MASTECH MY75 Digital Multimeter User Manual

1. Introduzzjoni

Thank you for choosing the MASTECH MY75 Digital Multimeter. This device is a professional, handheld instrument designed for accurate measurement of AC/DC voltage, AC/DC current, resistance, capacitance, frequency, diode, continuity, and transistor hFE. Please read this manual thoroughly before use to ensure safe and proper operation.

1.1 Informazzjoni dwar is-Sigurtà

Dejjem segwi l-prekawzjonijiet ta' sigurtà meta tuża kwalunkwe tagħmir għall-ittestjar elettriku. Jekk tonqos milli tagħmel dan, tista' tikkawża korriment jew ħsara lill-miter jew lit-tagħmir li jkun qed jiġi ttestjat.

• Teċċedix il-valuri massimi tad-dħul speċifikati għal kull firxa.
• Oqgħod attent ħafna meta taħdem bil-voltages fuq 60V DC jew 30V AC RMS.
• Kun żgur li l-wajers tat-test huma f'kundizzjoni tajba u konnessi sew.
• Tħaddimx il-miter jekk jidher li għandu l-ħsara jew jekk il-kaxxa tkun miftuħa.
• Ibdel il-batteriji meta jidher l-indikatur ta' batterija baxxa biex tiżgura qari preċiż.
• This meter is rated CAT III 600V.

2. Prodott Aktarview

The MASTECH MY75 is a compact and versatile digital multimeter suitable for domestic, industrial, and electronics applications.

Figura 2.1: Quddiem view of the MASTECH MY75 Digital Multimeter, showing the LCD display, rotary switch, function buttons, and input jacks.

2.1 Komponenti Ewlenin

• Display LCD: 20000 counts display for clear readings.
• Swiċċ li jdur: Użat biex jagħżel il-funzjonijiet u l-firxiet tal-kejl.
• Buttuni tal-Funzjoni: Includes ON/OFF, HOLD, and other specific function buttons.
• Ġakkijiet tad-dħul: Terminals for connecting test leads (COM, VΩHz, 10A, mA/µA/hFE).

Figura 2.2: Aktarview of MY75 features, main applications (domestic, industrial, electronics), and package contents.

3. Setup

3.1 Kontenut tal-Pakkett

Before starting, verify that all items are present in the package:

• Multimetru Diġitali MASTECH MY75
• Wavel tat-Test (Aħmar u Iswed)
• Multi-function Socket (for hFE testing)
• 2 x LR44 Batteries (pre-installed or included separately)
• Gwida għall-Bidu Quick
• Ċertifikat ta 'Kalibrazzjoni

Figure 3.1: The MASTECH MY75 Multimeter shown with its retail packaging and included accessories.

Figure 3.2: The MASTECH MY75 Multimeter with its essential accessories: test leads, LR44 batteries, and the multi-function hFE socket.

3.2 Installazzjoni tal-batterija

The MASTECH MY75 uses 2 LR44 batteries. If the low battery indicator appears on the display, replace the batteries immediately to maintain measurement accuracy.

1. Itfi l-multimetru u skonnettja l-wajers tat-test kollha.
2. Sib l-għatu tal-kompartiment tal-batterija fuq wara tal-unità.
3. Ħoll il-vit(i) taż-żamma u neħħi l-għatu.
4. Remove the old batteries and insert new LR44 batteries, observing correct polarity.
5. Erġa’ poġġi l-għatu tal-kompartiment tal-batterija u waħħalha bil-vit(i).

3.3 Konnessjoni tal-wajers tat-test

Always connect the black test lead to the "COM" (Common) 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 measurements.
• mA/µA/hFE: Għal milliampere/mikroampere current measurements and transistor hFE testing.
• 10A: For high current (up to 10A) measurements.

4. Istruzzjonijiet Operattivi

To operate the multimeter, turn the rotary switch to the desired function. The meter features auto-ranging for most functions, simplifying operation.

4.1 DC VoltagKejl tal-e (V=)

1. Qabbad il-wajer tat-test iswed mal-jack COM u l-wajer tat-test aħmar mal-jack VΩHz.
2. Turn the rotary switch to the "V=" position.
3. Connect the test leads across the DC voltagsors li għandu jitkejjel.
4. Aqra l-voltagIl-valur fuq il-wiri.

4.2 AC VoltagKejl tal-e (V~)

1. Qabbad il-wajer tat-test iswed mal-jack COM u l-wajer tat-test aħmar mal-jack VΩHz.
2. Turn the rotary switch to the "V~" position.
3. Qabbad il-wajers tat-test mal-vultaġġ ACtagsors li għandu jitkejjel.
4. Aqra l-voltagIl-valur fuq il-wiri.

4.3 DC Current Measurement (A= / mA= / µA=)

1. Itfi l-enerġija għaċ-ċirkwit.
2. Qabbad iċ-ċomb iswed tat-test mal-jack COM.
3. For currents up to 200mA, connect the red test lead to the mA/µA/hFE jack. For currents up to 10A, connect the red test lead to the 10A jack.
4. Turn the rotary switch to the appropriate "A=", "mA=", or "µA=" position.
5. Ikteb iċ-ċirkwit u qabbad il-miter f'serje mat-tagħbija.
6. Applika l-enerġija liċ-ċirkwit u aqra l-valur tal-kurrent.

