INSTALLATION
1. Location:
Select a clean, dry, vibration-free location where
ambient temperatures will be between 20 and 120°F (-6.67 and
48.9°C). Tubing supplying pressure to the instrument can be
practically any length but long runs will increase response time
slightly.
2. Position:
The PHOTOHELIC
®
Switch/Gage is factory cali-
brated for use with scale in a vertical plane. Operation at other
angles may affect accuracy and/or require zero adjustment.
Most models can be specially calibrated at the factory for other
positions if specified at time of ordering. Ranges below 1
″
W.C.
must be used only with scale vertical.
3. Mounting:
The PHOTOHELIC
®
is normally mounted before
making electrical connections. The electrical enclosure is
removable at any time regardless of mounting method.
(A) Panel Mounting:
Normal mounting is flush or through panel
as shown in Fig. B. Allow 4-
3
/
8
″
(111.13 mm) clearance behind
the unit for removal of electrical enclosure. Make a 4-13/16
″
(122.24 mm) diameter hole in panel. Insert the PHOTOHELIC
®
unit from front of panel and slip mounting ring over case from
behind with stepped side facing rear. Fit the snap ring into nar-
row groove at back edge of the bezel. Thread four 6-32 x 1-1/4
″
mounting screws into tapped holes in mounting ring and seat it
against snap ring. Tighten screws against back of panel. See
Fig. B.
Series A3000 Photohelic
®
Differential Pressure Switch/Gage
Specifications - Installation and Operating Instructions
Bulletin B-33-A
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]
Lit-By Fax: 888/891-4963
The PHOTOHELIC
®
Series A3000
is a versatile 2-in-1 instru-
ment combining a time-proven Magnehelic
®
differential pres-
sure gage with low/high pressure switches. It is designed to
measure and control positive, negative or differential pressure
of air or other non-combustible, non-corrosive gases. Gage
reading is unaffected by switch operation. Switch set points are
easily adjusted with knobs located on gage face. Applied pres-
sure and switch set points are fully visible at all times.
Deadband is one pointer width, less than 1% of full scale. Each
set point controls a DPDT relay and both relays can be inter-
locked to provide variable deadband control.
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. Capsu-Photohelic
®
± 3% of full
scale at 70°F (21.1°C). ±2% on 43000S models; ±4% on 43215,
43220 and 43500.
Pressure Limits:
Photohelic
®
-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. Capsu-Photohelic
®
, -20Hg. 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:
Photohelic
®
, 1/8˝ female NPT. Capsu-
Photohelic
®
1/4˝ female NPT.
Size:
Photohelic
®
, 4˝ (101.6 mm) dial face, 5˝ (127 mm) O.D. x 8-
1/4˝ (209.55 mm). Capsu-Photohelic
®
, 4˝ (101.6 mm) dial face, 5˝
(127 mm) O.D. x 9-3/16” (233.36 mm).
Weight:
Photohelic
®
, 4 lbs. (1.81 kg). Capsu-Photohelic
®
5 lbs., 8
oz. (2.49kg). Capsu-Photohelic
®
Brass 11 lbs., 2 oz. (5.05 kg).
SWITCH SPECIFICATIONS
Switch Type:
Each setpoint has 2 Form C relays (DPDT).
Repeatability:
±1% of full scale.
Electrical Rating:
Photohelic
®
, 10A @ 28 VDC, 10A @ 120, 240
VAC; Capsu-Photohelic
®
10A @ 120 VAC, 6A @ 240 VAC, 60
Hz res. 10A @ 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.
Agency Approvals:
Photohelic
®
UL: File No. E38121, Vol. 1,
Sec. 4; CSA: File No. LR22541-34; CE: EN 61000-6-2: 1999, EN
6100-3-2: 2000, EN 61000-3-3: 2000.
Ø4-13/16 [122.24]
HOLE REQUIRED FOR
PANEL MOUNTING
1/2 MALE NPT PRESSURE CONNECTION.
SINGLE HIGH PRESSURE CONNECTION
FOR SERIES 36000S MODELS.
SNAP RING GROOVE
Fig. A
Fig. B
NOTE:
Detailed dimension drawings are available from our Customer Service
Dept. for PHOTOHELIC
®
switch/gages as installed in two optional enclosures.
For weatherproof housing, request no. 13-700132-00. /For explosion-proof
housing, request no. 13-700113-01.
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
B-33-A 11/12/02 4:36 PM Page 1