Uni-T UT261B Manual de Usario

Uni-T Equipo de medición UT261B

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I. Preface
Dear users ：
Congratulations on your purchase of UNI-T UT261B Phase Sequence and Motor Rotation Indicator. To
operate the instrument correctly, please read this Manual carefully and especially its “Safety Information”
before use.
After reading it, you are recommended to keep the manual properly. Please keep it with the instrument
together or place it in an accessible location for future use.
II. Overview
UT261B Phase Sequence and Motor Rotation Indicator (hereinafter referred to be as UT261B) is a
handheld battery powered instrument, widely used to identify phase orientation of three-phase industrial
equipments and motor rotation direction.
III. Unpacking Inspection
IV . Safety Information
Specifies the conditions and actions that may cause damage to UT261B.Caution:
Specifies the conditions and actions that may pose hazards to the User. Warning:
To prevent electric shocking or fire, it is necessary to comply with the following codes:
It is required to read through following safety instructions prior to operation or maintenance ；
Comply with local and national safety codes;
It is required to use personal protective equipments;
It is required to operate the instrument as per the instructions of manufacturer, or otherwise the safety
features/protective measures provided by the instrument may be affected;
Inspect the insulator of testing lead for damage or exposed metal; inspect testing lead for continuity
and replace the damaged testing lead.
Please take extreme caution when working with voltage higher than 30Vacrms, 42Vac Peak or 60Vdc,
for it may pose electric hazard.
Keep finger away from alligator clip contact and behind the finger protection device when using
alligator clip.
Adverse impact will be caused to the measurement by the impedance generated by the transient
current of extra operating circuit in parallel;
Please ensure the instrument operates normally prior to measuring dangerous voltage (30V ac rms,
42 V AC peak value or 60 V DC above)
Testing time should not exceed 10min when measuring the voltage 500V ~ 600V AC above;
Do not operate UT261B when removing any part;
Do not operate UT261B around explosive gas, steam or dust;
Do not operate UT261B in a wet place;
It is required to remove testing lead from the power and UT261B prior to replacing the battery.
V. Functional Description
5.1 Symbols
Following symbols are applied on UT261B or in the manual.
CAT III
Risk of electric shock
Warning
Dangerous voltage
Double or reinforced insulation
Grounding
AC or DC
Comply with European Union directives
Conforms to Overvoltage Category III, Pollution Degree 2 as per
IEC61010-1. CATIII refers to the degree of protection against the
transients and usually includes the equipments in fixed installations
(eg: electricity meter and primary overcurrent protection device).
5.2 Instrument Description
See the instrument indicator, button and jack as shown in Figure 1:
Graphical description
Phase input jack (U, V, W);
L1, L2, L3 phase indicators;
Clockwise rotation LED indicator;
Counter-clockwise rotation LED indicator;
Power switch
Motor location indicator
Power LED indicator
Instruction Table
Check the product for any crack or scratch. If any item is missing or damaged, please contact nearby
UNIT service center.
Standard items included in the shipment:
The Instrument-----------------------------1 pc
Operating Manual-------------------------1pc
Test Leads----------------------------------3pcs
Alligator Clips-------------------------------3pcs
Carrying Bag--------------------------------1pc
9V Battery------------------------------------1pc
Figure 1
5.3 Operating Instruction
5.3.1 Determine Phase Sequence (Contact Type)
5.3.2 Check Rotary Field (Motor Rotation, Non-Contact Type)
Note: This non-contact test is applicable for both
single-phase and three-phase motors. The
instrument will be unable to indicate accurately
with motors controlled by frequency converter,
its LED indicators can not work normally.
Figure 2
Figure 3
R LED indicator is on when the motor
otates clockwise.
5.4 Detect Magnetic Field
Place UT261B into solenoid valve, press “ON” button. If “Clockwise” (R) or “Counter-clockwise” (L) rotation
indicator illuminates, indicating magnetic field exists in the area.
Do not use corrosive or solution since those substances will cause damage to the chassis of UT261B.
Prior to cleaning, remove all testing leads from UT261B.
VI. Maintenance
Note
To prevent damage to UT261B:
Repairing or Maintaining UT261B can only be performed by qualified technicians.
Make sure you know clearly precise calibration procedures and function tests, and read enough
maintenance information．
Replacement and disposal of battery
Note, Warning
To prevent electric shocking, it is necessary to remove all testing leads from UT261B prior to replacing
replace the battery.
UT261B contains 9V/6F22 battery, do not discard the battery with other solid wastes and the used
battery should be handed over to the qualified waste collector or dangerous substance transporter for
proper treatment and disposal.
Please replace the battery as follows and see the Figure 3:
1. Remove all testing leads from UT261B.
2. Take off the protective casing.
3. Place UT261B with face down on the non-abrasive surface, and
screw out screws on the battery cover with proper screw driver.
4. Take off battery cover from UT261B and take out battery after
loosening the battery buckle.
5. Replace battery as per the method shown in the figure,
and watch out for the battery polarity.
6. Reinstall the battery cover with screws.
The manual information is subject to changes without prior notice!
**END**
a. Insert test leads (L1,L2,L3) into the corresponding input terminals of UT261B(U,V,W) respectively and
then connect them to alligator clips.
b. Then connect alligator clips in L1, L2 and L3 order to three phases of the system (eg: U,V and W terminals
of three-phase instrument).
c. Press down “ON” button, UT261B power indicator illuminates, release it, the button springs up automati
-cally and the indicator turns off. Therefore you need to press down “ON” button in order to begin the test.
When ON is pressed down, “Clockwise” (R) or “Counter-clockwise” (L) rotation indicator illuminates,
indicating three-phase system is under “Positive” or “Negative” phase sequence.
a. Remove all test leads away from UT261B;
b. Place UT261B towards the motor, in parallel with motor shaft. The bottom of the instrument should face the
shaft (namely, UT261B is located in a direction contrary to that of the motor). Refer to Figure 1 for motor
location indicator.
c. Press “ON” button, power indicator illuminates and the test begins. “Clockwise” (R) or “Counter-clockwise”
(L) rotation indicator illuminates, indicating the motor is rotating in a “clockwise” or “counter-clockwise”
direction.See Figure 2 for details.
Altitude
Pollution Degree
Mechanical
Safety
Compliances
Rating
test current
rotating
direction value
range
test current
III
P/N:110401104488X DATE:2018.06.26 REV.3

Especificaciones del producto

Marca: Uni-T
Categoría: Equipo de medición
Modelo: UT261B

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