Description
Dwyer 477AV-7
- Airflow monitoring, when used with a Dwyer pitot tube
- Duct static pressure
- Commercial air balancing
- Building-zone pressure
Handheld Digital Manometer, 0-100.00 psi, air velocity/flow modes.
The Dwyer 477AV Handheld Digital Manometer is available with pressure, flow, and velocity measurements along with a number of other features. The 477AV uses a highly accurate differential pressure sensor to offer ± 0.5% full-scale accuracy. It displays negative, positive, and differential pressure. For pressure, flow, and velocity there are selectable English and metric units, as seen in the model chart below. The built-in air velocity and volumetric flow calculations conserve time associated with cumbersome manual calculations. Additionally, up to 40 readings can be saved-perfect for HVAC technicians making Pitot tube traverses of airflow readings across a duct. The accuracy that the 477AV Series provides is critical to maintenance personnel and technicians who require a highly accurate standard to check their instrumentation or equipment, to ensure proper performance.
The digital display offers a backlight feature for easier viewing in darker areas. Meanwhile, battery conservation is monitored and displayed in the event of low battery conditions. The digital manometer will automatically shut off after 20 minutes to prevent battery drain. This shut-off time can be reduced or disabled if desired. Series 477AV can be field-calibrated by setting zero & span values. Furthermore, the damping feature compensates for the fluctuating readings by averaging input values to display a more stable readout. Included is an audible and visual alarm to warn overflow, overpressure or over velocity.
Displaying Pressure, Velocity, and Flow
The instrument measures pressure using a piezoelectric sensor. When the 477AV is powered on the pressure value and the unit of measurement will be shown. If you select the velocity or flow mode, then velocity or flow will be displayed instead. The mode selection will persist even after the instrument is turned off. In velocity and flow modes, if the reading exceeds 9,999, then a “K” will be displayed next to the unit of measurement and the display will read in units of 1,000 times the original unit of measurement.
HVAC Equipment and Instruments/Manometer Template | |
|---|---|
| Type (Manometer) | Digital |
| Engineering Units (HVAC) | hPa, inch Hg, kPa, mbar, mmHg, psi Engineering Units (HVAC) in w.c., ft. w.c., psi, oz/in², mm w.c., cm w.c., mm Hg, Pa, hPa, fpm, fps, mph, m/h, m/s, k/h, knot, cfm, m3/h, m3/s. |
| Min/Max/Hold | Yes |
Product General Attributes | |
| Unique Features | 0-100.00 psi Range Air velocity/Flow modes |
| Warranty | 1 YEARS |
| Warranty Details | The Seller warrants all Dwyer Instruments and equipment to be free from defects in workmanship or material under normal use and service for a period of one year from date of shipment. Liability under this warranty is limited to repair or replacement EXW Ex Works Dwyer Instruments, Inc. of any parts which prove to be defective within that time or repayment of the purchase price at the Seller’s option provided the instruments have been returned, transportation prepaid, within one year from date of purchase. All technical advice, recommendations and services are based on technical data and information which the Seller believes to be reliable and are intended for use by persons having skill and knowledge of the business, at their own discretion. In no case is Seller liable beyond replacement of equipment EXW Ex Works Dwyer Instruments, Inc. or the full purchase price. This warranty does not apply if the maximum ratings label is removed or if the instrument or equipment is abused/altered. |
| Safety Approval | CE, RoHS |
| Product Weight | 289 GRAMS (0.637 LBS) |
| Product Height | 2.20 IN |
| Product Length | 10.60 IN |
| Product Width | 7.00 IN |
| Shipping Weight | 1 LBS |
| HTS/Schedule B Number | 9026.20.0000 |
| ECCN Number | EAR99 |
| Battery Type | 9v |
| Power Supply Voltage | Battery Powered |
| Country of Origin | United States |
| Shipping Height | 2.20 IN |
| Shipping Length | 10.60 IN |
| Shipping Width | 7.00 IN |
| Other Information | Dimensions:: 149.68 x 71.44 x 23.02 mm |
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