ຄູ່ມືຜູ້ໃຊ້ເຄື່ອງວັດໄຟຟ້າດິຈິຕອລ Mastech M300 ຂະໜາດນ້ອຍ

1. ບົດແນະນຳ

The Mastech M300 is a compact, 13-range mini digital multimeter designed for basic electrical measurements. It is capable of measuring AC/DC voltage up to 500 volts, DC current up to 200 mA, resistance, diode continuity, and features a buzzer for continuity checks. Its attached test leads make it highly portable and convenient for various applications.

2. ຂໍ້ມູນຄວາມປອດໄພ

WARNING: To avoid electrical shock, remove input leads before opening the case. To prevent fire, install the fuse with the specified amp/ການໃຫ້ຄະແນນແຮງດັນ.

• Always ensure the multimeter is set to the correct range before making measurements.
• ຢ່າພະຍາຍາມວັດແທກ voltages ຫຼື ກະແສໄຟຟ້າເກີນຂອບເຂດສູງສຸດທີ່ລະບຸໄວ້.
• ໃຫ້ລະມັດລະວັງທີ່ສຸດເມື່ອເຮັດວຽກກັບວົງຈອນທີ່ມີຊີວິດ.
• ກວດສອບສາຍທົດສອບເພື່ອກວດສອບຄວາມເສຍຫາຍກ່ອນການນຳໃຊ້ແຕ່ລະຄັ້ງ. ຢ່າໃຊ້ຖ້າການກັນຄວາມຮ້ອນເສຍຫາຍ.
• Never open the multimeter casing unless absolutely necessary for maintenance (e.g., fuse replacement) and ensure it is disconnected from all power sources.
• This device is rated for CAT III 600V.

ຮູບ 2.1: ດ້ານຫລັງ view of the Mastech M300 multimeter, displaying important safety warnings regarding electrical shock and fuse specifications. The battery compartment is also visible.

3. ຄຸນລັກສະນະຂອງຜະລິດຕະພັນ

• ມາດຕະການ AC/DC Voltage ເຖິງ 500V.
• Measures DC Current up to 200mA.
• Measures Resistance (0-2MΩ).
• Diode and Continuity Test with Buzzer.
• ການໃຊ້ພະລັງງານຕໍ່າສໍາລັບອາຍຸການຂະຫຍາຍຂອງຫມໍ້ໄຟ.
• Overload indication for safety.
• Integrated test leads for convenience.

ຮູບ 3.1: ດ້ານຫນ້າ view of the Mastech M300 Mini Digital Multimeter, showing the LCD display, rotary switch, function buttons, and integrated red and black test leads.

4. ເນື້ອໃນຊຸດ

ເມື່ອເປີດແພັກເກັດ, ກະລຸນາກວດສອບວ່າສິນຄ້າທັງໝົດມີຢູ່ ແລະ ບໍ່ເສຍຫາຍ:

• Mastech M300 Mini Digital Multimeter (with attached test leads)
• SR44 3V Batteries (x2, pre-installed)
• ຄູ່ມືຜູ້ໃຊ້

5. ຕັ້ງຄ່າ

5.1 ການຕິດຕັ້ງ/ປ່ຽນແບັດ

The Mastech M300 uses two SR44 3V batteries, which are typically pre-installed. If replacement is needed:

1. ໃຫ້ແນ່ໃຈວ່າມັນຕິມີເຕີປິດຢູ່ ແລະ ຖອດສາຍທົດສອບທັງໝົດອອກຈາກວົງຈອນໃດໆ.
2. Locate the battery compartment on the back of the unit (refer to Figure 2.1).
3. ເປີດຝາປິດຊ່ອງໃສ່ຫມໍ້ໄຟຢ່າງລະມັດລະວັງ.
4. Remove the old batteries and insert new SR44 3V batteries, observing the correct polarity (+/-).
5. ປິດຝາປິດຝາຫມໍ້ໄຟ.

5.2 ການເຊື່ອມຕໍ່ຜູ້ນໍາການທົດສອບ

The Mastech M300 features integrated test leads. Ensure they are securely attached to the meter and free from any damage before use.

6. ຄໍາແນະນໍາການດໍາເນີນງານ

Before making any measurement, ensure the multimeter is set to the appropriate function and range. The rotary switch is used to select the desired measurement type.

6.1 ການວັດແທກ DC Voltagອີ (ວີ–)

1. ຕັ້ງສະວິດ rotary ເປັນ DC Vol ທີ່ຕ້ອງການtage range (e.g., 500V, 200V, 20V, 2V, 200mV). Start with the highest range if the voltage ແມ່ນບໍ່ຮູ້ຈັກ.
2. ເຊື່ອມຕໍ່ສາຍທົດສອບສີແດງເຂົ້າກັບດ້ານບວກ (+) ຂອງວົງຈອນ ແລະ ສາຍທົດສອບສີດຳເຂົ້າກັບດ້ານລົບ (-).
3. ອ່ານ voltage ມູນຄ່າຢູ່ໃນຈໍສະແດງຜົນ LCD.

