Manwal tal-Istruzzjonijiet tal-Multimetru Diġitali MASTECH MY74

1. Introduzzjoni

This manual provides detailed instructions for the safe and effective operation of your MASTECH MY74 Digital Multimeter. Please read this manual thoroughly before using the device and retain it for future reference. The MY74 is a compact, handheld digital multimeter designed for measuring AC/DC voltage, AC/DC current, resistance, capacitance, frequency, temperature, diode, continuity, and transistor hFE.

2. Informazzjoni dwar is-Sigurtà

WARNING: To avoid electric shock or personal injury, read and understand all safety information before using this multimeter.

• Always ensure the multimeter is in good working condition and free from damage.
• Applikax aktar mill-vol nominalitage, kif immarkat fuq il-meter, bejn it-terminals jew bejn kwalunkwe terminal u ground ground.
• Oqgħod attent meta taħdem bil-voltag'il fuq minn 30V AC RMS, 42V peak, jew 60V DC. Dawn il-volumitages joħolqu periklu ta' xokk.
• Dejjem skonnettja l-wajers tat-test miċ-ċirkwit qabel ma tbiddel il-funzjonijiet.
• Tużax il-miter jekk l-għatu tal-batterija ma jkunx magħluq sew.
• Ibdel il-batterija hekk kif jidher l-indikatur tal-batterija baxxa.
• Adhere to the measurement category (CAT III 600V) for safe operation.

3. Prodott Aktarview

The MASTECH MY74 Digital Multimeter features a clear display, a rotary function switch, and input jacks for test leads. Familiarize yourself with the components shown below.

Il-komponenti ewlenin jinkludu:

• Display LCD: Juri l-qari tal-kejl, l-unitajiet, u l-indikaturi tal-funzjoni.
• Swiċċ tal-Funzjoni Rotatorja: Jagħżel il-funzjoni tal-kejl mixtieqa.
• Buttuna ON/OFF: Jixgħel jew jitfi l-apparat.
• Buttuna ŻOMM: Jiffriża l-qari attwali tal-wiri.
• Ġakkijiet tad-dħul:
  • COM: Terminal komuni għall-kejl kollu.
  • VΩHz: Input għal voltagKejl ta' e, reżistenza, frekwenza, kapaċitanza, dijodu, u kontinwità.
  • mAµA: Input għal milliampere u mikroampkejl tal-kurrent ere.
  • 10A: Input għal 10 Ampkejl tal-kurrent ere.

4. Karatteristiċi

The MASTECH MY74 Digital Multimeter offers the following key features:

• Wiri: 2000 għadd
• Funzjoni Auto Power Off
• Transistor hFE measurement (0~1000)
• Diode Open Voltage: 3.0V
• Continuity Buzzer: Activates below 50Ω
• Funzjoni ta' Żomm tad-Data
• Low Battery Display indicator

5. Setup

5.1 Installazzjoni tal-batterija

The MASTECH MY74 requires 2 LR44 batteries (included). To install or replace batteries:

1. Kun żgur li l-multimetru jkun mitfi u skonnettja l-wajers tat-test kollha.
2. Sib il-kompartiment tal-batterija fuq wara tal-miter.
3. Ħoll il-qoxra tal-kompartiment tal-batterija.
4. Daħħal il-batteriji, waqt li tosserva l-polarità korretta (+ u -).
5. Ibdel l-għatu tal-kompartiment tal-batterija u waħħalha bil-kamin.

5.2 Konnessjoni tal-wajers tat-test

Always connect the black test lead to the COM jack. Connect the red test lead to the appropriate input jack based on the measurement function:

• VΩHz: Għal voltage, resistance, frequency, capacitance, diode, and continuity.
• mAµA: Għal kejl tal-kurrent sa 200mA.
• 10A: Għal kejl tal-kurrent sa 10A.

6. Istruzzjonijiet Operattivi

Qabel ma tieħu xi kejl, kun żgur li l-wajers tat-test huma konnessi sew u li s-swiċċ rotatorju huwa ssettjat għall-funzjoni mixtieqa.

6.1 DC VoltagKejl tal-e (V–)

1. Connect the red test lead to the VΩHz jack and the black test lead to the COM jack.
2. Issettja s-swiċċ rotatorju għall-Volum DC mixtieqtagfirxa e (eż., 200mV, 2V, 20V, 200V, 600V).
3. Qabbad il-wajers tat-test b'mod parallel maċ-ċirkwit jew il-komponent li qed jiġi ttestjat.
4. Aqra l-voltagIl-valur fuq il-wiri.

6.2 AC VoltagKejl tal-e (V∼)

1. Connect the red test lead to the VΩHz jack and the black test lead to the COM jack.
2. Issettja s-swiċċ rotatorju għall-Volum AC mixtieqtagfirxa e (eż., 2V, 20V, 200V, 750V).
3. Connect the test leads in parallel to the AC circuit or component.
4. Aqra l-voltagIl-valur fuq il-wiri.

6.3 Kejl tal-Kurrent DC (A–)

ATTENZJONI: Qatt ma tqabbad il-multimetru b'mod parallel ma' voltagsors elettroniku meta tkejjel il-kurrent. Dan jista’ jaħraq il-fjus jew jagħmel ħsara lill-miter.

