Irfora T58A Digital Multimeter User Manual

1. Pengenalan

This manual provides detailed instructions for the safe and effective operation of the Irfora T58A Digital Multimeter. The T58A is a handheld, true RMS digital multimeter designed for accurate measurement of AC/DC voltage, AC/DC current, frequency, resistance, capacitance, and diodes. It is suitable for various electrical tasks in industrial and household settings.

Please read this manual thoroughly before using the device to ensure proper usage and to prevent potential hazards.

2. Maklumat Keselamatan

Sentiasa patuhi langkah berjaga-jaga keselamatan asas apabila menggunakan peralatan ujian elektrik untuk mengurangkan risiko kebakaran, renjatan elektrik atau kecederaan diri.

• Jangan melebihi vol maksimumtage ratings specified for the multimeter.
• Ensure the test leads are in good condition and properly connected before each use.
• Do not use the multimeter if it appears damaged or if the casing is open.
• Berhati-hati apabila bekerja dengan voltagadalah melebihi 30V AC RMS, puncak 42V atau 60V DC. Ini voltagia menimbulkan bahaya kejutan.
• Gantikan bateri dengan segera apabila penunjuk bateri lemah muncul untuk memastikan bacaan yang tepat.
• Always disconnect power to the circuit under test and discharge all high-voltage kapasitor sebelum mengukur rintangan, kesinambungan, diod atau kemuatan.

3. Produk Lebihview

The Irfora T58A Digital Multimeter features a large LCD display, a rotary switch for function selection, and various input jacks.

Figure 3.1: Front Panel Components. This image displays the front panel of the Irfora T58A Digital Multimeter with key components labeled, including the LED Display, NCV Sensing Area, Illumination, NCV and Buzzer Indicator Light, Infrared Remote Control Detection, Maximum and Minimum Switching, Data Hold/Relative Value Measurement, Transistor Jack, Functions Switch Button, Lighting/Backlight, Gear Rotary Switch, mA Input Socket, 10A Input Socket, VΩHz℃ Input Socket, and COM Input Socket.

Rajah 3.2: Belakang View with Support Stand. This image shows the back of the Irfora T58A Digital Multimeter, highlighting the integrated support stand and storage slots for test leads. The stand allows for hands-free operation.

4. Persediaan

4.1 Pemasangan Bateri

The Irfora T58A Digital Multimeter requires 3 x 1.5V AAA batteries (not included).

1. Pastikan multimeter dimatikan.
2. Cari penutup petak bateri di bahagian belakang peranti.
3. Tanggalkan skru penahan dan tanggalkan penutup.
4. Insert three AAA batteries, observing the correct polarity (+ and -).
5. Gantikan penutup petak bateri dan kencangkannya dengan skru.

4.2 Menghubungkan Petunjuk Ujian

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

• Untuk voltage, resistance, capacitance, frequency, diode, and temperature measurements, connect the red lead to the VΩHz℃ bicu input.
• For current measurements up to 600mA, connect the red lead to the mA bicu input.
• For current measurements up to 10A, connect the red lead to the 10A bicu input.

Awas: Incorrect connection of test leads can damage the multimeter or the circuit under test.

5. Arahan Operasi

The T58A multimeter features a rotary switch to select measurement functions and buttons for additional features.

5.1 Power On/Off and Automatic Shutdown

• To power on, rotate the gear rotary switch from the "OFF" position to any desired measurement function.
• The multimeter will automatically shut down after approximately 15 minutes of inactivity to conserve battery life. An audible prompt will sound before shutdown. Press any button or rotate the switch to restart.
• To manually power off, rotate the gear rotary switch to the "OFF" position.

Figure 5.1: Automatic Shutdown. This image illustrates the automatic shutdown feature of the multimeter, which activates after 15 minutes of no operation to save power.

5.2 Lampu latar dan Lampu Suluh

The multimeter is equipped with a backlight for the LCD display and a flashlight for illuminating the work area.

• Tekan ke Lighting/Backlight button (often marked with a light bulb icon) to toggle the backlight on/off.
• Tekan dan tahan butang Lighting/Backlight button to activate the flashlight. Release to turn off.

Figure 5.2: Backlit Screen and Flashlight. This image demonstrates the multimeter's backlit screen for clear visibility in low-light conditions and the integrated flashlight for illuminating the measurement area.

5.3 NCV (Not-Contact Voltage) Ujian

Fungsi NCV membolehkan pengesanan volum AC tanpa sentuhantage, useful for identifying live wires without direct contact.

1. Rotate the gear rotary switch to the NCV kedudukan.
2. Place the top of the multimeter (NCV sensing area) close to the conductor you wish to test.
3. Sekiranya AC voltage is detected, the corresponding signal strength indicator will light up (low-yellow, high-red), and the buzzer will emit an alarm with varying frequency.

Rajah 5.3: NCV Voltage Pengukuran. This image shows the multimeter in NCV mode, detecting AC voltage near an electrical outlet, indicated by the illuminated signal strength indicator and audible alarm.

5.4 Mengukur Voltage (AC/DC)

1. Sambungkan plumbum ujian hitam ke COM bicu dan ujian merah membawa kepada VΩHz℃ jek.
2. Rotate the gear rotary switch to the desired AC Voltage (V~) atau Voltan DCtage (V=) range. The T58A often features an "AUTO" range for voltage.
3. Connect the test probes in parallel to the circuit or component you wish to measure.
4. Baca voltagnilai e pada paparan LCD.

