Manual de utilizare multimetru analogic Brother HD-390D

1. Introducere

The Brother HD-390D is a high-precision analog multimeter designed for electricians, hobbyists, and home maintenance tasks. It provides accurate measurements for AC/DC voltage, AC/DC current, resistance, and battery levels. This manual provides essential information for safe and effective operation of your device.

2. Informații de siguranță

WARNING: READ AND UNDERSTAND THIS MANUAL BEFORE USING THE INSTRUMENT. Failure to understand and comply with the WARNING and operating instructions can result in serious or fatal injuries and/or property damage.

• Always ensure the multimeter is set to the correct function and range before connecting to a circuit.
• Nu depășiți valorile maxime de intrare pentru nicio funcție.
• Atenție când lucrați cu circuite sub tensiune. Volum maretages can be dangerous.
• Verificați cablurile de testare pentru a depista eventualele deteriorări înainte de fiecare utilizare. Înlocuiți-le dacă izolația este crăpată sau dacă firele sunt expuse.
• Asigurați-vă că capacul bateriei este închis corect înainte de utilizare.
• For continued protection against fire, replace fuses only with specified types: 0.5A/250V and 10A/250V.

3. Conținutul pachetului

Verificați dacă toate articolele sunt prezente în colet:

• Brother HD-390D Analog Multimeter
• Cabluri de testare (roșu și negru)
• Manual de instrucțiuni pentru operator
• Protective Carrying Case (may be included depending on variant)

Figure 3.1: Multimeter with test leads and optional carrying case.

4. Produs terminatview

The HD-390D features a clear analog display, a central rotary switch for function and range selection, and input jacks for test leads. An Ohm adjustment knob is provided for resistance measurements.

Figure 4.1: Front panel of the HD-390D Multimeter.

Componente cheie:

• Afișaj analogic: Large, easy-to-read scale for measurement readings.
• Comutator rotativ: Selects measurement function (Voltage, Current, Resistance, Battery) and range.
• Mufe de intrare: Connect test leads. 'COM' for common (black lead), 'VΩmA+' for positive (red lead) for most measurements, '+10A' for high current measurements.
• Ω ADJ Knob: Folosit pentru a aduce la zero contorul pentru măsurători de rezistență.
• Transistor/Diode Test Sockets: Dedicated sockets for testing transistors (NPN/PNP hFE) and diodes.

5. Configurare

5.1 Instalarea bateriei

The multimeter requires two 1.5V AAA batteries and one 9V battery for operation. These are not included.

1. Localizați capacul bateriei pe spatele multimetrului.
2. Slide the cover down and open as indicated by the 'PULL DOWN' and 'OPEN' markings.
3. Insert the two 1.5V AAA batteries and one 9V battery, observing correct polarity.
4. Închideți bine capacul bateriei.

Figure 5.1: Back panel with battery and fuse access.

5.2 Conectarea cablurilor de testare

Conectați întotdeauna corect sondele de testare pentru măsurători precise și sigure.

• Introduceți sonda neagră de testare în mufa „COM” (Comun).
• Pentru majoritatea măsurătorilor (Voltage, Resistance, low Current), insert the red test lead into the 'VΩmA+' jack.
• For high current measurements (up to 10A), insert the red test lead into the '+10A' jack.

Figure 5.2: Multimeter with test leads connected.

6. Instrucțiuni de utilizare

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

6.1 DC Voltage Measurement (DC V)

1. Connect the red lead to 'VΩmA+' and the black lead to 'COM'.
2. Set the rotary switch to the desired DC V range (e.g., 0.1V, 0.5V, 2.5V, 10V, 50V, 250V, 1000V). Start with the highest range if the voltage necunoscută.
3. Conectați sondele de testare în paralel pe componenta sau circuitul care urmează să fie măsurat.
4. Citiți voltage value from the appropriate DC V scale on the analog display.

6.2 AC Voltage Measurement (AC V)

1. Connect the red lead to 'VΩmA+' and the black lead to 'COM'.
2. Set the rotary switch to the desired AC V range (e.g., 10V, 50V, 250V, 1000V). Start with the highest range if the voltage necunoscută.
3. Conectați sondele de testare în paralel pe componenta sau circuitul care urmează să fie măsurat.
4. Citiți voltage value from the appropriate AC V scale on the analog display.

6.3 DC Current Measurement (DC A)

1. For currents up to 250mA, connect the red lead to 'VΩmA+' and the black lead to 'COM'. For currents up to 10A, connect the red lead to '+10A' and the black lead to 'COM'.
2. Set the rotary switch to the desired DC A range (e.g., 0.05mA, 0.25mA, 2.5mA, 25mA, 250mA, 10A). Start with the highest range if the current is unknown.
3. Important: Connect the multimeter in series with the circuit to be measured. Break the circuit and insert the meter.
4. Read the current value from the appropriate DC A scale.

