1. परिचय
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. सुरक्षितता माहिती
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.
- कोणत्याही फंक्शनसाठी कमाल इनपुट रेटिंग ओलांडू नका.
- Use caution when working with live circuits. High voltages धोकादायक असू शकते.
- Inspect test leads for damage before each use. Replace if insulation is cracked or wires are exposed.
- ऑपरेशन करण्यापूर्वी बॅटरी कव्हर सुरक्षितपणे बंद असल्याची खात्री करा.
- For continued protection against fire, replace fuses only with specified types: 0.5A/250V and 10A/250V.
3. पॅकेज सामग्री
तुमच्या पॅकेजमध्ये सर्व वस्तू आहेत का ते तपासा:
- Brother HD-390D Analog Multimeter
- चाचणी लीड्स (लाल आणि काळा)
- Operator's Instruction Manual
- Protective Carrying Case (may be included depending on variant)
Figure 3.1: Multimeter with test leads and optional carrying case.
व्हिडिओ १: अनबॉक्सिंग आणि सुरुवातीचा षटकview of the Brother HD-390D Analog Multimeter.
4. उत्पादन संपलेview
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.
मुख्य घटक:
- ॲनालॉग डिस्प्ले: Large, easy-to-read scale for measurement readings.
- रोटरी स्विच: Selects measurement function (Voltage, Current, Resistance, Battery) and range.
- इनपुट जॅक: 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. सेटअप
5.1 बॅटरी इंस्टॉलेशन
The multimeter requires two 1.5V AAA batteries and one 9V battery for operation. These are not included.
- Locate the battery cover on the back of the multimeter.
- Slide the cover down and open as indicated by the 'PULL DOWN' and 'OPEN' markings.
- Insert the two 1.5V AAA batteries and one 9V battery, observing correct polarity.
- बॅटरी कव्हर सुरक्षितपणे बंद करा.
Figure 5.1: Back panel with battery and fuse access.
४.२ चाचणी लीड्स कनेक्ट करणे
Always connect the test leads correctly for accurate and safe measurements.
- Insert the black test lead into the 'COM' (Common) jack.
- For most measurements (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. ऑपरेटिंग सूचना
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 डीसी व्हॉल्यूमtage Measurement (DC V)
- Connect the red lead to 'VΩmA+' and the black lead to 'COM'.
- 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 अज्ञात आहे.
- Connect the test probes in parallel across the component or circuit to be measured.
- खंड वाचाtage value from the appropriate DC V scale on the analog display.
6.2 एसी व्हॉल्यूमtage Measurement (AC V)
- Connect the red lead to 'VΩmA+' and the black lead to 'COM'.
- Set the rotary switch to the desired AC V range (e.g., 10V, 50V, 250V, 1000V). Start with the highest range if the voltage अज्ञात आहे.
- Connect the test probes in parallel across the component or circuit to be measured.
- खंड वाचाtage value from the appropriate AC V scale on the analog display.
6.3 DC Current Measurement (DC A)
- 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'.
- 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.
- महत्त्वाचे: Connect the multimeter in series with the circuit to be measured. Break the circuit and insert the meter.
- Read the current value from the appropriate DC A scale.
6.4 AC Current Measurement (AC A)
- 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'.
- 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.
- महत्त्वाचे: Connect the multimeter in series with the circuit to be measured. Break the circuit and insert the meter.
- Read the current value from the appropriate AC A scale.
५.४ प्रतिकार मापन (Ω)
- Connect the red lead to 'VΩmA+' and the black lead to 'COM'.
- Set the rotary switch to the desired Resistance range (e.g., X1, X10, X1K, X10K, X100K).
- शून्य समायोजन: 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.
- Connect the test probes across the component to be measured (ensure the component is de-energized).
- Read the resistance value from the Ohm scale and multiply by the selected range multiplier.
