Omega 477AV User guide

SERIES 477AV | HANDHELD DIGITAL MANOMETER

®

BENEFITS/FEATURES

•Calculatesanddisplaysairvelocityandvolumetricairow

• Rugged aluminum case protects instrument from damage during transport/use

• 9 selectable English and metric engineering units

•Large,easytoreaddisplaywithbacklightforuseindarkareas

•Storesupto40readingswithminimum,maximum,andaveragestatistics

•Convenientall-in-oneairvelocitykitoptionavailable

• Air ow monitoring, when used with a Dwyer® pitot tube

• Duct static pressure

• Commercial air balancing

• Building-zone pressure

SPECIFICATIONS

Service Air and compatible gases.

Wetted Materials Consult factory.

Accuracy ±0.5% FS from 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°C).

Pressure Hysteresis ±0.1% FS.

Pressure Limits See chart on page 2.

Temperature Limits 0 to 140°F (-17.8 to 60°C).

Compensated Temperature

Storage Temperature Limits -4 to 176°F (-20 to 80°C).

Display 0.42˝ (10.6 mm) 4 digit LCD.

Resolution See chart on page 2.

Units of Pressure in w.c., ft w.c., in Hg, psi, oz/in

Units of Velocity fpm, fps, mph, m/h, m/s, k/h, knot.

UnitsofFlow cfm, m

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 ttings for use

Agency Approvals CE.

32 to 104°F (0 to 40°C).

Limits

3

/h, m3/s.

with 1/8˝ (3.18 mm) ID x 1/4˝ (6.35 mm) OD tubing for 477AV-7, -8 only.

DESCRIPTIONAPPLICATIONS

The Series 477AV Handheld Digital Manometer is now available with pressure, ow,
and velocity measurements along with a number of other convenient features. The built-in

air velocity and ow calculations provide accuracy and conserve time and error associated

with manual calculations. Also featured on this unit are adjustable zero and span values

for calibrating in the eld as well as a damping feature to compensate for the uctuating of

readings.

Air velocity kits include: Series 477AV handheld digital manometer, Model 166T 36˝ telescoping
pitot tube, (2) A-303 static pressure tips, (2) 4-1/2´ lengths 3/16˝ ID rubber tubing, A-397 step
drill for 3/16˝ to 1/2˝ holes, A-532 AV slide chart, and tted polyethylene case.

2

, mm w.c., cm w.c., mm Hg, mbar, Pa, kPa, hPa.

DIMENSIONS MAXIMUM PRESSURE / RESOLUTION

[23.02]

2-13/16 [71.44]

R

1-1/16

41/64 [16.27]

29/32

[26.99]

BARBED FO

5-57/64
[149.68]

1/8 OR 3/16

ID TUBING

HOW TO ORDER

Use the bold characters from the chart below to construct a product code.

MANOMETER

SERIES

477AV: Handheld digital manometer

RANGE

-000: 1 in w.c. (0.25 kPa)

-00: 4 in w.c. (1 kPa)

-0: 10 in w.c. (2.5 kPa)

-1: 20 in w.c. (5 kPa)

-2: 40 in w.c. (10 kPa)

-3: 200 in w.c. (50 kPa)

477AV

-4: 10 psi (70 kPa)

-5: 20 psi (140 kPa)

-6: 30 psi (200 kPa)

-7: 100 psi (700 kPa)

-8: 150 psi (1000 kPa)

AIR VELOCITY KIT

477

-4

-0T

Pressure Range MaxPressure Resolution

0 to 1 in w.c.
0 to 4 in w.c.
0 to 10 in w.c.
0 to 20 in w.c.
0 to 40 in w.c.
0 to 200 in w.c.
0 to 10 psi
0 to 20 psi
0 to 30 psi
0 to 100 psi

0 to 150 psi

5 psig
5 psig
5 psig

10 psig
10 psig
30 psig
30 psig
60 psig
60 psig

150 psig

200 psig

0.001

0.001

0.01

0.01

0.01

0.1

0.01

0.01

0.01

0.1

0.1

-NIST

OPTIONS

-COC: Certicate of calibration

-FC: Factory calibration

-NIST: NIST traceable calibration certicate

-AV

SERIES

477: Handheld digital manometer

OPTIONS

-AV: Air velocity kit

RANGE

-000T: 1 in w.c. (0.25 kPa)

-00T: 4 in w.c. (1 kPa)

-0T: 10 in w.c. (2.5 kPa)

-1T: 20 in w.c. (5 kPa)

ACCESSORIES

Model Description
A-47X-BOOT
A-402A

Protective magnetic rubber boot

Carrying case; tough gray nylon pouch protects any Series 477AV Manometer;
double zippered for quick and easy access, with a belt loop that snaps closed;
7-1/2˝H x 3˝W x 2-1/4˝D (191 x 76 x 57 mm)

DWYER INSTRUMENTS, INC.

©Copyright 2021 Dwyer Instruments, Inc.
Printed in U.S.A. 6/21 DS-477AV Rev. 1

Important Notice: Dwyer Instruments, Inc. reserves the right to make changes to or discontinue any product or service identied in this publication without notice. Dwyer advises its customers to obtain the

latest version of the relevant information to verify, before placing any orders, that the information being relied upon is current.