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Instruction Manual

D103292X012

C1 Controllers and Transmitters

March 2017

27

Principle of Operation

The following sections describe the operation of a controller or transmitter using a Bourdon tube sensing element. The
operation is the same for an instrument using a bellows sensing element (key 71, figure 25) except that movement of
the beam is caused by expansion or contraction of the bellows or differential bellows.

Proportional-Only Controllers

As shown in figure 13, supply pressure enters the relay and bleeds through the fixed orifice before escaping through
the nozzle. Nozzle pressure also registers on the large relay diaphragm, and loading pressure (controller output
pressure) registers on the small relay diaphragm.

Figure 13. Schematic of Reverse-Acting Proportional-Only and Proportional-Plus-Reset Controllers

CONSTANT SUPPLY
PRESSURE

EXHAUST

EXHAUST END OF RELAY

BOURDON TUBE

FIXED
PIVOT

BEAM AND
FLAPPER

NOZZLE

VENT

INLET END OF RELAY VALVE

SMALL DIAPHRAGM

LARGE DIAPHRAGM

TO FINAL
CONTROL
ELEMENT

SENSED
PRESSURE

RESTRICTION

PROPORTIONAL-ONLY

CONTROLLER

GE23696
GE34724-A
E1062

PROPORTIONAL
BELLOWS

RESET BELLOWS

SENSED PRESSURE OUTPUT PRESSURE NOZZLE PRESSURE RESET PRESSURE

CANTILEVER SPRING

RESET
VALVE

RESET BELLOWS

PRESSURE SETTING DIAL

PRESSURE SETTING KNOB

PROPORTIONAL
BELLOWS

PROPORTIONAL
BAND ADJUSTMENT
KNOB

PROPORTIONAL-PLUS-RESET

CONTROLLER

A change in the process pressure moves the beam and flapper with respect to the nozzle by either expanding or
contracting the Bourdon tube arc. An increasing process pressure with direct action (or decreasing pressure with
reverse action) produces a nozzle-flapper restriction that increases the loading on the large relay diaphragm and opens
the relay valve. Additional supply pressure flows through the relay chamber to increase the loading pressure on the
control valve actuator. A decreasing process pressure with direct action (or increasing pressure with reverse action)
produces a nozzle-flapper opening that bleeds off pressure on the large relay diaphragm and opens the relay valve to
exhaust controller output pressure from the actuator.

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Содержание Fisher C1

Страница 1: ...l Plus Reset Controllers 20 Differential Gap Controllers 20 Adjustments 21 Adjustment Set Point 21 Adjustment Proportional Band 21 Calibration Differential Gap Controllers 21 Startup Differential Gap Controllers 23 Transmitter Operation 23 Adjustments 23 Adjustment Zero 23 Adjustment Span 24 Figure 1 Fisher C1 Controller Yoke Mounted on Control Valve Actuator W9263 1 Calibration Transmitters 24 St...

Страница 2: ... cautions and warnings If you have any questions about these instructions contact your Emerson Automation Solutions sales office before proceeding Description The C1 pneumatic pressure controllers and transmitters use a bellows or Bourdon tube sensing element to sense the gauge pressure vacuum compound pressure or differential pressure of a liquid or gas The controller or transmitter output is a p...

Страница 3: ... 08 normal m3 hour 3 scfh 0 4 to 2 0 bar 6 to 30 psig 0 12 normal m3 hour 4 5 scfh Supply and Output Connections 1 4 NPT internal Common Signal Pressure Conversions See table 6 Proportional Band Adjustment For Proportional Only Controllers Full output pressure change adjustable from J 2 to 100 of the sensing element range for 0 2 to 1 0 bar 3 to 15 psig or J 4 to 100 of the sensing element range f...

Страница 4: ...ardous Area Classification Complies with the requirements of ATEX Group II Category 2 Gas and Dust Refer to figure 26 for location of ATEX marking Approximate Weight 8 2 kg 18 pounds Declaration of SEP Fisher Controls International LLC declares this product to be in compliance with Article 4 paragraph 3 PED Directive 2014 68 EU It was designed and manufactured in accordance with Sound Engineering ...

