages to the Meter from electric shock, please do not attempt to measure voltages higher than 1000V, although readings may be obtained.

Measuring Currents

To avoid possible damage to the Meter or to the equipment under test, check the Meter's fuses before measuring current.

Measuring Resistance

To avoid harms to you, please do not attempt to input voltage higher than 60V DC or 30V rms AC.

Testing for Continuity

To avoid harms to you, please do not attempt to input voltage higher than 60V DC or 30V rms AC.

Testing Diodes

To avoid harms to you, please do not attempt to input voltages higher than 60V DC or 30V rms AC.

Measuring Capacitance

To ensure accuracy, the Meter inside is discharged against the tested capacitor. "DIS.C" will be shown on the display when it is under discharging, this process will be quite slow.

Measuring Frequency / Duty Cycle

To avoid harms to you, please do not attempt to input voltages higher than 30V rms.

Measuring Temperature

To avoid harms to you, please do not attempt to input voltages higher than 60V DC or 30V rms AC.

4~20mA loop current

It shows the mA measured value or output level in %, in a 4-20mA scale

Power Measurement (UT71E only)

To avoid damages to the Meter, please do not attempt to input higher than 250V from outlet altogether reading may be obtained.

Chapter 4 Using Store, Recall & Send Features

Introduction

Chapter 4 shows you how to use stores, recall and communication features available on the Meter

Storing and Clearing Readings

To store readings, proceed as follows: Press STORE once, STO and "no.xxxx" appears to confirm the operation and the left secondary display shows the current measurement reading.

Recalling Stored Readings

Use the following procedure to recall the stored reading: Press RECALL to recall the stored value and RCL appears to confirm the operation.

Using Send

When using a Send feature, please refer to the Installation Guide of the included CD-ROM.

Chapter 5 Changing the Default Setting

Introduction

The Meter allows you to change the default operating configuration of the Meter by changing setup options made at the factory.

Selecting Setup Options

To enter the Setup mode, turn the Meter on and press and hold SETUP button for over 1 second.

Chapter 6 Maintenance

General Service

Periodically wipe the case with a damp cloth and mild detergent. Do not use abrasives or solvents.

Replacing the Fuses

To avoid electrical shock or arc blast, or personal injury or damage to the Meter, use specified fuses ONLY in accordance with the following procedure.

Replacing the Battery

To avoid false readings, which could lead to possible electric shock or personal injury, replace the battery as soon as the battery indicator appears.