Multimeter Unit UT120A CAT II with frequency measurement and diode test

The Unit UT120A CAT II handheld digital multimeter provides essential electrical measurement functions combined with frequency measurement and diode test capabilities. Designed for general-purpose troubleshooting, this compact meter measures AC/DC voltage, DC current and resistance, and displays frequency values for signals within its measurement range. Its diode test function allows verification of semiconductor components and basic circuit checks in workshops, field service, and home projects.

Advantages

The multimeter delivers clear numerical readouts and straightforward function selection for routine diagnostics. Its integrated frequency measurement expands the meter’s usefulness when working with signal sources and electronic modules, while the diode test simplifies component verification. The CAT II rating indicates suitability for measurements on single-phase mains-connected equipment and similar environments. Compact form and handheld operation make it convenient for portability and use in confined spaces.

Suitable for

• Measuring AC and DC voltage on household and workshop circuits
• Checking DC current and resistance in electronic devices and wiring
• Reading frequency of signals from power supplies, generators, or oscillators
• Performing diode and basic semiconductor checks during repairs
• Routine field service tasks and DIY electrical troubleshooting

Key specifications

• Measurement functions: AC/DC voltage, DC current, resistance, frequency, diode test
• Protection category: CAT II suitable for single-phase mains-connected equipment
• Display: digital numeric readout for measured values
• Portability: handheld design for on-site and workshop use
• User interface: rotary switch for function selection and test leads for probes

How to use

Before taking measurements, inspect the test leads and meter for visible damage. Select the required measurement function and range using the rotary switch or auto-range mode if available. Connect the test leads to the correct input terminals and make contact with the circuit or component to be tested. For voltage and frequency measurements, observe correct polarity and avoid contact with exposed conductors when measuring live circuits. For diode testing, place the probes across the diode to view forward voltage indication or an open circuit result. After finishing, switch the meter off and remove the test probes.

Usage recommendations

Use proper personal protective equipment and follow safe measurement practices when working near mains voltage. Verify the meter’s condition and fuse status before measuring current. Do not exceed the meter’s specified measurement ranges to prevent damage. Store the multimeter in a dry, dust-free environment and replace batteries according to the manufacturer’s guidance to ensure reliable operation.