Uni-t UTM 1203 User Manual [ru]

UT203/204

P/N: 41416301

Registered Design No.: ZL02 3 357791.6

Digital Clamp Multimeters

Model UT203/204: OPERATING MANUAL

Table of Contents Title Page

Overview Unpacking Inspection Safety Information Rules For Safe Operation International Electrical Symbols The Meter Structure Rotary Switch Functional Buttons The Effectiveness of Functional Buttons Display Symbols Measurement Operation A. DC/AC Voltage Measurement B. Measuring Resistance C. Testing Diodes D. Testing for Continuity E. Frequency Measurement F. Duty Cycle Measurement G. DC/AC Current Measurement

3 4 5 6 9 10 11 12 14 15 18 18 20 22 24 26 28 30

Model UT203/204: OPERATING MANUAL

Title Page

Sleep Mode Specifications A. General Specifications B. Environmental Requirements Accuracy Specifications A. DC Voltage B. AC Voltage C. Resistance D. Diode Test E. Continuity Test F. Frequency G. Duty Cycle H. DC Current I. AC Current Maintenance A. General Service B. Replacing the Battery

32 33 33 34 35 35 36 37 37 38 39 40 40 42 44 44 45

Model UT203/204: OPERATING MANUAL

Overview

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

Warning

To avoid electric shock or personal injury, read the “Safety Information” and “Rules for Safe Operation” carefully before using the Meter.

Digital Clamp Multimeter Model UT203/UT204 (hereafter referred to as “the Meter”) are 3 3/4 digits with steady operations, fashionable structure and highly reliable measuring instrument. The Meter uses large scale of integrated circuit with double integrated A/D converter as its core and has full range overload protection.

The Meter can not only measure AC/DC Voltage, AC/DC Current, Frequency, Duty Cycle, Resistance, Diodes, Continuity but also it has Data Hold, Sleep Mode and Relative Mode features.

UT204 has an extra True RMS feature.

Model UT203/204: OPERATING MANUAL

Unpacking Inspection

Open the package case and take out the Meter. Check the following items carefully to see any missing or damaged part:

Item Description Qty

1 2 3 4 5

In the event you find any missing or damage, please contact your dealer immediately.

English Operating Manual Test Lead Test Clip Carrying Bag 9V Battery (NEDA1604, 6F22 or 006P)

1 piece 1 pair 1 pair 1 piece 1 piece

Model UT203/204: OPERATING MANUAL

Safety Information

This Meter complies with the standards IEC61010: in pollution degree 2, overvoltage category (CAT. II 600V, CAT. III 300V) and double insulation.

CAT. II: Local level, appliance, POR TABLE EQUIPMENT etc., with smaller transient overvoltages than CAT. III. CAT. III: Distribution level, fixed installation, with smaller transient overvoltages than CAT. IV

Use the Meter only as specified in this operating manual, otherwise the protection provided by the Meter may be impaired.

In this manual, a Warning identifies conditions and actions that pose hazards to the user, or may damage the Meter or the equipment under test.

A Note identifies the information that user should pay attention to. International electrical symbols used on the Meter and in this Operating Manual are

explained on page 9.

Model UT203/204: OPERATING MANUAL

Rules For Safe Operation

Warning

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:

Before using the Meter inspect the case. Do not use the Meter if it is damaged

or the case (or part of the case) is removed. Look for cracks or missing plastic. Pay attention to the insulation around the connectors. Inspect the test leads for damaged insulation or exposed metal. Check the test

leads for continuity. Replace damaged test leads with identical model number or electrical specifications before using the Meter. Do not apply more than the rated voltage, as marked on the Meter, between the

terminals or between any terminal and grounding. If the value to be measured is unknown, use the maximum measurement position and reduce the range step by step until a satisfactory reading is obtained. When measurement has been completed, disconnect the connection between

the test leads and the circuit under test, remove the testing leads away from the input terminals of the Meter and turn the Meter power off.

