1. Uvod i krajview
The UNI-T UT204PRO is a portable True RMS AC/DC clamp meter designed for accurate and reliable electrical measurements. This professional digital multimeter features a clear LCD display and offers a wide range of functions, making it suitable for use in laboratories, factories, and homes. It measures AC/DC current up to 600A, AC/DC voltage up to 600V, frequency, duty cycle, resistance, capacitance, and temperature. Additionally, it includes Non-Contact Voltage (NCV) detection, LIVE wire detection, and diode/continuity tests.
Ključne karakteristike uključuju:
- Pravo RMS mjerenje: Pruža tačna očitanja za nesinusoidne talasne oblike.
- Multifunkcionalnost: Measures AC/DC current, AC/DC voltage, frequency, duty cycle, resistance, capacitance, temperature, diode, and continuity.
- NCV and LIVE Detection: Enhances safety and ease of use for identifying live wires.
- Jasan LCD ekran: Features a backlight for visibility in low-light conditions.
- Usklađenost sa sigurnošću: Meets EN61010-1 CAT II 600V / CAT III 300V safety standards.
- Automatsko isključivanje: Štedi bateriju automatskim isključivanjem nakon 15 minuta neaktivnosti.
2. Sigurnosne informacije
Always adhere to safety precautions when using electrical testing equipment. Failure to do so may result in electric shock, injury, or damage to the meter. This device complies with EN61010-1 CAT II 600V / CAT III 300V safety standards. Ensure you understand and follow all instructions.
- Ne koristite mjerač ako izgleda oštećeno ili ako su mjerni kabeli oštećeni.
- Always ensure the function switch is set to the correct range before making measurements.
- Ne primjenjivati voltage ili struja koja prelazi maksimalne nazivne vrijednosti za brojilo.
- Budite izuzetno oprezni kada radite sa voltagiznad 30V AC RMS, 42V peak ili 60V DC, jer predstavljaju opasnost od strujnog udara.
- When measuring current, ensure the circuit is de-energized before connecting or disconnecting the clamp metar.
- Odmah zamijenite baterije kada se pojavi indikator niske napunjenosti baterije.
- Wear appropriate personal protective equipment (PPE), such as safety glasses and insulated gloves, when performing electrical measurements.
3. Komponente proizvoda
The UNI-T UT204PRO Clamp Meter is designed with user-friendly components for efficient operation.

Figure 3.1: Detailed diagram of the UNI-T UT204PRO Clamp Meter, highlighting its jaws, hand guard, LED indicator, function scale knob, function buttons, LCD display, COM input jack, and Signal input jack.
Ključne komponente uključuju:
- Clamp čeljusti: Koristi se za beskontaktno mjerenje AC/DC struje.
- Jaw Opening Trigger: Aktivira clamp čeljusti.
- Zaštita za ruke: Pruža zaštitu tokom rada.
- LED indikator: For NCV and LIVE detection.
- Function Scale Knob: Odabire željenu funkciju mjerenja.
- Funkcijska dugmad: Include SELECT, HOLD/LIGHT, MAX/MIN, REL/ZERO.
- LCD ekran: Shows measurement readings and function indicators.
- COM Input Jack (Black): Common terminal for test leads.
- Signal Input Jack (Red): Positive terminal for test leads.
- Kraj senzora NCV-a: Za beskontaktnu voltage detekcija.
4. Podešavanje
4.1 Instalacija baterije
The UNI-T UT204PRO requires two AAA batteries for operation. To install or replace batteries:
- Provjerite je li mjerač ISKLJUČEN.
- Pronađite poklopac odjeljka za baterije na stražnjoj strani mjerača.
- Upotrijebite odvijač da olabavite vijak na poklopcu baterije.
- Remove the cover and insert two AAA batteries, observing the correct polarity (+/-).
- Vratite poklopac baterije i čvrsto pritegnite zavrtanj.

