OOPPEERRAATTIIOONN MMAANNUUAALL

FFOORR

CCYYLLIINNDDEERR PPOOSSIITTIIOONNEERR

MMOODDEELL IIPP220000

14 Winterton Road Suite 302, 63-79 Parramatta Road Clayton Silverwater Victoria 3168 NSW 2128

Ph: (03) 9544 7333 Ph: (02) 9647 2432 Fax: (03) 9543 6706 Fax: (02) 9647 2599 Email: chemex@acromet.com.au Web: www.acromet.com.au

Model IP 200 Cylinder Positioner

Contents

1. INTRODUCTION ............................................................................................................................. 1

2. SPECIFICATIONS........................................................................................................................... 1

3. OPERATION (Ref. Fig. 1) ................................................................................................................ 2

4. USER INFORMATION ..................................................................................................................... 3

5. TROUBLESHOOTING ..................................................................................................................... 4

6. DIMENSIONS (Millimeter) ................................................................................................................ 5

7. PARTIAL ASSEMBLY...................................................................................................................... 6

Model IP 200 Cylinder Positioner

Page 1

MODEL IP 200

CYLINDER POSITIONER

1. INTRODUCTION

The IP 200 Positioner provides accurate and stable positioning of air cylinders used in

process control, servo control and other general industries. The unit is a compact design

for easy installation and maintenance.

2. SPECIFICATIONS

Supply Pressure 3 – 7 kg/cm2

Signal Pressure 0.2 – 1 kg/cm2

Linearity Less than ± 2%

Hysteresis Less than 1%

Repeatability Less than 1%

Sensitivity Less than 1%

Air Consumption Less than 22 NL/min

Maximum Air Flow 250 NL/min (at 5 kg/cm2 supply)

Supply Pressure Variation 0.5% (at 5 ± 0.5 kg/cm2 supply)

Applicable Cylinder (mm) 50 or larger diameter; 300 or shorter stroke

Operating Temperature -5ºC – 60ºC

Response Time Refer to the chart below

Model IP 200 Cylinder Positioner

Page 2

3. OPERATION (Ref. Fig. 1)

Signal pressure from the controller enters the input chamber (2). The difference in

pressure causes the diaphragms (3) to move, varying the clearance between the nozzle

and diaphragms. This changes the back pressure in the nozzle. If the force of

diaphragm (5) is greater than that of diaphragm (6), the spool (7) slides across,

permitting the supply air to enter the cylinder through OUT 1 and allowing the air in OUT

2 to exhaust. The motion of the cylinder stem is transmitted to the feedback spring (10)

through the connecting rod (9). The cylinder stem moves on until the feedback spring

force balances with the force of the input chamber (2). Consequently, the cylinder can

be positioned exactly in relation to the signal pressure. Span Adjuster 911) and Zero

Adjuster (12) are provided for the adjustment of the feedback spring.

Model IP 200 Cylinder Positioner

Page 3

4. USER INFORMATION

4.1. Supply air must be dry and dust free. An SMC Mist Separator is recommended

for perfect filtration.

4.2. If the cylinder requires air line lubrication, the lubricator should be installed in

the output air lines and not in the supply air lines.

4.3. The Positioner should be protected from vibration as it may cause oscillation of

the feedback spring.

4.4. Use copper or brass tubes for pipe line arrangement and blow them out before

installation.

4.5. For slower cylinder speed, install speed control valves as illustrated below.

4.6. For faster cylinder speed, install booster relay and metering valves as illustrated

below. Metering valves control exhaust speed.

4.7. Speed control may be required when cylinder operates too fast 92 sec/full stroke

or less), to avoid overshooting or hunting.

Model IP 200 Cylinder Positioner

Page 4

5. TROUBLESHOOTING

Trouble Possible Causes Solutions

Cylinder does not move

when signal pressure increases or decreases.

Fixed orifice is clogged Remove the orifice and

clean it with a pin of 0.4 mm diameter.

Cylinder only responds intermittently to signal.

Dust is restricting the movement of spool.

Fixed orifice is clogged.

Clean spool and sleeve.

Clean the orifice

Cylinder does not operate when signal increases past

0.2 k/cm2; or, cylinder operates with signal of less than 0.2 kg/cm2.

Zero Adjusting Screw is not correctly adjusted.

Loosen the lock nut and adjust Zero point.

Cylinder stroke obtained is not in relation to the input air pressure (0.2 – 1.0

kg/cm2).

Incorrect span adjustment. Remove the set screw on the outer tube and adjust while maintaining input

signal at 0.6 kg/cm2. The span is adjusted by changing number of effective turns on the

spring. Zero adjustment should also be checked.

Model IP 200 Cylinder Positioner

Page 5

6. DIMENSIONS (Millimeter)

Model IP 200 Cylinder Positioner

Page 6

7. PARTIAL ASSEMBLY