1. Uvod
This manual provides detailed instructions for the safe and effective operation of the Mastfuyi FY02A Digital Multimeter. The FY02A is a compact, auto-ranging digital multimeter designed for measuring AC/DC voltage, AC/DC current, resistance, frequency, diode, and continuity. It also features Non-Contact Voltage (NCV) detection, a backlit LCD, data hold, and automatic power-off for energy conservation.
2. Varnostne informacije
WARNING: To avoid electric shock or personal injury, read and understand all safety information before using this product.
- Always ensure the multimeter is in the correct function and range before making measurements.
- Ne meri voltages exceeding the maximum rated input of 600V.
- Exercise extreme caution when working with live circuits.
- Inspect test leads for damage before each use. Do not use if insulation is compromised.
- Za natančne odčitke zamenjajte baterijo, ko se prikaže indikator nizke napolnjenosti baterije.
- Multimetra ne uporabljajte, če je videti poškodovan ali ne deluje pravilno.
- The internal circuit includes two fuses (F250mA/250V and F10A/250V) and two PTC thermistors for overload protection.
- The rubber sheath provides protection against electric shock during use.
3. Vsebina paketa
Preverite, ali so v paketu prisotni vsi elementi:
- 1 x Mastfuyi FY02A Digital Multimeter
- 2 x merilna kabla (rdeča in črna)
- 1 x 9V baterija
- 1 x uporabniški priročnik

Image: The Mastfuyi FY02A Digital Multimeter, including test leads and a 9V battery.
4. Izdelek je končanview
Familiarize yourself with the components and controls of the multimeter.

Image: Detailed diagram of the Mastfuyi FY02A multimeter, highlighting the LCD display, function dial, input jacks, and control buttons.
- LCD zaslon: Prikazuje odčitke meritev, enote in indikatorje funkcij.
- Številčnica funkcij: Used to select the desired measurement function (Voltage, Current, Resistance, etc.).
- Gumb HOLD: Freezes the current reading on the display. Press again to release.
- Gumb FUNC: Used to switch between AC/DC modes or other sub-functions within a dial setting.
- Gumb za osvetlitev ozadja: Activates the LCD backlight. Press and hold for 2 seconds to turn on; it automatically turns off after 15 seconds.
- Vhodni priključki:
- COM (skupni) priključek: Za črni merilni kabel.
- Vtičnica VΩmA: Za rdečo merilno vez pri merjenju volumnatage, resistance, frequency, diode, continuity, and current up to 200mA.
- 10A vtičnica: For the red test lead when measuring current up to 10A.
5. Nastavitev
5.1 Namestitev baterije
- Prepričajte se, da je multimeter izklopljen.
- Poiščite pokrov predalčka za baterije na zadnji strani enote.
- Odvijte pritrdilni vijak (vijake) in odstranite pokrov.
- Insert the 9V battery, observing correct polarity (+ and -).
- Replace the battery cover and secure it with the screw(s).
5.2 Priključitev merilnih vodnikov
- Črni testni kabel vstavite v COM (Navadni) priključek.
- Insert the red test lead into the appropriate input jack for your measurement:
- Za Voltage, Resistance, Frequency, Diode, Continuity, and mA current: use the VΩmA jack.
- For 10A current: use the 10A jack.
- Before use, remove the protective caps from the test lead tips.

Image: Illustration demonstrating the removal of protective caps from the test lead tips before use.
6. Navodila za uporabo
The Mastfuyi FY02A features auto-ranging, simplifying operation by automatically selecting the correct measurement range.
6.1 Merjenje AC/DC Voltage
- Gumb funkcij nastavite na V~ (AC Voltage) ali V- (DC Voltage) position. The multimeter will automatically detect AC or DC.
- Rdeči testni kabel vstavite v VΩmA jack and the black test lead into the COM jack.
- Merilne sonde priključite vzporedno na vezje ali komponento, ki jo želite izmeriti.
- Preberite zvtage vrednost na LCD zaslonu.

Image: A user demonstrating how to measure the voltage of a 9V battery using the multimeter's test leads.
6.2 Measuring AC/DC Current
- Gumb funkcij nastavite na A~ (AC tok) ali A- (enosmerni tok).
- For currents up to 200mA, insert the red test lead into the VΩmA jack. For currents up to 10A, insert the red test lead into the 10A jack. The black test lead always goes into the COM jack.
- OPOZORILO: Connect the multimeter in series with the circuit. Do not connect in parallel across a voltage source when measuring current, as this can damage the meter and circuit.
- Odčitajte trenutno vrednost na LCD zaslonu.
6.3 Merjenje upora
- Gumb funkcij nastavite na Ω (Odporni) položaj.
- Rdeči testni kabel vstavite v VΩmA jack and the black test lead into the COM jack.
- Pred merjenjem upornosti se prepričajte, da je vezje ali komponenta izklopljena iz napetosti.
- Merilne sonde priključite na komponento.
- Odčitajte vrednost upora na LCD-zaslonu.

