Proval A236 Series Manuale utente

PROVAL A236 Series

Smart Valve Positioners

Installation, Operation and Maintenance Manual

1 INFORMATION FOR THE OPERATOR.......................................................................................................3

1.1 CLASSIFICATION OF SAFETY RELATED NOTICES...........................................................................3

1.2 SAFEY AND CAUTIONS.......................................................................................................................... 4

1.3 USE AS INTENDED...................................................................................................................................4

1.4 INSTALL AND MAINTAIN OPERATION.................................................................................................. 5

1.5 LIST OF DELIVERY......................................................................................................................................5

2 SUMMARY.........................................................................................................................................................5

2.1 FUNCTIONS...................................................................................................................................................6

2.2 SPECIALTY....................................................................................................................................................6

2.3 INTEGRATED LIGHTNING PROTECTION CIRCUIT............................................................................ 7

3TECHNICAL DATA........................................................................................................................................... 8

4INSTALLATION................................................................................................................................................. 9

4.1 DIMENSIONS.................................................................................................................................................9

4.2 INSTALLATION.......................................................................................................................................... 9

5OPERATION.................................................................................................................................................... 20

5.1 INTERFACE DESCRIPTION.....................................................................................................................20

5.1.1 DISPLAY................................................................................................................................................... 20

5.1.2 BUTTONS................................................................................................................................................. 20

5.2 CONFIGURATION MODE......................................................................................................................... 21

5.2.1 ENTERING CONFIGURATION MODE................................................................................................ 21

5.2.2 CHOOSING A PARAMETER FOR CONFIGURATION.................................................................... 21

5.2.3 CHANGING A PARAMETER.................................................................................................................22

5.2.4 RESET USER PARAMETERS.............................................................................................................. 23

5.2.5 EXITING CONFIGURE MODE.............................................................................................................. 23

5.3 INITIALIZATION....................................................................................................................................... 23

5.3.1 CHECK BEFORE INITIALIZATION......................................................................................................23

5.3.2 AUTO TUNING......................................................................................................................................... 24

5.3.3 MANUAL TUNING................................................................................................................................... 25

5.4 DIAGNOSIS MODE.................................................................................................................................... 26

5.4.1 ENTERING DIAGNOSIS MODE........................................................................................................... 26

5.4.2 EXITING THE DIAGNOSIS MODE.......................................................................................................26

5.4.3 THE DIAGNOSTIC PARAMETER........................................................................................................ 26

5.5 ALARM.......................................................................................................................................................27

5.5.1 ZERO POINT OF POSITION SENSOR TOO LOW........................................................................... 27

5.5.2 SPAN POINT OF POSITION SENSOR TOO HIGH...........................................................................27

5.5.3 INITIALIZATION ERROR....................................................................................................................... 27

5.5.4 MEASUREMENT SPAN IS INSUFFICIENT....................................................................................... 27

5.5.5 USER CHARACTERISTICS SETTING ERROR.................................................................................28

5.5.6 FEEDBACK OVER LIMITS.................................................................................................................... 28

5.5.7 INPUT CURRENT OUT OF WORK RANGE...................................................................................... 28

5.5.8 ACTUATOR ERROR............................................................................................................................... 28

6USER PARAMETER.......................................................................................................................................29

6.1 PARAMETER LIST..................................................................................................................................... 29

6.2 PARAMETERS............................................................................................................................................ 31

7FAULT AND MAINTENANCE....................................................................................................................... 38

7.1 TROUBLE SHOOTING...............................................................................................................................38

7.2 MAINTENANCE........................................................................................................................................ 39

8TRANSPORTATION AND STORAGE.........................................................................................................39

9ORDERING INFORMATION......................................................................................................................... 40

9.1 THE DETAIL PRODUCT MODELS IS IN THE FOLLOWING........................................................... 40

9.2 FEEDBACK CONNECTION................................................................................................................... 41

1 Information for the Operator

Please read this manual carefully before starting work!

