Tempco Photohelic 3001 Installation And Operating Instructions Manual

Series 3000 Photohelic
Specifications - Installation and Operating Instructions
*Patent No. 3,862,416
The Photohelic ® Switch/Gage is a very versatile, precise
pressure switch combined
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 con-
trol. 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 ® SENSING - HOW IT WORKS
In a typical control application, the Photohelic
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 pos-
itive, chatter-free operation.
TEMPCO s.a. 4e ave. N°114, Z.I. des Hauts Sarts, B-4040 Herstal, Belgique. T:(32)04-2649458, F:(32)04-2649476, www.tempco.be, tempco@tempco.be
Les photos et caractéristiques présentés dans ce catalogue sont données à titre indicatif et ne sont pas contractuelles.
® Pressure Switch/Gage
with the time-proven
® switch/gage
2-1/2 [63.50]
1/8 FEMALE NPT HIGH
2-1/16 [52.39]
PRESSURE CONNECTION
2 [50.80]
1/8 FEMALE NPT LOW
PRESSURE CONNECTION
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
SPECIFICATIONS
GAGE SPECIFICATIONS
Service: Air and non-combustible, compatible gases.
Wetted Materials: Consult Factory.
Accuracy: Photohelic ® , ±2% of full scale at 70°F (21.1°C). ±3%
on -0 and ±4% on -00 models.
Pressure Limits: Photohelic
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: Photohelic
Size: Photohelic ® , 4˝ (101.6 mm) dial face, 5˝ (127 mm) O.D. x 8-
1/4˝ (209.55 mm).
Weight: Photohelic ® , 4 lbs. (1.81 kg).
SWITCH SPECIFICATIONS
Switch Type: Each setpoint has 2 Form C relays (DPDT).
Repeatability: ±1% of full scale.
Electrical Rating: Photohelic
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.
Agency Approvals: Photohelic
3.A.01.450-E-100910 page 1/7
(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
® -20" Hg. to 25 psig (-0.677 to
, 1/8˝ female NPT.
®
® , 10A @ 28 VDC, 10A @ 120,
® UL, CSA, CE.