Dwyer 165EL User Manual

Bulletin F-90

SPAN UNIT

TORQUE MORTOR

ZERO UNIT

BASE BODY

PILOT VALVE

FEEDBACK SHAFT

FEEDBACK LEVER

VENT UNIT

BASE COVER

JUNCTION BOX

S
P
A

R
E

3

0

2

0

4

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

INPUT SIGNAL

4 ~ 20 mA

E

OUT1

OUT2

SUPPLY

6

-9/16

[

166.69]

6

-43/64

[

169.47]
2

X M8X1.25

1-25/32

[45.24]

4

-41/64

[

117.87]

2-49/64

[70.25]

1

-31/32

[

50.01]

4

X M8X1.25

STAINLESS STEEL VERSION

STANDARD VERSION

8-3/4

[225.30]

6-9/16

[166.69]

2X M8X1.25

4-9/16

[115.89]

1-25/32
[45.24]

1

-31/32

[

50.01]

4

X M8X1.25

2-3/4

[69.85]

3-19/32

[91.29]

3

-5/8

[

92.08]

Electro-Pneumatic

POSITIONER

Electro-Pneumatic

POSITIONER

Series 165EL PRECISOR®II Electro-Pneumatic Linear Positioner

Specifications - Installation and Operating Instructions

The Series 165EL PRECISOR®II Electro-Pneumatic Positioner is used for lin-

ar operation of pneumatic linear valve actuators by means of electrical controller

e

r control systems with an analog output signal of 4 to 20 mA or split ranges.

o

FEATURES

• There is no resonance in the range of 5 to 200 Hz.

• Perform 1/2 split control without any other substitutes.

• Easy to adjust zero and span.

• Easy to convert from reverse action to direct action or vice versa.

• Easy feedback connection.

• Fast and accurate response.

• Low air consumption.

• Designed as multi-port type for air tubing.

• Easy to install air tubing connection in any direction.

• Designed as block build structure for maintenance and repair.

STRUCTURE

PROXIMITY DIV., DWYER INSTRUMENTS, INC.

P.O. BOX 358 • MICHIGAN CITY, INDIANA 46360 U.S. A.

low Capacity: 28 scfm (80 LPM) at

PECIFICATIONS

S

nput Signal: 4 to 20 mA DC.

I
Input Impedance: 250 ±15 Ω.
Material: Aluminum diecasting.
Air Supply: 20 to 101 psig (1.4 to 7.0

bar).

Air Supply Connection: 1/4˝ NPT.
Gage Connection: 1/8˝ NPT.
Electrical Connection: Screw

Terminal.

Conduit Connection: 1/2˝ NPT.
Linearity: ±0.2% of FS.
Hysteresis: 1% of FS.
Sensitivity: ±0.2% of FS.

F

0 psig (1.4 bar) supply.

2

Stroke: 0.5 to 6˝ (10 to 150 mm).
Enclosure Rating: IP66.
Operating Temperature:

165EL: -4 to 158°F (-20 to 70°C);
165EL-SS: -40 to 158°F (-40 to
70°C);
165EL-FM: -4 to 140°F (-20 to
60°C).

Weight: 165EL: 6.1 lb (2.7 kg);
165EL-SS: 12.6 lb (5.7 kg).
Agency Approvals: CE (165EL
only), FM (165EL only).

Repeatability: ±0.5% of FS.
Air Consumption: 0.10 scfm (3 LPM)

at 20 psig (1.4 bar) supply.

PRINCIPLE OF OPERATION

Increase the input current signal to change lift position of valve. Force exerted by
(1) Torque Motor reduces Nozzle Back Pressure with increase in gap between (2)
Flapper and (3) Nozzle. Then (5) Spool moves upward and the (7) Seat opens
simultaneously. Air pressure of OUT1 pipe is discharged to (10) Actuator. As pres­sure in the actuator chamber goes up, (12) Actuator Stem starts to move. The
movement of (12) Actuator Stem exerts force to the (a) Feedback Spring through
Feedback Shaft connections. Then (10) Actuator will stop at the point of force bal­ance exerted by the input current signal and the feedback spring.