4.4 AC Current Measurement (A~ / mA~ / µA~)

1. Follow the same steps as DC Current Measurement, but select the appropriate "A~", "mA~", or "µA~" position on the rotary switch.

4.5 Kejl tar-Reżistenza (Ω)

1. Kun żgur li ċ-ċirkwit ma jkollux l-enerġija u li l-kapaċitaturi kollha jkunu skarikati.
2. Qabbad il-wajer tat-test iswed mal-jack COM u l-wajer tat-test aħmar mal-jack VΩHz.
3. Dawwar is-swiċċ rotatorju għall-pożizzjoni "Ω".
4. Qabbad il-wajers tat-test mal-komponent li għandu jitkejjel.
5. Aqra l-valur tar-reżistenza fuq il-wiri.

4.6 Kejl tal-Kapaċità (F)

1. Kun żgur li l-kapaċitatur ikun skarikat kompletament qabel il-kejl.
2. Qabbad il-wajer tat-test iswed mal-jack COM u l-wajer tat-test aħmar mal-jack VΩHz.
3. Turn the rotary switch to the "F" position.
4. Qabbad il-wajers tat-test mat-terminals tal-kapaċitatur.
5. Aqra l-valur tal-kapaċitanza fuq il-wirja.

4.7 Kejl tal-Frekwenza (Hz)

1. Qabbad il-wajer tat-test iswed mal-jack COM u l-wajer tat-test aħmar mal-jack VΩHz.
2. Turn the rotary switch to the "Hz" position.
3. Qabbad il-wajers tat-test mas-sors tas-sinjal.
4. Aqra l-valur tal-frekwenza fuq id-displej.

4.8 Test tad-Dijodi (→|)

1. Kun żgur li ċ-ċirkwit ma jkollux l-enerġija.
2. Qabbad il-wajer tat-test iswed mal-jack COM u l-wajer tat-test aħmar mal-jack VΩHz.
3. Dawwar is-swiċċ rotatorju għall-pożizzjoni tas-simbolu tad-Dijodu.
4. Qabbad il-wajer aħmar mal-anodu u l-wajer iswed mal-katodu tad-dijodu. Volum 'il quddiemtage drop will be displayed (Diode Open Voltage 3.0V).
5. Dawwar il-wajers. Id-displej għandu juri "OL" (Open Loop) għal dijodu tajjeb.

4.9 Test tal-Kontinwità ())))

1. Kun żgur li ċ-ċirkwit ma jkollux l-enerġija.
2. Qabbad il-wajer tat-test iswed mal-jack COM u l-wajer tat-test aħmar mal-jack VΩHz.
3. Dawwar is-swiċċ rotatorju għall-pożizzjoni tas-simbolu tal-Kontinwità.
4. Qabbad il-wajers tat-test madwar iċ-ċirkwit jew il-komponent.
5. If the resistance is less than approximately 60Ω, the buzzer will sound, indicating continuity.

4.10 Transistor hFE Test

1. Connect the multi-function socket to the mA/µA/hFE and COM jacks.
2. Turn the rotary switch to the "hFE" position.
3. Insert the transistor's emitter, base, and collector leads into the corresponding holes on the multi-function socket (NPN or PNP).
4. Read the hFE value (0-1000) on the display.

5. Karatteristiċi

• Display 20000 Counts: Jipprovdi riżoluzzjoni għolja għal kejl preċiż.
• Żamma tad-Data: Agħfas il-buttuna "HOLD" biex tiffriża l-qari attwali fuq id-displej. Agħfas mill-ġdid biex tirrilaxxa.
• Mitfi Awtomatiku: The meter automatically turns off after a period of inactivity to conserve battery life.
• Low Battery Display: An icon on the display indicates when the batteries are low and need replacement.

6. Manutenzjoni

6.1 Tindif

Imsaħ il-każ bl-adamp cloth and mild detergent. Do not use abrasives or solvents. Keep the input terminals free from dirt and moisture.

6.2 Sostituzzjoni tal-batterija

Refer to Section 3.2 for detailed instructions on replacing the LR44 batteries.

6.3 Ħażna

If the meter is not used for an extended period, remove the batteries to prevent leakage and damage. Store the meter in a cool, dry place away from direct sunlight.

7 Issolvi l-problemi

8. Speċifikazzjonijiet

The following table details the technical specifications of the MASTECH MY75 Digital Multimeter.

Figure 8.1: Detailed specifications including range, resolution, and accuracy for various measurement functions of the MY75.

9. Garanzija u Appoġġ

MASTECH products are designed for reliability and performance. For warranty information or technical support, please refer to the contact details provided with your purchase documentation or visit the official MASTECH websit. Żomm l-irċevuta tax-xiri tiegħek bħala prova tax-xiri għal talbiet ta' garanzija.

EU Spare Part Availability Duration: 1 Year.