1. Ifihan
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. Alaye Aabo
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.
- Jeki ẹrọ naa di mimọ ati ofe kuro ninu idoti.
3. Ọja Ipariview
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 Igbimọ iwaju

Nọmba 1: Iwaju view of the Dwyer 477B-3 Digital Manometer, showing the digital display and control buttons.
Panel iwaju pẹlu:
- Ifihan Digital: Shows pressure readings and operational indicators.
- Bọtini TAN/PA: Fi agbara ẹrọ si tan tabi pa.
- 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 Pada Panel

Nọmba 2: Pada 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. Eto
4.1 Fifi sori batiri

Nọmba 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.
- Rọpo ideri batiri naa ki o si fi awọn skru so o mọ.
4.2 Ibẹrẹ Agbara-On
Lẹhin fifi batiri sii, tẹ bọtini naa TAN/PA button to power on the device. The display will illuminate, indicating the device is ready for use.
5. Awọn ilana Iṣiṣẹ
5.1 ON/OFF Function
- Tẹ awọn TAN/PA button to toggle the device on and off.
- The device will automatically shut off after 20 minutes of inactivity to conserve battery life.
- To illuminate the display during power-on, hold the TAN/PA bọtini.
5.2 ZERO Function
- Vent both pressure ports to the atmosphere.
- Tẹ mọlẹ ZERO/STORE button until the LCD displays "----", then release it. The manometer is now zeroed.
5.3 UNITS/LOC Function
- Tẹ awọn UNITS/LOC button to cycle through and select desired measurement units.
5.4 HOLD/MEMORY Function
- Di Kíkà Mú: Tẹ awọn HOLD/MEMORY button to hold the current reading on the display. Press it again to resume measurement.
- Iṣẹ Iranti:
- 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.
- Si view stored data, press and hold HOLD/MEMORY until "LOC" is displayed. If needed, press UNITS/LOC si view other memory locations.
- To exit memory mode, press HOLD/MEMORY lẹẹkansi.
- To clear all data, press and hold HOLD/MEMORY until "CLR" is displayed, then press ZERO/STORE.
5.5 DAMPING Function
- Tẹ mọlẹ HOLD/MEMORY until "DAMP" is displayed, then release the HOLD/MEMORY bọtini.
- Tẹ ZERO/STORE or UNITS/LOC to adjust the damping level from 1 to 8 (default is 3).
- To exit damping mode, tẹ HOLD/MEMORY lẹẹkansi.
6. Itọju
6.1 Ninu
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 Batiri Rirọpo
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. Laasigbotitusita
| Isoro | Owun to le Fa | Ojutu |
|---|---|---|
| Ẹrọ naa ko ṣiṣẹ. | Batiri ti ku tabi ti ko tọ. | Replace battery, ensuring correct polarity. |
| Awọn kika ti ko pe tabi iyipada. | Manometer not zeroed; pressure leaks; unstable pressure source. | Perform ZERO function; check all tubing connections for leaks; ensure stable pressure source. |
| "LOW BAT" indicator displayed. | Batiri naa kere. | Rọpo batiri 9V naa. |
8. Awọn pato
- Awoṣe: 477B-3
- Ibiti: 0 to 200" wc (0 to 49.82 kPa)
- Yiye: ± 0.1% FS
- Ohun elo Ile: Aluminiomu
- Iranti: 40 kika
- Orisun Agbara: 9V battery (DURACELL MN 1604, EVEREADY 522, or equivalent)
- Olupese: Dwyer
- UPC: 782568954475
9. Atilẹyin ọja ati Support
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.





