Mastech MS8251A Digital Multimeter User Manual

1. Sarrera

Eskerrik asko erosketagatik.asing the Mastech MS8251A Digital Multimeter. This device is a portable, professional measuring instrument with a large LCD display, providing clear and easy-to-read results. It is designed for use in laboratories, factories, and homes, offering a wide range of functions including AC/DC voltage, AC/DC current, resistance, capacitance, frequency, duty cycle, temperature, diode, continuity, and non-contact voltage (NCV) detekzioa.

Please read this manual thoroughly before using the meter to ensure safe and proper operation. Keep this manual for future reference.

2. Segurtasun informazioa

OHARRA: To avoid possible electric shock or personal injury, and to avoid possible damage to the meter or to the equipment under test, follow these instructions:

• Ziurtatu beti neurgailua egiten ari den neurketarako funtzio eta tarte egokian dagoela.
• Ez aplikatu bolumen baloratua baino gehiagotage, neurgailuan markatuta dagoen moduan, terminalen artean edo edozein terminal eta lur-lurraren artean.
• Kontuz boltag30V AC RMS, 42V peak edo 60V DC-tik gorakoak. Bolumen hauektagshock arriskua dakar.
• Before making current measurements, ensure the meter's fuses are intact and the test leads are connected to the correct input jacks.
• Deskonektatu zirkuituaren potentzia eta deskargatu bolumen handiko guztiaktage kondentsadoreak erresistentzia, jarraitutasuna, diodoak edo kapazitatea probatu aurretik.
• Do not use the meter if it is damaged or if the case (or part of the case) is removed. Inspect the meter before use.
• Ez erabili neurgailua gas, lurrun edo hauts lehergarrien inguruan.
• Neurgailua zaintzeko orduan, erabili zehaztutako ordezko piezak soilik.
• Always use approved test leads.
• Ez erabili neurgailua bateriaren estalkia behar bezala itxita ez badago.
• Kendu proba-kableak neurgailutik bateriaren estalkia ireki aurretik.

3. Ezaugarri nagusiak

• Pantaila: 6600 zenbaki
• Auto Ranging and Manual Ranging capabilities
• Automatic Power Off function to conserve battery life
• Neurketa erlatiboa modua
• Kontaktu gabeko boltage (NCV) Detector for safety
• Diodo Ireki Bolumenatage: 3.2V
• Continuity Buzzer for quick circuit checks
• MAX/MIN value recording
• Data Hold function to freeze readings
• Low Battery Display indicator
• Display Backlight for visibility in low-light conditions

3.1 Irudia: Gainetikview of Mastech MS8251A features, main applications, and included contents. This image illustrates the versatility of the multimeter across domestic, industrial, and electronics applications, highlighting its core functionalities and what comes in the box.

4. Produktuaren osagaiak eta gehiagoview

The Mastech MS8251A Digital Multimeter is designed for ease of use and durability. Familiarize yourself with its main parts:

• LCD pantaila: Neurketa-irakurketak, unitateak eta funtzio-adierazleak erakusten ditu.
• Funtzio-botoiak: REL△, RANGE, MAX/MIN, HOLD, FUNC, NCV, Backlight.
• Etengailu birakaria: Selects the desired measurement function (e.g., V~, V—, Ω, A~, A—, Temp, Diode, Continuity, Hz%).
• Sarrerako Jackak:
• COM: Neurketa guztietarako terminal komuna.
• VΩHz%Temp→←: Bolumenerako sarreratage, resistance, frequency, duty cycle, temperature, diode, and continuity measurements.
• mAμA: Milirako sarreraampere eta mikroampegungo neurketak.
• 10A: 10erako sarrera Ampere current measurements (fused).

4.1. irudia: Aurrealdea view of the Mastech MS8251A Digital Multimeter, showing the LCD display, function buttons, rotary switch, and input jacks. This image provides a clear visual reference for identifying the various parts of the device.

