Homely M890G Digital Multimeter User Manual

1. Pengenalan

Thank you for choosing the Homely M890G Digital Multimeter. This device is a portable, battery-powered digital multimeter designed for measuring AC/DC voltage, AC/DC current, resistance, capacitance, frequency, temperature, diode, and transistor hFE. It features a clear digital display, data hold function, and auto power-off for convenience and efficiency. Please read this manual thoroughly before use to ensure safe and proper operation.

2. Maklumat Keselamatan

AMARAN: Untuk mengelakkan kejutan elektrik atau kecederaan diri, dan untuk mengelakkan kerosakan pada meter atau peralatan yang sedang diuji, patuhi peraturan keselamatan berikut:

• Sentiasa pastikan meter berada dalam fungsi dan julat yang betul sebelum membuat pengukuran.
• Jangan gunakan lebih daripada vol yang dinilaitage, seperti yang ditandakan pada meter, antara terminal atau antara mana-mana terminal dan tanah bumi.
• Gunakan sangat berhati-hati apabila bekerja dengan voltagadalah melebihi 60V DC atau 30V AC RMS. Jiltagia menimbulkan bahaya kejutan.
• Putuskan sambungan wayar ujian daripada litar sebelum menukar fungsi atau julat.
• Jangan gunakan meter jika ia kelihatan rosak atau jika penebat pada wayar ujian terjejas.
• Remove the test leads from the meter before opening the battery cover or fuse cover.
• Gantikan bateri sebaik sahaja penunjuk bateri lemah muncul untuk memastikan bacaan yang tepat.
• Jangan kendalikan meter dalam persekitaran gas meletup, wap atau habuk.

3. Kandungan Pakej

Verify that all items listed below are present and undamaged:

• Homely M890G Digital Multimeter
• Petunjuk Ujian (satu merah, satu hitam)
• K-Type Thermocouple Temperature Probe
• Manual Pengguna

Figure 3.1: Contents of the Homely M890G Digital Multimeter package, including the multimeter, red and black test leads, a K-type thermocouple, and the instruction manual.

4. Produk Lebihview

The Homely M890G Digital Multimeter features a robust design with a clear LCD display and a rotary switch for function selection.

4.1 Susun Atur Panel Hadapan

Rajah 4.1: Bahagian hadapan terperinci view of the M890G multimeter, highlighting the LCD display, function rotary switch, and input terminals. The display shows '00.0' and test leads are connected.

• Paparan LCD: Menunjukkan bacaan ukuran, unit dan penunjuk fungsi.
• Suis Putar: Used to select the desired measurement function (e.g., V~, V=, A~, A=, Ω, °C, Hz, F, Diode, hFE).
• Butang Fungsi: (e.g., HOLD, RANGE, REL, Hz/DUTY, SELECT) for additional features.
• Bicu Input:
  • COM: Common terminal for the black test lead.
  • VΩHz: Input untuk voltage, resistance, frequency, capacitance, diode, and continuity measurements (red test lead).
  • mA: Input untuk miliampere current measurements (red test lead).
  • 20A MAX: Input for high current measurements up to 20A (red test lead).

4.2 Rear Features

Rajah 4.2: Views of the M890G multimeter from the side and rear, illustrating the integrated kickstand for hands-free operation and the battery compartment cover.

• Kickstand: Allows the meter to stand upright for easier viewing.
• Petak Bateri: Located on the rear, secured by screws, for battery replacement.

5. Persediaan

5.1 Pemasangan Bateri

The M890G multimeter requires a 9V battery (not always included). To install or replace the battery:

1. Pastikan multimeter dimatikan dan petunjuk ujian diputuskan.
2. Cari penutup petak bateri di belakang meter.
3. Tanggalkan skru penahan dan tanggalkan penutup dengan berhati-hati.
4. Connect a new 9V battery to the battery clip, observing correct polarity.
5. Letakkan bateri ke dalam petak dan gantikan penutup, selamatkannya dengan skru.

5.2 Menghubungkan Petunjuk Ujian

Sentiasa sambungkan petunjuk ujian hitam ke COM jack. Connect the red test lead to the appropriate input jack based on the measurement type:

• Untuk Voltage, Resistance, Capacitance, Frequency, Diode, and Continuity measurements, connect the red lead to the VΩHz jek.
• For current measurements up to 500mA, connect the red lead to the mA jek.
• For current measurements up to 20A, connect the red lead to the 20A MAX jek.

