Samson 3766 - Default Chapter; Table of Contents

Contents
EB 8355-1 EN 3
1 General safety instructions ............................................................................. 5
2 Design and principle of operation ..................................................................6
2.1 Versions and article code ................................................................................9
2.2 Technical data .............................................................................................10
2.3 Additional equipment ................................................................................... 12
2.4 Summary of explosion protection approvals ...................................................13
3 Mounting on control valves ..........................................................................14
3.1 DirectattachmenttoType3277Actuator .......................................................14
3.2 AttachmentaccordingtoIEC60534-6 ........................................................... 21
3.2.1 Mounting sequence ......................................................................................22
3.2.2 Initial adjustment of travel .............................................................................22
3.3 Attachment to rotary actuators ......................................................................25
3.3.1 Mounting the lever with feeler roll ..................................................................26
3.3.2 Mounting the intermediate piece ...................................................................26
3.3.3 Basic setting of the cam disk .........................................................................28
3.3.4 Reversingamplierfordouble-actingactuators ..............................................32
4 Connections ................................................................................................34
4.1 Pneumatic connections..................................................................................34
4.1.1 Pressure gauges ...........................................................................................34
4.1.2 Supply pressure ...........................................................................................34
4.2 Electrical connections ...................................................................................36
4.2.1 Switchingamplier ......................................................................................37
5 Operation ...................................................................................................38
5.1 Tuningthepositionermountedontothecontrolvalve ....................................... 38
5.1.1 AdjustingtheproportionalbandXpandairdeliveryQ ..................................39
5.1.2 Settingsforactuatorwith“actuatorstemextends”fail-safeaction ..................... 39
5.1.3 Settingsforactuatorwith“actuatorstemretracts”fail-safeaction .....................40
5.2 Changingtheoperatingdirection ..................................................................41
5.3 Adjustingthelimitcontacts ...........................................................................42
5.4 Adjustingthepositiontransmitter...................................................................44
6 Upgrading the positioner .............................................................................47