Dwyer Instruments 477 Data sheet

TEST EQUIPMENT

BARBED FOR 1/8 OR 3/16 I.D. TUBING

1-1/16

[26.98]

5/8 [15.88]

5-7/8

[149.23]

2-13/16

[71.44]

29/32

[23.02]

Series

477

Handheld Digital Manometer

Selectable Pressure Units, ±0.5% Accuracy, FM Approved Intrinsically Safe for Hazardous Locations, Class 1, Div. 1, Group A, B, C, D, T4

Portable

Manometers,

Series 477 Handheld Digital Manometers are packed

pressure measurement and recording faster, easier and more accurate than ever. First, you can instantly select from up to nine of the most widely used pressure units without having to waste time and risk mistakes with tedious conversions. Next, a non-volatile memory function enables storage of up to 40 readings — perfect for HVAC technicians making Pitot tube traverses of airflow readings across a duct. safe for hazardous locations, Class 1, Div. 1, Group A, B, C, D, T4. When working in poorly lighted areas, just switch on the handy backlight feature . It automatically shuts itself off after 20 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-comm on situations where readings fluctuate. We even included an audible alarm to warn you of overpressure plus a visual alarm warning in case ambient noise levels are too high to hear the alarm. Audible alarm also conf irms a value has been stored, eliminating the need to observe display during a duct traverse.

FEATURES

• New low pressure ranges

• USB option comes with cable and software for easy data downloading

• Instant selection from up to nine english/metric units

• Stores 40 readings in memory for later reference

• Measure positive, negative or differential pressures

• Large easy-to-read 0.4˝ LCD display includes switchable backlight for great visibility — anywhere

• Both audible and visual overpressure alarms

• Includes + and - indicators plus low battery warning

• Operates up to 100 Hours on a single 9 V battery

See page 567 for process tubing options.

with features you need to make

The FM approved models are intrinsically

SPECIFICATIONS Service: Air and compatible gases. FM

models air and compatible combustible 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°C). Pressure Hysteresis: ±0.1% of fullscale.

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).

ACCESSORIES A-402A CARRYING CASE — Tough gray nylon pouch protects any

Series 477 Manometer. Double zippered for quick and easy access. With belt loop that snaps closed.

7-1/2˝H x 3˝W x 2-1/4˝D (191 x 76 x 57 mm)

UHH-C1, Soft carrying case

OPTION

For NIST traceable calibration certificate, add suffix -NIST to model numbers. Example: 477-1-FM-NIST.

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

Display: 0.42˝ (10.6 mm) 4 digit LCD. Response Time: 1 s. Resolution: See chart. Power Requirements: 9 V alkaline

battery, installed non-functional, user replaceable.

Weight: 10.2 oz (289 g). 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 477-7-FM & 477-8-FM only.

Agency Approvals: CE, FM.

Model* 477-000-FM 477-00-FM 477-0-FM 477-1-FM 477-2-FM 477-3-FM 477-4-FM 477-5-FM 477-6-FM 477-7-FM 477-8-FM

422

Range

0-1.000 in w.c. 0-4.000 in w.c. 0-10.00 in w.c. 0-20.00 in w.c. 0-40.00 in w.c. 0-200.0 in w.c. 0-10.00 psi 0-20.00 psi 0-30.00 psi 0-100.0 psi 0-150.0 psi

bar

.0498 .0996 .4982 .6895

1.379

2.069

6.895

10.34

psi

.1445 .3613 .7225

1.445

7.225

10.00

20.00

30.00

100.0

150.0

in Hg

.0736 .2942 .7355

1.471

2.942

14.71

20.36

40.72

61.08

203.6

305.4

Available Pressure Units

kPa

in w.c.

.2491

1.000

0.996

4.000

2.491

10.00

4.982

20.00

9.96

40.00

49.82

200.0

68.95

276.8

137.9

553.6

206.9

830.4

689.5

2768

1034

4152

DWYER INSTRUMENTS, INC. | www.dwyer-inst.com

mm Hg

1.868

7.473

18.68

37.36

74.73

373.6

517.1 1034 1551 5171 7757

mbar

2.491

9.96

24.91

49.82

99.6

498.2

689.5 1379 2069 6895

mm w.c.

25.40

101.6

254.0

508.0 1016 5080 7031

249.1 996 2491 4982 9964

Maximum Pressure

5 psig 5 psig 5 psig 10 psig 10 psig 30 psig 30 psig 60 psig 60 psig 150 psig 200 psig