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EB 8385 EN

7

Design and principle of operation

Fig. 1 · Functional diagram

1

Supply

2

i

14

14

13

12 11

10

9

8

3

p

e

p

e

p

st

p

st

4

5 6

7

Span

Booster

direction of action >>

Booster

direction of action <>

Travel

Zero

1 Pressure regulator

2 i/p converter

3 Measuring spring

4 Diaphragm lever

5 Adjustment screw for

zero

6 Lever

7 Range spring

8 Adjustment screw for

span

9 Clamping screw

10 Clamp

11 Rotary axis

12 Booster

13 Double plug

14 Screw

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Содержание 3760

Страница 1: ...Mounting and Operating Instructions EB 8385 EN Edition July 2012 Pneumatic Positioner Electropneumatic Positioner Type 3760 Type 3760 Positioner ...

Страница 2: ... 13 3 2 Electrical connections 14 3 2 1 Switching amplifier 14 4 Operation Setting 15 4 1 Starting point and reference variable 15 4 2 Adjustment for Actuator stem extends 16 4 3 Adjustment for Actuator stem retracts 17 5 Adjusting the limit switch 18 5 1 Retrofitting a limit switch 18 6 Converting the positioner 20 6 1 Conversion from pneumatic p p to electropneumatic i p 20 6 2 Conversion from e...

Страница 3: ...who have undergone special training or instructions or who are autho rized to work on explosion protected devices in hazardous areas 4 Any hazards that could be caused by the process medium the operating pres sure the signal pressure or by moving parts of the control valve are to be pre vented by means of the appropriate measures If inadmissible motions or for ces are produced in the actuator as a...

Страница 4: ...0 1 3 8 Additional equipment Without Inductive proximity switches 0 1 Pneumatic connections G 1 8 1 8 NPT 1 2 Electrical connections Without M20 x 1 5 blue M20 x 1 5 black Connector DIN 43650 0 1 2 3 Reference variable 0 2 to 1 bar 3 to 15 psi 4 to 20 mA with i p module 6109 0 to 20 mA with i p module 6112 1 to 5 mA with i p module 6112 0 1 2 2 0 1 2 3 ...

Страница 5: ...s with Type 3277 Actuator 15 mm travel 0 2 to 1 bar signal pressure 120 cm 2 s 240 cm 6 s 350 cm 8 s Permissible ambient temperature 20 to 70 C Down to 30 C with metal cable gland Down to 40 C with metal cable gland and Type 6112 i p Converter Limits in test certificates additionally apply for explosion protected devices 40 to 70 C for Type 3760 00x000 Pneumatic Positioner without inducti ve limit...

Страница 6: ...ample is directly passed on to the electropneumatic converter i p converter where it is converted into a proportional pressure signal pe The pressure signal pe produces a force on the measuring diaphragm 3 which is bal anced by the force of the range spring 7 The deflection of the diaphragm 3 causes the diaphragm lever 4 to move The double plug 13 in the booster 12 follows this mo tion producing a...

Страница 7: ...pst pst 4 5 6 7 Span Booster direction of action Booster direction of action Travel Zero 1 Pressure regulator 2 i p converter 3 Measuring spring 4 Diaphragm lever 5 Adjustment screw for zero 6 Lever 7 Range spring 8 Adjustment screw for span 9 Clamping screw 10 Clamp 11 Rotary axis 12 Booster 13 Double plug 14 Screw ...

Страница 8: ...he screw installed parking position in the hole below the sig nal pressure hole and screw it into the signal pressure hole In this case the signal pressure must be routed from the signal pressure connection output to the actuator using a connecting plate The switchover plate is no longer used Note Switchover and connecting plates are accessories for the 120 cm actuator For details see table on pag...

Страница 9: ...irection of action Right attachment Actuator stem retracts Direction of action Left attachment Direction of action Right attachment Vent plug with filter check valve for IP 65 Fig 3 Signal pressure connection using a switchover plate for 120 cm Hole for signal pressure Screw parking position Seal with filter Marking Symbol Actuator stem extends Actuator stem retracts Attachment Left Right Left Rig...

Страница 10: ...p must be secured to the actuator stem on the opposite side Fig 4 1 Insert the clamp in the yoke next to the actuator stem for 120 cm actuators tilt by 90 prior to inserting it 2 Plug the clamp onto the actuator stem and secure it with the clamping screw Make sure that the clamping screw rests in the groove of the actuator stem and that the clamp is aligned at an exact right angle 3 Hook up the ra...

Страница 11: ...avel Order no 1 Yellow 0 100 0 50 50 100 12 15 6 7 5 6 7 5 1400 6892 2 Red 0 100 6 7 5 1400 6893 3 Green 0 50 12 15 1400 6894 4 Blue 50 100 12 15 1400 6895 5 White 0 100 5 1400 6896 6 Brown 0 100 20 1400 6975 7 Black 0 50 50 100 5 5 1400 6976 Clamping screw Range spring Zero adjuster Span adjuster Span adjuster ...