Image: A user measuring the resistance of a component on a circuit board using the multimeter.
6.4 Preizkus kontinuitete
- Gumb funkcij nastavite na Ω (Upor) in pritisnite ZAPOSLENI button until the continuity symbol (a speaker icon) appears on the display.
- Rdeči testni kabel vstavite v VΩmA jack and the black test lead into the COM jack.
- Prepričajte se, da je tokokrog ali komponenta brez napetosti.
- Connect the test probes across the circuit path or component.
- If the resistance is less than approximately 100Ω, the buzzer will sound, indicating continuity.

Image: A user performing a continuity test, indicated by the multimeter's display and an audible alert.
6.5 Preskus diode
- Gumb funkcij nastavite na Ω (Upor) in pritisnite ZAPOSLENI button until the diode symbol appears on the display.
- Rdeči testni kabel vstavite v VΩmA jack and the black test lead into the COM jack.
- Ensure the diode is de-energized.
- Rdečo sondo priključite na anodo, črno pa na katodo diode. Na zaslonu se bo prikazala napetost naprej.tage padec.
- Reverse the probes. The display should show "OL" (Overload) for a good diode, indicating high resistance in the reverse direction. If "OL" is displayed in both directions or a value is shown in both directions, the diode may be faulty.

Image: A user performing a diode test, with the multimeter displaying "OL" for an open circuit in one direction.
6.6 brezkontaktna zvtage (NCV) zaznavanje
- Gumb funkcij nastavite na NCV položaj.
- Bring the top part of the multimeter close to the conductor.
- Če je voltage greater than 90V (RMS) is detected, the instrument's backlight will flash, and an audible alarm will sound.

Image: The multimeter detecting non-contact voltage near an electrical outlet, indicated by visual and audible alarms.
6.7 Zadrževanje podatkov
Pritisnite PRIDRŽI button to freeze the current reading on the display. This is useful for recording unstable measurements or when the display is difficult to view neposredno. Pritisnite PRIDRŽI ponovno pritisnite gumb, da sprostite odčitek in nadaljujete z meritvijo v živo.
6.8 Osvetlitev ozadja
Pritisnite in držite OZADJE button for 2 seconds to turn on the LCD backlight, improving visibility in dimly lit areas. The backlight will automatically turn off after 15 seconds to conserve battery power.
6.9 Samodejni izklop
The multimeter will automatically power off after approximately 15 minutes of inactivity to save battery life. To reactivate, turn the function dial to OFF and then back to the desired measurement function.
7. Vzdrževanje
7.1 Čiščenje
Obrišite ohišje z oglasomamp krpo in blagim detergentom. Ne uporabljajte abrazivnih sredstev ali topil. Pred uporabo se prepričajte, da je multimeter popolnoma suh.
7.2 Zamenjava baterije
Ko se na zaslonu prikaže indikator nizke napolnjenosti baterije, zamenjajte 9V baterijo, kot je opisano v poglavju 5.1. Uporaba nizke napolnjenosti baterije lahko povzroči netočne odčitke.
7.3 Zamenjava varovalke
If the current measurement function stops working, the fuse may need replacement. This should only be performed by qualified personnel. The internal fuses are F250mA/250V and F10A/250V.
8. Odpravljanje težav
- No Display / Power On Issue: Preverite namestitev baterije in jo napolnite. Po potrebi zamenjajte baterijo.
- "OL" Displayed:
- In resistance mode: Indicates an open circuit or resistance beyond the meter's range.
- In diode mode (reverse bias): Normal for a good diode.
- In current mode: Indicates current exceeding the selected range. Switch to a higher range (e.g., 10A jack) or check for an open circuit.
- Netočni odčitki:
- Preverite nivo baterije.
- Prepričajte se, da so merilne žice popolnoma vstavljene in nepoškodovane.
- Verify the correct function and range are selected.
- Brez piska za neprekinjeno delovanje: Ensure the continuity function is selected (speaker icon on display). Check if the circuit resistance is above 100Ω.
9. Specifikacije
| Parameter | Vrednost |
|---|---|
| Številka modela | FY02A |
| Zaslon | 2000 štetij, osvetljen LCD zaslon |
| Razpon | Samodejni razpon |
| DC Voltage | 200mV - 600V |
| AC Voltage | 2 V - 600 V |
| enosmerni tok | 200µA - 10A |
| Izmenični tok | 200µA - 10A |
| Odpornost | 200 Ω - 20 MΩ |
| Pogostost | 200 Hz - 200 kHz |
| Diodni test | ja |
| Test kontinuitete | Yes (Buzzer < 100Ω) |
| Zaznavanje NCV | Yes (>90V RMS) |
| Zadrževanje podatkov | ja |
| Samodejni izklop | Da (po 15 minutah) |
| Vir napajanja | 9V baterija |
| Dimenzije | 16.8 x 11.5 x 4.7 cm |
| Teža | 320 gramov |
| Varnostni standardi | CE, RoHS |
10. Garancija in podpora
Mastfuyi provides a 48-month unconditional warranty and lifetime after-sales service for this product. For technical support or warranty claims, please contact Mastfuyi customer service. Contact information can typically be found on the product packaging or the official Mastfuyi webmesto.
The manufacturer offers 24-hour consulting services for product-related questions.