6.4 AC Current Measurement (AC A)

1. For currents up to 250mA, connect the red lead to 'VΩmA+' and the black lead to 'COM'. For currents up to 10A, connect the red lead to '+10A' and the black lead to 'COM'.
2. Set the rotary switch to the desired AC A range (e.g., 0.05mA, 0.25mA, 2.5mA, 25mA, 250mA, 10A). Start with the highest range if the current is unknown.
3. Important: Connect the multimeter in series with the circuit to be measured. Break the circuit and insert the meter.
4. Read the current value from the appropriate AC A scale.

6.5 Măsurarea rezistenței (Ω)

1. Connect the red lead to 'VΩmA+' and the black lead to 'COM'.
2. Set the rotary switch to the desired Resistance range (e.g., X1, X10, X1K, X10K, X100K).
3. Ajustare la zero: Short the test leads together. While shorted, adjust the 'Ω ADJ' knob until the needle points to '0' on the Ohm scale. This must be done for each resistance range.
4. Connect the test probes across the component to be measured (ensure the component is de-energized).
5. Read the resistance value from the Ohm scale and multiply by the selected range multiplier.

6.6 Battery Test (BATT)

1. Connect the red lead to 'VΩmA+' and the black lead to 'COM'.
2. Set the rotary switch to the 'BATT' function (1.5V or 9V).
3. Connect the test probes to the battery terminals, observing polarity.
4. Citiți volumul baterieitage from the appropriate battery scale.

6.7 Diode and Transistor Check

1. Set the rotary switch to the 'Ω X 10' range for transistor and diode checks.
2. For transistor hFE measurement, insert the transistor leads into the appropriate NPN or PNP sockets.
3. For diode check, use the extra jack as indicated in the specifications.

6.8 Verificare continuitate

1. Set the rotary switch to the 'Continuity Check' position (often indicated by a speaker icon).
2. Conectați sondele de testare la circuit sau la componentă.
3. If the resistance is less than 200 Ohms, the beeper will sound, indicating continuity.

7. Specificații

The following table details the technical specifications of the Brother HD-390D Analog Multimeter:

Figura 7.1: DC Voltage Specificații.

Figura 7.2: AC Voltage, Current, Resistance, and other Specifications.

8. Întreținere

8.1 Curățare

Pentru a curăța multimetrul, ștergeți carcasa cu un detergent de vată.amp o lavetă și un detergent blând. Nu utilizați abrazive sau solvenți. Asigurați-vă că dispozitivul este oprit și deconectat de la orice circuit înainte de curățare.

8.2 Înlocuirea bateriei

When the battery indicator shows low power, replace the batteries promptly to ensure accurate readings. Refer to Section 5.1 for battery installation instructions.

8.3 Înlocuirea siguranței

If the current measurement function stops working, the fuse may be blown. To replace the fuse:

1. Ensure the multimeter is powered off and disconnected from all circuits.
2. Open the battery cover on the back of the unit (refer to Figure 5.1).
3. Carefully remove the old fuse(s).
4. Replace with new fuses of the specified ratings: 0.5A/250V for mA ranges and 10A/250V for the 10A range.
5. Închideți bine capacul bateriei.

9. Depanare

• No reading or unstable reading: Check battery levels and replace if necessary. Ensure test leads are securely connected and not damaged. Verify the rotary switch is set to the correct function and range.
• Incorrect resistance reading: Perform Ohm adjustment (zeroing) as described in Section 6.5. Ensure the component being tested is de-energized.
• Măsurarea curentului nu funcționează: Check the fuse(s) and replace if blown (refer to Section 8.3). Ensure the meter is connected in series with the circuit.
• Needle not moving: Ensure the meter is powered on (if applicable for specific functions) and the test leads are making good contact.

10. Sfaturi pentru utilizatori

• Începeți întotdeauna cu intervalul cel mai mare: La măsurarea unui volum necunoscuttage or current, always start with the highest range setting and then decrease it until you get a suitable reading. This prevents overloading the meter.
• Zero Ohm adjustment: Remember to perform the Ohm adjustment (zeroing) every time you change the resistance range for accurate readings.
• Respectați polaritatea: For DC measurements, observing polarity is important. If the needle deflects backward, reverse the test leads.
• Analog vs. Digital: Analog multimeters are great for observing trends and fluctuating signals, as the needle movement can show changes more dynamically than a digital display.

11. Garanție și asistență

For warranty information or technical support, please refer to the documentation provided at the point of purchase or contact your vendor. Keep your purchase receipt as proof of purchase.