Instruction Manual

The Capsu-Photohelic
®
Switch/Gage is a most versatile, precise pressure switch
combined with the Capsuhelic
®
pressure gage. Available with one or two
phototransistor actuated relays. Gage reading is unaffected by switch operation.
Easy to adjust set points with 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 pressures as low as
0 to .5 in w.c. and as high as 0 to 6000 psig full scale; set points as low as .01 in
w.c. on a 5˝ scale unit.
PHOTOHELIC SENSING – HOW IT WORKS
In a typical control application, the Capsu-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.
Deadband between make and break is 1% of full scale or less – just enough to
assure positive, chatter-free operation.
*For convenience, this hole can be made with Model 730E, 120 MM chassis punch
manufactured by Greenlee Tool Co. Contact your machine tool distributor. Not
available from Dwyer Instruments.
Series 43000 Capsu-Photohelic
®
Pressure Switch/Gage
Specifications - Installation and Operating Instructions
Bulletin B-34
SPECIFICATIONS
GAGE SPECIFICATIONS
Service: Compatible gases and liquids. Brass case option required for water
based liquids.
Wetted Materials: Consult factory.
Accuracy: ±3% of FS at 70°F (21.1°C). ±2% on 43000S models; ±4% on 43215,
43220 and 43500.
Pressure Limits: -20 Hg to 500 psig (-0.677 to 34.5 bar).
Temperature Limits: 20 to 120°F (-6.67 to 48.9°C). Low temperature option
available.
Process Connections: 1/4˝ female NPT.
Size: 4˝ (101.6 mm) dial face, 5˝ (127 mm) OD x 9-3/16˝ (233.36 mm).
Weight: 5 lb, 8 oz (2.49 kg).
SWITCH SPECIFICATIONS
Switch Type: Each setpoint has 2 form C relays (DPDT).
Repeatability: ±1% of FS.
Electrical Rating: 10 A @ 120 VAC, 6 A @ 240 VAC, 60 Hz res. 10 A @ 28
VDC.
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.
(4) 6-32 HOLES
EQUALLY SPACED ON A
5-1/8 [130.18] B.C.
1/4 FEMALE NPT
LOW PRESSURE
CONNECTION
(AIR OR GAS)
1/4 FEMALE NPT
HIGH PRESSURE
CONNECTION (AIR OR GAS)
1/4 FEMALE NPT
HIGH PRESSURE
CONNECTION
(LIQUID)
3/4 [19.05] TYP
Ø [101.60]
FACE
5-1/2 [139.70] OD
MOUNTING RING
1/4 FEMALE
NPT LOW
PRESSURE
CONNECTION
(LIQUID)
Ø5
[127.00]
Ø4-47/64
[120.25]
5/8 [15.88]
5/8 [15.88]
PANEL MAX
3/16 [4.76]
3-7/8 [98.43]
5-1/8 [130.18]
7-5/16 [185.74]
8-9/16 [217.49]
4-3/8 [111.13]
HOUSING REMOVAL
3/4 CONDUIT
CONNECTION
Ø4-3/4
[120.65]
3-7/8 SQ
[98.43]
3-1/16 [77.79] TYP
DWYER INSTRUMENTS, INC. Phone: [phone] www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, IN 46361, U.S.A. Fax: [phone] e-mail: [e-mail]
Through Panel Mounting
Figure 1
Figure 2
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