6.6 Battery Test (BATT)
- Connect the red lead to 'VΩmA+' and the black lead to 'COM'.
- Set the rotary switch to the 'BATT' function (1.5V or 9V).
- Connect the test probes to the battery terminals, observing polarity.
- बॅटरी व्हॉल्यूम वाचाtage from the appropriate battery scale.
6.7 Diode and Transistor Check
- Set the rotary switch to the 'Ω X 10' range for transistor and diode checks.
- For transistor hFE measurement, insert the transistor leads into the appropriate NPN or PNP sockets.
- For diode check, use the extra jack as indicated in the specifications.
6.8 सातत्य तपासणी
- Set the rotary switch to the 'Continuity Check' position (often indicated by a speaker icon).
- Connect the test probes across the circuit or component.
- If the resistance is less than 200 Ohms, the beeper will sound, indicating continuity.
7. तपशील
The following table details the technical specifications of the Brother HD-390D Analog Multimeter:
आकृती 7.1: DC Voltage तपशील.
आकृती 7.2: एसी व्हॉल्यूमtage, Current, Resistance, and other Specifications.
| वैशिष्ट्य | तपशील |
|---|---|
| एसी व्हॉलtage श्रेणी | 0.1V, 0.5V, 2.5V, 10V, 50V, 250V, 1000V |
| डीसी व्हॉलtage श्रेणी | 0.1V, 0.5V, 2.5V, 10V, 50V, 250V, 1000V |
| AC Current Ranges | 0.05mA, 0.25mA, 2.5mA, 25mA, 250mA, 10A |
| DC Current Ranges | 0.05mA, 0.25mA, 2.5mA, 25mA, 250mA, 10A |
| प्रतिकार श्रेणी | X1 (0.2 ~ 2KΩ), X10 (2 ~ 20KΩ), X1K (200 ~ 2MΩ), X10K (2K ~ 20MΩ), X100K (20K ~ 200MΩ) |
| बॅटरी चाचणी | 1.5V, 9V |
| ट्रान्झिस्टर तपासा | hFE: 0-1000 (via extra jack, at Ω X 10 Range) |
| डायोड तपासा | IF, IR, LI, LV (at Ω X 10 Range) |
| सातत्य तपासणी | Beeper sounding (<200 Ohm) |
| वीज पुरवठा | 2 x 1.5V AAA batteries, 1 x 9V battery |
| ऑपरेटिंग मोड | मॅन्युअल श्रेणी |
| प्रमाणन | CE |
| Standard Environmental Conditions | 23°C ± 5°C, humidity <75% RH |
| Working Environment Range | 0°C ~ 40°C, humidity <90% RH |
| परिमाण | 160 मिमी x 105 मिमी x 40 मिमी |
8. देखभाल
8.1 स्वच्छता
मल्टीमीटर साफ करण्यासाठी, जाहिरातीने केस पुसून टाकाamp cloth and a mild detergent. Do not use abrasives or solvents. Ensure the device is powered off and disconnected from any circuits before cleaning.
8.2 बॅटरी बदलणे
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 फ्यूज बदलणे
If the current measurement function stops working, the fuse may be blown. To replace the fuse:
- Ensure the multimeter is powered off and disconnected from all circuits.
- Open the battery cover on the back of the unit (refer to Figure 5.1).
- जुने फ्यूज काळजीपूर्वक काढून टाका.
- Replace with new fuses of the specified ratings: 0.5A/250V for mA ranges and 10A/250V for the 10A range.
- बॅटरी कव्हर सुरक्षितपणे बंद करा.
9. समस्या निवारण
- 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.
- सुई हलत नाही: Ensure the meter is powered on (if applicable for specific functions) and the test leads are making good contact.
१.६. वापरकर्ता टिपा
- Always start with the highest range: अज्ञात खंड मोजतानाtage 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.
- ध्रुवीयतेचे निरीक्षण करा: 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. हमी आणि समर्थन
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.