5.5 Measuring Current (AC/DC)

Awas: Always connect the multimeter in series with the circuit when measuring current. Never connect it in parallel to a voltage source, as this can blow the fuse or damage the meter.

1. Putuskan sambungan kuasa ke litar.
2. Sambungkan plumbum ujian hitam ke COM jek.
3. For current up to 600mA, connect the red test lead to the mA jack. For current up to 10A, connect the red test lead to the 10A jek.
4. Rotate the gear rotary switch to the desired AC Current (A~) or DC Current (A=) range.
5. Break the circuit and connect the test probes in series with the load.
6. Guna kuasa pada litar dan baca nilai semasa pada paparan LCD.

5.6 Mengukur Rintangan

1. Disconnect power to the circuit and discharge any capacitors.
2. Sambungkan plumbum ujian hitam ke COM bicu dan ujian merah membawa kepada VΩHz℃ jek.
3. Rotate the gear rotary switch to the Ω (Rintangan) kedudukan.
4. Connect the test probes across the component to measure its resistance.
5. Baca nilai rintangan pada paparan LCD.

5.7 Mengukur Kapasitansi

1. Disconnect power to the circuit and ensure the capacitor is fully discharged before testing.
2. Sambungkan plumbum ujian hitam ke COM bicu dan ujian merah membawa kepada VΩHz℃ jek.
3. Rotate the gear rotary switch to the F (Kapasitansi) kedudukan.
4. Sambungkan kuar ujian merentasi kapasitor.
5. Baca nilai kemuatan pada paparan LCD.

5.8 Ujian Diod

1. Disconnect power to the circuit and remove the diode from the circuit if possible.
2. Sambungkan plumbum ujian hitam ke COM bicu dan ujian merah membawa kepada VΩHz℃ jek.
3. Rotate the gear rotary switch to the Diod simbol.
4. Sambungkan kuar merah ke anod dan kuar hitam ke katod diod. Paparan akan menunjukkan vol ke hadapantage penurunan.
5. Balikkan kuar. Paparan harus menunjukkan "OL" (Gelung Terbuka) untuk diod yang baik.

5.9 Ujian Kesinambungan

1. Putuskan sambungan kuasa ke litar.
2. Sambungkan plumbum ujian hitam ke COM bicu dan ujian merah membawa kepada VΩHz℃ jek.
3. Rotate the gear rotary switch to the Buzzer symbol (often shared with resistance or diode).
4. Sentuh kuar ujian ke dua titik yang anda ingin periksa untuk kesinambungan.
5. If there is continuity (low resistance), the buzzer will sound.

5.10 Transistor hFE Test (T58A only)

The T58A model includes a transistor hFE test function.

1. Rotate the gear rotary switch to the hFE kedudukan.
2. Identify the Emitter (E), Base (B), and Collector (C) leads of the transistor.
3. Insert the transistor leads into the corresponding holes in the Transistor Jack (E, B, C) on the multimeter. Ensure correct NPN or PNP type selection if applicable.
4. Read the hFE value (DC current gain) on the LCD display.

6. Penyelenggaraan

6.1 Pembersihan

Lap kes dengan iklanamp kain dan bahan pencuci ringan. Jangan gunakan pelelas atau pelarut.

6.2 Penggantian Bateri

When the low battery indicator appears on the display, replace the batteries as described in Section 4.1. Remove batteries if the meter is not used for extended periods.

6.3 Penggantian Fius

If the current measurement function fails, the fuse may need replacement.

• Pastikan multimeter dimatikan dan petunjuk ujian diputuskan.
• Open the battery compartment cover. The fuses are typically located near the battery compartment.
• Replace the blown fuse with a fuse of the same type and rating:
  • mA fuse: F 600mA/250V
  • A fuse: F 10A/250V
• Tutup penutup petak bateri dengan selamat.

7. Penyelesaian masalah

• Tiada paparan atau paparan samar:
  • Periksa pemasangan bateri dan polariti.
  • Replace batteries if low battery indicator is present or if display is faint.
• "OL" (Beban Lebihan) dipaparkan:
  • The measured value exceeds the selected range. Select a higher range or ensure the circuit is within the meter's capabilities.
  • For resistance/continuity, ensure the circuit is de-energized.
• Incorrect current measurement:
  • Check if the fuse for the current input is blown (refer to Section 6.3).
  • Ensure test leads are connected to the correct current input jack (mA or 10A).
  • Verify the multimeter is connected in series with the load.
• Bacaan tidak tepat:
  • Ensure test leads are fully inserted and making good contact.
  • Periksa tahap bateri.
  • Sahkan fungsi dan julat yang betul dipilih.

8. Spesifikasi

The following table outlines the key specifications for the Irfora T58A Digital Multimeter.

Rajah 8.1: Dimensi Produk. This image shows the physical dimensions of the Irfora T58A Digital Multimeter: 187mm (7.36in) length, 95mm (3.74in) width, and 55mm (2.16in) thickness.

Nota mengenai Spesifikasi: The provided product description contains multiple sets of specifications. For the T58A model, a combination of the most relevant and detailed specifications has been used, prioritizing information specific to T58A/B/C models where available.

9. Waranti dan Sokongan

For warranty information or technical support, please refer to the contact details provided with your purchase or visit the official Irfora webtapak. Simpan resit pembelian anda sebagai bukti pembelian.