Dwyer 285 User Manual

Series 185/285 Smart Positioners

LCD SCREEN

SMART POSITIONER

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[76.50]

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SUPPLY 1

/4 NPT

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59.60]

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111.90]

STAINLESS STEEL

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STANDARD

CONDUIT ENTRY

/2 NPT

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DOUBLE

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INGLE

CTION

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[95.00]

Specifications - Installation and Operating Instructions

eries 185

eries 285

he 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

eatures

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.

onduit Connection: 1/2˝ NPT.

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

100

CD SCREEN

SMART POSITIONER

he structure of the 185 is shown below. The Series 285 structure is the same as

he linear model without the feedback lever.

nstallation

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

t is necessary to make a proper bracket to attach on the actuator yoke.

he most important considerations in the design of the bracket are as follows:

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.

. Assemble Series 185 and bracket with bolts. Use standard bolts in bolt holes on

he backside of the unit.

nstalling Series 185 with Bracket

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

50%

CD SCREEN

MART POSITIONER

3010 20 40 50 60 70 1501401301201101009080

402010 30 80 90 100 110 120 130 140 150706050

85’s feedback lever. In order to reduce hysteresis, it should appear as shown:

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

eries 185 is installed without being level at 50% of valve stroke.

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

eries 285 is designed for rotary motion valves such as Dwyer Instruments’ ball

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

our hex bolts M8x1.25P

our M8 plate washers

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.

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