Dwyer 3000 User Manual download pdf

The Photohelic

Switch/Gage is a very versatile, precise pressure

switch combined with the time-proven Magnehelic

pressure gage.

Models are available with one or two phototransistor actuated relays.

Gage reading is unaffected by switch operation. Easy to adjust set points

have knob controls. Applied pressure and switch set points are fully

visible at all times. Deadband is one pointer width - less than 1% of full

scale. Double-pole double-throw relays can be easily interlocked to

provide variable deadband control. For positive, negative or differential

pressure only on 3600S models. Full scale ranges available from 0-.25

in w.c. to 0-6000 psig.

PHOTOHELIC

GAGE SENSING - HOW IT WORKS

In a typical control application, the Photohelic

switch/gage controls

between high and low pressure set points. When pressure changes,

reaching either set point pressure, the beam from an LED to the limiting

phototransistor will be cut off by the helix-driven light shield. The

resulting signal change is electronically amplified to actuate its DPDT

slave relay and switching occurs. Dead band between make and break

is 1% of full scale or less - just enough to assure positive, chatter-free

operation.

Series 3000 Photohelic

Pressure Switch/Gage

Specifications - Installation and Operating Instructions

Bulletin B-33

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

GAGE SPECIFICATIONS

Service: Air and non-combustible, compatible gases.

Wetted Materials: Consult factory.

Accuracy: ±2% of full scale at 70°F (21.1°C). ±3% on -0 and ±4% on

-00 models.

Pressure Limits: -20˝ Hg. to 25 psig (-0.677 to 1.72 bar). MP option;

35 psig (2.41 bar), HP option; 80 psig (5.52 bar). 36003S – 36010S;

150 psig (10.34 bar). 36020S and higher; 1.2 x full scale pressure.

Temperature Limits: 20 to 120°F (-6.67 to 48.9°C); Low temperature

option available.

Process Connections: 1/8˝ female NPT.

Size: 4˝ (101.6 mm) dial face, 5˝ (127 mm) O.D. x 8-1/4˝ (209.55 mm).

Weight: 4 lb (1.81 kg).

SWITCH SPECIFICATIONS

Switch Type: Each setpoint has 2 Form C relays (DPDT).

Repeatability: ±1% of full scale.

Electrical Rating: 10A @ 28 VDC, 10A @ 120, 240 VAC.

Electrical Connections: Screw terminals.

Power Requirements: 120 VAC, 50/60 Hz; 240 VAC & 24 VAC;

Power optional.

Mounting Orientation: Diaphragm in vertical position. Consult factory

for other position orientations.

Set Point Adjustment: Adjustable knobs on face.

2-1/2 [63.50]

2-1/16 [52.39]

2 [50.80]

1-1/4

[31.75]

(4) 6-32 HOLES

EQUALLY SPACED ON

A 5-1/8 [130.18] B.C.

Ø4-47/64

[120.25]

Ø5

[127.00]

Ø4 [101.60]

FACE

5-1/2 [139.70]

O.D.

MOUNTING

RING

5/8 [15.88]

5/8 [15.88] PANEL

MAX

3/16 [4.76]

3-7/8 [98.43]

5-1/8 [130.18]

6-3/8 [161.93]

(7-5/8 [193.68])

4-3/8 [111.13]

HOUSING REMOVAL

3/4 CONDUIT

CONNECTION

Ø4-3/4

[120.65]

3-7/8 SQ

[98.43]

1/8 FEMALE NPT HIGH

PRESSURE CONNECTION

1/8 FEMALE NPT LOW

PRESSURE CONNECTION

Fig. 1

B-33:B-33 7/30/10 9:36 AM Page 1

1 2 3 4 5 6 ... 11 12

Summary of Contents

Page 1 - DWYER INSTRUMENTS, INC

The Photohelic®Switch/Gage is a very versatile, precise pressureswitch combined with the time-proven Magnehelic®pressure gage.Models are available wit

Page 2

CONEXIONES ELECTRICAS1. Cubierta: La unidad relé-amplificador tiene una carcasa fácil dequitar. Quite los tres (3) tornillos como se muestra en la

Page 3

6. Reset Manual de Doble Punto de Trabajo: El circuito tipo HHtambién se puede utilizar para aplicaciones con reset manual donda sedesee hacer un co

Page 4 - SECTION E

MANTENIMIENTO Y SERVICIOLos Interruptores/Indicadores Photohelic®de Dwyer®son instrumentos de precisión, expertamente ensamblados y calibrados en la f

Page 5

INSTALLATION1. LocationAll parts of the Dwyer®Photohelic®pressure switch/gage are ruggedlyconstructed and will stand a moderate amount of vibration, p

Page 6

Gage Mounting with Relays RemoteWhere it is desirable to mount the amplifier-relay unit separate from thegage-phototransistor unit, the gage may be mo

Page 7 - Serie 3000

ELECTRICAL CONNECTIONS1. CoverThe amplifier-relay unit has an easy to remove housing. Remove thethree (3) screws as shown in Fig. 5 and slide the hous

Page 8 - Ø4-13/16 [122.24]

5. Dual Set Point Automatic ResetCircuit Style HH is used for simple on-off switching applications. To placein service, connect load circuits to the a

Page 9

Bulletin B-33 page 6PHOTOHELIC®PRESSURE SWITCH/GAGEMODEL AND RANGESDWYER INSTRUMENTS, INC. Phone: 219/879-8000 www.dwyer-inst.comP.O. BOX 373 • MICHIG

Page 10

El Interruptor/Indicador de Presión Photohelic®es un an interruptorde presión muy versátile y preciso, combinado con el indicador depresión de respues

Page 11

INSTALACIONLocalización: Todas las partes del interruptor/indicador Photohelic®deDwyer®están robustamente construidas para soportar una moderadacantid

Page 12

Montaje del Indicador con los Relés Remotos: Donde se deseemontar la unidad relé-amplificador separada de la unidadindicador/fototransistor, el indica

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Dwyer 3000 User Manual

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