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  5. Mounting And Operating Instructions

Samson 3725 series Mounting And Operating Instructions - Operation

Manual is about: electropneumatic positioner

Summary of 3725 series

  • Page 1

    Series 3725 electropneumatic positioner type 3725 mounting and operating instructions eb 8394 en (1300-1621) firmware version 1.0x edition february 2012 fig. 1 · type 3725 positioner.

  • Page 2

    2 eb 8394 en warning! Indicates a hazardous situation which, if not avoided, could result in death or serious injury. Notice indicates a property damage message. Note: supplementary explanations, information and tips definitions of the signal words used in these instructions.

  • Page 3

    Contents page 1 safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2 article code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3 design and principle of operation. . . . . . . . . . . . . . . . . . . . 8 3.1 technical data. . . . . . . . . . . . . . . . . . ...

  • Page 4

    7.12 faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 8 code list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 9 maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 10 servicing explosion-protected devices . . . . . . . . . . . . . ...

  • Page 5

    Eb 8394 en 5 firmware revisions firmware revisions 1.02 (previous) 1.03 (new) internal revisions.

  • Page 6: Safety Instructions

    1 safety instructions for your own safety, follow these instructions concerning the mounting, start up and opera- tion of the positioner: 4 the positioner is to be mounted, started up or operated only by trained and experi- enced personnel familiar with the product. According to these mounting and o...

  • Page 7: Article Code

    2 article code eb 8394 en 7 article code positioner type 3725- x x x 0 0 0 0 0 0 0 9 9 9 9 with lcd and autotune, 4 to 20 ma reference variable explosion protection* without 0 0 0 ii 2 g ex ia iic t4 acc. To atex 1 1 0 0 * other approvals in preparation.

  • Page 8: Design and Principle of

    3 design and principle of operation the electropneumatic positioner is mounted on pneumatic control valves. It is used to as- sign the valve stem position (controlled vari- able x) to the control signal (reference vari- able w). The electric control signal received from a control system is compared ...

  • Page 9

    Eb 8394 en 9 design and principle of operation % s mm % mm q 3 4 11 6 7 8 10 1 w 9 x y 2 5 fig. 2 · functional diagram 1 control valve 2 amr sensor 3 a/d converter 4 microcontroller 5 d/a converter 6 i/p converter 7 air capacity booster 8 pressure regulator 9 fixed restriction 10 volume restriction ...

  • Page 10: 3.1 Technical Data

    3.1 technical data 10 eb 8394 en technical data type 3725 positioner travel, adjustable direct attachment to type 3277 actuator: 3.75 to 30 mm attachment acc. To iec 60 534-6-1 (namur): 3.75 to 50 mm attachment to type 3372 actuator: 15/30 mm attachment to rotary actuators: 24 to 100° reference vari...

  • Page 11

    Eb 8394 en 11 technical data materials housing polyphthalamide (ppa) cover polycarbonate, transparent external parts stainless steel 1.4571 and 1.4301 cable gland polyamide, black, m20 x 1.5 weight approx. 1.0 kg.

  • Page 12: Attachment to The Control

    4 attachment to the control valve – mounting parts and accessories warning! Attach the positioner, keeping the following sequence: 1. Mount the positioner on the control valve 2. Connect the supply air 3. Connect the electrical power 4. Perform the start-up settings the positioner is suitable for th...

  • Page 13

    Eb 8394 en 13 attachment to the control valve – mounting parts and accessories travel tables note: the lever m is included in the scope of delivery. Direct attachment to type 3277-5 and type 3277 actuators actuator size rated travel adjustment range at positioner required lever assigned pin position...

  • Page 14: 4.1 Direct Attachment

    4.1 direct attachment 4.1.1 type 3277-5 actuator refer to table 1 on page 26 for required mounting parts and accessories. Note the travel table on page 13! Actuator with 120 cm² depending on the type of positioner attach- ment, the signal pressure is routed either left or right of the yoke through a...

  • Page 15

    Eb 8394 en 15 attachment to the control valve – mounting parts and accessories symbols actuator stem extends attachment left attachment right actuator stem retracts 1 lever 1.1 nut 1.2 disk spring 2 follower pin 3 follower clamp 4 screw 5 stopper 6 connecting plate 6.1 seal rings 7 pressure gauge br...

  • Page 16

    Additional solenoid valve if a solenoid valve is additionally mounted onto the actuator, the signal pressure port at the back of the positioner must be sealed. To do this, unscrew the screw located in the middle hole (screw in park position) and screw it into the signal pressure port to seal it. In ...

  • Page 17: 4.1.2 Type 3277 Actuator

    4.1.2 type 3277 actuator refer to table 2 on page 26 for the required mounting parts as well as the accessories with their order numbers. Note the travel table on page 13! Note: the actuators with 240 to 700 cm² ef- fective areas are described on the following pages. Eb 8394 en 17 attachment to the ...

