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EB 8355-2 EN

Operation

100%

20 mA

100%

< >

< <

< >

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Reference variable

Input signal

Dead band

Open

Travel

Closed

Valve 2

Valve 1

Fig. 13:

Normal or split-range operation

5.1.1 Adjusting the proportional

band Xp and air delivery

Close the volume restriction (11) as far

as the required positioning speed
permits.

Check the positioning speed by pushing
the diaphragm lever (3) as far it will go.

Adjust the reference variable at the input
to approx. 50 % of its range.

Turn the zero adjuster (6.2) until the
valve has reached approx. mid-travel.

Use the adjuster (8) to set the proportion-
al band X

to a value half way (half

turn).

Check the valve's tendency to hunt and

the positioning speed by briefly tapping
the diaphragm lever (3).
The X

value is to be adjusted to be as

small as possible, without considerable

overshooting occurring.

NOTICE

Always adjust the X

restriction be-

fore setting the starting point.

Changing it later will cause the zero

point to be shifted.

Содержание 3767

Страница 1: ...Mounting and Operating Instructions EB 8355 2 EN Edition December 2016 Type 3767 Electropneumatic Positioner Fig 1 Type 3767...

Страница 2: ...if not avoided will result in death or seri ous injury WARNING Hazardous situations which if not avoided could result in death or seri ous injury NOTICE Property damage message or mal function Note A...

Страница 3: ...3 2 Mounting the intermediate piece 26 3 3 3 Basic setting of the cam disk 28 3 3 4 Reversing amplifier for double acting actuators 32 4 Connections 34 4 1 Pneumatic connections 34 4 1 1 Pressure gaug...

Страница 4: ...tting the positioner 47 6 1 Converting from electropneumatic to pneumatic 47 6 2 Installing the limit contacts 48 6 3 Installing a solenoid valve 48 6 4 Removing the solenoid valve 49 7 Servicing expl...

Страница 5: ...e caused in the valve by the process medium the signal pres sure or by moving parts are to be prevented by taking appropriate precautions If inadmissible motions or forces are produced in the pneumati...

Страница 6: ...ozzle 2 1 or 2 2 depending on the adjusted direction of action of the positioner The supply air is supplied to the booster 10 and the pressure regulator 9 The controlled supply air flows through the X...

Страница 7: ...Measuring diaphragm 6 1 Span adjuster 6 2 Zero adjuster 7 Turnboard 8 XP restriction 9 Pressure regulator 10 Booster 11 Volume restriction 12 Solenoid valve option 13 i p converter 4 13 6 1 6 2 3 7 8...

Страница 8: ...with integrated limit contacts or an integrated solenoid valve since the position transmitter requires most of the space inside The position transmitter is used to assign the valve position i e the v...

Страница 9: ...o 20 mA 1 6 0 0 3 2 way solenoid valve Without 0 6 V DC 2 12 V DC 3 24 V DC 4 Type of mounting Standard range spring 0 1 Pneumatic connections 18 NPT 1 ISO 221 1 G 2 Electrical connections Plastic cab...

Страница 10: ...Proportional band Xp 1 to 2 5 proportional action coefficient Kp 100 to 40 Air consumption At 1 4 bar supply pressure 280 ln h At 6 bar supply pressure 280 ln h With lowest setting of pressure regula...

Страница 11: ...ar 0 5 s 1 s 1 5 s 4 s 0 4 to 2 bar 2 s 2 5 s 8 s 0 6 to 3 bar 1 s 1 5 s 5 s Position transmitter 1 2 Output circuit intrinsically safe Output signal Two wire connection 4 to 20 mA reversible operatin...

Страница 12: ...Ex ia IIC T6 Date 2001 11 29 EC type examination certificate 3767 3 No 1607848 Ex ia IIC T6 Class I Zone 0 Class I II Div 1 Groups A B C D E F D Class I II Div 2 Groups A B C D E F D Date 2005 09 16...

Страница 13: ...EB 8355 2 EN 13 Design and principle of operation...

