Uni-t UTM 1231 User Manual [ru]

P/N: 41451518

UT231

Operating Manual

Digital Power Clamp

Meter

Model UT231

OPERATING MANUAL

Model UT231: OPERATING MANUAL

TABLE OF CONTENTS TITLE PAGE

Overview Unpacking Inspection Safety Information Rules For Safe Operation International Electrical Symbols The Meter Structure A. The Meter Front Structure B. The Meter Back and Bottom Structure Functional Buttons Display Symbols Measurement Operation A. AC Voltage + Frequency Measurement B. AC Current + AC Voltage Measurement C. Active Power + Phase Angle Measurement D. Apparent Power + Reactive Power Measurement E. Power Factor + Phase Angle Measurement F. Active Energy + Time Measurement

G. Temperature

+ Temperature Measurement

True RMS Measurement and Average Value Measurement

3 3 4 4 6 6 6 8 8 11 13 13 15 16 18 19 21 23 24

Model UT231: OPERATING MANUAL

TABLE OF CONTENTS TITLE PAGE

Three Phases Four Wires and Three Phases Three Wires Measurement Method Specifications A. General Specifications B. Environmental Requirements Accuracy Specifications A. AC Voltage B. Frequency C. AC Current D. Active Power E. Apparent Power F. Reactive Power G. Power Factor H. Phase Angle I. Active Energy J. Temperature Maintenance A. General Service B. Replacing the Battery

25 26 26 26 27 27 27 28 28 29 30 31 31 32 32 33 33 34

Model UT231: 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.

Model UT231 is a digital power clamp meter (hereafter

referred to as “the Meter”) is a handheld intelligent power meter which has both the features of digital current meter and also power measurement meter.

The Meter can measure Voltage, Current, Active Power, Apparent Power, Reactive Power, Power Factor, Phase Angle, Frequency, Active Energy , Temperature and etc.

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

English Operating Manual

Test Lead

Alligator Clip

Point Contact Temperature Probe

USB Interface Cable

Software

Tool Box

1.5V Battery (LR6)

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

Qty

1 piece 1 pair 1 pair 1 piece 1 piece 1 piece 1 piece 4 pieces

Model UT231: OPERATING MANUAL

Safety Information

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

CAT. III: Distribution level, fixed installation, with smaller transient overvoltages than CAT. IV. CAT IV: Primary supply level, overhead lines, cable systems.

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 6.

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

Model UT231: OPERATING MANUAL

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. Do not carry out the measurement when the Meter’s back case and / or battery door is opened to avoid electric shock. When the Meter working at an effective voltage over 30V in AC, special care should be taken. Use the proper terminals and function 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. Do not use the Meter if the surface of it is wet or the user’s hands are wet. When using the test leads, keep your fingers behind the finger guards. 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 opening the battery door, must make sure the Meter is power off. 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. 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 UT231: OPERATING MANUAL

International Electrical Symbols

AC (Alternating Current) Grounding Double Insulated Warning. Refer to the Operating Manual Deficiency of Built-In Battery Danger of High Voltage Conforms to Standards of European Union

The Meter Structure

A. The Meter Face View (see figure 1)

Brack Red

Figure 1

Model UT231: OPERATING MANUAL

Transformer Jaw: designed to pick up the AC

and DC current flowing through the conductor. It could transfer current to voltage. The tested conductor must vertically go through the Jaw center. Hand Guards: to protect user’s hand from

touching the dangerous area. Power button

Max/ button

MENU button

LOAD button (recall data)

CLEAR button (clear the stored reading)

MIN/ button

Temperature negative Input Terminal

Temperature positive Input Terminal

V: Voltage Input Terminal

COM Input Terminal

MAX/MIN button

CAL: calibration button

SAVE button (data store button)

USB button

LIGHT button (auto display backlight button)

HOLD button

LCD Display

Testing Leads (Red and Black)

Temperature Probe

Model UT231: OPERATING MANUAL

B.The Meter Back and Bottom Structure (see figure 2)

Figure 2 1 Infrared Interface 2 USB Communication Interface Cable

Functional Buttons

Below table indicated for information about the functional button operations.

Button POWER

HOLD

LIGHT

Operation Performed

Press and hold POWER for 1 second to turn the Meter on. Press POWER again to turn the Meter off.

Press HOLD to enter the Hold mode in any mode, beeps. Press HOLD again to exit the Hold mode to return to measurement mode, the Meter beeps and Press LIGHT to turn the display backlight on. The display backlight will be off automatically after 30 seconds.

Press MENU to display the following functions in sequence:

appears and

disappears.

the Meter

Model UT231: OPERATING MANUAL

Button MENU

USB

Operation Performed

AC Voltage (main display) + Frequency (secondary display) AC Current (main display) + AC Voltage (secondary display) Active power (main display) + Phase angle (secondary display) Apparent power (main display) + Reactive power (secondary display) Power factor (main display) + Phase angle (secondary display) Active Energy (main display) + Time (secondary display)

Temperature Temperature Press LOAD once, MR icon shown, the Meter displays the next stored reading, the left secondary display showing the index increase one. Press USB once to turn the USB

(main display) +

(secondary display)

Button

USB

LOAD

CAL

SAVE

Operation Performed

interface on, USB appears and the Meter beeps. Press USB again to turn the USB interface off, USB disappears and the Meter beeps. It is invalid at active energy mode. Press once to enter LOAD mode, MR appears and the Meter beeps. Press again to exit LOAD mode, MR disappears and the Meter beeps. Press and hold LOAD for 1 second to display the stored data quickly.

Calibrating data. It is not recommended to calibrate the meter without authorization.

Press once to store single reading, MEM appears and the Meter beeps. Press and hold for over 1 second to continuous store reading, MEM blinks and the Meter beeps. The index number

Model UT231: OPERATING MANUAL

SAVE

CLEAR

MAX/MIN

Operation PerformedButton

shown on the left secondary display keep on increasing. Press SAVE again to exit. The maximum number of data store is 99, when it achieves 99, the Meter shows FUL. Press CLEAR to clear the stored reading in order to store next reading.

At active energy range, press to reset time the zero, then restart the timing. At all other ranges, press to clear stored readings. Press once at LOAD mode, MR icon shown, the Meter displays the previous stored reading, the left secondary display showing the index decrease one.

Starts recording of maximum and minimum vales. Press to step through maximum (high), minimum (low) and the current AC voltage True RMS value

Operation PerformedButton

MAX/MIN at any mode except at the following ranges:

Power factor (main display) + Phase angle (secondary display) Active Energy (main display) + Time (secondary display)

Temperature Temperature

(main display) +

(secondary display)

+ 26 hidden pages