1. ບົດແນະນຳ
The Dwyer 475-1-FM Handheld Digital Manometer is designed for fast, accurate positive, negative, and differential pressure measurements. This device is suitable for use with air and compatible combustible gases. Its robust design and intrinsic safety features make it ideal for various industrial and scientific applications, including HVAC system monitoring, clean rooms, fume hoods, and isolation cabinets.
2. ຂໍ້ມູນຄວາມປອດໄພ
2.1 Intrinsically Safe Operation
The Dwyer 475 Series Manometer is FM-approved intrinsically safe for Class 1, Div. 1, Group A, B, C, D, T4 hazardous locations. Adhere to all local and national safety regulations when operating in such environments.
2.2 Gas Compatibility
This manometer is compatible with air and compatible combustible gases. Do not use with incompatible or corrosive gases, as this may damage the instrument and pose a safety risk. Always verify gas compatibility before connecting the manometer.
2.3 ຂໍ້ຄວນລະວັງທົ່ວໄປ
- Ensure the manometer is in good working condition before each use.
- ຫຼີກລ້ຽງການຫຼຸດລົງຫຼືອຸປະກອນທີ່ມີການກະທົບຢ່າງຮຸນແຮງ.
- Do not attempt to open or repair the unit yourself, as this may void the warranty and compromise intrinsic safety.
- ຮັກສາອຸປະກອນໃຫ້ຫ່າງຈາກອຸນຫະພູມສູງສຸດ ແລະ ຄວາມຊຸ່ມຊື່ນ.
3. ເນື້ອໃນຊຸດ
ກວດສອບວ່າລາຍການທັງຫມົດທີ່ລະບຸໄວ້ຂ້າງລຸ່ມນີ້ແມ່ນມີຢູ່ໃນຊຸດຂອງທ່ານ:
- Dwyer 475-1-FM Handheld Digital Manometer
- Rubber Latex Tubing (3/16 inch ID, 9 foot length)
- ສາຍຮັດຂໍ້ມື
- ແບດເຕີຣີ້ມາດຕະຖານ 9V
- ຄໍາແນະນໍາການດໍາເນີນງານ (ຄູ່ມືນີ້)
Image: The Dwyer 475-1-FM Digital Manometer shown alongside the included rubber latex tubing. The manometer features a digital display and control buttons for ON/OFF, ZERO, and UNITS.
4. ຕັ້ງຄ່າ
4.1 ການຕິດຕັ້ງຫມໍ້ໄຟ
- Locate the battery compartment cover on the back of the manometer.
- ເອົາຝາປິດອອກ.
- Insert the supplied 9V alkaline battery, ensuring correct polarity.
- ປ່ຽນຝາປິດຊ່ອງໃສ່ຫມໍ້ໄຟໃຫ້ປອດໄພ.
4.2 Tubing Connection
The manometer features two barbed connections for tubing. These connections accept 1/8" (3.18 mm) or 3/16" (4.76 mm) I.D. tubing.
- For positive pressure, connect the tubing from the pressure source to the positive (+) port.
- For negative pressure (vacuum), connect the tubing from the vacuum source to the negative (-) port.
- For differential pressure, connect the higher pressure source to the positive (+) port and the lower pressure source to the negative (-) port.
- Ensure tubing connections are snug to prevent leaks.
5. ຄໍາແນະນໍາການດໍາເນີນງານ
5.1 ການເປີດ/ປິດ
- ກົດ ເປີດ/ປິດ ປຸ່ມເພື່ອເປີດອຸປະກອນ.
- ກົດ ເປີດ/ປິດ button again to power off the device.
5.2 Auto Zero Function
Before taking a measurement, it is crucial to zero the instrument for accuracy.
- Ensure both pressure ports are open to atmospheric pressure (disconnected from any pressure source).
- ກົດ ZERO button. The display will show '0.00' or a similar indication, confirming the zeroing process.
5.3 Pressure Unit Selection
The manometer allows selection between U.S. and metric pressure units.
- ກົດ ໜ່ວຍ button to cycle through available pressure units (e.g., in. w.c., kPa).
- ເລືອກຫົວໜ່ວຍທີ່ຕ້ອງການສຳລັບການວັດແທກຂອງທ່ານ.
5.4 ການວັດແທກ
- Perform the Auto Zero function as described in Section 5.2.
- Connect the tubing to the appropriate pressure source(s) as described in Section 4.2.
- The large LCD will display the pressure reading in the selected units.
- The manometer can display positive, negative, or differential pressures.