Figure 4.1: The UNI-T UT204PRO Clamp Meter in use, demonstrating its NCV multi-segment display with sound and light alarm prompts, and LED backlight function for clear readings in low light.
4.2 Spajanje mjernog kabela
Za voltage, resistance, capacitance, continuity, and diode measurements, connect the test leads as follows:
- Umetnite crni test kabl u COM ulazni priključak.
- Insert the red test lead into the VΩHz+ input jack.
5. Uputstvo za upotrebu
Familiarize yourself with the function switch and buttons to perform various measurements.
5.1 AC/DC Current Measurement (600A)
Za mjerenje AC ili DC struje pomoću clamp čeljusti:
- Set the function switch to the '600A~' or '600A=' position.
- Press the jaw opening trigger to open the clamp čeljusti.
- Enclose a single conductor (not a power cord with multiple wires) with the clamp čeljusti.
- Očitajte trenutnu vrijednost na LCD zaslonu.

Figure 5.1: The UNI-T UT204PRO Clamp Meter in use, demonstrating AC/DC current measurement by clampoko jednog provodnika.
5.2 AC/DC Voltage Measurement (600V)
Za mjerenje AC ili DC voltage:
- Spojite mjerne kablove kao što je opisano u Odjeljku 4.2.
- Set the function switch to the 'V~' for AC voltage ili 'V=' za DC voltage položaj.
- Touch the test probes to the circuit points where you want to measure voltage.
- Pročitajte voltage vrijednost na LCD zaslonu.
Video 5.1: Demonstration of AC/DC voltage measurement using a UNI-T multimeter (UT890C model, similar operation).
5.3 Mjerenje otpora
Za mjerenje otpora:
- Spojite mjerne kablove kao što je opisano u Odjeljku 4.2.
- Postavite funkcijski prekidač u položaj 'Ω'.
- Dodirnite mjerne sonde preko komponente ili strujnog kola gdje želite izmjeriti otpor.
- Očitajte vrijednost otpora na LCD ekranu.
5.4 Mjerenje kapaciteta
Za mjerenje kapacitivnosti:
- Spojite mjerne kablove kao što je opisano u Odjeljku 4.2.
- Set the function switch to the 'F' position.
- Touch the test probes across the capacitor. Ensure the capacitor is discharged before testing.
- Pročitajte vrijednost kapacitivnosti na LCD zaslonu.
5.5 Mjerenje temperature
Za mjerenje temperature:
- Connect the K-type thermocouple to the input jacks (red to VΩHz+, black to COM).
- Set the function switch to the '°C/°F' position.
- Place the thermocouple probe on or in the object whose temperature you wish to measure.
- Read the temperature value on the LCD display. Use the SELECT button to switch between Celsius and Fahrenheit.

Figure 5.2: The UNI-T UT204PRO Clamp Meter measuring temperature using the included K-type thermocouple.
5.6 Test kontinuiteta
To test for circuit continuity:
- Spojite mjerne kablove kao što je opisano u Odjeljku 4.2.
- Set the function switch to the 'Continuity' position (often shared with resistance or diode).
- Touch the test probes to the two points of the circuit you want to test.
- Ako postoji kontinuitet (nizak otpor), mjerač će emitirati zvučni signal.
5.7 Ispitivanje diode
Za testiranje diode:
- Spojite mjerne kablove kao što je opisano u Odjeljku 4.2.
- Set the function switch to the 'Diode' position (often shared with resistance or continuity).
- Touch the red test probe to the anode of the diode and the black test probe to the cathode.
- Na ekranu će se prikazati jačina zvuka naprijedtagpad e. Zamijenite mjesta sondama; ekran bi trebao prikazivati 'OL' (otvorena petlja) za ispravnu diodu.
Video 5.2: Demonstration of resistance, continuity, and capacitance measurements using a UNI-T multimeter (UT890C model, similar operation).
5.8 NCV (Beskontaktni volumentage) Otkrivanje
Za detekciju jačine zvuka naizmjenične strujetage bez kontakta:
- Set the function switch to the 'NCV' position.
- Bring the NCV sensing end of the meter close to the conductor or outlet.
- Mjerač će pokazivati prisustvo AC voltažetage through audible beeps and visual alerts on the LCD.
Video 5.3: Demonstration of DC current measurement using a clamp meter (related product, similar operation).
5.9 LIVE Wire Detection
To identify live wires:
- Set the function switch to the 'LIVE' position.
- Touch the red test probe to the conductor.
- The meter will indicate a live wire with an audible alarm and visual display.

