Series 185/285 Smart Positioners
Specifications - Installation and Operating Instructions
Bulletin V-185/285
TM
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]
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 (3.5 to 9 bar).
Air Connection:
1/4˝ NPT.
Gage Connection:
1/8˝ NPT.
Conduit Connection:
1/2˝ NPT.
Linearity:
±0.5% FS.
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.
The Series 185 and 285 Smart Positioners
control valve movements accurately
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
®
protocol.
Features
• 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.
• Variable orifice is applied in case of a small actuator; the hunting is controlled
to the optimum condition during operation.
• HART
®
communication processes various information for the valve and
positioner.
• Valve system is stabilized by outputting analog feedback signal.
• The adjustment of valve characteristics (linear, quick open, equal percentage)
is available.
• Specific flow control is available with setting 16 points at users’ command.
• Tight shut-close and shut-open can be set voluntarily.
• PID parameters can easily be adjusted in the field without additional
communicator.
• The pressure of air filter regulator is sent directly to actuator using A/M
switch.
• Split ranges such as 4 to 20 mA, with 12 to 20 mA available.
• Setting zero and span as partial section is available by hand calibration
function.
• The valve defect is easily checked because the valve can be operated
voluntarily.
• Air filter regulator can be attached to the product with only one linear nipple
without extra piping.
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
ACTION
SINGLE
ACTION
3-47/64
[95.00]
Series 185
Series 285
HART
®
is a registered trademark of Hart Communication Foundation
