Description

The UT22B-EU voltage tester is a simple to use tool for electricians and DIYers to measure AC/DC voltage. This voltage tester is IP54 rated, and designed to withstand a 2-meter drop. The great thing about this product is that it does not require any battery, its power is supplied by the voltage being tested! UT22B can automatically distinguish between AC and DC voltage, indicated by the number of LED lights.

Feature

 Certifications: CE, UKCA

•  Automatically detect AC/DC voltage
  

•  Automatically indicate DC polarity (+/-)
  

•  Hazardous voltage indicator when voltage >50V
  

•  Auto detection of AC/DC

•  Input protection
  

Specifications

How the input protection circuitry in the voltage tester is protected?

• Overcurrent Protection: When the input current exceeds the rated value of the fuse or current-limiting resistor, the fuse will blow or the current-limiting resistor will restrict the current, preventing damage to the tester from overcurrent.

• Overvoltage Protection: Clamping diodes and Transient Voltage Suppression (TVS) diodes can quickly conduct when the voltage exceeds a certain threshold, absorbing or diverting excess voltage energy to protect the internal circuitry from damage.

• Electrical Isolation: An isolation transformer can electrically isolate the input signal from the internal circuitry of the tester, preventing high voltage from directly entering the tester, causing damage or posing a threat to personal safety.

• Filtering: Capacitors can filter out high-frequency noise from the input signal, preventing this noise from interfering with the normal operation of the tester.

• Comprehensive Protection: Input protection circuits typically employ a combination of the above components and technologies, forming a multi-layered protection mechanism to ensure that the tester can operate safely under various adverse conditions.