UNI-T UT12B User Manual

UT12B

Voltage Detector

Double Insulated
Warning. Refer to the Operating Manual
Danger of electric shock
Conforms to Standards of European Union

This Operating Manual covers information on safety
and cautions. Read and understand all of the
instructions and safety information in this manual
before operating or servicing this tool. Failure to
understand how to safely operate this tool could
result in an accident causing serious injury or death.

Figure 1

Figure 2

Overview

UT12B is intended to check for the presence of
AC voltage, signaling the user with a beep and a
flashing LED.

Do not use the unit if it is wet, damaged or
cannot operate correctly.
Do not apply more than the rated voltage
between the probe tip and earth ground.
When the unit working at voltage over 30V in
AC, special care should be taken for there is
danger of electric shock.
Follow the local countries safety requirements
and standards.

Warning

This unit is only designed for the specialist
who has certain technical knowledge to use.
This unit is intended to check for the presence
of AC voltage, the voltage range is 90~1000V .
Make sure the tested inductor possible
voltage range before carrying out checking.
When you cannot sure the tested inductor
voltage range, the unit does not have any
response. It does not mean the tested inductor
does not have dangerous voltage, do not use
any part of the body to touch the tested
inductor.
When carrying out checking, keep your fingers
behind the probe tip finger guards.

Pollution Degree 2
Battery: 2 x 1.5V AAA

Operation

1)

2)

3)

4)

5)

Battery Indication

The LED will not flash when you turn the unit on or
during checking if the battery is less than 2V. The
beep sounds will still have but may be weaker.

Safety Information

This unit complies with the standards
EN61010-1, UL61010-1 and CASC 22.1
No. 61010-1 safety measurement requirement:
in pollution degree 2, overvoltage category
(CAT. IV 1000V)

Maintenance

1) Disconnect the unit from the circuit.

2) One hand holds the unit. Place another hand’s
thumb on the probe cap as the figure below

3) Pull back the back housing as the figure below

4) Replace the batteries (observe polarity).
2 x1.5V AAA

5) Push back the back housing.

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

International Electrical Symbols

Symbols used on the Meter and in this manual are
explained below:

CAT.IV: Primary supply level, overhead lines, cable
systems etc. Some examples include cables,

meters, transformers, and other exterior equipment
owned by the power utility.

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

Specifications

Indicators: LED and Beep
Voltage range: 90VAC ~ 1000VAC
Measurement Category IV 1000V per IEC61010
Temperature:

Ø Operating: -10~50
Ø Storage: 10~50

Humidity: 95%
Altitude: 2000m

Turn the unit on by pressing the power button
once, the unit beeps and LED flashes two times.
When the unit is under standby mode, the LED
keeps flashing two times in every 1.5 seconds.
Place the probe tip on or near the circuit or unit
to be tested. Beep and flashing LED indicate
the presence of voltage (90VAC to 1000VAC).
To turn off the beeper, you could press the
power button once after turning on the unit,
then you will hear a beep sound indicating the
beeper is off. After the beeper is off, only LED
will flash during checking. This way could save
battery.
Press power button to toggle between beeper
mode and silent mode. Beep two times enters
beeper mode, while beep one time enters silent
mode.
In order to save battery, the unit will auto power
off when it is not used for around 3 minutes.
The beeper sounds 2 times continuously and
then one long beep means the unit is power
off.
Press and hold the power button for two
seconds to turn the unit off, there will be one
second long beep.

Copyright 2007 Uni-Trend Group Limited.

All rights reserved.
Manufacturer:

Uni-Trend Technology (Dongguan) Limited
Dong Fang Da Dao
Bei Shan Dong Fang Industrial Development District
Hu Men Town, Dongguan City
Guang Dong Province
China
Postal Code: 523 925

Headquarters:
Uni-Trend Group Limited
Rm901, 9/F, Nanyang Plaza
57 Hung To Road
Kwun Tong
Kowloon, Hong Kong
Tel: [phone]
Fax: [phone]
Email: [e-mail]
http://www.uni-trend.com

This operating manual is subject to change
without notice.

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