Страница 5: ... to 340 mbar 0 to 10 inch Hg 0 to 1 0 bar 0 to 30 inch Hg 1 4 2 8 2 8 20 40 40 6 9 100 Compound Pressure 75 mbar vac to 75 mbar 30 inch wc vac to 30 inch wc 500 mbar vac to 500 mbar 15 inch Hg vac to 7 5 psig 1 0 bar vac to 1 0 bar 30 inch Hg vac to 15 psig 1 4 2 8 2 8 20 40 40 6 9 6 9 100 100 Positive pressure 0 to 150 mbar 0 to 60 inch wc 0 to 250 mbar 3 0 to 100 inch wc 0 to 350 mbar 4 0 to 140...

Страница 6: ...lt from fire or explosion if natural gas is used as the supply medium and appropriate preventive measures are not taken Preventive measures may include but are not limited to one or more of the following remote venting of the unit re evaluating the hazardous area classification ensuring adequate ventilation and the removal of any ignition sources For information on remote venting of this controlle...

Страница 7: ...ts Pipestand Mounting Refer to figure 2 Use a hammer and punch to knock out the blanks in the two holes indicated in the back view of figure 2 Attach the spacer spools key 228 and the mounting plate key 213 to the controller with cap screws lock washers and nuts keys 215 221 and 216 Attach the controller to a 2 inch nominal pipe with pipe clamps key 250 Actuator Mounting Refer to figure 3 Controll...

Страница 8: ...TING MOUNTING HOLES PANEL MOUNTING WALL MOUNTING BACK VIEW PIPESTAND MOUNTING mm INCH NOTES 1 ALL CONNECTIONS ARE 1 4 NPT INTERNAL HIGH PRESSURE CONNECTION FOR DIFFERENTIAL PRESSURE UNITS 2 3 LOW PRESSURE CONNECTION FOR DIFFERENTIAL PRESSURE UNITS E1052 101 6 4 00 14 3 0 56 R 244 3 9 62 215 9 8 50 218 9 8 62 142 7 5 62 69 1 2 72 23 1 0 91 65 8 2 59 63 5 2 50 63 5 2 50 180 8 7 12 8 7 11 32 KNOCK OU...

Страница 9: ...e obstructed by detached sealing tape Thread sealant paste should be used to seal and lubricate pneumatic threaded connections All pressure connections on C1 instruments are 1 4 NPT internal Use 6 mm 1 4 inch or 10 mm 3 8 inch pipe or tubing for supply and output piping The pressure connection locations are shown in figure 2 Supply Pressure WARNING Severe personal injury or property damage may occ...

Страница 10: ...ollers use either a Bourdon tube or bellows as the sensing element as indicated in table 2 Differential pressure controllers use two bellows to sense differential pressure For gauge pressure instruments The control pressure block key 10 in figure 22 has two connections Process pressure can be connected either to the CONTROL connection on the back of the case or to the connection on the left side o...

Страница 11: ... if one is required Check the vent periodically to be certain it has not become plugged Controller Operation Proportional Only Controllers This section describes the adjustments and procedures for calibration and startup Adjustment locations are shown in figure 4 unless otherwise specified All adjustments must be made with the cover open When the adjustments and calibration procedures are complete...

Страница 12: ...a pressure source to the supply pressure regulator and be sure the regulator is delivering the correct supply pressure to the controller The controller must be connected open loop Open loop The controller output pressure changes must be dead ended into a pressure gauge The following procedures use a 0 2 to 1 0 bar 3 to 15 psig output pressure range as an example For a 0 4 to 2 0 bar 6 to 30 psig o...

Страница 13: ...ases the span is increasing Proper controller response depends on nozzle to flapper alignment When performing span adjustments carefully loosen both calibration adjuster screws while holding the calibration adjuster in place Then move the calibration adjuster slightly in the required direction by hand or using a screwdriver Verify proper nozzle to flapper alignment and hold the calibration adjuste...

Страница 14: ...eases the span is increasing Proper controller response depends on nozzle to flapper alignment When performing span adjustments carefully loosen both calibration adjuster screws while holding the calibration adjuster in place Then move the calibration adjuster slightly in the required direction by hand or using a screwdriver Verify proper nozzle to flapper alignment and hold the calibration adjust...