Страница 12: ...version with hook up for 6 mm pipe diameter Additional tee piece CrNiMo steel Additional pipe socket CrNiMo steel 1400 6900 8582 0721 8582 3330 Accessories for Type 3277 5 Actuator 120 cm Switchover plate old for actuator 3277 5xxxxxx 00 old 1400 6819 Switchover plate new for actuator 3277 5xxxxxx 01 new 1400 6822 Connecting plate old G 1 8 for actuator 3277 5xxxxxx 00 old 1 8 NPT 1400 6820 1400 6...

Страница 13: ...ure depends on the bench range and the direction of action fail safe action of the actuator The bench range is indicated as spring range or signal pressure range on the nameplate the direction of action is speci fied by a symbol Actuator stem extends Fail safe action valve CLOSED with globe and angle valves Required supply pressure upper bench range value 0 2 bar at least 1 4 bar Actuator stem ret...

Страница 14: ...08 VDE 0165 Part 1 when installing intrinsi cally safe circuits The Subclause 12 2 2 7 applies when running multi core cables con taining more than one intrinsically safe cir cuit In particular the radial thickness of the con ductor insulation for common insulation ma terials such as polyethylene must have a minimum radial thickness of 0 2 mm The diameter of an individual wire in a fine stranded c...

Страница 15: ...e relevant regulations 4 Operation Adjustment 4 1 Starting point and reference variable The built in range spring of the positioner is assigned to the rated valve travel and the in put signal reference variable as specified in the range spring table on page 11 Normally the reference variable span is 100 0 8 bar or 16 mA A smaller span of for example 50 0 4 bar or 8 mA is only required for split ra...

Страница 16: ...pressed air to the supply in put SUPPLY 9 also see section 3 1 2 4 2 Adjustment for actuator with fail safe action Actuator stem extends NOTICE To ensure that the full closing force can be effective at the control valve the diaphragm chamber must be completely vented when reaching the lower range value direction of action or the upper range value direc tion of action of the reference variable Ther...

Страница 17: ...ith fail safe action Actuator stem retracts NOTICE For actuator version Actuator stem re tracts the diaphragm chamber must be loaded with a pressure that is sufficient to tightly close the valve even when upstream pressure of the plant prevails The upper range value of the reference vari able must be 1 bar or 20 mA direct direc tion of action and the lower input range value must be 0 2 bar or 4 mA...

Страница 18: ...ravel NOTICE If you change the span the zero point must be readjusted as well 7 Check upper range value again Read just both values until they are correct 8 When you have completed the correc tion work adjust input signal to 1 bar 20 mA again 9 Turn ZERO adjustment screw 5 again until the required signal pressure sec tion 3 1 2 on page 13 is indicated on a pressure gauge installed in the signal pr...

Страница 19: ...to be adjusted 1 The yellow switching point indicator 7 must be within the area of the notch mark 6 If this is not the case turn ad justment screw 4 2 Move control valve to the desired switching position Turn adjustment screw 4 until the switching point is reached This will be indicated by the switching amplifier The switching element and the levers re quired to operate it are slightly sensitive t...

Страница 20: ...o the terminal base using two screws 3 Attach positioner to the actuator 4 Fix bracket with pin 5 on the clamp at tached to the actuator stem and secure it with screws Make sure that the pin 5 is located in the recess of the operating lever 3 5 Connect the switching amplifier to the terminals and using cable glands or connectors 6 Refer to section 5 for adjustment 20 EB 8385 EN Adjusting the limit...

Страница 21: ... housing and replace it with a cable gland or plug connector 3 Undo both mounting screws in the housing Remove connecting plate 2 with seal 3 4 Unscrew PCB from the terminal base 5 Insert connecting cable included in the retrofit kit through the terminal base into the housing 6 Push blue connector into the middle con nection Connect other end to the i p module for i p module 6109 connec tor with b...

Страница 22: ...se Remove blue connector and pull out the connecting cable 5 Reinstall PCB on the terminal base using screws 22 EB 8385 EN Conversion and retrofit kits Order numbers Pneumatic to electropneumatic conversion model index 01 or higher With Type 6109 i p module 1 Without limit switch Order no 1400 6988 4 to 20 mA without explosion protection 6109 0010 With limit switch Order no 1400 6904 Pneumatic to ...

Страница 23: ...n mm Dimensions in mm EB 8385 EN 23 110 29 121 17 35 OUTPUT 36 38 Ø40 SUPPLY IN SIGNAL 27 9 84 36 128 48 M20 x 1 5 Pressure gauge for signal pressure Connector acc to DIN 43650 Pneumatic connections G 1 8 or 1 8 NPT ...

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Страница 36: ...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 8385 EN 2012 07 ...

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