5. Konfigurazioa

5.1. Bateriaren instalazioa

The Mastech MS8251A requires 2 LR44 batteries (included). To install or replace batteries:

1. Ziurtatu neurgailua itzalita dagoela eta deskonektatu proba-kable guztiak sarrera-terminaletatik.
2. Bilatu bateriaren konpartimentua neurgailuaren atzealdean.
3. Erabili bihurkin bat bateriaren estalkiko torlojua(k) askatzeko.
4. Kendu bateriaren estalkia.
5. Insert the 2 LR44 batteries, observing the correct polarity (+ and -).
6. Jarri berriro bateriaren estalkia eta estutu torlojua(k).

5.2. Proba-kableak konektatzea

Always connect the common (black) test lead to the COM jack. Connect the red test lead to the appropriate input jack based on the measurement you intend to make:

• Voltage, Resistance, Capacitance, Frequency, Duty Cycle, Temperature, Diode, and Continuity measurements, connect the red lead to the VΩHz%Temp→← jack.
• Milirakoampere (mA) or microampere (μA) current measurements, connect the red lead to the mAμA jack.
• 10erako Ampere (10A) current measurements, connect the red lead to the 10A jack.

6. Funtzionamendu-argibideak

Before any measurement, ensure the test leads are correctly connected and the rotary switch is set to the desired function.

6.1. Funtzionamendu Orokorra

• Piztu/Itzali: Turn the rotary switch from OFF to any function to power on. Turn to OFF to power off.
• Itzali automatikoa: The meter will automatically power off after approximately 15 minutes of inactivity to save battery. Press any button or turn the rotary switch to wake it up.
• Atzeko argia: Press the ★ button to turn the display backlight on or off.
• Datuak gordetzea: Sakatu HOLD botoia pantailan uneko irakurketa izozteko. Sakatu berriro askatzeko.
• MAX / MIN: Press the MAX/MIN button to enter MAX/MIN recording mode. The meter will display the maximum or minimum reading detected. Press again to cycle between MAX, MIN, and current reading. Hold to exit.
• GAMA: In auto-ranging mode, press RANGE to switch to manual ranging. Press repeatedly to cycle through available ranges. Hold to return to auto-ranging.
• REL△ (Relative Measurement): Press REL△ to store the current reading as a reference value. Subsequent readings will be displayed as the difference from this reference. Press again to exit.
• FUNTZIOA: In multi-function positions (e.g., Diode/Continuity/Temp), press FUNC to cycle through the available sub-functions.

6.2. Neurketa-funtzio espezifikoak

Below are common measurement procedures. Always refer to the specifications for ranges and accuracy.

6.2.1. DC Voltage Measurement (V—)

1. Set the rotary switch to the V— position.
2. Connect the black test lead to the COM jack and the red test lead to the VΩHz%Temp→← jack.
3. Connect the test leads across the component or circuit to be measured in parallel.
4. Irakurri liburukiatagPantailako balioa.

6.2.2. AC Voltage Neurketa (V~)

1. Set the rotary switch to the V~ position.
2. Connect the black test lead to the COM jack and the red test lead to the VΩHz%Temp→← jack.
3. Connect the test leads across the component or circuit to be measured in parallel.
4. Irakurri liburukiatagPantailako balioa.

6.2.3. Resistance Measurement (Ω)

1. Set the rotary switch to the Ω position.
2. Connect the black test lead to the COM jack and the red test lead to the VΩHz%Temp→← jack.
3. Ziurtatu zirkuitua deskonektatuta dagoela erresistentzia neurtu aurretik.
4. Connect the test leads across the resistor or component.
5. Irakurri erresistentziaren balioa pantailan.

6.2.4. Continuity Test (→←)

1. Set the rotary switch to the →← position. Press FUNC if necessary to select continuity.
2. Connect the black test lead to the COM jack and the red test lead to the VΩHz%Temp→← jack.
3. Ziurtatu zirkuitua desenergizatuta dagoela.
4. Connect the test leads across the circuit or component. If resistance is less than approximately 50Ω, the buzzer will sound, indicating continuity.