Страница 15: ... disturb the system again Continue this procedure until the system cycles At that point double the proportional band setting Note Proportional band adjustment affects the set point Proportional only controllers will show some offset from set point depending upon proportional band setting and process demand After adjusting the proportional band re zero by carefully rotating the nozzle key 54 until ...

Страница 16: ... Adjustment Proportional Band To adjust the proportional band rotate the proportional band adjustment knob to the desired value The proportional band adjustment determines the amount of change in controlled pressure required to cause the control valve to stroke fully It may be adjusted from 3 to 100 percent for 0 2 to 1 0 bar 3 to 15 psig or 6 to 100 percent for 0 4 to 2 0 bar 6 to 30 psig of the ...

Страница 17: ...et windup record the direction of the arrow on the anti reset windup assembly key 190 in figure 23 Remove the assembly and install the two O rings key 81 and cover key 80 supplied with the controller Secure the cover with the two machine screws key 82 provided 2 Connect regulated supply pressure to the controller Do not exceed the normal operating pressure in table 5 3 Rotate the reset knob to 0 0...

Страница 18: ...t windup remove the two machine screws anti reset windup cover and two O rings installed in step 1 of this procedure Install the anti reset windup assembly key 190 with the arrow pointing in the direction recorded in step 1 14 Proceed to the Startup procedures for proportional plus reset controllers Figure 8 Reverse Acting Controller Span Adjustment Proportional Plus Reset Controllers IF OUTPUT IS...

Страница 19: ...n step 1 of this procedure Install the anti reset windup assembly key 190 with the arrow pointing in the direction recorded in step 1 14 Proceed to the Startup procedures for proportional plus reset controllers Figure 9 Direct Acting Controller Span Adjustment Proportional Plus Reset Controllers IF OUTPUT IS BELOW 8 TO 10 PSIG 0 6 TO 0 7 BAR ABOVE 8 TO 10 PSIG 0 6 TO 0 7 BAR MOVE ADJUSTER LEFT MOV...

Страница 20: ...until the system cycles At that point double the proportional band setting and begin tuning the reset 6 Reset Action Disturb the system If the system does not cycle then speed up the reset and disturb the system again Continue this procedure until the system cycles When the system cycles multiply the reset time setting by a factor of three 3 and slow the reset down to the new value The reset is no...

Страница 21: ...hip between the proportional band dial setting and the differential gap is shown in figure 10 Figure 10 Differential Gap Adjustment for Differential Gap Controllers A2202 3 PROPORTIONAL BAND KNOB SETTING DIFFERENTIAL GAP PERCENT OF ELEMENT RANGE Calibration Differential Gap Controllers The output of each controller is checked at the factory before the unit is shipped Before placing the controller ...

Страница 22: ...t bellows and the repositioning of the cantilever spring Performing step 6b below adjusts for this offset 5 Refer to figure 10 to determine the proportional band dial setting required for the desired differential gap For example assume that a 0 to 100 psig sensing element is being used and the controller is to switch from zero to full supply pressure at a process pressure of 80 psig with rising pr...

Страница 23: ... differential gap controllers procedure Transmitter Operation This section describes the adjustments and procedures for calibration and startup Refer to figure 11 for the adjustment locations All adjustments must be made with the cover open When the adjustments and calibration procedures are complete close and latch the cover To better understand the adjustments and overall operation of the transm...

Страница 24: ... as the controller proportional band adjustment Calibration Transmitters The output of each transmitter is checked at the factory before the unit is shipped The transmitter provides an output signal that is proportional to the pressure applied to the sensing element The output pressure has no direct effect on the process pressure The transmitter is calibrated at the factory and should not need add...

Страница 25: ...in the calibration adjuster key 36 slots Depending upon the transmitter action perform one or the other of the following procedures For reverse acting transmitters 4 Rotate the zero adjustment knob to zero 5 Apply an input pressure equal to the sensing element upper range limit 6 Adjust the nozzle key 57 until the transmitter output pressure is at 0 2 bar 3 psig 7 Set the input pressure equal to z...