Страница 14: ...riable decreases the signal pres sure can either decrease direct action or increase reverse action On the turnboard 7 the operating direction is indicated by symbols direct reverse Depending on the po...

Страница 15: ...13 Gasket 16 Cover Switchover plate Signal pressure input Signal pressure input for left attachment Seal with filter With right attachment Marking Marking Symbol Actuator stem extends Actuator stem r...

Страница 16: ...ng screws and lift off the cover Turn the gasket 16 by 180 and re in sert it The old connection block version requires the switch plate 13 to be turned to align the actuator symbol with the arrow mark...

Страница 17: ...in Type 3277 5 Actuators with an effective dia phragm area of 120 cm the exhaust air from the positioner is connected to the spring chamber over an internal hole NOTICE When the valve is installed th...

Страница 18: ...Actuator old G 1 8 Type 3277 5xxxxxx 00 Actuator old 1 8 NPT 1400 6820 1400 6821 New connecting plate Type 3277 5xxxxxx 01 Actuator new or higher G 1 8 and 1 8 NPT 1400 6823 Note Only new switchover...

Страница 19: ...6950 Stainless steel stainless steel 1400 6951 Filter check valve replaces vent plug and increases the degree of protection to IP 65 Filter check valve in housing with G thread Polyamide IP 65 degree...

Страница 20: ...20 EB 8355 2 EN Mounting on control valves...

Страница 21: ...NAMUR attachment IEC 60534 6 3 2 Attachment according to IEC 60534 6 Required mounting parts are listed in Table 5 The rated travel of the valve determines which lever and range spring Table 6 are req...

Страница 22: ...e 6 5 Clamp the clip 21 onto the lever 18 The clip must be clamped onto the lever 18 with the open side facing down ward when the positioner is attached with the air connection at the front 6 Attach t...

Страница 23: ...7a Mounting position Attachment to NAMUR rib Attachment to rods 18 Lever N1 N2 19 Pin 20 Plate 21 Clip 22 Clamping plate 23 Screw 24 Pointer 25 Shaft 26 Lever of positioner 27a Coupling pin 27b Lock n...

Страница 24: ...ies Order no Pressure gauge mounting block G 1400 7458 NPT 1400 7459 Pressure gauge kit Stainless steel brass 1400 6950 Stainless steel stainless steel 1400 6951 Filter check valve replaces vent plug...

Страница 25: ...4 5 coils 1400 6443 Split range operation range spring 1 9 5 coils installed as standard 1400 6442 Cam disk with accessories Order no linear basic characteristic 3 equal percentage basic characterist...

Страница 26: ...er manufacturers Fig 8 right the reverse side of the diaphragm can be purged with air over a pipe connection in stalled between the actuator and intermedi ate piece 3 3 1 Mounting the lever with feele...

Страница 27: ...to VDI VDE 3845 09 2010 Attachment to SAMSON Type 3278 33 Positioner 34 Intermediate piece 35 Lever with feeler roll 36 Adapter 37 Transmission lever 38 Screws 39 Scale 40 Cam disk 41 Actuator shaft 4...

Страница 28: ...7 to adjust the operating direction of the positioner i e whether the valve opens or closes when the reference variable increases direct or reverse Each cam disk carries two cam sections whose startin...

Страница 29: ...erence variable Signal pressure Valve Characteristic Reference variable Signal pressure Valve Characteristic increases increases opens N decreases increases opens I 90 6 0 30 0 90 6 0 30 0 Feeler roll...

Страница 30: ...Valve Charac teristic decreases A1 increases A2 decreases opens I 90 6 0 30 0 90 6 0 30 0 Feeler roll Starting point N Starting point I Hole to secure the cam disk Insert clip and press the flaps outw...

Страница 31: ...aligned cam disk To prevent the cam disk from turning drill a hole into the adapter 36 or coupling 44 to allow a 2 mm dowel pin to be inserted Select one of the four holes located around the center h...

Страница 32: ...er seal 1 4 must remain in stalled 1 Screw the special nuts 1 3 from the ac cessories of the reversing amplifier into the threaded connections of the position er 2 Insert the gasket 1 2 into the reces...