Phone: [phone] www.dwyer-inst.com
Fax: [phone] e-mail: [e-mail]

BLOCK DIAGRAM OF 165EL

NSTALLATION

I

xample of attaching to actuator

E

INSTALLATION cont.
Direct Action & Reverse Action

Attach the cam in the procedure of loosening the hexagonal nut with flange first,

etting the actuator to the starting position and then setting the cam reference line

s

nd the bearing contact point of span adjusting arm unit to the same position. Do

a

ot apply the supply pressure when attaching the cam as otherwise it is very dan-

n

erous. When the positioner is shipped out, the cam is tentatively tightened to the

g
shaft. Be sure to firmly lock the cam to the lock nut [tightening torque 17.7 to 22.1
in-lbs (2.0 to 2.5 NM)].

ase of directly attaching to diaphragm valve.

C

Connection with Feedback Lever

Attach in the position that the valve stem and lever form a right angle when the
input signal is 50%. Attach to the position that the runout angle is within the range
of 10 to 30°.

Example 1.

Example 2.

Case of using a bracket.

AIR PIPING CONNECTION

Fully purge the pipe to remove foreign matter. Use a clean supply air fully
removed of humidity and dust. Use a Series AFR filter regulator to keep supply
air pressure constant.

ELECTRICAL WIRING

SPARE

G

rounding

External Grounding Terminal

M

4*0.7P Round Head Screw

I

nternal Grounding Terminal

M

4*0.7P Round Head Screw

Ps=Supply Pressure

Low Pressure Balance
(0.4~0.5 Ps)

Med. Pressure Balance
(0.5 Ps)

H

igh Pressure Balance

(0.9~1.0 Ps) - Normal

B

alanced Point

B

alanced Point

Balanced Point

Input

Pressure

Output

P

ressure

Output

Pressure

O

utput

Pressure

Lock Screw

Connect the (+) and (-) output terminals from the regulator with the (+) and (-)
input terminals, respectively, of the positioner.

Use Cable Gland in pressure tight packing type.

­Cable O.D.= 0.375˝ ).

(

Use 1/2˝ NPT standard for conduit thread connection type. There is a

-

pare Bolt in the terminal board.

S

DJUSTMENT

A

heck the following prior to starting the adjustment:

C

The pipeline is correctly connected with the pressure supply

•

port and OUT1 and OUT2 port.

• The wires are correctly connected with the (+), (-) and

grounding terminals.

• The actuator and positioner are sturdily connected.

For locking of the auto/manual changeover screw of pilot valve

•
fully tightened in the clockwise direction).

(

The span adjusting lever of internal feedback lever is attached to the

•

correct (Direct or Reverse) position. Flange nut is firmly locked.

Zero Adjustment

Set input signal to the Stroke starting sig­nal (4 mA) then turn the Zero Adjuster
clockwise or counterclockwise. In case of
Spring Actuator, check if it is set to stan­dard pressure in Zero Point. If not, repeat
Zero adjustment.

Seat Adjuster

No need to adjust in the field because Seat
Adjuster is to be adjusted before shipment for

alanced pressure point of output pressure. If

b

he sensitivity is poor because of the actuator

t

ype of load condition, turn the seat adjuster

t

crew clockwise. If hunting occurs, turn the

s
seat adjuster screw counterclockwise. (The
amount of turning varies by actuators. Do not
loosen the stopper screw at this time since it

s set to avoid the screw coming off.)

i

High Pressure Balance
(13.1 - 14.5 psi Ps)

Med. Pressure Balance
(7.3 psi Ps)