1. Qabbad iċ-ċomb iswed tat-test mal-jack COM.
2. For currents up to 200mA, connect the red test lead to the mAµA jack. For currents up to 10A, connect the red test lead to the 10A jack.
3. Set the rotary switch to the appropriate DC Current range (e.g., 2mA, 20mA, 200mA, 10A).
4. Iftaħ iċ-ċirkwit u qabbad il-multimetru f'serje mat-tagħbija.
5. Aqra l-valur attwali fuq id-displej.

6.4 Kejl tal-Kurrent AC (A∼)

ATTENZJONI: Qatt ma tqabbad il-multimetru b'mod parallel ma' voltagsors elettroniku meta tkejjel il-kurrent. Dan jista’ jaħraq il-fjus jew jagħmel ħsara lill-miter.

1. Qabbad iċ-ċomb iswed tat-test mal-jack COM.
2. For currents up to 200mA, connect the red test lead to the mAµA jack. For currents up to 10A, connect the red test lead to the 10A jack.
3. Set the rotary switch to the appropriate AC Current range (e.g., 2mA, 20mA, 200mA, 10A).
4. Iftaħ iċ-ċirkwit u qabbad il-multimetru f'serje mat-tagħbija.
5. Aqra l-valur attwali fuq id-displej.

6.5 Resistance Measurement (Ω)

ATTENZJONI: Kun żgur li ċ-ċirkwit ma jkollux l-enerġija u li l-kapaċitaturi kollha jkunu skarikati qabel ma tkejjel ir-reżistenza.

1. Connect the red test lead to the VΩHz jack and the black test lead to the COM jack.
2. Set the rotary switch to the desired Resistance range (e.g., 200Ω, 2kΩ, 20kΩ, 200kΩ, 2MΩ, 200MΩ).
3. Qabbad il-wajers tat-test mal-komponent li għandu jitkejjel.
4. Aqra l-valur tar-reżistenza fuq il-wiri.

6.6 Test tad-Dijodi (→|–)

1. Connect the red test lead to the VΩHz jack and the black test lead to the COM jack.
2. Issettja s-swiċċ rotatorju għall-pożizzjoni tat-Test tad-Diode.
3. Qabbad il-wajer tat-test aħmar mal-anodu u l-wajer tat-test iswed mal-katodu tad-dijodu.
4. Id-displej se juri l-volum 'il quddiemtage drop. Reverse the leads; the display should show "OL" (Open Loop) for a good diode.

6.7 Test tal-Kontinwità (♫)

1. Connect the red test lead to the VΩHz jack and the black test lead to the COM jack.
2. Issettja s-swiċċ rotatorju għall-pożizzjoni tat-Test tal-Kontinwità.
3. Qabbad il-wajers tat-test madwar iċ-ċirkwit jew il-komponent.
4. If the resistance is less than approximately 50Ω, the buzzer will sound, indicating continuity.

6.8 Transistor hFE Test

1. Issettja l-iswiċċ li jdur fil-pożizzjoni hFE.
2. Insert the transistor's Emitter, Base, and Collector leads into the corresponding holes in the multi-function socket (NPN or PNP).
3. Read the hFE value on the display.

6.9 Kejl tal-Kapaċità (F)

CAUTION: Ensure the capacitor is fully discharged before measuring capacitance to avoid damage to the meter.

1. Connect the red test lead to the VΩHz jack and the black test lead to the COM jack.
2. Set the rotary switch to the Capacitance range (e.g., 2nF, 20nF, 200nF, 2µF, 20µF, 100µF).
3. Qabbad il-wajers tat-test mal-kapaċitatur.
4. Aqra l-valur tal-kapaċitanza fuq il-wirja.

6.10 Kejl tal-Frekwenza (Hz)

1. Connect the red test lead to the VΩHz jack and the black test lead to the COM jack.
2. Set the rotary switch to the Frequency range (20kHz).
3. Connect the test leads in parallel to the signal source.
4. Aqra l-valur tal-frekwenza fuq id-displej.

6.11 Kejl tat-Temperatura (°C/°F)

1. Connect the K-type thermocouple to the VΩHz and COM jacks, observing polarity.
2. Set the rotary switch to the Temperature range.
3. Poġġi s-sonda tat-termokoppja fil-punt fejn trid titkejjel it-temperatura.
4. Aqra l-valur tat-temperatura fuq id-displej.

7. Manutenzjoni

7.1 Tindif

Imsaħ il-każ bl-adamp drapp u deterġent ħafif. Tużax abrażivi jew solventi. Kun żgur li l-miter ikun niexef għalkollox qabel l-użu.

7.2 Sostituzzjoni tal-batterija

Refer to section 5.1 for battery replacement instructions. Replace batteries promptly when the low battery indicator appears to ensure accurate readings.

7.3 Sostituzzjoni tal-Fjus

Jekk il-funzjoni tal-kejl tal-kurrent tfalli, il-fjus jista' jkollu bżonn jinbidel. Irreferi għall-ispeċifikazzjonijiet għat-tip u l-klassifikazzjoni korretti tal-fjus. Is-sostituzzjoni tal-fjus għandha titwettaq biss minn persunal kwalifikat.

8 Issolvi l-problemi

9. Speċifikazzjonijiet

The following table details the technical specifications for the MASTECH MY74 Digital Multimeter.

Note: Accuracy specifications are given for one year after calibration, at 18°C to 28°C (64°F to 82°F), with relative humidity up to 75%.

10. Garanzija u Appoġġ

MASTECH products are designed for reliability and performance. For warranty information and technical support, please refer to the documentation included with your purchase or visit the official MASTECH website. The EU Spare Part Availability Duration is 1 year.