Manual d'usuari del multímetre digital Irfora T58A

1. Introducció

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. Informació de seguretat

Sempre cal seguir les precaucions de seguretat bàsiques quan s'utilitzin equips de prova elèctrica per reduir el risc d'incendi, descàrrega elèctrica o lesions personals.

• No supereu el volum màximtage ratings specified for the multimeter.
• Assegureu-vos que els cables de prova estiguin en bon estat i connectats correctament abans de cada ús.
• Do not use the multimeter if it appears damaged or if the casing està obert.
• Aneu amb extrema precaució quan treballeu amb voltagper sobre de 30 V CA RMS, 42 V pic o 60 V CC. Aquests voltagsuposen un risc de xoc.
• Canvieu les piles immediatament quan aparegui l'indicador de bateria baixa per garantir lectures precises.
• Always disconnect power to the circuit under test and discharge all high-voltagcondensadors abans de mesurar la resistència, la continuïtat, els díodes o la capacitància.

3. Producte acabatview

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.

Figura 3.2: posterior 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. Configuració

4.1 Instal·lació de la bateria

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

1. Assegureu-vos que el multímetre estigui apagat.
2. Localitzeu la tapa del compartiment de la bateria a la part posterior del dispositiu.
3. Descargoleu el(s) cargol(s) de subjecció i traieu la coberta.
4. Insert three AAA batteries, observing the correct polarity (+ and -).
5. Torneu a col·locar la tapa del compartiment de la bateria i fixeu-la amb el(s) cargol(s).

4.2 Connexió dels cables de prova

Connecteu sempre el cable de prova negre al COM (common) input jack. Connect the red test lead to the appropriate input jack based on the measurement function:

• Per al voltage, resistance, capacitance, frequency, diode, and temperature measurements, connect the red lead to the VΩHz℃ presa d'entrada.
• For current measurements up to 600mA, connect the red lead to the mA presa d'entrada.
• For current measurements up to 10A, connect the red lead to the 10A presa d'entrada.

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

5. Instruccions de funcionament

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 Retroiluminació i llanterna

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

• Premeu el botó Lighting/Backlight button (often marked with a light bulb icon) to toggle the backlight on/off.
• Manteniu premut el botó 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 (Volum sense contacte)tage) Prova

La funció NCV permet la detecció sense contacte del volum de CA.tage, useful for identifying live wires without direct contact.

1. Rotate the gear rotary switch to the NCV posició.
2. Place the top of the multimeter (NCV sensing area) close to the conductor you wish to test.
3. Si 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.

Figure 5.3: NCV Voltage Mesura. 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 Volum de mesuratage (AC/DC)

1. Connecteu el cable de prova negre al COM jack i el cable de prova vermell al VΩHz℃ jack.
2. Rotate the gear rotary switch to the desired AC Voltage (V~) o Volum de corrent continutage (V=) range. The T58A often features an "AUTO" range for voltage.
3. Connecteu les sondes de prova en paral·lel al circuit o component que voleu mesurar.
4. Llegeix el voltage valor a la pantalla LCD.

5.5 Mesura del corrent (CA/CC)

Precaució: 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. Desconnecteu l'alimentació del circuit.
2. Connecteu el cable de prova negre al COM jack.
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 jack.
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. Apliqueu alimentació al circuit i llegiu el valor del corrent a la pantalla LCD.

5.6 Mesura de la resistència

1. Disconnect power to the circuit and discharge any capacitors.
2. Connecteu el cable de prova negre al COM jack i el cable de prova vermell al VΩHz℃ jack.
3. Rotate the gear rotary switch to the Ω Posició (de resistència).
4. Connect the test probes across the component to measure its resistance.
5. Llegiu el valor de la resistència a la pantalla LCD.

5.7 Mesura de la capacitat

1. Disconnect power to the circuit and ensure the capacitor is fully discharged before testing.
2. Connecteu el cable de prova negre al COM jack i el cable de prova vermell al VΩHz℃ jack.
3. Rotate the gear rotary switch to the F Posició (capacitància).
4. Connecteu les sondes de prova a través del condensador.
5. Llegiu el valor de la capacitat a la pantalla LCD.

5.8 Prova de díodes

1. Disconnect power to the circuit and remove the diode from the circuit if possible.
2. Connecteu el cable de prova negre al COM jack i el cable de prova vermell al VΩHz℃ jack.
3. Rotate the gear rotary switch to the Díode símbol.
4. Connecteu la sonda vermella a l'ànode i la sonda negra al càtode del díode. La pantalla mostrarà el volum directe.tage gota.
5. Reverse the probes. The display should show "OL" (Open Loop) for a good diode.

5.9 Prova de continuïtat

1. Desconnecteu l'alimentació del circuit.
2. Connecteu el cable de prova negre al COM jack i el cable de prova vermell al VΩHz℃ jack.
3. Rotate the gear rotary switch to the Zumbador symbol (often shared with resistance or diode).
4. Toqueu les sondes de prova als dos punts on voleu comprovar la continuïtat.
5. Si hi ha continuïtat (baixa resistència), sonarà el brunzidor.

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 posició.
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. Manteniment

6.1 Neteja

Netegeu el cas amb l'anunciamp drap i detergent suau. No utilitzeu abrasius ni dissolvents.

6.2 Substitució de la bateria

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 Canvi de fusibles

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

• Assegureu-vos que el multímetre estigui apagat i que els cables de prova estiguin desconnectats.
• 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
• Tanqueu de manera segura la tapa del compartiment de la bateria.

7. Solució De Problemes

• Sense pantalla o pantalla tènue:
  • Comproveu la instal·lació i la polaritat de la bateria.
  • Replace batteries if low battery indicator is present or if display is faint.
• "OL" (Overload) displayed:
  • El valor mesurat supera el rang seleccionat. Seleccioneu un rang superior o assegureu-vos que el circuit estigui dins de les capacitats del mesurador.
  • Per a la resistència/continuïtat, assegureu-vos que el circuit estigui desenergitzat.
• 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.
• Lectures inexactes:
  • Ensure test leads are fully inserted and making good contact.
  • Comproveu el nivell de la bateria.
  • Verifiqueu que s'ha seleccionat la funció i l'interval correctes.

8. Especificacions

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

Figura 8.1: Dimensions del producte. 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.

Note on Specifications: 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. Garantia i Suport

For warranty information or technical support, please refer to the contact details provided with your purchase or visit the official Irfora weblloc web. Conserveu el rebut de compra com a comprovant de compra.