1. Sarrera
This manual provides essential information for the safe and effective operation of your Mastech MY70 Digital Multimeter. Please read this manual thoroughly before use and retain it for future reference. The Mastech MY70 is a compact, battery-powered digital multimeter designed for measuring AC/DC voltage, AC/DC current, resistance, diode, and transistor hFE. It is suitable for domestic, industrial, and electronics applications.

1. irudia: Aurrealdea view of the Mastech MY70 Digital Multimeter.
2. Segurtasun informazioa
WARNING: To avoid electric shock or personal injury, and to avoid damage to the meter or to the equipment under test, follow these safety rules:
- Ez aplikatu bolumen baloratua baino gehiagotage, neurgailuan markatuta dagoen moduan, terminalen artean edo edozein terminal eta lur-lurraren artean.
- Kontuz ibili voltag30V AC RMS, 42V peak edo 60V DC-tik gorakoak. Bolumen horitagshock arriskua dakar.
- Funtzioak edo tarteak aldatu aurretik, deskonektatu beti proba-kableak zirkuitutik.
- Ziurtatu proba-kableak egoera onean daudela, isolamenduari kalterik egin gabe.
- Ez erabili neurgailua hondatuta dagoela dirudi edo kaxa irekita badago.
- Always use the proper terminals, function, and range for your measurements.
- Irakurketa zehatzak bermatzeko, aldatu bateria bateria baxuaren adierazlea agertzen den bezain laster.
3. Paketearen edukia
Egiaztatu behean zerrendatutako elementu guztiak zure paketean sartuta daudela:
- Mastech MY70 Digital Multimeter (approx. 188x93x50mm, 380g/0.84lb)
- Proba-kableak (bat gorri, bestea beltz)
- Multi-function Socket
- 1 x 9V 6F22 bateria
- Kalibrazio Ziurtagiria
- Hasierako gida azkarra

Figure 2: Mastech MY70 Multimeter, test leads, multi-function socket, battery, and documentation. This image also illustrates the main applications of the multimeter in domestic, industrial, and electronics settings.
4. Konfigurazioa
4.1 Bateriaren instalazioa
- Ziurtatu multimetroa itzalita dagoela eta proba-kableak deskonektatuta daudela.
- Bilatu bateriaren konpartimentuaren estalkia multimetroaren atzealdean.
- Kendu euskarri-torlojua(k) eta kendu estalkia.
- Insert the 9V 6F22 battery, observing the correct polarity (+ and -).
- Jarri berriro bateriaren konpartimentuaren estalkia eta finkatu torloju(ekin) erabiliz.
4.2 Proba-kableak konektatzea
- Neurketa gehienetarako (bolumentage, resistance, continuity, diode, hFE), insert the black test lead into the "COM" (common) jack.
- Sartu proba-kable gorria "VΩmA" konektorean.
- For current measurements exceeding 200mA (up to 10A), insert the red test lead into the "10A" jack.
5. Funtzionamendu-argibideak
The Mastech MY70 features a rotary switch for function selection and a digital display for readings.
5.1 Funtzio hautaketa
Turn the rotary switch to the desired measurement function (e.g., DCV, ACV, DCA, ACA, Ω, Diode, hFE). The meter will automatically select the appropriate range for most measurements (auto-ranging), or you may need to manually select a range depending on the model variant.
5.2 Neurketak hartzea
- DC bolumenatage (DCV): Select the DCV function. Connect the test leads in parallel with the DC voltage iturria.
- AC Boltage (ACV): Select the ACV function. Connect the test leads in parallel with the AC voltage iturria.
- Korronte zuzena (DCA): Select the DCA function. Connect the meter in series with the circuit. Ensure the red lead is in the correct current jack (mA or 10A).
- AC Current (ACA): Select the ACA function. Connect the meter in series with the circuit. Ensure the red lead is in the correct current jack (mA or 10A).
- Erresistentzia (Ω): Select the Ω function. Ensure the circuit is de-energized. Connect the test leads across the component to measure resistance.
- Diodo proba: Select the Diode function. Connect the red lead to the anode and the black lead to the cathode of the diode. The forward voltage drop bistaratuko da.
- Jarraitasun proba: Select the Continuity function. Connect the test leads across the circuit or component. A buzzer will sound if continuity is detected (resistance less than 50Ω).
- Transistor hFE Test: Insert the transistor into the multi-function socket, ensuring correct pin orientation (EBC for NPN or PNP). Select the hFE function. The hFE value will be displayed.
5.3 Ezaugarri bereziak
- Datuak gordetzea: Sakatu "HOLD" botoia pantailan uneko irakurketa izozteko. Sakatu berriro askatzeko.
- Itzali automatikoa: The meter will automatically power off after a period of inactivity to conserve battery life.
- Bateria baxuaren bistaratzea: An icon will appear on the display when the battery voltage is low, indicating that the battery needs replacement.
6. Mantentzea
6.1 Bateria ordezkatzea
When the low battery indicator appears on the display, replace the 9V 6F22 battery as described in Section 4.1. Using a low battery can lead to inaccurate readings.
6.2 Garbiketa
Garbitu kasua iragarkiarekinamp oihal eta detergente leun batekin. Ez erabili urratzailerik edo disolbatzailerik. Mantendu terminalak zikinkeriarik eta hezetasunetik libre.
6.3 Biltegiratzea
If the meter is not to be used for an extended period, remove the battery to prevent leakage and damage to the meter.
7. Arazoak
- Ez dago pantailarik edo pantaila ahula: Egiaztatu bateriaren instalazioa eta ordeztu behar izanez gero.
- Irakurketa okerrak: Ensure correct function and range selection. Check test lead connections and condition. Verify battery level.
- "OL" (Gainezka) bistaratzen da: The measured value exceeds the selected range. Switch to a higher range or a different function if applicable.
- Jarraitutasun-txirrinik ez: Check if the resistance is above 50Ω. Ensure test leads are properly connected.
8. Zehaztapenak
The following table details the technical specifications of the Mastech MY70 Digital Multimeter:

Figure 3: Detailed specifications for the Mastech MY70, including ranges, resolutions, and accuracies for various measurement functions.
| Parametroa | Balioa |
|---|---|
| Bistaratzea | 2000 zenbaketa |
| Itzali automatikoa | Bai |
| Datuak gordetzea | Bai |
| Bateria baxuko pantaila | Bai |
| Transistorea hFE | 0~1000 |
| Diodo Ireki Bolumenatage | 3.0V |
| Jarraitutasun zalaparta | <50Ω |
| Fabrikatzailea | MASTECH |
| Modelo zenbakia | YQ-MY70 |
| Elementuaren pisua | 1 kg |
| Produktuaren neurriak | 20 x 15 x 25 cm |
| Pilak | 2 LR44 batteries (included) - Note: Package contents list 1x9V 6F22 battery. Please verify upon receipt. |
| Materiala | Akrilonitrila Butadiene estirioa |
| Energia iturri mota | Bateriaren bidez |
| Neurketaren Zehaztasuna | %0.4 (ohikoa) |
| Ziurtagiriak | CE, RoHS, UL |
| Jatorrizko Herrialdea | Taiwan |
| Goiko Tenperaturaren Balorazioa | 50 gradu Celsius |
For a comparison of features across different Mastech digital multimeters, refer to the following table:

Figure 4: Feature comparison table for various Mastech digital multimeters, including the MY70 model.
9. Bermea eta Laguntza
For information regarding warranty coverage, technical support, or service, please refer to the official Mastech webwebgunera edo jarri harremanetan zure tokiko banatzailearekin. Gorde erosketa-agiria erosketaren frogagiri gisa.





