UNI-T UT261A Phase Sequence and Motor Rotation Indicator Instruction Manual

: June 6, 2024
: UNI-T

Table of Contents

UNI-T UT261A Phase Sequence and Motor Rotation Indicator
Safety instructions
Symbols
Specification
Maintenance
Accessories
MORE INFORMATION
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UNI-T UT261A Phase Sequence and Motor Rotation Indicator

Safety instructions

Attention : it refers to the circumstances or behaviours possibly making UT261A damaged.
Warning: it refers to the circumstances or behaviours endangering the user.

To avoid electric shocks or fires, please follow the regulations below.

Before using or repairing the product, please read the safety instructions below carefully.
Please follow the local and national safety codes.
Do wear personal protective equipment to avoid electric shocks and other injuries.
Do use the product with the method described by the manufacturer, otherwise, the safety characteristics or protective actions provided by it will possibly be damaged.
Check whether the insulators of the test leads are damaged or have any exposed metal. Inspect the continuity of the test leads. If any test lead is damaged, replace it.
Pay special attention if the voltage is a true RMS of 30VAC or 42VAC as peak, or 60VDC because these voltages are likely to cause electric shocks.
When a probe is used, put fingers away from its contact and behind its finger-protecting device.
The impedance generated by the transient current of the extra operating circuit connected in parallel will possibly affect the measurement adversely.
Before measuring a dangerous voltage, such as a true RMS of 30VAC, or 42VAC as peak, or 60VDC, make sure the product is operating normally.
Do not use UT261A after any part of it has been dismantled
Do not use UT261A close to explosive gases, steam, or dust.
Do not use UT261A in a humid place.

Symbols

The following indication symbols are used on UT261A or in this Manual.

Description of a complete UT261A
The lights and jacks are described in Fig.

L1, L2 and L3 LCD
LCD for clockwise rotating
LCD for anti-clockwise rotating
LCD
Test lead
There is safety information on the back of the product.

Measurement of the direction of the rotating magnetic field
It is necessary to measure the direction of the rotating magnetic field in the way below:

Insert terminals L1, L2 and L3 of the test pen into the L1, L2 and L3 holes of UT261A, respectively.
Insert the other terminal of the test pen into the alligator clip.
Have the alligator clip accessed to the phases of the three power cables to be measured? After that, the LCDs of the product will automatically display the phase sequences of L1, L2 and L3.

Warning

Even if it is not connected with test leads L1, L2 and L3 but uncharged conductor N, there will be a rotation indicating symbol.
For more details, please refer to the panel information of UT261A

Specification

Environment

Maintenance

Attention: To avoid damage of UT261A:
- Only qualified technicians can repair or maintain UT261A.
- Make sure the calibration steps and performance test are proper and refer to proper maintenance information.
Attention: To avoid damage of UT261A:
- Do not corrosives or solvents because they may damage the shell of UT261A.
- Before cleaning UT261A, pull out the test leads.