6.2 ການວັດແທກ AC Voltagອີ (ວີ∼)

1. ຕັ້ງຄ່າສະຫຼັບ rotary ກັບ AC Vol ທີ່ຕ້ອງການtage range (e.g., 500V, 200V). Start with the highest range if the voltage ແມ່ນບໍ່ຮູ້ຈັກ.
2. ເຊື່ອມຕໍ່ຕົວນໍາການທົດສອບໃນທົ່ວ AC voltage ແຫຼ່ງ.
3. ອ່ານ voltage ມູນຄ່າຢູ່ໃນຈໍສະແດງຜົນ LCD.

6.3 Measuring DC Current (A–)

CAUTION: To measure current, the multimeter must be connected in series with the circuit. Never connect the multimeter in parallel across a voltage source when in current mode, as this can damage the meter and the circuit.

1. Set the rotary switch to the desired DC Current range (e.g., 200mA, 20mA, 2mA, 200µA).
2. Break the circuit where you want to measure current.
3. Connect the red test lead to the higher potential side of the break and the black test lead to the lower potential side, completing the circuit through the multimeter.
4. ອ່ານຄ່າປັດຈຸບັນຢູ່ໃນຈໍສະແດງຜົນ LCD.

6.4 ການວັດແທກຄວາມຕ້ານທານ (Ω)

CAUTION: Ensure the circuit or component is completely de-energized before measuring resistance. Measuring resistance on a live circuit can damage the multimeter.

1. Set the rotary switch to the desired Resistance range (e.g., 2MΩ, 200kΩ, 20kΩ, 2kΩ, 200Ω).
2. Connect the test leads across the component whose resistance you wish to measure.
3. ອ່ານຄ່າຄວາມຕ້ານທານໃນຈໍສະແດງຜົນ LCD.

6.5 ທົດສອບ Diode

1. Set the rotary switch to the Diode symbol (→|–).
2. Connect the red test lead to the anode of the diode and the black test lead to the cathode. The display will show the forward voltage ຫຼຸດລົງ.
3. ປີ້ນສາຍໄຟ. ຈໍສະແດງຜົນຄວນສະແດງ 'OL' (Open Loop) ສຳລັບໄດໂອດທີ່ດີ.

6.6 ການທົດສອບຄວາມຕໍ່ເນື່ອງ

1. ຕັ້ງສະວິດໝຸນໄປທີ່ສັນຍາລັກຄວາມຕໍ່ເນື່ອງ (♫).
2. Connect the test leads across the component or wire you wish to test.
3. If there is continuity (low resistance), the buzzer will sound, and the display will show a low resistance value. If there is no continuity, the display will show 'OL'.

7. ບໍາລຸງຮັກສາ

7.1 ການທໍາຄວາມສະອາດ

ເພື່ອເຮັດຄວາມສະອາດ multimeter, ເຊັດກໍລະນີທີ່ມີໂຄສະນາamp cloth and a mild detergent. Do not use abrasives or solvents. Ensure the unit is completely dry before use.

7.2 ການທົດແທນຟິວ

If the current measurement function stops working, the fuse may need replacement. Refer to the safety warnings on the back of the unit for fuse specifications (F 250mA/250V).

1. ໃຫ້ແນ່ໃຈວ່າມັນຕິມີເຕີປິດຢູ່ ແລະ ຖອດສາຍທົດສອບທັງໝົດອອກ.
2. Open the multimeter casing (this typically involves removing screws on the back).
3. Locate the fuse and carefully remove it.
4. Replace with a fuse of the exact same type and rating (F 250mA/250V).
5. Securely close the casing.

8. ການແກ້ໄຂບັນຫາ

• ບໍ່ມີຈໍສະແດງຜົນ / ຈໍສະແດງຜົນຈາງລົງ: ກວດສອບການສາກໄຟຂອງແບັດເຕີຣີ. ປ່ຽນແບັດເຕີຣີຖ້າຈຳເປັນ.
• ການອ່ານທີ່ບໍ່ຖືກຕ້ອງ: Ensure the rotary switch is set to the correct function and range. Verify test lead connections. Ensure the circuit is de-energized for resistance measurements.
• ບໍ່ມີການວັດແທກກະແສໄຟຟ້າ: Check the fuse. Replace if blown (refer to Section 7.2).
• ຈໍສະແດງຜົນ 'OL' (ໂອເວີໂຫຼດ): The measured value exceeds the selected range. Switch to a higher range or verify the circuit.

9. ຂໍ້ມູນຈໍາເພາະ

10. ການຮັບປະກັນແລະການສະຫນັບສະຫນູນ

This Mastech M300 Mini Digital Multimeter comes with a ຮັບປະກັນ 1 ປີ ຈາກວັນທີ່ຊື້, ກວມເອົາຂໍ້ບົກພ່ອງການຜະລິດ. ກະລຸນາຮັກສາຫຼັກຖານການຊື້ຂອງທ່ານສໍາລັບການຮຽກຮ້ອງການຮັບປະກັນ.

For technical support, warranty service, or inquiries, please contact Mastech customer service through their official webເວັບໄຊທ໌ຫຼືຮ້ານຂາຍຍ່ອຍບ່ອນທີ່ຜະລິດຕະພັນໄດ້ຖືກຊື້.