1.1 Classification of Safety Related Notices

Ensure that you are safe in installing, commissioning and maintaining this instrument. Please pay

attention to the warning and notice texts.

WARNING

Potentially hazardous situation!

Non-observance could result in serious injury!

NOTICE

Hazardous situation!

Non-observance may result in minor or moderate injury!

NOTE

Important information in order to understand the machine for optimized

operation

1.2 Safeyand Cautions

NOTE

1. The design of this equipment meets the advanced safety requirementsand it

is safe and effective when the factory is tested out of the factory

2. This equipment is complied with the relevant rules and standards

3. The equipment manufacturer reserves the right to modify technical

parameters without prior notice

4. The permitted storage transport and operating temperature must be

observed

5. The equipment must be connected in accordance with the connection

diagram in the manual

6. The information contained in the nameplate wire connection diagram and

warning icons attached to the equipment must be followed

7. There are corresponding marks on the nameplates of equipment used in

hazardous areas. When operating equipment in a hazardous area, the relevant rules

must be complied with. The installation specifications, connection parameters, and

safety instructions provided in the Ex flameproof document must be complied with.

1.3 Use as intended

NOTE

1. The use may constitute a risk to life and limb of the user of third parties,or

cause damage to the machine and to other material property in the event that

use as not intended this is not allowed, .

2. The manufacturer will not responsible for damage caused by improper

operation or used as not intended.

1.4Install and Maintain Operation

NOTE

1. Installation, commissioning, operation, maintenance and repair of the

instrument requires special knowledge and should be performed only by

qualified personnel.

2. For installing this instrument, the operator must read the user's manual

and comply with the rules.

3. When the instrument is installed, it should be in the state of power off and

no external load is overstressed.

4. The instrument must not be modified or repaired unless the user is

according to the manual.

5. Repairs that are not described in the supplied operation manual may only

be carried out directly by the manufacturer or by the service organization.

6. If the welding operation is carried out near the equipment, the grounding

of the welding equipment must not be carried out through this equipment.

1.5List of Delivery

A236 smart valve positioner.

User's manual

Ordered spare partsOptional

2Summary

A236 smart valve positioner is a two-wire system instrument. The positioner is a control accessory

of pneumatic valve. It is widely used in automatic control systems of petroleum,chemical,

electricity, metallurgy, paper and pulp industry and other fields.

A236 smart valve positioner accepts the 4~20mA valve setting analog signal from the control

system.

This valve setting value will be converted by an analog to digital converter (ADC) to digital signal then

input to CPU. At the same time, instrument gets the actual valve position from location sensors. The two

signals are compared by the instrument software so as to control the intake and exhaust of the

pneumatic actuator, and drive the valve to reach setpoint (refer to Figure2-1)

A236 smart valve positioned is based on microprocessor technology. It can overcome friction and

the imbalance power on the control valve well, and improve the response speed of control valve, which

makes the position set rapidly and accurately. It is not only able to completely substitute conventional

valve positioner, but also is able to directly access HART network, exchanging information between

control system and positioner.

A236 smart valve positioner is complied with the IEC60079-0:2017Explosive atmospheres - Part

0:Equipment - General requirements and Explosive atmospheres - Part 11: Equipment protection

intrinsic safety "i". A236 smart valve positioner is complied with Electrical apparatus for use in

the

presence of combustible dust - Part 11: Protection by intrinsic safety 'iD'.

Fig2-1 A236 Valve Positioner Principle

2.1 Functions

Self-adaption function: automatically set the Zero and Span of control valve, and optimize the control

parameters to improve the control precision.

Configuration function: valve characteristic curve, action mode, dead band, stroke range, shut-off

value and alarm events, .

Self-diagnosis function: show the value of setpoint current, travel time, and dead band.

Fault mode function: fail safe (function open/close) or fail freeze (function hold).

