Manual d'usuari del multímetre digital de la sèrie Mastech MS8301

1. Introducció

This manual provides detailed instructions for the safe and effective operation of the Mastech MS8301 series digital multimeters (MS8301A, MS8301B, MS8301D). These devices are designed for measuring AC/DC voltage, AC/DC current, resistance, diode, and continuity. Specific models offer additional features such as temperature measurement, non-contact voltage (NCV) detection, and auto-ranging. Please read this manual thoroughly before use and keep it for future reference.

2. Informació de seguretat

Always observe the following safety precautions to prevent electric shock or personal injury, and to avoid damage to the meter or the equipment under test.

• No apliqueu més del volum nominaltage, tal com està marcat al comptador, entre els terminals o entre qualsevol terminal i terra.
• Tingueu molta precaució quan treballeu amb voltagper sobre de 30 V CA RMS, 42 V pic o 60 V CC. Aquests voltagsuposen un risc de xoc.
• Before making current measurements, ensure the meter's fuses are intact and the test leads are connected to the correct input jacks.
• Desconnecteu sempre els cables de prova del circuit abans de canviar les funcions o els rangs.
• No utilitzeu el mesurador si sembla danyat o si la carcassa està oberta.
• Assegureu-vos que la tapa de la bateria estigui ben tancada abans de fer-la funcionar.
• Adhere to the specified measurement category (CAT rating) for the meter.

3. Producte acabatview

The Mastech MS8301 series multimeters are compact and robust, featuring a clear digital display and a rotary switch for function selection.

Figure 3.1: Mastech MS8301A Digital Multimeter

Figure 3.2: Mastech MS8301B Digital Multimeter

Figure 3.3: Mastech MS8301D Digital Multimeter

3.1. Components clau

• Pantalla digital: Shows measurement readings.
• Interruptor rotatiu: Selects the desired measurement function (e.g., V~, V-, A~, A-, Ω, Diode, Continuity, Temp, NCV).
• Botons de funció: (Vary by model) Include FUNC (Function), HOLD (Data Hold), MAX/MIN, NCV (Non-Contact Voltagi).
• Preses d'entrada:
• COM: Common terminal for the black test lead.
• VΩHz%: Entrada per al voltage, resistance, frequency, and duty cycle measurements (red test lead).
• mAµA: Input for small current measurements (red test lead).
• 10A: Input for large current measurements (red test lead).

4. Especificacions

Detailed specifications for each model are provided below. Please refer to the specific model you own.

4.1. MS8301A Specifications

Figure 4.1: MS8301A Features and Specifications Overview

Figure 4.2: MS8301A Detailed Specifications Table

4.2. MS8301B Specifications

Figure 4.3: MS8301B Features and Specifications Overview

Figure 4.4: MS8301B Detailed Specifications Table

4.3. MS8301D Specifications

Figure 4.5: MS8301D Features and Specifications Overview

Figure 4.6: MS8301D Detailed Specifications Table

5. Configuració

5.1. Instal·lació de la bateria

The MS8301A and MS8301D models require 2x1.5V AAA batteries. The MS8301B model requires 3x1.5V AAA batteries. To install or replace batteries:

1. Apagueu el multímetre i desconnecteu tots els cables de prova.
2. Localitzeu el compartiment de la bateria a la part posterior del mesurador.
3. Unscrew the retaining screw(s) and remove the battery cover.
4. Insert the new batteries, observing the correct polarity (+ and -).
5. Torneu a col·locar la tapa de la bateria i fixeu-la amb el(s) cargol(s).

5.2. Connexió dels cables de prova

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 you intend to make:

• Per al voltage, Resistance, Frequency, and Duty Cycle: Connect the red lead to the 'VΩHz%' jack.
• For Current (small): Connect the red lead to the 'mAµA' jack.
• For Current (large, up to 10A): Connect the red lead to the '10A' jack.

6. Instruccions de funcionament

The MS8301D model features a 'Smart Function' for automatic detection of measurement type. For other models, manually select the function using the rotary switch.

6.1. Automatic Detection (MS8301D)

For the MS8301D, turn the rotary switch to the 'SMART' position. The meter will automatically detect and measure AC/DC voltage, resistance, or continuity when the test leads are applied to the circuit.

Figure 6.1: Automatic detection of various electrical parameters by the multimeter.

6.2. VoltagMesura (CA/CC)

1. Connect the black test lead to the 'COM' jack and the red test lead to the 'VΩHz%' jack.
2. Seleccioneu l'AC Voltage (V~) o Volum de corrent continutage (V-) range using the rotary switch. For MS8301D, select 'SMART' or 'V'.
3. Connecteu les sondes de prova al component o circuit que s'ha de mesurar.
4. Llegeix el voltage valor a la pantalla.

6.3. Mesura de corrent (CA/CC)

1. Connect the black test lead to the 'COM' jack.
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. Select the appropriate AC Current (A~) or DC Current (A-) range using the rotary switch.
4. Open the circuit where current is to be measured and connect the meter in series with the load.
5. Llegiu el valor actual a la pantalla.

