Omega 477B User guide

TUBING

2-13/16 [71.44]

29/32 [23.02]

SERIES 477B

HANDHELD DIGITAL MANOMETER

Precise Air Pressure Measurement, ±0.1% Accuracy

CALIBRATION SERVICES AVAILABLE

TEST, ADJUST, & BALANCE

41/64

[16.27]

1-1/16
[26.99]

5-57/64
[149.68]

BARBED FOR 1/8
OR 3/16 ID

The Series 477B Handheld Digital Manometer is a versatile, hand-held, battery
operated manometer available in several basic ranges from 0-20 in w.c. up to 100
psi. All models measure either positive, negative or differential pressures with ±0.10%
of full-scale accuracy. You can select from up to seven common English and metric
pressure units so conversions are not necessary. A memory function allows storage
of up to 40 readings for later recall and a backlight provides auxiliary lighting for
hard-to-see locations. Also standard is a hold feature; plus both visual and audible
overpressure alarms.

BENEFITS/FEATURES

• Precise 0.1% FS accuracy provides four times better accuracy than most standard
manometer/gages

• Aluminum housing protects instrument against damage

• 40 readings in internal memory reduces time to record data

Portable

APPLICATIONS

Manometers,

• Lab calibration of other pressure instruments

• Airvelocity/airowmeasurementsincommercialbuildings

MODEL CHART

Model Range
477B-1

0 to 20.00 in w.c.

477B-2

0 to 40.00 in w.c.

477B-3

0 to 200.0 in w.c.

477B-4

0 to 10.00 psi

477B-5

0 to 30.00 psi

477B-6

0 to 50.00 psi

477B-7

0 to 100.0 psi

Available Pressure Units

.0498

.7225

1.471
.0996
.4982
.6895

2.069

3.447

6.895

1.445

7.225

10.00

30.00

50.00

100.0

2.942

14.71

20.36

61.08

101.8

203.6

4.982

9.96

49.82

68.95

206.9

344.7

689.5

20.00

40.00

200.0

276.8

830.4
1384
2768

37.36

74.73

373.6

517.1
1551
2585
5171

49.82

99.6

498.2

689.5
2069
3447
6895

SPECIFICATIONS
Service: Air and compatible gases.
Wetted Parts: Consult factory.
Accuracy: ±0.10% FS from 60 to 78°F (15.6 to 25.6°C); ±1% FS from 32 to 60 and

78 to 104°F (0 to 15 .6 and 25.6 to 40°C).

Pressure Hysteresis: ±0.1% FS.
Pressure Limits: See chart.
Temperature Limits: 0 to 140°F (-17.8 to 60°C).
Storage Temperature Limits: -4 to 176°F (-20 to 80°C).
Display: 4-digitLCD(.425˝Hx.234˝Wdigits).
Resolution: See chart.
Power Requirements: 9 V alkaline battery. Battery included, but not connected.
Connections: Twobarbedconnectionsforusewith1/8˝(3.18mm)or3/16˝

(4.76 mm) I.D. tubing for 477B-1, 477B-2, 477B-3, 477B-4 and 477B-5 only. Two

compressionttingsforusewith1/8˝(3.18mm)I.D.x1/4˝(6.35mm)O.D.tubing

for 477B-6 and 477B-7 only.

Weight: 10.2 oz. (289 g).
Compliance: CE.

Maximum

1.667

3.333

16.67

23.07

69.20

115.3

230.7

508.0
1016
5080
7031

-

-

-

4982
9964

-

-

-

-

-

Pressurebar psi in Hg kPa in w.c. mm Hg mbar ft w.c. mm w.c. Pa

3 psig
3 psig
15 psig
30 psig
60 psig
100 psig
200 psig

OPTIONS

To order add sufx:

-NIST NISTtraceablecalibrationcerticate
Example: 477B-1-NIST

ACCESSORIES
Model Description
A-402A

A-47X-BOOT

Description

Carrying case; tough gray nylon pouch protects any Series 477B

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)

Protective magnetic rubber boot

DWYERINSTRUMENTS,LLC|dwyer-inst.com174

A-402A

A-47X-BOOT

(manometer not included)