6. ບໍາລຸງຮັກສາ
6.1 ການທໍາຄວາມສະອາດ
Wipe the exterior of the manometer with a soft, damp ຜ້າ. ຢ່າໃຊ້ນໍ້າຢາທໍາຄວາມສະອາດທີ່ມີສີຂັດ ຫຼື ຕົວລະລາຍ, ເພາະວ່າສິ່ງເຫຼົ່ານີ້ອາດຈະທໍາລາຍ c ໄດ້.asing ຫຼືສະແດງ.
6.2 ການທົດແທນຫມໍ້ໄຟ
When the battery indicator appears on the display, replace the 9V alkaline battery following the steps in Section 4.1. A fresh battery provides up to 100 hours of operation.
6.3 ການເກັບຮັກສາ
Store the manometer in a dry, cool place, away from direct sunlight and extreme temperatures. Disconnect tubing and remove the battery if storing for extended periods to prevent leakage.
7. ການແກ້ໄຂບັນຫາ
| ບັນຫາ | ສາເຫດທີ່ເປັນໄປໄດ້ | ການແກ້ໄຂ |
|---|---|---|
| ບໍ່ມີການສະແດງຜົນເມື່ອເປີດເຄື່ອງ | ແບດເຕີລີ່ຕາຍຫຼືຕິດຕັ້ງບໍ່ຖືກຕ້ອງ | Check battery polarity or replace with a new 9V battery. |
| ການອ່ານບໍ່ຖືກຕ້ອງ | Not zeroed correctly; Tubing leaks; Sensor issue | Perform Auto Zero function. Check tubing for kinks or leaks. If problem persists, contact support. |
| Display shows 'OVER' or 'UNDER' | Pressure exceeds or is below measurement range | Ensure the applied pressure is within the 0-20.00" w.c. range. |
8. ຂໍ້ມູນຈໍາເພາະ
- ຊ່ວງຄູ່: 0-20.00" w.c. (4.982 kPa)
- ຄວາມຖືກຕ້ອງ:
- ±0.5% Full Scale, 60 to 78°F (15.6 to 25.6°C)
- ±1.5% Full Scale, 32 to 60°F and 78 to 104°F (0 to 15.6°C and 25.6 to 40°C)
- Pressure Hysteresis: ±0.1% ຂອງຂະໜາດເຕັມ
- ຂີດຈຳກັດອຸນຫະພູມ: 0 ຫາ 140 ° F (-17.8 ຫາ 60 ° C)
- ຂີດຈຳກັດອຸນຫະພູມທີ່ໄດ້ຮັບຄ່າຕອບແທນ: 32 ຫາ 104°F (0 ຫາ 40°C)
- ຂີດຈຳກັດອຸນຫະພູມການເກັບຮັກສາ: -4 ຫາ 176 ° F (-20 ຫາ 80 ° C)
- ຈໍສະແດງຜົນ: 0.42" (10.6 mm) 4-digit LCD
- ຄວາມຕ້ອງການພະລັງງານ: 9V alkaline battery (user replaceable)
- ນ້ຳໜັກ: 10.8 ອໍ. (306 g)
- ຂະບວນການເຊື່ອມຕໍ່: Two barbed connections for 1/8" (3.18 mm) or 3/16" (4.76 mm) I.D. tubing
- ບໍລິການ: Air and compatible combustible gases
- ການອະນຸມັດອົງການ: CE, FM (Intrinsically Safe for Class 1, Div. 1, Group A, B, C, D, T4 hazardous locations)
- ຂະໜາດ: 6.5 x 3.5 x 0.75 ນິ້ວ
- ວັດສະດຸ: Latex, Rubber (for tubing)
9. ການຮັບປະກັນແລະການສະ ໜັບ ສະ ໜູນ
9.1 ຂໍ້ມູນການຮັບປະກັນ
Dwyer Instruments, Inc. warrants this product to be free from defects in material and workmanship for a period of one year from the date of purchase. For full warranty details and conditions, please refer to the official Dwyer Instruments webເວັບໄຊທ໌ຫຼືຕິດຕໍ່ສະຫນັບສະຫນູນລູກຄ້າ.
9.2 ສະຫນັບສະຫນູນດ້ານວິຊາການ
For technical assistance, troubleshooting beyond this manual, or to inquire about repairs, please contact Dwyer Instruments customer service. Contact information can typically be found on the manufacturer's official webສະຖານທີ່ຫຼືຢູ່ໃນການຫຸ້ມຫໍ່ຜະລິດຕະພັນ.
