Series 477A Digital Manometers
are ver-
satile, hand-held, battery operated manome-
ters available in several basic ranges from 0-
20 in. w.c. up to 100 psi. All models measure
either positive, negative or differential pres-
sures 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 are a
hold feature plus both visual and audible over-
pressure alarms.
477A-1
0-20.00 in. w.c. 0-4.982 kPa
477A-2
0-40.00 in. w.c. 0-9.96 kPa
477A-3
0-200.0 in. w.c. 0-49.82 kPa
477A-4
0-10.00 psi 0-68.95 kPa
477A-5
0-30.00 psi 0-206.9 kPa
477A-6
0-50.00 psi 0-344.8 kPa
477A-7
0-100.0 psi 0-689.5 kPa
Series 477A Handheld Digital Manometer
Specifications - Installation and Operation Instructions
Bulletin D-26
DWYER INSTRUMENTS, INC.
Phone: 219/879-8000 www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A.
Fax: 219/872-9057 e-mail: [email protected]
SPECIFICATIONS
Service:
Air and compatible gases.
Wetted Parts:
Consult factory.
Accuracy:
±0.10% of full scale from 60 to 78°F
(15.6 to 25.6°C); ±1% of full scale from 32 to 60
and 78 to 104°F (0 to 15 .6 and 25.6 to 40°C).
Pressure Hysteresis:
±0.1% of full scale.
Pressure Limits:
See chart.
Temperature Limits:
32 to 104°F (0 to 40°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 volt alkaline battery.
Battery included but not connected.
Weight:
10.2 oz. (289 g).
Connections:
Two barbed connections for use
with 1/8˝ (3.18 mm) or 3/16˝ (4.76 mm) I.D. tubing
for 477A-1, 477A-2, 477A-3, 477A-4 and 477A-5
only. Two compression fittings for use with 1/8˝
(3.18 mm) I.D. x 1/4˝ (6.35 mm) O.D. tubing for
477A-6 and 477A-7 only.
Available Pressure Units:
477A-1 & 477A-2: psi, in. w.c., mm w.c., in.
Hg, mm Hg, Pa, kPa, bar, mbar
477A-3 & 477A-4: psi, in. w.c., mm w.c., in.
Hg, mm Hg, kPa, bar, mbar
477A-5, 477A-6 & 477A-7: psi, in. w.c., in.
Hg, mm Hg, kPa, bar, mbar
Model
Number
English
Range
Metric
Range
Maximum Pressure
477A-1
3 psi (0.21 bar)
477A-2
3 psi (0.21 bar)
477A-3
15 psi (1.03 bar)
477A-4
30 psi (2.07 bar)
477A-5
60 psi (4.13 bar)
477A-6
100 psi (6.89 bar)
477A-7
200 psi (13.78 bar)
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