  • Page 18

    Actuators with 240 to 700 cm² the positioner can be mounted either on the left or right side of the yoke. The signal pres- sure is routed to the actuator over the con- nection block (12), for actuators with fail-safe action "actuator stem extends" in- ternally through a bore in the valve yoke and fo...

  • Page 19

    Eb 8394 en 19 attachment to the control valve – mounting parts and accessories 1 lever 1.1 nut 1.2 disk spring 2 follower pin 3 follower clamp 11 cover 12 connection block 12.1 screw 12.2 stopper or connection for external piping 15 formed seal 16 gasket 2 10 15 1 2 3 11 1.1 1.2 12.1 12 16 16 12.2 s...

  • Page 20: 4.2 Attachment According to

    4.2 attachment according to iec 60534-6 the positioner is attached to the control valve with a namur bracket (10). Refer to table 3 on page 26 for the required mounting parts as well as the accessories with their order numbers. Note the travel table on page 13! 1. Screw the two bolts (14) to the bra...

  • Page 21

    Eb 8394 en 21 attachment to the control valve – mounting parts and accessories 10 11 14.1 3 14 1 1.2 1.1 2 9.1 9 6.1 6 7 8 fig. 10 · attachment according to iec 60534-6 (namur) 1 lever 1.1 nut 1.2 disk spring 2 follower pin 3 follower plate 6 connecting plate 6.1 seal rings 7 pressure gauge bracket ...

  • Page 22

    22 eb 8394 en attachment to the control valve – mounting parts and accessories.

  • Page 23: 4.3 Attachment to Type 3372

    4.3 attachment to type 3372 actuator (v2001) the type 3725 positioner is already in- cluded in the scope of delivery for v2001 valve series (type 3372 actuator). The attachment is briefly described below to allow conversion work to be performed. Actuator 120 and 350 cm², stem extends the signal pres...

  • Page 24: 4.4 Attachment to Rotary

    4.4 attachment to rotary actuators the positioner is mounted to the rotary actu- ator using a mounting bracket. Refer to table 4 on page 27 for the re- quired mounting parts as well as the acces- sories. Before attaching the positioner onto the samson type 3278 rotary actuator (160 cm²) or vetec typ...

  • Page 25

    Eb 8394 en 25 attachment to the control valve – mounting parts and accessories 80 50 60 30 6 6.1 7 8 1 1.1 1.2 2 4.1 3 10.1 10 5 4 4.2 attachment according to vdi/vde 3845, level 2 30 50 80 6 6.1 7 8 1 1.1 1.2 2 4.1 3 10.1 10 5 13 10.1 4 4.2 attachment to samson type 3278 rotary actuator (160 cm²) o...

  • Page 26

    4.5 mounting parts and accessories 26 eb 8394 en attachment to the control valve – mounting parts and accessories table 1 · direct attachment to type 3277-5 actuator (see section 4.1) order no. Mounting parts mounting parts for actuators 120 cm² or smaller 1402-0239 accessories for the actuator swit...

  • Page 27

    Eb 8394 en 27 attachment to the control valve – mounting parts and accessories table 4 · attachment to rotary actuators (see section 4.4) order no. Mounting parts attachment according to vdi/vde 3845 (level 2*), 20 mm shaft height 1402-0243 attachment according to vdi/vde 3845 (level 2*), 30 mm shaf...

  • Page 28: Connections

    5 connections 5.1 pneumatic connections notice the threaded connections in the positioner housing are not designed for the direct con- nection of pneumatic fittings! The screw fittings must be screwed into the connecting plate, the pressure gauge mount- ing block or the connection block from the acc...

  • Page 29: 5.2 Electrical Connections

    D = seat diameter [cm] d p = differential pressure across the valve [bar] a = actuator diaphragm area [cm²] f = upper bench range value [bar] if there are no specifications, calculate as follows: required supply pressure = upper bench range value + 1 bar. Note: the signal pressure at the output (38)...

  • Page 30

    Selecting cables and wires: observe clause 12 of en 60079-14: 2008 when installing intrinsically safe circuits. The subclause 12.2.2.7 applies when run- ning multi-core cables containing more than one intrinsically safe circuit. In particular, the radial thickness of the con- ductor insulation for c...

  • Page 31

    Accessories: plastic cable gland m20 x 1.5: – black order no. 8808-1011 – blue order no. 8808-1012 eb 8394 en 31 connections +11 -12 fig. 15 · electrical connections ma control signal.

  • Page 32: Operation

    6 operation three capacitive keys and a lcd are used to operate the positioner. To adapt the air capacity, the volume restric- tion must be adjusted (section 7.2). 6.1 operator controls press or to select parameter codes (p0 to p20). Press to confirm the se- lected code. Notice any parameter code se...

  • Page 33: Start-Up – Settings

    Volume restriction q the volume restriction is used to adapt the air delivery to the actuator size. Two fixed settings are possible depending on how the air is routed to the actuator. Refer to sec- tion 7.2. Display reading on display meaning esc cancel err error low w too small man manual mode max ...

