Dwyer Instruments 3000 Serie Manual De Instrucciones Y Operación

The Photohelic ® Switch/Gage is a very versatile, precise pressure
switch combined with the time-proven Magnehelic
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
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.
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A.
Series 3000 Photohelic
Specifications - Installation and Operating Instructions
1/8 FEMALE NPT HIGH
PRESSURE CONNECTION
1/8 FEMALE NPT LOW
PRESSURE CONNECTION
® pressure gage.
® switch/gage controls
Phone: 219/879-8000
Fax: 219/872-9057
® Pressure Switch/Gage
2-1/2 [63.50]
2-1/16 [52.39]
2 [50.80]
Ø4-3/4
[120.65]
3-7/8 SQ
[98.43]
3/4 CONDUIT
CONNECTION
3-7/8 [98.43]
5-1/8 [130.18]
6-3/8 [161.93]
4-3/8 [111.13] (7-5/8 [193.68])
HOUSING REMOVAL
Fig. 1
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.
www.dwyer-inst.com
e-mail: info@dwyer-inst.com
Bulletin B-33
(4) 6-32 HOLES
EQUALLY SPACED ON
A 5-1/8 [130.18] B.C.
1-1/4
[31.75]
Ø4-47/64
[120.25] Ø5
[127.00]
Ø4 [101.60]
FACE
5/8 [15.88]
5-1/2 [139.70]
5/8 [15.88] PANEL
O.D.
MAX
MOUNTING
3/16 [4.76]
RING