Страница 33: ...y 9 A1 1 5 1 6 Z A2 1 4 A1 A2 Output 38 Supply 9 1 3 1 2 1 1 1 6 Z A1 From the positioner Control signals to the actuator 1 Reversing amplifier 1 1 Special screws 1 2 Gasket 1 3 Special nuts 1 4 Rubbe...

Страница 34: ...haust air hole The exhaust air con nections for these models are included in the accessories The vent plug is located on the plastic cover of the actuator for direct attachment where as for NAMUR atta...

Страница 35: ...cations calculate as follows Required supply pressure Upper bench range value 1 bar Pressure regulator After tilting the cover plate back the pres sure regulator 9 can be continuously ad justed When t...

Страница 36: ...ircuits Clause 12 2 2 7 applies when running multi core cables and wires with more than one intrinsically safe circuit The radial thickness of the insulation of a conductor for common insulating mater...

Страница 37: ...s Device index 3767 x x 03 and lower Cable gland PG 13 5 Black plastic Order no 1400 6781 Blue plastic Order no 1400 6782 Nickel plated brass Order no 1400 6979 Adapter PG 13 5 to NPT Metal to metal O...

Страница 38: ...range value determine the travel of the valve In split range operation Fig 13 right the control valves work with smaller reference variable ranges The controller output signal is used to control two...

Страница 39: ...er 3 as far it will go 2 Adjust the reference variable at the input to approx 50 of its range 3 Turn the zero adjuster 6 2 until the valve has reached approx mid travel 4 Use the adjuster 8 to set the...

Страница 40: ...been completed reduce the input signal and slowly increase it again Check the starting point and the upper range value Repeat the correction pro cedure until both values are correct NOTICE When setti...

Страница 41: ...in standard operation In split range opera tion this value is reduced by half Turn the adjuster clockwise to reduce the travel and counterclockwise to increase it 3 After the correction has been comp...

Страница 42: ...in dicate intermediate positions The switches A and B must be assigned to the end positions of the control valve valve OPEN or CLOSED depending on the oper ating direction and the mounting position ac...

Страница 43: ...v er faces downward when the valve is installed Table 8 Direct attachment to Type 3277 Actuator Fig 3 Left attachment Right attachment Switch Valve position Tag outside inductive field Tag inside indu...

Страница 44: ...et the span i e the upper range value and the SPAN potentiometer for fine tuning The ad justed value is always based on a 20 mA signal Example Move the valve to the open position while observing the p...

Страница 45: ...ntiometer 4 Set the zero point to exactly 4 mA using the ZERO potentiometer Adjusting the span 1 Use the input signal of the positioner to move the valve to closed position valve CLOSED travel 100 2 T...

Страница 46: ...at the sensor of the position transmitter reaches the control range Unscrew the clamp For actuator stem extends FA shift the pointer upward to wards the actuator for actuator stem retracts FE shift th...

Страница 47: ...he i p module 2 Unscrew the fastening screws and re move the i p module 6 including the seals 7 8 3 Place the connecting plate 3 with the seal on the housing bores and screw tight The restriction must...

Страница 48: ...41 42 and 51 52 in the terminal base 4 Guide the connecting cable to the termi nals and fasten brown blue 5 Refasten the bracket with plate 1 and stick the adhesive label for the limit switches on th...

Страница 49: ...sion protection is based needs to be serviced the device must not be put back into operation until a qualified inspector has assessed it ac cording to explosion protection require ments has issued an...

Страница 50: ...185 76 110 82 56 66 50 M20 x 1 5 28 5 28 5 Output 1 A1 Output 2 A2 Supply Z 50 Output 38 Supply 9 Pneumatic connections G or NPT Reversing amplifier optional Attachment with intermediate piece for ro...

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Страница 68: ...SAMSON AG MESS UND REGELTECHNIK Weism llerstra e 3 60314 Frankfurt am Main Germany Phone 49 69 4009 0 Fax 49 69 4009 1507 samson samson de www samson de EB 8355 2 EN 2017 06 29 English...

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