  • Page 34: 7.1 Enabling Configuration

    Display after connecting the electrical sig- nal the fault indication icon and s (fail-safe position) appear on the display when the positioner has not yet been initialized. The reading indicates the lever positioner in de- grees relative to the longitudinal axis. 4 code 0 appears on the display aft...

  • Page 35: 7.3 Adapting The Display

    7.2 setting the volume restriction q the volume restriction q is used to adapt the air delivery to the size of the actuator: 4 actuators with a transit time , e.G. Linear actuators with an effective area smaller than 240 cm², require a re- stricted air flow rate (min setting). 4 actuators with a tra...

  • Page 36: 7.4 Entering The Opening

    7.4 entering the opening direction 4 air to open/ato applies to a valve opening as the signal pressure increases. 4 air to close/atc applies to a valve closing as the signal pressure increases the signal pressure is the pneumatic pres- sure at the output of the positioner applied to the actuator. En...

  • Page 37

    7.7 setting other parameters the following table lists all the parameter codes and their default settings. If you want to change the default setting of a parameter, proceed in the same manner as previously described. Note: the selected parameter code remains active until you change the setting or ex...

  • Page 38: 7.8 Initialization

    7.8 initialization during initialization the positioner adapts it- self optimally to the friction conditions and the signal pressure required by the control valve. The type and extent of self-adaptation de- pends on the preset parameters. Max is the default setting for the nominal range (code p4). D...

  • Page 39: 7.9 Zero Calibration

    Canceling initialization the initialization can be canceled by press- ing . Canceling initialization 4 esc blinks on the display. 4 press to confirm the code. Note: this code must be confirmed by press- ing . Otherwise, the code remains active. Example 1: a positioner that has not yet been initializ...

  • Page 40: 7.10 Manual Mode

    Canceling zero calibration the zero calibration can be canceled by pressing . 4 esc blinks on the display 4 press to confirm the code. Note: this code must be confirmed by press- ing . Otherwise, this code remains active. The positioner returns to closed-loop opera- tion without performing a zero ca...

  • Page 41: 7.11 Reset

    System deviation between the manual and automatic set point while manually moving the valve in code p17. The manual set point is adjusted in steps of 0.1 %. You can move the valve controlled within its range. Positioner that has not been initialized keep or pressed to move the valve manually. The va...

  • Page 42: 7.12 Faults

    7.12 faults on the occurrence of a fault, the fault indication icon appears at the bottom of the display. If the fault indication icon appears after a parameter code setting has been changed, this indicates that these settings do not match the values determined during initial- ization. See code e1 (...

  • Page 43: Code List

    8 code list code display, values [default setting] description parameter codes codes marked with * can be changed without having to re-initialize the positioner p0 status indication mode of the display showing basic information the reading indicates the valve position or the angle of rotation in % w...

  • Page 44

    P6 * reference variable [4...20 ma] srlo/srhi for split-range operation srlo – low range 4 to 11.9 ma srhi – high range 12.1 to 20 ma p7 * w/x [>>] / direction of action of the reference variable w to the travel/rota- tional angle x (increasing/increasing or increasing/decreasing). P8 gain k p 30/[5...

  • Page 45

    P18 reset parameters are reset to their default setting. The positioner can only return to closed-loop operation after it has be re-initialized. P19 enable configuration enable configuration to change parameter settings. This function is automatically canceled when none of the keys are not pressed w...

  • Page 46

    E5 standstill detection is not possible (initialization error) supply pressure is too low or varies. Mounting incorrect. Recommended action check supply air and positioner mounting. Re-initialize the positioner. E6 travel is not achieved during initialization (initialization error) supply pressure i...

  • Page 47: Maintenance

    9 maintenance the positioner does not require any mainte- nance. There are filters with a 100 m mesh size in the pneumatic connections for supply and output which can be removed and cleaned, if required. The maintenance instructions of any up- stream supply air pressure reducing stations must be obs...

  • Page 48: Dimensions In Mm

    11 dimensions in mm 48 eb 8394 en dimensions in mm 14 22 m 20x1.5 157.5 108 87 42 21 62.50 25 fig. 18 · dimensional drawing of type 3725.

  • Page 49

    11.1 fixing levels according to vdi/vde 3845 (september 2010) dimensions in mm size a b c Æ d m min Æ d * aa1 80 30 20 5.5 for m5 96 50 aa2 80 30 30 5.5 for m5 96 50 * flange type f05 according to din en iso 5211 eb 8394 en 49 dimensions in mm a m6 c b 25 m min Ød Ød level 2 (bracket surface) level ...

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    Samson ag · mess- und regeltechnik weismüllerstraße 3 · 60314 frankfurt am main · germany phone: +49 69 4009-0 · fax: +49 69 4009-1507 internet: http://www.Samson.De eb 8394 en 2012-06.