6. Arahan Operasi

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

6.1 Hidupkan/Mati Kuasa

Turn the rotary switch from the OFF position to any desired function to power on the meter. To power off, turn the rotary switch back to the OFF position. The meter features an auto power-off function to conserve battery life after a period of inactivity.

6.2 Mengukur DC Voltage (V=)

1. Sambungkan plumbum ujian hitam ke COM dan ujian merah membawa kepada VΩHz.
2. Tetapkan suis putar kepada Vol DC yang dikehendakitage (V=) range. If the voltage is unknown, start with the highest range and decrease as needed.
3. Sambungkan wayar ujian secara selari dengan litar atau komponen yang diuji.
4. Baca voltagnilai e pada paparan LCD.

6.3 Mengukur Vol ACtage (V~)

1. Sambungkan plumbum ujian hitam ke COM dan ujian merah membawa kepada VΩHz.
2. Tetapkan suis putar kepada Vol AC yang dikehendakitage (V~) range.
3. Connect the test leads in parallel to the AC source or component.
4. Baca voltagnilai e pada paparan LCD.

6.4 Mengukur Rintangan (Ω)

1. Pastikan litar dinyahtenagakan sebelum mengukur rintangan.
2. Sambungkan plumbum ujian hitam ke COM dan ujian merah membawa kepada VΩHz.
3. Tetapkan suis putar kepada julat Rintangan (Ω) yang dikehendaki.
4. Connect the test leads across the component whose resistance is to be measured.
5. Baca nilai rintangan pada paparan LCD.

6.5 Measuring DC Current (A=)

AWAS: Jangan sekali-kali menyambungkan meter secara selari dengan voltantage sumber semasa mengukur arus. Ini boleh meniup fius atau merosakkan meter.

1. Nyahtenagakan litar.
2. Sambungkan plumbum ujian hitam ke COM. Connect the red test lead to mA for currents up to 500mA, or to 20A MAX for currents up to 20A.
3. Set the rotary switch to the appropriate DC Current (A=) range.
4. Open the circuit where the current is to be measured and connect the meter in series with the load.
5. Re-energize the circuit and read the current value on the LCD display.

6.6 Mengukur Suhu (°C)

1. Connect the K-type thermocouple to the appropriate input jacks (usually VΩHz dan COM, observing polarity if indicated).
2. Set the rotary switch to the Temperature (°C) function.
3. Letakkan hujung termogandingan pada atau berhampiran objek yang suhunya hendak diukur.
4. Baca nilai suhu pada paparan LCD.

6.7 Fungsi Lain

• Ujian Kesinambungan: Set the rotary switch to the continuity symbol. A built-in buzzer will sound if the resistance is below a certain threshold.
• Ujian Diod: Set the rotary switch to the diode symbol. Connect the red lead to the anode and black lead to the cathode of the diode. The forward voltage drop akan dipaparkan.
• Transistor hFE Test: Insert the transistor into the hFE socket on the meter, ensuring correct Emitter, Base, Collector (EBC) orientation for NPN or PNP types. Set the rotary switch to hFE.
• Kapasitansi (F): Set the rotary switch to the capacitance range. Connect the leads across the capacitor (ensure it is discharged first).
• Kekerapan (Hz): Set the rotary switch to the frequency range. Connect the leads to the signal source.

7. Penyelenggaraan

7.1 Pembersihan

Lap meter dengan iklanamp kain dan detergen lembut. Jangan gunakan bahan kasar atau pelarut. Pastikan terminal input bebas daripada kotoran dan kelembapan.

7.2 Penggantian Bateri

When the low battery indicator appears on the display, replace the 9V battery as described in Section 5.1. Failure to do so may result in inaccurate readings.

7.3 Penggantian Fius

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

1. Ensure the meter is off and all test leads are disconnected.
2. Open the battery compartment cover (and potentially an additional fuse cover, depending on the model).
3. Carefully remove the old fuse and replace it with a new one of the identical type and rating.
4. Securely close all covers.

8. Penyelesaian masalah

9. Spesifikasi

10. Waranti dan Sokongan

For warranty information or technical support regarding your Homely M890G Digital Multimeter, please refer to the documentation provided at the time of purchase or contact your retailer. Keep your purchase receipt as proof of purchase.