Model UT203/204: OPERATING MANUAL

The rotary switch should be placed in the right position and no any changeover

of range shall be made during measurement is conducted to prevent damage of the Meter. Do not carry out the measurement when the Meter’s back case and battery

compartment are not closed to avoid electric shock. Do not input higher than 600V between the two Meter’s input terminal to avoid

electric shock and damages to the Meter. When the Meter working at an effective voltage over 60V in DC or 30V rms in AC,

special care should be taken for there is danger of electric shock. Use the proper terminals, function, and range for your measurements.

Do not use or store the Meter in an environment of high temperature, humidity,

explosive, inflammable and strong magnetic field. The performance of the Meter may deteriorate after dampened. When using the test leads, keep your fingers behind the finger guards.

Disconnect circuit power and discharge all high-voltage capacitors before testing

resistance, continuity and diode. Replace the battery as soon as the battery indicator appears. With a low

battery, the Meter might produce false readings that can lead to electric shock and personal injury. When servicing the Meter, use only the same model number or identical electrical

specifications replacement parts.

Model UT203/204: OPERATING MANUAL

When servicing the Meter, use only the same model number or identical electrical

specifications replacement parts. The internal circuit of the Meter shall not be altered at will to avoid damage of

the Meter and any accident. Soft cloth and mild detergent should be used to clean the surface of the Meter

when servicing. No abrasive and solvent should be used to prevent the surface of the Meter from corrosion, damage and accident. The Meter is suitable for indoor use.

Turn the Meter off when it is not in use and take out the battery when not using

for a long time. Constantly check the battery as it may leak when it has been using for some time,

replace the battery as soon as leaking appears. A leaking battery will damage the Meter.

Model UT203/204: OPERATING MANUAL

International Electrical Symbols

AC (Alternating Current) DC (Direct Current) AC or DC Grounding Double Insulated Warning. Refer to the Operating Manual Deficiency of Built-In Battery Continuity Test Diode Fuse Conforms to Standards of European Union

Model UT203/204: OPERATING MANUAL

The Meter Structure (see figure 1)

Input Terminals

1. LCD Display

2. Functional Buttons

3. Rotary Switch

4. Trigger: press the lever to open the transformer

5. jaws. When the pressure on the lever is released, the jaws will close. Hand Guards: to protect user’s hand from touching

6. the dangerous area. Transformer Jaw: designed to pick up the AC and

7. DC current flowing through the conductor. It could transfer current to voltage. The tested conductor must vertically go through the Jaw center.

(figure 1)

Model UT203/204: OPERATING MANUAL

Rotary Switch

Below table indicated for information about the rotary switch positions.

Rotary Switch Position

OFF

Hz / Duty%

40A 400A

Function

Power is turned off AC or DC voltage measurement Resistance measurement : Diode test : Continuity test Frequency Measurement and Duty Measurement AC and DC current measurement range

Model UT203/204: OPERATING MANUAL

Functional Buttons

Below table indicated for information about the functional button operations.

Button Operation Performed

HOLD

REL

Press HOLD to enter the Hold mode in any mode, the Meter beeps.

Press HOLD again to exit the Hold mode, the Meter beeps.

At and range: Press to select manual ranging measurement mode. The Meter

is default to auto ranging measurement mode. When the Meter is at manual ranging measurement mode, press

to step down the range.

At range:

Press to enter the REL mode.

It subtracts a stored value from the present measurement value

and displays a result. At Hz/Duty% range:

Press to switch between Hz measurement mode and Duty % measurement mode.

Model UT203/204: OPERATING MANUAL

Button Operation Performed

SELECT

Press SELECT button to select the alternate functions marked in blue colour on the Meter’s faceplate including Hz, Duty%,

, 40 ,

After the Meter entering Sleep Mode, press and hold SELECT to

turn the Meter on, it will disable the Sleep Mode feature.

and

A A

400

Model UT203/204: OPERATING MANUAL

The Effectiveness of Functional Buttons

Not every functional buttons can be used on every rotary switch positions. Below table describe which functional buttons can be used on which rotary switch positions

Rotary Switch

Positions

Hz / Duty%

40A

400A

SELECT

N/A

l l

Functional Buttons

REL

l l

N/A

l l l

HOLD

l l l l l l

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