6.2.5. Diode Test (→←)

1. Set the rotary switch to the →← position. Press FUNC if necessary to select diode test.
2. Connect the black test lead to the COM jack and the red test lead to the VΩHz%Temp→← jack.
3. Ziurtatu zirkuitua desenergizatuta dagoela.
4. Konektatu proba-kable gorria diodoaren anodora eta proba-kable beltza diodoaren katodora. Pantailak aurreranzko bolumena erakutsiko du.tage drop. Reverse the leads; the display should show OL (Open Loop) for a good diode.

6.2.6. Harremanik gabeko Voltage (NCV) Detekzioa

1. Ezarri biraketa-etengailua NCV posizioan.
2. Move the top end of the meter close to the AC voltage source (e.g., a live wire).
3. The meter will beep and the NCV indicator light will flash if AC voltage is detected. The frequency of beeps and flashes increases with stronger signals.

For other functions like Current (AC/DC), Capacitance, Frequency, Duty Cycle, and Temperature, follow similar steps, ensuring the rotary switch is set to the correct function and test leads are connected to the appropriate input jacks.

7. Mantentzea

7.1. Garbiketa

Garbitu kasua iragarkiarekinamp cloth and mild detergent. Do not use abrasives or solvents. Keep the terminals free from dirt or dust, which can affect readings.

7.2. Bateria ordezkatzea

Bateria baxuaren adierazlea pantailan agertzen denean, ordezkatu bateriak berehala irakurketa zehatzak bermatzeko. Ikusi 5.1 atala bateria instalatzeko argibideak lortzeko.

7.3. Fusiblearen ordezkapena

If the meter fails to measure current, the fuse may be blown. To replace the fuse:

1. Ziurtatu neurgailua itzalita dagoela eta deskonektatu proba-kable guztiak.
2. Ireki bateriaren konpartimentua 5.1 atalean azaltzen den bezala.
3. Locate the fuse(s). The MS8251A typically uses a 10A fuse for the 10A input and a 600mA fuse for the mA/μA input.
4. Carefully remove the old fuse and replace it with a new fuse of the same type and rating.
5. Jarri berriro bateriaren estalkia eta estutu torlojua(k).

Oharra: Always use fuses with the specified voltage and current ratings for safety and proper operation.

8. Arazoak

9. Zehaztapenak

9.1. Zehaztapen orokorrak

• Produktuaren neurriak: 7.87 x 5.91 x 9.84 hazbete (200 x 150 x 250 mm)
• Elementuaren pisua: 2.2 libera (1 kilogramo)
• Kolorea: Urdina
• Energia iturria: Battery Powered (2 LR44 batteries, included)
• Fabrikatzailea: MASTECH
• Modelo zenbakia: YQ-MS8251A
• Segurtasunaren balorazioa: CAT III 600V, CAT II 1000V

9.2. Zehaztapen elektrikoak

Figure 9.1: Detailed electrical specifications for the Mastech MS8251A, including ranges, resolutions, and accuracy for various measurement functions such as DC Voltage, AC Voltage, korronte zuzena, korronte alternoa, erresistentzia, kapazitantzia, maiztasuna eta betebehar-zikloa.

Figure 9.2: Comparison table highlighting features and specifications across various Mastech digital multimeters, including the MS8251A, providing context on its capabilities relative to other models.

10. Bermea

The Mastech MS8251A Digital Multimeter comes with a 1 urteko berme mugatua from the date of purchase. This warranty covers defects in materials and workmanship under normal use. It does not cover damage caused by misuse, accident, unauthorized repair, neglect, or modification. Please retain your purchase receipt as proof of purchase for warranty claims.

11. Laguntza

For technical support, troubleshooting assistance, or warranty inquiries, please contact Mastech customer service. You can find more information and contact details on the official Mastech webgunearen bidez edo produktua erosi duzun dendariaren bidez.

Bisitatu Mastech Store on Amazon produktuari buruzko informazio gehigarria eta laguntza-baliabideak lortzeko.