Manual Pengguna Multimeter Digital Mini Mastech M300

1. Pengenalan

The Mastech M300 is a compact, 13-range mini digital multimeter designed for basic electrical measurements. It is capable of measuring AC/DC voltage up to 500 volts, DC current up to 200 mA, resistance, diode continuity, and features a buzzer for continuity checks. Its attached test leads make it highly portable and convenient for various applications.

2. Maklumat Keselamatan

WARNING: To avoid electrical shock, remove input leads before opening the case. To prevent fire, install the fuse with the specified amp/volt ratings.

• Always ensure the multimeter is set to the correct range before making measurements.
• Jangan cuba mengukur voltages atau arus melebihi had maksimum yang ditetapkan.
• Sentiasa berhati-hati apabila bekerja dengan litar hidup.
• Periksa wayar ujian untuk kerosakan sebelum setiap penggunaan. Jangan gunakan jika penebat terjejas.
• Never open the multimeter casing unless absolutely necessary for maintenance (e.g., fuse replacement) and ensure it is disconnected from all power sources.
• This device is rated for CAT III 600V.

Rajah 2.1: Belakang view of the Mastech M300 multimeter, displaying important safety warnings regarding electrical shock and fuse specifications. The battery compartment is also visible.

3. Ciri-ciri Produk

• Mengukur Vol. AC/DCtage sehingga 500V.
• Measures DC Current up to 200mA.
• Measures Resistance (0-2MΩ).
• Diode and Continuity Test with Buzzer.
• Penggunaan kuasa yang rendah untuk hayat bateri yang dilanjutkan.
• Overload indication for safety.
• Integrated test leads for convenience.

Rajah 3.1: Depan view of the Mastech M300 Mini Digital Multimeter, showing the LCD display, rotary switch, function buttons, and integrated red and black test leads.

4. Kandungan Pakej

Setelah membuka bungkusan, sila sahkan bahawa semua barang ada dan tidak rosak:

• Mastech M300 Mini Digital Multimeter (with attached test leads)
• SR44 3V Batteries (x2, pre-installed)
• Manual Pengguna

5. Persediaan

5.1 Pemasangan/Penggantian Bateri

The Mastech M300 uses two SR44 3V batteries, which are typically pre-installed. If replacement is needed:

1. Ensure the multimeter is turned OFF and disconnect all test leads from any circuits.
2. Cari petak bateri di bahagian belakang unit (rujuk Rajah 2.1).
3. Buka penutup petak bateri dengan berhati-hati.
4. Remove the old batteries and insert new SR44 3V batteries, observing the correct polarity (+/-).
5. Tutup penutup petak bateri dengan selamat.

5.2 Menghubungkan Petunjuk Ujian

The Mastech M300 features integrated test leads. Ensure they are securely attached to the meter and free from any damage before use.

6. Arahan Operasi

Before making any measurement, ensure the multimeter is set to the appropriate function and range. The rotary switch is used to select the desired measurement type.

6.1 Mengukur DC Voltage (V–)

1. Tetapkan suis putar kepada Vol DC yang dikehendakitage range (e.g., 500V, 200V, 20V, 2V, 200mV). Start with the highest range if the voltage tidak diketahui.
2. Sambungkan petunjuk ujian merah ke sisi positif (+) litar dan petunjuk ujian hitam ke sisi negatif (-).
3. Baca voltagnilai e pada paparan LCD.

6.2 Mengukur Vol ACtage (V∼)

1. Tetapkan suis putar kepada Vol AC yang dikehendakitage range (e.g., 500V, 200V). Start with the highest range if the voltage tidak diketahui.
2. Sambungkan petunjuk ujian merentasi vol ACtage sumber.
3. Baca voltagnilai e pada paparan LCD.

6.3 Measuring DC Current (A–)

CAUTION: To measure current, the multimeter must be connected in series with the circuit. Never connect the multimeter in parallel across a voltage source when in current mode, as this can damage the meter and the circuit.

1. Set the rotary switch to the desired DC Current range (e.g., 200mA, 20mA, 2mA, 200µA).
2. Break the circuit where you want to measure current.
3. Connect the red test lead to the higher potential side of the break and the black test lead to the lower potential side, completing the circuit through the multimeter.
4. Baca nilai semasa pada paparan LCD.

6.4 Measuring Resistance (Ω)

CAUTION: Ensure the circuit or component is completely de-energized before measuring resistance. Measuring resistance on a live circuit can damage the multimeter.

1. Set the rotary switch to the desired Resistance range (e.g., 2MΩ, 200kΩ, 20kΩ, 2kΩ, 200Ω).
2. Sambungkan wayar ujian merentasi komponen yang rintangannya ingin diukur.
3. Baca nilai rintangan pada paparan LCD.

6.5 Ujian Diod

1. Set the rotary switch to the Diode symbol (→|–).
2. Connect the red test lead to the anode of the diode and the black test lead to the cathode. The display will show the forward voltage penurunan.
3. Songsangkan wayar. Paparan hendaklah menunjukkan 'OL' (Gelung Terbuka) untuk diod yang baik.

6.6 Ujian Kesinambungan

1. Set the rotary switch to the Continuity symbol (♫).
2. Connect the test leads across the component or wire you wish to test.
3. If there is continuity (low resistance), the buzzer will sound, and the display will show a low resistance value. If there is no continuity, the display will show 'OL'.

7. Penyelenggaraan

7.1 Pembersihan

Untuk membersihkan multimeter, lap bekas dengan iklanamp cloth and a mild detergent. Do not use abrasives or solvents. Ensure the unit is completely dry before use.

7.2 Penggantian Fius

If the current measurement function stops working, the fuse may need replacement. Refer to the safety warnings on the back of the unit for fuse specifications (F 250mA/250V).

1. Pastikan multimeter dimatikan dan putuskan sambungan semua petunjuk ujian.
2. Open the multimeter casing (this typically involves removing screws on the back).
3. Locate the fuse and carefully remove it.
4. Replace with a fuse of the exact same type and rating (F 250mA/250V).
5. Securely close the casing.

8. Penyelesaian masalah

• Tiada Paparan / Paparan Samar: Check battery charge. Replace batteries if necessary.
• Bacaan yang salah: Ensure the rotary switch is set to the correct function and range. Verify test lead connections. Ensure the circuit is de-energized for resistance measurements.
• Tiada Pengukuran Arus: Check the fuse. Replace if blown (refer to Section 7.2).
• Paparan 'OL' (Lebihan): The measured value exceeds the selected range. Switch to a higher range or verify the circuit.

9. Spesifikasi

10. Waranti dan Sokongan

This Mastech M300 Mini Digital Multimeter comes with a Waranti 1 tahun dari tarikh pembelian, meliputi kecacatan pembuatan. Sila simpan bukti pembelian anda untuk tuntutan waranti.

For technical support, warranty service, or inquiries, please contact Mastech customer service through their official webtapak atau peruncit tempat produk itu dibeli.