Series 477A Handheld Digital
Manometer
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| Air Pressure Measurement, ±0.1%
Accuracy |
- Measure Positive, Negative, or Differential Pressures.
- Instant Selection from up to Seven English/Metric Units.
- Stores 20 Readings in Memory for Later Reference.
- Both Audible and Visual Overpressure Alarms.
- Operates up to 100 Hours on a Single 9 Volt Battery.
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 The Popular Dwyer Series 477 is
now available with 0.1% full scale accuracy in the new Series
477A. The 477A contains a highly accurate differential pressure
sensor that offers a 0.1% full scale accuracy on air ranges from
20" w.c. to 100 psid. Series 477A Handheld Digital Manometers
are packed with features needed to make pressure measurements
and recording faster, easier and more accurate than ever. Instantly
select from up to nine of the most widely used pressure units
without having to waste time and risk mistakes with tedious conversions.
A non-volatile memory function enables storage of up to 20 readings
- perfect for HVAC technicians making Pitot tube traverses of
air flow readings across a duct. The 477A is also ideal for maintenance
personnel or technicians that require a highly accurate standard
to check their instrumentation or equipment to ensure proper
performance.
When working in poorly lighted areas, just switch
on the handy backlight feature. The manometer automatically shuts
itself off after 2 minutes to minimize battery drain. Electronic
zeroing means you simply touch a single key to perfectly null
out any minor pressure differences. A display HOLD key freezes
the current pressure for those all-too-common situations where
readings fluctuate. Included is an audible alarm to warn of overpressure
plus a visual alarm warning in case ambient noise levels are
too high to hear the alarm. Audible alarm also confirms a value
has been stored, eliminating the need to observe display during
a duct traverse.
Clear, concise operating instructions for all
functions are printed on the rear of the rugged extruded aluminum
case for quick reference. One-piece front membrane fully protects
all keys from dust and moisture; wipes clean in seconds. Detailed
written instructions, a wrist strap and 9 volt alkaline battery
are included.
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| Specifications: |
| Service: Air and non-combustible compatible gases. |
| Wetted Parts: Consult with us |
| Accuracy: ±0.10% of full scale from 60 to
78°F (15.6 to 25.6°C); ±1% of full scale from 32-60
and 78-104°F (0-15.6 and 25.6-40°C). |
| Pressure Hysteresis: ±0.1% of full scale |
| Pressure Limits: See chart (below) |
| 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) 4-1/2 digit liquid crystal |
| Resolution: See chart (below) |
| 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. |
| Stocked Models: |
| Model Number |
English Range |
Metric Range |
Maximum Pressure |
| 477A-1 |
0-20.00 in w.c. |
0-5 kPa |
3 psi (0.21 bar) |
| 477A-2 |
0-40.00 in w.c. |
0-10 kPa |
3 psi (0.21 bar) |
| 477A-3 |
0-200.00 in w.c. |
0-50 kPa |
15 psi (1.03 bar) |
| 477A-4 |
0-10.00 psi |
0-70 kPa |
30 psi (2.07 bar) |
| 477A-5 |
0-30.00 psi |
0-200 kPa |
60 psi (4.13 bar) |
| 477A-6 |
0-50.0 psi |
0-350 kPa |
100 psi (6.89 bar) |
| 477A-7 |
0-100.0 psi |
0-700 kPa |
200 psi (13.78 bar) |
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