Dwyer Instruments 475-III Data sheet

Series

1-1/16

[26.98]

BARBED FOR 1/8 OR 3/16

I.D. TUBING 475-7 & 475-8 ONLY;

1/8 I.D. X 3/16 O.D. TUBING

2-13/16

[71.44]

29/32

[23.02]

5/8 [15.88]

5-7/8

[149.23]

475

Mk III Handheld Digital Manometer

Ranges from 1 in. w.c. to 150 psid, ±0.5% Accuracy

TEST EQUIPMENT

Manometers,

Portable

The Dwyer®Series 475-FM Mark III Handheld Digital Manometer is ideal for field calibration, monitoring or trouble shooting HVAC systems, clean rooms, or a wide range of other low pressure pneumatic systems. This handy instrument measures positive, negative or differential pressures of air and natural gases in ranges from 1 in w.c. (0.249 kPa) to 150 psid (10.34 bar). The Series 475-FM is approved and is intrinsically safe for hazardous locations, Class 1, Div. 1, Group A, B, C, D, T4. Its simple operation and easy to read digital display make it an indispensable test instrument for the plant engineer, industrial hygienist and HVAC technician. When used with a Dwyer and Air Velocity), the Series 475-FM Mark III can also be used as an air velocity gage. See the complete 475-1-FM-AV kit described below. The Series 475-FM Mark III is housed in a durable extruded aluminum case with its solid state circuitry mounted on a tough fiberglass epoxy circuit board. To meet the most demanding applications and to provide stability of instrument reading, the 1 in w.c. range is compensated for position sensitivity through the use of a unique patented dual sensor system. A standard 9 V battery provides up to 100 hours of operation. Dual push pads on the front panel control on-off, auto zero, and pressure unit selection. No set-up or leveling. The large

0.42˝ LCD display is easy to read, minimizing data collection errors. Units include a “low battery” indicator. The pressure sensor used is a highly stable silicon piezoresistive device. Standard connections are dual sized for 1/8˝ or 3/16˝ ID vinyl or rubber tubing. Complete instructions are conveniently printed on rear of housing.

FEATURES

• New low range option 0-1.000 in w.c.

• Measures positive, negative and differential pressures

• Rugged, extruded aluminum case

• Lightweight, fast and easy to use

• Selectable english/metric units

• FM approved

Model 475-000-FM 475-00-FM 475-0-FM 475-1-FM 475-2-FM 475-3-FM 475-4-FM 475-5-FM 475-6-FM 475-7-FM 475-8-FM

OPTION

For NIST traceable calibration certificate, add suffix -NIST to model numbers. Example: 475-1-FM-NIST.

English 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

Metric Range

.2491 kPa

0.996 kPa

2.491 kPa

4.982 kPa

9.96 kPa

49.82 kPa .6895 bar

1.379 bar

2.069 bar

6.895 bar

10.34 bar

Maximum Pressure

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

Pitot tube (see Flow

SPECIFICATIONS Service: 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 full-scale. 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). Storage Temperature Limits: -4 to 176°F (-20 to 80°C). Display: 0.42˝ (10.6 mm) 4 digit LCD. Resolution: See chart. Power Requirements: 9 V alkaline battery, installed non-functional, user

replaceable.

Weight: 10.8 oz (306 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 475-7-FM & 475-8-FM only.

Agency Approvals: CE, FM.

475-AV AIR VELOCITY KIT — Includes the Series 475-FM

Manometer, two A-303 static pressure tips two 9´ lengths 3/16˝ ID rubber tubing, no. 166-6-CF Pitot tube, A-397 step drill, A-532 air velocity slide chart and instruction bulletin H11, all packed in a tough, molded plastic carrying case with die cut foam liner. To order, add AV suffix to any standard 475 model no.

Example: 475-1-FM-AV 475-000-FM-AV

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

Series 475 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

See page 567 for process tubing options.

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