Dwyer Instruments 477AV-000 Specifications-Installation And Operating Instructions

The Series 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
condition. 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 over flow, over pressure
or over velocity.
Velocity Range Available Pressure Units
Model Pressure Range fpm
477AV-000 0-1.000 in w.c. 0-4004
477AV-00 0-4.000 in w.c. 0-8009
477AV-0 0-10.00 in w.c. 0-1.266k
477AV-1 0-20.00 in w.c. 0-1.791k
477AV-2 0-40.00 in w.c. 0-1.791k
477AV-3 0-200.0 in w.c. 0-56.63k
477AV-4 0-10.00 psi 0-66.62k
477AV-5 0-20.00 psi 0-94.22k
477AV-6 0-30.00 psi 0-115.4k
477AV-7 0-100.0 psi 0-210.7k
477AV-8 0-150.0 psi 0-258.0k
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.
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
Series 477AV Handheld Digital Manometer
Specifications - Installation and Operating Instructions
m/s psi in Hg kPa in w.c.
20.34 0.0736 0.2491 1.000
40.69 0.1445 0.2942 0.996 4.000
64.33 0.3613 0.7355 2.491 10.00
90.97 0.7225 1.471 4.982 20.00
128.7 1.445 2.942 9.96 40.00
287.7 7.225 14.71 49.82 200.0
338.4 10.00 20.36 68.95 276.8
478.6 20.00 40.72 137.9 553.6
586.2 30.00 61.08 206.9 830.4
1070 100.0 203.6 689.5 2768
1311 150.0 305.4 1034 4152
QualityInstruments-Direct
41/64
[16.27]
29/32
[23.02]
SPECIFICATIONS
Service: Air and compatible gases.
Wetted Materials: Consult factory.
Accuracy: ±0.5% FS, 60 to 78°F
(15.6 to 25.6°C); ±1.5% FS from 32 to
60°F and 78 to 104°F (0 to 15.6°C
and 25.6 to 40.0°C).
Pressure Hysteresis: ±0.1% of full-
scale.
Pressure Limits: See chart.
Temperature Limits: 0 to 140°F
(-17.8 to 60°C).
Compensated Temperature Limits:
32 to 104°F (0 to 40°C).
Storage Temperature Limits: -4 to
176°F (-20 to 80°C).
Display: 0.42˝ (10.6 mm) 4 digit LCD.
Resolution: See chart.
mm Hg mbar mm w.c.
Pa ft w.c.
1.868 2.491 25.40
249.1 0.0833
7.473 9.96 101.6
996 0.3333
18.68 24.91 254.0
2491 0.8333
37.36 49.82 508.0
4982 1.667
74.73 99.6 1016
9964 3.333
373.6 498.2 5080
16.67
517.1 689.5 7031
13.07
1034 1379
46.13
1551 2069
69.20
5171 6895
230.7
7757
346.0
Phone: 219/879-8000
Fax: 219/872-9057
Bulletin TE-477AV-1
2-13/16 [71.44]
1-1/16
[26.99]
BARBED FOR
1/8 OR 3/16
ID TUBING
5-57/64
[149.68]
Units of Pressure: in w.c., ft. w.c., in
Hg, psi, oz/in , mm w.c., cm w.c., mm
2
Hg, mbar, Pa, kPa, hPa.
Units of Velocity: fpm, fps, mph, m/h,
m/s, k/h, knot.
Units of Flow: cfm, m3/h, m3/s.
Power Requirements: 9 V Alkaline
battery, installed non-functional, user
replaceable.
Weight: 10.2 oz (289 g).
Process Connections: Two barbed
connections for use with 1/8˝ (3.18
mm) or 3/16˝ (4.76 mm) ID tubing.
Two compression fittings for use with
1/8˝ (3.18 mm) ID x 1/4˝ (6.35 mm)
OD tubing for 477AV-7 and 477AV-8
only.
Agency Approvals: CE.
Maximum
Pressure
oz/in hPa cm w.c.
2
5 psig
0.5780 2.491 2.540
5 psig
2.312 9.964 10.16
5 psig
5.780 24.91 25.40
10 psig
11.56 49.82 50.80
10 psig
23.12 99.64 101.6
30 psig
115.6 498.2 508.0
30 psig
160.0 689.5 703.1
60 psig
320.0 1379 1406
60 psig
480.0 2068 2109
150 psig
1600 6895 7031
200 psig
2400
www.dwyer-inst.com
e-mail: info@dwyermail.com
1.800.868.7495
.ca