Dwyer 275 - Manual

SPECIFICATIONS
Input Signal: 4-20 mA DC.
Input Impedance: 460 Ohm max @ 20 mA DC.
Material: Aluminum diecasting.
Air Supply: 20 to 100 psi (1.4 to 6.9 bar).
Air Connection: 1/4˝ NPT.
Gage Connection: 1/8˝ NPT.
Conduit Connection: 1/2˝ NPT.
Linearity: ±0.5% of full scale.
Hysteresis: ±0.5% of full scale.
Sensitivity: ±0.2% of full scale.
Repeatability: ±0.3% of full scale.
Air Consumption: below 0.07 scfm (2 LPM) at 20 psig (1.4 bar)
supply.
Flow Capacity: 2.5 scfm (70 LPM) at 20 psig (1.4 bar) supply.
Stroke: 0 to 90°.
Enclosure Rating: NEMA 4X (IP66).
Ambient Temperature: Operating: -40 to 185°F (-40 to 85°C).
Weight: 3.3 lb (1.5 kg).
Lever: 175: 0.39 to 1.57˝ (10 to 40 mm); 275: NAMUR. Series 275 PRECISOR ® III Electro-Pneumatic Positioner controls
valve stroke 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 powerful functions such as Auto
calibration, PID control, Alarm and Hart
® protocol.
FEATURES
• LCD allows 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 (8.5V), 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 available for configurating parameters or
monitoring the valve position.
• Analog feedback signal (4 to 20 mA).
• The adjustment of valve characteristics available.
• Specific flow control is available with setting 16 points at users’
command.
• 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 4-12 mA, 12-20 mA are available.
• The positioner can manually actuate the valve or damper.
6-13/64
[157.56]
3-17/32
[89.69]
21/64
[8.33]
5-11/32
[135.73]
CONDUIT 1/2˝
NPT 1/4˝
SUPPLY
6-7/64
[155.18]
31/64
[12/30]
3/8
[9.53]
13/64
[5.16]
1-25/32
[45.24]
2-11/32
[59.53]
1-25/32
[45.24]
1-21/32
[42.07]
1-25/32
[45.24]
2-49/64
[70.25]
NPT 1/4˝
OUT 2
NPT 1/4˝
OUT 1
2-3/8
[60.33]
MOUNTING BRACKETS
6-31/64
[164.70]
3-35/64
[90.09]
6-17/32
[165.89]
3-35/64
[90.09]
4-5/64
[103.58]
4-5/8
[117.48]
Series 275 PRECISOR ® III Electro-Pneumatic Positioner
Specifications - Installation and Operating Instructions
Bulletin F-98
DWYER INSTRUMENTS, INC.
Phone: 219/879-8000 www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 e-mail: [email protected]
HART ® is a registered trademark of Hart Communication Foundation