ભાઈ HD-390D એનાલોગ મલ્ટિમીટર વપરાશકર્તા માર્ગદર્શિકા

1. પરિચય

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. સલામતી માહિતી

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.
• Do not exceed the maximum input ratings for any function.
• Use caution when working with live circuits. High voltages can be dangerous.
• Inspect test leads for damage before each use. Replace if insulation is cracked or wires are exposed.
• Ensure the battery cover is securely closed before operation.
• For continued protection against fire, replace fuses only with specified types: 0.5A/250V and 10A/250V.

3. પેકેજ સામગ્રી

ખાતરી કરો કે બધી વસ્તુઓ તમારા પેકેજમાં હાજર છે:

• Brother HD-390D Analog Multimeter
• ટેસ્ટ લીડ્સ (લાલ અને કાળા)
• ઓપરેટરની સૂચના માર્ગદર્શિકા
• Protective Carrying Case (may be included depending on variant)

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

4. ઉત્પાદન ઓવરview

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.

મુખ્ય ઘટકો:

• એનાલોગ ડિસ્પ્લે: Large, easy-to-read scale for measurement readings.
• રોટરી સ્વિચ: Selects measurement function (Voltage, Current, Resistance, Battery) and range.
• ઇનપુટ જેક્સ: Connect test leads. 'COM' for common (black lead), 'VΩmA+' for positive (red lead) for most measurements, '+10A' for high current measurements.
• Ω ADJ Knob: Used to zero the meter for resistance measurements.
• Transistor/Diode Test Sockets: Dedicated sockets for testing transistors (NPN/PNP hFE) and diodes.

5. સેટઅપ

5.1 બેટરી ઇન્સ્ટોલેશન

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

1. Locate the battery cover on the back of the multimeter.
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. બેટરી કવર સુરક્ષિત રીતે બંધ કરો.

Figure 5.1: Back panel with battery and fuse access.

૬.૨ કનેક્ટિંગ ટેસ્ટ લીડ્સ

Always connect the test leads correctly for accurate and safe measurements.

• 'COM' (સામાન્ય) જેકમાં બ્લેક ટેસ્ટ લીડ દાખલ કરો.
• મોટાભાગના માપ માટે (વોલ્યુમtage, 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. ઓપરેટિંગ સૂચનાઓ

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 ડીસી વોલ્યુમtage 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 અજ્ઞાત છે.
3. Connect the test probes in parallel across the component or circuit to be measured.
4. ભાગ વાંચોtage value from the appropriate DC V scale on the analog display.

6.2 એસી વોલ્યુમtage 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 અજ્ઞાત છે.
3. Connect the test probes in parallel across the component or circuit to be measured.
4. ભાગ વાંચોtage 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. મહત્વપૂર્ણ: 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. મહત્વપૂર્ણ: 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 Resistance Measurement (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. શૂન્ય ગોઠવણ: 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. બેટરી વોલ્યુમ વાંચોtage 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 સાતત્ય તપાસ

1. Set the rotary switch to the 'Continuity Check' position (often indicated by a speaker icon).
2. Connect the test probes across the circuit or component.
3. If the resistance is less than 200 Ohms, the beeper will sound, indicating continuity.

7. સ્પષ્ટીકરણો

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

આકૃતિ 7.1: DC વોલ્યુમtage સ્પષ્ટીકરણો.

આકૃતિ 7.2: AC વોલ્યુમtage, Current, Resistance, and other Specifications.

8. જાળવણી

8.1 સફાઈ

મલ્ટિમીટર સાફ કરવા માટે, કવરને જાહેરાતથી સાફ કરોamp કાપડ અને હળવું ડિટર્જન્ટ. ઘર્ષક પદાર્થો અથવા દ્રાવકોનો ઉપયોગ કરશો નહીં. સફાઈ કરતા પહેલા ખાતરી કરો કે ઉપકરણ બંધ છે અને કોઈપણ સર્કિટથી ડિસ્કનેક્ટ થયેલ છે.

8.2 બેટરી રિપ્લેસમેન્ટ

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 ફ્યુઝ રિપ્લેસમેન્ટ

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. બેટરી કવર સુરક્ષિત રીતે બંધ કરો.

9. મુશ્કેલીનિવારણ

• 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.
• Current measurement not working: 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. વપરાશકર્તા ટિપ્સ

• Always start with the highest range: જ્યારે અજ્ઞાત વોલ્યુમ માપવાtage 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.
• Observe polarity: 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. વોરંટી અને સપોર્ટ

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.