UT12A - Mètre Uni-T - Free user manual and instructions

Product Type	Non-Contact AC Voltage Detector
Brand	Uni-T
Model	UT12A
Voltage Detection Range	90 VAC to 1000 VAC
Measurement Category	CAT IV 1000V
Indicators	Red LED and audible beep
Power Supply	2 x 1.5V AAA batteries
Operating Temperature	-10°C to 50°C
Storage Temperature	10°C to 50°C
Humidity	85% max
Altitude	2000m max
Pollution Degree	2
Safety Standards	EN61010-1, UL61010-1, CSA C22.2 No. 61010-1
Protection Class	Double insulation (Class II)
Dimensions (approx.)	145 x 20 x 15 mm
Weight (approx., without batteries)	35 g
Battery Low Indication	LED does not flash when battery <2V
Battery Replacement	Slide off back cover, replace AAA batteries
Cleaning	Damp cloth with mild detergent; no abrasives

Frequently Asked Questions - UT12A Uni-T

What is the Uni-T UT12A used for?

The Uni-T UT12A is a non-contact AC voltage detector used to check for the presence of AC voltage from 90V to 1000V. It alerts the user with a flashing red LED and an audible beep.

How do I turn on the UT12A?

Press and hold the power button. The red LED will light up to indicate the device is on. Release the button to turn it off.

What voltage range does the UT12A detect?

The detection range is 90 VAC to 1000 VAC. Always ensure the tested circuit is within this range before use.

What is the CAT IV 1000V rating?

CAT IV 1000V indicates the device is suitable for testing primary supply levels, such as overhead lines and cable systems, up to 1000V. It provides protection against high-energy transients.

How do I replace the batteries in the UT12A?

First, disconnect the unit from any circuit. Place your thumb on the probe cap, pull back the housing to open. Replace the two AAA batteries observing polarity. Slide the housing back into place.

What does it mean if the LED does not flash when I turn on the unit?

If the LED does not flash, the battery voltage is likely below 2V. Replace the batteries. The beep may still sound but can be weaker.

Is the UT12A safe to use on live circuits?

Yes, but only as specified. It is designed for contact/non-contact detection of AC voltage. Always keep fingers behind the probe tip finger guards and do not exceed the rated voltage.

Can the UT12A detect DC voltage?

No. The UT12A is designed solely for AC voltage detection. It will not respond to DC voltage.

How should I clean the UT12A?

Wipe the case with a damp cloth and mild detergent. Do not use abrasives or solvents, as they may damage the device.

What do the symbols on the UT12A mean?

The double square symbol indicates double insulation. The exclamation mark warns to refer to the manual. The lightning bolt signifies danger of electric shock. CE marks compliance with EU standards.

USER MANUAL UT12A Uni-T

Close-up of a hand using a pen to write on an electronic circuit board (no visible text or symbols)

Overview

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.

UT12A is intended to check for the presence of AC voltage, signaling the user with a beep and a flashing LED.

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)

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.

• 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 dange rous 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.

International Electrical Symbols

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

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

Specifications

● Indicators: LED and Beep
● Voltage range: 90VAC \~ 1000VAC
● Measurement Category IV 1000V per IEC61010
- Temperature:
* Operating: -10\~50°C * Storage: 10\~50°C
● Humidity: 95%
- Altitude: 2000m
- Pollution Degree 2
● Battery: 2 x 1.5V AAA

Operation

1) Turn the unit on by keep pressing and holding the power button, the red colour LED will light up.
2) 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).
3) Release the button to turn the unit off.

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.

Maintenance

Battery Replacement

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

Line drawing of two hands holding a pen or tool, with a hand pointing to the pen tip (no text or symbols present)

Figure 1

3) Pull back the back housing as the figure below

Illustration of hands holding a tool with an arrow indicating direction (no text or symbols)

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

Cleaning

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

\*END\*

This operating manual is subject to change without notice.

UNI-T®

UNI-TREND TECHNOLOGY (CHINA) CO., LTD.

No6, Gong Ye Bei 1st Road,
Songshan Lake National High-Tech Industrial Development Zone, Dongguan City
Development Zone, Dongguan City, Guangdong Province, China
Tel: [phone]
http://www.uni-trend.com

P/N:110401106713X

REV.2 Aug. 2019