Dwyer 43000 User Manual

Bulletin B-34

(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

Series 43000 Capsu-Photohelic®Pressure Switch/Gage

Specifications - Installation and Operating Instructions

Figure 1

The Capsu-Photohelic®Switch/Gage is a most versatile, precise pressure switch

combined with the Capsuhelic
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
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.

®

pressure gage. Available with one or two

®

switch/gage controls

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.

Through Panel Mounting

Figure 2

*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.

DWYER INSTRUMENTS, INC.

P.O. BOX 373 • MICHIGAN CITY, IN 46361, U.S.A. Fax: [phone] e-mail: [e-mail]

Phone: [phone] www.dwyer-inst.com

INSTALLATION

1. Location: All parts of the Capsu-Photohelic

®

pressure switch/gage

are ruggedly constructed and will stand a moderate amount of vibration, physical
shock and handling. Normal care in handling and installation is all that is
required. In cases where instrument panel vibration is severe, the panel should
be mounted or the amplifier-relay unit mounted remotely on a more stable
surface.

Select a location where the ambient temperature will not exceed 120°F.
Pneumatic pressure sensing lines may be run any necessary distance. For
example, 250 foot sensing lines will not affect accuracy but will damp the reading
slightly. Do not restrict lines. If pulsating pressure or vibration causes excessive
pointer oscillation or relay chatter, consult factory for additional damping means.
See accessory Bulletin S-101 for fittings.

2. Position: The Capsu-Photohelic

®

may be mounted as an integral package

or the amplifier-load relay assembly and housing may be mounted remotely from

the indicating gage-phototransistor unit. Extension cords with 7 pin plugs and
receptacles are available from Dwyer for interconnection of the two units.

All standard units are calibrated for use with the diaphragm and scale in a

vertical position. Special factory calibration is available for applications requiring
inclined or horizontal positions. The exceptions are ranges under 5 in w.c. which
are only available for vertical installation.

3. Mounting: The Capsu-Photohelic

®

is normally mounted before making
electrical connections, as the electrical enclosure is independent of the mounting
means and may be removed at any time.

A. Panel Mounting: Normal mounting is flush or through panel as shown in

Figure 2. Be sure to allow 4-3/8˝ extra space behind the unit for electrical
enclosure removal. Make a single 4-13/16˝* diameter hole in the panel.
Insert the entire Capsu-Photohelic

®

unit from the front, then slip on
the mounting ring and snap ring from the rear. Seat the snap ring in its
groove, back up the mounting ring against snap ring and tighten the four
(4) 1-1/4˝ No. 6-32 clamp screws provided. If behind panel space is critical,
the amplifier-relay unit can be mounted remotely. See the Remote-Relay
Mounting Instructions for details.

(2) 1/4 DIA. HOLES FOR

BLOWOUT PASSAGE

7/8˝ DIA. HOLE

ø4-1/8

[103.58]

Ø4-3/8

[110.33]

42° TYP.

(2) HOLES

35° TYP.

(4) HOLES

(4) 3/16 DIA. HOLES

B: Hole Layout (Front)

Figure 3

C. Remote Relays Mounting: The amplifier – relay unit may be mounted remotely

as shown in Figure 4A. Use the hole layout as shown in Figure 4B for this option.
Additional mounting information for special requirements is available from the
factory.

B. Gage Mounting with Relay Package Remote: Where it is preferred to

install the amplifier-relay unit separate from the gage, (usually due to
space limitations) the gage may either be panel mounted as shown in
Figure 2 or surface mounted as in Figure 3A. For surface mounting, use
the hole layout in Figure 3B.

CAUTION

When the gage is surface mounted, two 1/4˝ diameter holes

must be located as shown for blow-out protection. This assures
that if the gage is overpressured, thus causing a failure, pressure will be safely
vented out the back. Failure to keep these holes clear could result in personal injury
and/or property damage since the excessive pressure could be forced into the front
cover which would then blow off.

A: Surface Mounting

A: Remote Amplifier-Relay Unit

[108.74]

4-9/32

[108.74]

5

[127.00] SQ

B: Hole Layout

Figure 4

ø3/16

TYP 4 PLACES

4-9/32