Communication function: HART communication protocol.

Feedback function: 4~20mADC valve position feedback signal, switch valve feedback signal.

2.2 Specialty

Positioning precision: 0.5%F.S.

The operation does not need to open the cover.

Simple and compact design, modular construction

Automatic initialization, automatic diagnosis, dynamic setting of valve characteristic curve

Less components, better anti-vibration performance

Local or remote parameters configuration

Less power and air consumption, less operation cost for customers.

Two-wire supply in 4-20mA standard

The integrated lightning protection module can be selected to reduce the damage probability of the

locator due to the surge of lightning

2.3 Integrated lightning protection circuit

With the development of technologies, the smart valve positioner becomes more intelligent with

communication bus technology. Therefore, it is inevitable to use a number of highly integrated

components, which will depress the performance of overcoming overvoltage, over current and anti-surge.

When lightning coming, these components can be easily damaged, which will lead to positioner failure. If

the control valve is use for critical process control or on high reliability position, the lightning may cause

production out of control or accident because of the sudden failure of the positioner. Normal smart valve

positioner is easy to be damaged by lightning. It is dangerous for production activities. In order to solve

this problem, A236 has surge protection function by a built-in surge discharge circuit.

NOTE

1. The lightning protection function is an optional function;

2. It must be grounded according to relevant standards, when installing the

lightning protection positioner.

3 Technical Data

Pneumatic

Supply Air Pressure 0.140.7 MPa

Valve Leakage <0.6L / H

Air Consumption <36L / H

Air Supply

According to ISO8573-1

Size and density of particulates: Class 4

Oil concentration: Class 4

Dew point: Class 4 or 10K below operating temperature

Input/Output

Actuator Single acting, Double acting

Travel Range Linear: 10~100mm(10-20mm,1:6 transmission ratio is optional);

Rotation angle:30~105º

Input Current 4~20mADC,Minimum input current:>3.8mA,split range start and end

point adjustable

Feedback Output 420mA DC

Digital Input 1 dry contract

Digital Output Electronic switch:2 channel

Piezo Valves Switch

Time Average failure free time: >2billion

Output Characteristic Linear, 1:30, 30:1, user defined (20points)

Communication HART

Display

LCD 2×7 digitals, dimension:22×38mm

Pressure Gauge Optional, displaying the in and out pressure

Operate

Self Tuning Automatic calibrate the Zero and Span, dead band

Self Diagnose Show the value of input current , travel time, dead band, etc.

Manual 3 keys on the front panel

Precision

Dead Zone 0.1~10%adjustable

Linearity ±0.5% FS

Hysteresis 0.5% FS

Environment

Ambient Temperature

Range

General type:-(40~80)°C

Intrinsic safety: -40~+50°C(T6) /65°C(T5) /80°C(T4)

Relative Humidity 595%RH

Vibration Resistance 15150Hz@2g

IP Protection Level IP65According to customer needs

Explosion-Proof Type Exia IIC T4~T6 Ga, Exia D 20 T80/T95/T130

Appearance

Weight 2 .0 kg

Dimension 170×96×92mm

Housing Material Aluminium Die casting

4 Installation

4.1 Dimensions

Fig 4-1 A236 Dimensional drawing

4.2 Installation

4 2 1 General. .

Fig. 4-2 shows the positioner feedback indicator and the arrow which indicate the rotating range.

The shown position is the middle position of the rotating range. Without initialization, the LCD feedback

value should be about 50.0 and the bottom row displays NOINI. The two dotted lines are the limit

positions of the feedback rotating range in normal status. The position sensor was adjusted before out of

factory.

Fig.4-3 is the image which shows that positioner is mounted on a linear actuator with standard

feedback lever. The recommended feedback angle is from 40° to 60°on a linear actuator.

Fig. 4-4 is the image which shows that positioner is mounted on a rotary actuator with standard

feedback lever

Indice

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