Dwyer 285 User Manual
Series 185/285 Smart Positioners
LCD SCREEN
SMART POSITIONER
3
-27/32
[97.50]
3-1/64
[76.50]
4-7/64
[104.20]
SUPPLY
1
/4 NPT
2
-33/64
[64.00]
2-11/32
[
59.60]
4-13/32
[
111.90]
STAINLESS STEEL
4
-31/64
[113.8]
STANDARD
CONDUIT ENTRY
1
/2 NPT
8
-31/64
[215.70]
DOUBLE
A
CTION
S
INGLE
A
CTION
3
-47/64
[95.00]
Specifications - Installation and Operating Instructions
eries 185
S
eries 285
S
he Series 185 and 285 Smart Positioners control valve movements accurately
T
using an input signal of 4 to 20 mA from the controller. In addition, a highly efficient
microprocessing operator built into the product performs various functions such as
auto calibration, PID control, alarm and Hart
eatures
F
LCD allows the user to directly check the positioner condition in the field.
•
Endures severe vibration.
•
• Operates normally regardless of changes in supply pressure during operation.
• Simple to use auto calibration.
• Easily equipped on small actuators because of its small size.
• Low air consumption reduces operating cost.
• Can be used in low voltage (8.5 V), leaving no limitation in controller.
®
• HART
communication available for configurating parameters or monitoring the
valve position.
• Analog feedback signal (4 to 20 mA).
• The adjustment of valve characteristics (linear, quick open, equal percentage)
available.
• Tight shut-close and shut-open can be set in the programming menu.
• PID parameters can easily be adjusted in the field without additional
communicator.
• Split ranges such as 4 to 12 mA, with 12 to 20 mA available.
• The positioner can manually actuate the valve or damper.
• An air filter regulator can be mounted directly to the positioner.
®
protocol.
Bulletin V-185/285
SPECIFICATIONS
Input Signal: 4 to 20 mA DC.
Input Impedance: 460 Ω max @ 20 mA DC.
Enclosure: Aluminum, SS.
Air Supply: 35 to 116 psi (2.4 to 9 bar).
Air Connection: 1/4˝ NPT.
age Connection: 1/8˝ NPT.
G
onduit Connection: 1/2˝ NPT.
C
inearity: ±0.5% FS.
L
Hysteresis: ±0.5% FS.
Sensitivity: ±0.2% FS.
Repeatability: ±0.3% FS.
Air Consumption: .0004 scfm (.01 LPM) at 20 psig (1.4 bar) supply.
Flow Capacity: 2.1 scfm (60 LPM) at 20 psig (1.4 bar) supply.
Stroke: 185: 0.5 to 6 in (10 to 150 mm); 285: 0 to 90°.
Enclosure Rating: NEMA 4X (IP66).
Temperature: Operating: -22 to 185°F (-30 to 85°C).
Weight: 185: 3.3 lb (1.5 kg); 285: 6.4lb (2.9 kg).
Lever: 185: .39 to 1.57 in (10 to 40 mm); 285: NAMUR.
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 e-mail: info@dwyer-inst.com
®
HART
is a registered trademark of Hart Communication Foundation
Phone: 219/879-8000 www.dwyer-inst.com
tructure
LCD SCREEN
SMART POSITIONER
0
100
50
L
CD SCREEN
SMART POSITIONER
S
he structure of the 185 is shown below. The Series 285 structure is the same as
T
he linear model without the feedback lever.
t
nstallation
I
ote: When the positioner is replaced or installed with the actuator, make sure of
N
the following:
-All inputs and supply pressure to the valve, actuator and other instruments must
be shut down.
-The control valve must be separated from the system with a bypass valve or other
equipment so that the entire system does not shut down.
-No pressure remains in the actuator.
nstalling Series 185 with Bracket
I
t is necessary to make a proper bracket to attach on the actuator yoke.
I
he most important considerations in the design of the bracket are as follows:
T
Series 185 feedback lever should be at 50% of valve stroke.
-
- Feedback level connection bar of actuator clamp should be connected in the
position so that the valve stroke and the numbers carved on feedback lever are
fitted. If the bracket meets the above conditions, Series 185 can be installed very
asily.
e
. Assemble Series 185 and bracket with bolts. Use standard bolts in bolt holes on
2
he backside of the unit.
t
nstalling Series 185 with Bracket
I
3. After assembling Series 185 and bracket with bolts, attach it using bolt holes of
actuator yoke. Do not tighten completely, there must be some space.
4. Install bar connected with Series 185’s feedback lever on the actuator clamp.
The slot length between Series 185’s feedback lever is .26˝ (6.5 mm), so the
diameter of the connection bar should be less than .25˝ (6.3 mm).
Tools For Installation
• Hexagonal wrenches
• (+) Screw driver
• (-) Screw driver
• Spanners for hexagon head bolts
Series 185 Installation
Series 185 is used for linear motion valves such as Dwyer Instruments’ globe
valves using a spring return type diaphragm actuator or piston actuator. The Series
185 consists of the following components. Be sure that all the components are
included.
1. Series 185 main body
2. Feedback lever and lever spring
3. Flange nut (attached on the bottom of main shaft of Series 185 body)
4. Four hexagon head bolts M8x1.25P
5. Four M8 plate washers
5. Connect the air filter regulator with the actuator temporarily. Set supply pressure
of air filter so that the actuator clamp is positioned at 50% of valve stroke.
. Insert the connection bar attached on the actuator clamp into the slot of Series
605040
9
0
°
50%
L
CD SCREEN
S
MART POSITIONER
3010 20 40 50 60 70 1501401301201101009080
402010 30 80 90 100 110 120 130 140 150706050
N
o
T
o
u
c
h
!
6
85’s feedback lever. In order to reduce hysteresis, it should appear as shown:
1
7. Check that the Series 185’s feedback lever is level at 50% of valve stroke. If not,
ove bracket or feedback link until it is level. Product linearity becomes work if
m
eries 185 is installed without being level at 50% of valve stroke.
S
9. Once the Series 185 is installed according to the above procedures, tighten the
bolts and nuts of the bracket and feedback lever connection bar completely.
eries 285 Installation
S
eries 285 is designed for rotary motion valves such as Dwyer Instruments’ ball
S
nd butterfly valves using rack and pinion, scotch yoke or complex type actuators
a
whose stem is rotated 90°. Series 285 positioners consist of the following
components:
Series 285 main body
Fork lever and lever spring to attach on actuator
bracket
1
our hex bolts M8x1.25P
F
our M8 plate washers
F
Series 285 Installation Example of Fork Lever
8. Check valve stroke. The numbers indicating stroke are carved in the Series 185’s
feedback lever. Set the connection bar attached on the actuator clamp to the
number on the feedback lever applicable to valve stroke as shown in the following
picture. To set the connection bar and the number, move the bracket attached on
Series 185 or connection bar from side to side.
Stroke 40 mm
Stroke 90 mm
NOTE: After installation, operate the valve from 0 to 100% stroke using an air filter
regulator on the actuator. When the stroke is both 0 and 100%, the feedback lever
should not reach to the lever stopper on the backside of the Series 185 unit. If the
feedback lever reaches the lever stopper, move attachment of Series 185 away
from the yoke center.
Loading...