Figure 5.3: The UNI-T UT204PRO Clamp Meter performing Live/Neutral Wire Measurement, indicating the presence of a live conductor.
5.10 Funkcija True RMS
The True RMS (Root Mean Square) function ensures accurate measurement of AC voltage and current, especially for non-sinusoidal waveforms often found in modern electronic devices. This provides a more precise reading compared to average-responding meters.

Figure 5.4: Comparison illustrating the accuracy of True RMS measurement for various current waveforms against ordinary measurement methods.
5.11 Dodatne funkcije
- HOLD/Light Button: Press briefly to hold the current reading on the display. Long press to activate/deactivate the backlight.
- Dugme MAX/MIN: Press to display the maximum or minimum measured value.
- REL/ZERO Button: Used for relative measurement or to zero out the display for DC current measurements.
- Automatsko isključivanje: The meter automatically turns off after approximately 15 minutes of inactivity to save battery life.
6. Održavanje
Proper maintenance ensures the longevity and accuracy of your UNI-T UT204PRO Clamp Metar.
- čišćenje: Wipe the meter with a soft, damp tkanina. Nemojte koristiti abrazivna sredstva ili rastvarače.
- Zamjena baterije: Replace batteries as soon as the low battery indicator appears to ensure accurate readings. Refer to Section 4.1 for instructions.
- Skladištenje: Ako se mjerač ne koristi duži period, izvadite baterije kako biste spriječili curenje. Čuvajte na hladnom i suhom mjestu.
- Test kablovi: Regularly inspect test leads for any damage to insulation or connectors. Replace immediately if damaged.
7. Otkrivanje problema
If you encounter issues with your UNI-T UT204PRO, refer to the following common troubleshooting steps:
- Nema prikaza/Uključivanje: Provjerite jesu li baterije ispravno postavljene i uvjerite se da nisu ispražnjene. Zamijenite ih ako je potrebno.
- Netačna očitanja: Verify that the function switch is set to the correct measurement type and range. Ensure test leads are properly connected and not damaged.
- 'OL' na ekranu: This usually indicates an over-range condition (measurement exceeds the meter's maximum range) or an open circuit (for resistance/continuity).
- Nema zvučnog signala kontinuiteta: Check if the circuit is truly continuous and if the resistance is within the audible range (typically below 50Ω).
For persistent issues, contact Uni-T customer support.
8. Specifikacije
Below are the technical specifications for the UNI-T UT204PRO Clamp metar:
| Specifikacija | Vrijednost |
|---|---|
| Brand | Uni-T |
| Broj modela | UT204PRO |
| Raspon izmjenične struje | 600A |
| Raspon istosmjerne struje | 600A |
| AC Voltage domet | 600V |
| DC Voltage domet | 600V |
| Mjerenje otpora | Da |
| Mjerenje kapacitivnosti | Up to 60 mF |
| Merenje temperature | Yes (K-type thermocouple included) |
| NCV detekcija | Da |
| LIVE Wire Detection | Da |
| True RMS | Da |
| Prikaz broja | 6000 |
| Izvor napajanja | 2x AAA baterije (uključene) |
| Automatsko isključivanje | Nakon 15 minuta |
| Sigurnosni standardi | EN61010-1 CAT II 600V / CAT III 300V |
| Dimenzije | 24.9 x 9.1 x 5.6 cm |
| Težina | 410 g |
9. Garancija i podrška
For warranty information, technical support, or service inquiries, please refer to the contact details provided in the product packaging or visit the official Uni-T webSačuvajte račun kao dokaz o kupovini za reklamacije u slučaju reklamacije.





