1. ບົດແນະນຳ
This manual provides comprehensive instructions for the safe and effective operation, setup, and maintenance of the Dwyer 477B-3 Handheld Digital Manometer. The 477B-3 is designed for precise measurement of air pressure, offering high accuracy and internal memory for data storage.
2. ຂໍ້ມູນຄວາມປອດໄພ
Always observe the following safety precautions to prevent injury and avoid damage to the instrument:
- Do not exceed the specified pressure range of the device.
- Ensure proper connection of pressure tubing to avoid leaks or incorrect readings.
- Do not expose the manometer to extreme temperatures, humidity, or corrosive environments.
- Use only the specified battery type for replacement.
- ຮັກສາອຸປະກອນໃຫ້ສະອາດ ແລະບໍ່ມີສິ່ງເສດເຫຼືອ.
3. ຜະລິດຕະພັນເກີນview
The Dwyer 477B-3 is a robust handheld digital manometer encased in an aluminum housing. It features a clear digital display and intuitive button controls for various functions.
3.1 ກະດານດ້ານ ໜ້າ

ຮູບທີ 1: ດ້ານໜ້າ view of the Dwyer 477B-3 Digital Manometer, showing the digital display and control buttons.
ແຜງດ້ານຫນ້າປະກອບມີ:
- ຈໍດິຈິຕອນ: Shows pressure readings and operational indicators.
- ປຸ່ມເປີດ/ປິດ: ເປີດ ຫຼື ປິດອຸປະກອນ.
- ZERO/STORE Button: Zeros the reading or stores data in memory.
- HOLD/MEMORY Button: Holds the current reading or accesses stored data.
- UNITS/LOC Button: Changes measurement units or navigates memory locations.
3.2 ແຜງດ້ານຫຼັງ

ຮູບທີ 2: ກັບຄືນໄປບ່ອນ view of the Dwyer 477B-3 Digital Manometer, displaying key operating instructions and specifications.
The back panel provides quick reference operating instructions and device specifications. It also houses the pressure ports at the top and the battery compartment at the bottom.
4. ຕັ້ງຄ່າ
4.1 ການຕິດຕັ້ງຫມໍ້ໄຟ

ຮູບທີ 3: View of the battery compartment on the Dwyer 477B-3 Digital Manometer.
- Locate the battery compartment cover on the bottom rear of the manometer.
- Unscrew the retaining screws at the base of the instrument to remove the battery cover.
- Insert a 9V battery (e.g., DURACELL MN 1604, EVEREADY 522, or equivalent), observing correct polarity.
- ປ່ຽນຝາແບັດເຕີລີ່ ແລະຍຶດມັນດ້ວຍສະກູ.
4.2 ການເປີດເຄື່ອງເບື້ອງຕົ້ນ
After battery installation, press the ເປີດ/ປິດ button to power on the device. The display will illuminate, indicating the device is ready for use.
5. ຄໍາແນະນໍາການດໍາເນີນງານ
5.1 ON/OFF Function
- ກົດ ເປີດ/ປິດ button to toggle the device on and off.
- ອຸປະກອນຈະປິດໂດຍອັດຕະໂນມັດຫຼັງຈາກບໍ່ມີການເຄື່ອນໄຫວ 20 ນາທີເພື່ອປະຫຍັດອາຍຸການໃຊ້ງານຂອງແບັດເຕີຣີ.
- To illuminate the display during power-on, hold the ເປີດ/ປິດ ປຸ່ມ.
5.2 ຟັງຊັນ ZERO
- Vent both pressure ports to the atmosphere.
- ກົດຄ້າງໄວ້ ZERO/STORE button until the LCD displays "----", then release it. The manometer is now zeroed.
5.3 UNITS/LOC Function
- ກົດ UNITS/LOC button to cycle through and select desired measurement units.
5.4 HOLD/MEMORY Function
- Hold Reading: ກົດ HOLD/MEMORY button to hold the current reading on the display. Press it again to resume measurement.
- ຟັງຊັນຫນ່ວຍຄວາມຈໍາ:
- To store a reading, press and hold HOLD/MEMORY until "ST01" (or next available location) is displayed, then press ZERO/STORE. If needed, press UNITS/LOC to select another storage location before pressing ZERO/STORE.
- ເຖິງ view stored data, press and hold HOLD/MEMORY until "LOC" is displayed. If needed, press UNITS/LOC ກັບ view other memory locations.
- To exit memory mode, press HOLD/MEMORY ອີກເທື່ອຫນຶ່ງ.
- To clear all data, press and hold HOLD/MEMORY until "CLR" is displayed, then press ZERO/STORE.
5.5 ງAMPING Function
- ກົດຄ້າງໄວ້ HOLD/MEMORY until "DAMP" is displayed, then release the HOLD/MEMORY ປຸ່ມ.
- ກົດ ZERO/STORE or UNITS/LOC to adjust the damping level from 1 to 8 (default is 3).
- To exit dampໂໝດຢູ່ໃນ, ກົດ HOLD/MEMORY ອີກເທື່ອຫນຶ່ງ.
6. ບໍາລຸງຮັກສາ
6.1 ການທໍາຄວາມສະອາດ
Wipe the exterior of the manometer with a soft, damp cloth. Do not use abrasive cleaners or solvents, as these may damage the housing or display.
6.2 ການທົດແທນຫມໍ້ໄຟ
When the "LOW BAT" indicator appears on the display, replace the 9V battery as described in Section 4.1. Prompt battery replacement ensures continued accurate operation.
7. ການແກ້ໄຂບັນຫາ
| ບັນຫາ | ສາເຫດທີ່ເປັນໄປໄດ້ | ການແກ້ໄຂ |
|---|---|---|
| ອຸປະກອນບໍ່ເປີດ. | ແບັດເຕີຣີຕາຍ ຫຼື ຕິດຕັ້ງບໍ່ຖືກຕ້ອງ. | Replace battery, ensuring correct polarity. |
| ການອ່ານບໍ່ຖືກຕ້ອງ ຫຼືປ່ຽນແປງ. | Manometer not zeroed; pressure leaks; unstable pressure source. | Perform ZERO function; check all tubing connections for leaks; ensure stable pressure source. |
| ສະແດງຕົວຊີ້ບອກ "LOW BAT" ຂຶ້ນ. | ແບັດເຕີຣີເຫຼືອໜ້ອຍ. | ປ່ຽນແບັດເຕີຣີ 9V. |
8. ຂໍ້ມູນຈໍາເພາະ
- ຕົວແບບ: 477B-3
- ຊ່ວງ: 0 to 200" wc (0 to 49.82 kPa)
- ຄວາມຖືກຕ້ອງ: ±0.1% FS
- ວັດສະດຸທີ່ຢູ່ອາໄສ: ອາລູມີນຽມ
- ໜ່ວຍຄວາມຈຳ: 40 ການອ່ານ
- ແຫຼ່ງພະລັງງານ: 9V battery (DURACELL MN 1604, EVEREADY 522, or equivalent)
- ຜູ້ຜະລິດ: Dwyer
- UPC: 782568954475
9. ການຮັບປະກັນແລະການສະຫນັບສະຫນູນ
Specific warranty information for the Dwyer 477B-3 Digital Manometer is not provided in the product data. Please refer to the official Dwyer website or contact your authorized dealer for detailed warranty terms and conditions.
For technical support or service inquiries, please contact Dwyer Instruments, Inc. directly or consult their official documentation.