Low Pressure Balance
(5.8 - 7.3 psi Ps)

s = Sup. Pressure

P

AINTENANCE

M

If the supply air is fouled, the positioner may not operate normally. Periodically

heck the compressed air cleaning system and make sure that clean air is always

c

upplied. When disassembling the pilot valve, coat grease to the O-ring of the

s

liding section. When the fixed orifice is clogged with carbon particles or others,

s
remove the pilot valve Auto/Manual changeover screw (built-in fixed aperture)
and clean it by inserting a 32 AWG wire into the aperture. If it must be replaced
with new one, stop the supply pressure and remove the stopper screw of the pilot
valve. Check the positioner once a year. Treatment at an early stage is especial­ly important if the positioner is used in severe environments, like coastal area.
In the unlikely event the 165EL Series Positioner should fail, the unit can be
returned to the factory for warranty repair if the warranty period has not expired.
Contact our customer service department for a RGA number and to setup the
return.

WARNING

Do not apply large vibration or impact to the positioner. The positioner must be
handled very carefully during transportation and operation. If the positioner is
used at temperatures outside of the specification, the sealing materials deterio­rate quickly and also the positioner may not operate normally. Use clean supply
air fully removed of humidity and dust. Do not remove the terminal cover at a dan­gerous position during power conduction. Be sure that the terminal cover and
body cover are installed during the operation. If you leave the positioner at the
operation site for a long time without using it, put the cover on it so that rain water
does not enter the positioner. If the atmosphere is of high temperature or high
humidity, take measures to avoid condensation inside. The condensation control
measures must be taken thoroughly for export shipment.

Span Adjustment

Adjust Range Adjustment so that an
Actuator stops at 0% position of the
Stroke by the 0% applied input signal and
100% position for 100% input signal
respectively. Check Zero Point and repeat
Zero Span Adjustment. 1/2 Split Range
can be used by Zero and Span
Adjustment. After Setting, tighten up Lock
Screw of Span
adjustment.

Auto/Manual Switch

This is a Switch for changing Auto and Manual. Shipped products are set for Auto.
To use Manual operation, turn A/M Switch counterclockwise. In manual operation,
the pressure of AFR regulator connects to Actuator. After using, return switch to
"A". Not available for OUT2.

TROUBLESHOOTING

ondition

C

ot operating with Input

N

ignal applied

S

OUT1 pressure raised,
does not come down

utput pressure is oper-

O

ted by A/M switch only

a

unting occurs

H

Actuator is operated by
On/Off only
Linearity is not good

Hysteresis is not good

ause

C

oo low or no supply air

T

oose connection

L
Wrong wiring for (+) and (-)
Short or open circuit of terminal
motor

logged nozzle

C

oose or wrong setting of

L

eedback lever

f

eakage of A/M switch

L
Wrong contact or search of
Flapper
Clogged fixed orifice

logged nozzle

C

ff-positioned stabilizer spring

O
Too low of actuator volume
Clogged fixed orifice
Wrong connection of
OUT1 and OUT2 tube
Wrong setting of feed­back lever

rong Zero, Span Adjustment

W

upply pressure is unstable

S
Wrong setting of Seat
Adjuster
Loose connection of actuator
and positioner

am Shaft is worn out

C

hat To Do

W

nput or increase supply air

I

ighten set screw of terminal

T
Connect wiring (+) and (-)
Replace Motor Unit

eplace Motor Unit

R

orrect setting and tighten

C

ighten or replace A/M switch

T
Replace Motor Unit

Clean or replace fixed orifice

lean nozzle or

C

eplace Motor Unit

r

nsert stabilizer spring

I
Insert orifice
Clean or replace fixed orifice
Correct position of tube

Readjust setting of
feedback lever

eadjustment of Zero, Span

R

djustment

A

eplace regulator

R
Readjust Seat Adjuster

Tighten connection

eplace Cam Shaft

R

©Copyright 2014 Dwyer Instruments, Inc. Printed in U.S.A. 4/14 FR# RV-443333-00 Rev. 7

PROXIMITY DIV., DWYER INSTRUMENTS, INC.

P.O. BOX 358 • MICHIGAN CITY, INDIANA 46360 U.S. A.

Phone: [phone] www.dwyer-inst.com
Fax: [phone] e-mail: [e-mail]