6.4. Mesura de Resistències

1. Connect the black test lead to the 'COM' jack and the red test lead to the 'VΩHz%' jack.
2. Select the 'Ω' (Resistance) function using the rotary switch. For MS8301D, select 'SMART' or 'Ω'.
3. Assegureu-vos que el circuit estigui desenergitzat abans de mesurar la resistència.
4. Connecteu les sondes de prova al component que s'ha de mesurar.
5. Llegiu el valor de resistència a la pantalla.

6.5. Prova de continuïtat

1. Connect the black test lead to the 'COM' jack and the red test lead to the 'VΩHz%' jack.
2. Select the continuity function (often indicated by a speaker icon or combined with diode test) using the rotary switch. For MS8301D, select 'SMART' or the continuity symbol.
3. Connecteu les sondes de prova a través del circuit o component.
4. If the resistance is below a certain threshold (e.g., <30Ω for MS8301A, <50Ω for MS8301B, <40Ω for MS8301D), the buzzer will sound, indicating continuity.

6.6. Prova de díodes

1. Connect the black test lead to the 'COM' jack and the red test lead to the 'VΩHz%' jack.
2. Select the diode test function (often indicated by a diode symbol) using the rotary switch.
3. Connecteu la sonda de prova vermella a l'ànode i la sonda de prova negra al càtode del díode.
4. La pantalla mostrarà el volum d'avançtagcaiguda de e. Invertiu les sondes; la pantalla hauria de mostrar 'OL' (bucle obert) per a un bon díode.

6.7. Temperature Measurement (MS8301B)

1. Connect the K-type thermocouple to the appropriate input jacks (usually VΩHz% and COM, or dedicated temperature jacks if available).
2. Select the temperature function (often indicated by °C/°F) using the rotary switch.
3. Col·loqueu la sonda del termopar sobre o a prop de l'objecte la temperatura del qual es vol mesurar.
4. Llegiu el valor de la temperatura a la pantalla.

6.8. Vol sense contactetage (NCV) Measurement (MS8301B, MS8301D)

1. Select the 'NCV' function using the rotary switch or dedicated button.
2. Hold the top part of the meter near the live conductor.
3. El mesurador indicarà la presència de voltatge de CAtage through an audible beep and/or visual indicator (e.g., LED).

Figure 6.2: Performing Non-Contact Voltage (NCV) measurement.

6.9. Funció de retenció de dades

Premeu el botó «HOLD» per congelar la lectura actual a la pantalla. Torneu-lo a prémer per alliberar la retenció i reprendre les mesures en directe.

6.10. MAX/MIN Function (MS8301D)

Press the 'MAX/MIN' button to record the maximum and minimum values during a measurement session. Press again to cycle through MAX, MIN, and current readings.

6.11. Duty Cycle Measurement (MS8301D)

Select the 'Hz%' function. The meter can measure the duty cycle of a signal, which is the ratio of the pulse width to the period of a square wave or pulse train.

7. Manteniment

7.1. Neteja

Netegeu el comptador amb anuncisamp cloth and a mild detergent. Do not use abrasives or solvents. Keep the display clean and dry.

7.2. Substitució de la bateria

When the battery indicator appears on the display, replace the batteries as described in Section 5.1. Prompt battery replacement ensures accurate readings.

7.3. Substitució de fusibles

If the meter fails to measure current, the fuse may be blown. Refer to the specifications for the correct fuse type and rating for your model. To replace a fuse:

1. Turn off the meter and disconnect all test leads.
2. Open the battery compartment/rear case (may require additional screws beyond battery cover).
3. Carefully remove the old fuse and replace it with a new one of the identical type and rating.
4. Reassemble the meter, ensuring all screws are tightened.

8. Solució De Problemes

9. Consells d'usuari

• Comença sempre amb el rang més alt: Quan es mesura un vol desconeguttage or current, always start with the highest range setting and work your way down to avoid overloading the meter.
• Comproveu els cables de prova: Before any critical measurement, perform a quick continuity test on your test leads to ensure they are not broken or faulty.
• Power off circuits: For resistance and continuity measurements, always ensure the circuit under test is de-energized to prevent damage to the meter and ensure accurate readings.
• Use Data Hold: For measurements in hard-to-reach or poorly lit areas, use the 'HOLD' function to capture the reading for later review.
• Understand CAT ratings: Be aware of the CAT rating of your multimeter and the circuit you are testing. CAT III 600V indicates suitability for distribution level circuits.

10. Certificacions

The Mastech MS8301 series multimeters are certified to meet various international standards, ensuring quality and safety:

• CE (Conformitat Europea)
• FCC (Comissió Federal de Comunicacions)
• RoHS (Restricció de substàncies perilloses)
• UL (Underwriters Laboratories)
• RAEE (Residus d'equips elèctrics i electrònics)

11. Contingut de l'embalatge

Upon opening the product package, please verify that all items are present and in good condition:

• Digital Multimeter (MS8301A/B/D, depending on model purchased)
• Fils de prova
• Battery (2x1.5V AAA for MS8301A/D, 3x1.5V AAA for MS8301B)
• K-type Thermocouple (for MS8301B only)
• Certificat de calibratge
• Guia d'inici ràpid
• Color Box (L145xW60xH188mm)
• Carton Box (40x32x31.5cm, containing 20 PCS)