Страница 26: ...juster screws while holding the calibration adjuster in place Then move the calibration adjuster slightly in the required direction by hand or using a screwdriver Verify proper nozzle to flapper alignment and hold the calibration adjuster in place while tightening both adjustment screws 8 If the output pressure is not 15 psig adjust the span by loosening the two adjusting screws key 48 and moving ...

Страница 27: ...MALL DIAPHRAGM LARGE DIAPHRAGM TO FINAL CONTROL ELEMENT SENSED PRESSURE RESTRICTION PROPORTIONAL ONLY CONTROLLER GE23696 GE34724 A E1062 PROPORTIONAL BELLOWS RESET BELLOWS SENSED PRESSURE OUTPUT PRESSURE NOZZLE PRESSURE RESET PRESSURE CANTILEVER SPRING RESET VALVE RESET BELLOWS PRESSURE SETTING DIAL PRESSURE SETTING KNOB PROPORTIONAL BELLOWS PROPORTIONAL BAND ADJUSTMENT KNOB PROPORTIONAL PLUS RESE...

Страница 28: ... ramps the controller output to either zero or full supply pressure this condition is reset windup When the controlled variable crosses the set point there will be a delay before the controller output responds to the change in controlled variable Anti reset windup minimizes this delay and permits returning the controlled variable to set point more quickly with minimal overshoot As shown in figure ...

Страница 29: ...T BELLOWS RESTRICTION RESET VALVE GE23697 A GE34724 A E1063 SENSED PRESSURE PROPORTIONAL BELLOWS SENSED PRESSURE OUTPUT PRESSURE NOZZLE PRESSURE RESET PRESSURE DIFFERENTIAL RELIEF VALVE CANTILEVER SPRING PRESSURE SETTING DIAL PROPORTIONAL BAND ADJUSTMENT KNOB PRESSURE SETTING KNOB OUTPUT AT ZERO DURING SHUTDOWN OUTPUT AT SUPPLY DURING SHUTDOWN Transmitters Action of a pneumatic transmitter is simi...

Страница 30: ...ken Preventative measures may include but are not limited to one or more of the following Remote venting of the unit re evaluating the hazardous area classification ensuring adequate ventilation and the removal of any ignition sources For information on remote venting of this controller transmitter refer to page 11 D Check with your process or safety engineer for any additional measures that must ...

Страница 31: ...screw key 56 are at times furnished for insertion at the beam key 39 connection to ensure alignment of the connecting link key 16 3 Disconnect the control tubing key 23 figure 23 Unscrew the two screws key 55 and washers key 45 and remove the Bourdon tube key 5 4 Unscrew the machine screw key 56 and remove the link and bearing keys 16 and 31 from the Bourdon tube Be careful to avoid losing the bea...

Страница 32: ...mit access to the link screw 5 Disconnect the link key 71M and bearing key 71L from the beam Be careful to avoid losing the bearing 6 Loosen the nuts that secure the bellows assembly key 71 and remove this assembly from the bellows yoke key 100 7 For a gauge pressure sensing element only one bellows in the assembly install the proper bellows spring key 104 into the bellows assembly if the input si...

Страница 33: ...d in step 1 when the process is shut down Changing Action Proportional Only to a Differential Gap Controller A proportional only controller may be changed to a differential gap controller or vice versa by changing the position of the proportional tubing and inverting the proportional band assembly 1 Isolate the controller or transmitter from process control and supply pressure Vent any trapped pre...

Страница 34: ... be turned to the 10 setting loosen the spring adjustor key 63 5 Check all connections for leaks with a soap and water solution Perform the appropriate calibration procedure Figure 17 Proportional Band Assembly PROPORTIONAL BAND ADJUSTMENT KNOB KEY 73 LOCK SPRING KEY 72 CANTILEVER SPRING KEY 8 BIAS SPRING KEY 70 WASHER KEY 64 SPRING ADJUSTOR KEY 65 GE34725 B SPRING SPACER KEY 245 MACHINE SCREW KEY...

Страница 35: ...R PROPORTIONAL TUBING KEY 25 BELLOWS KEY 52 BELLOWS KEY 52 REVERSING BLOCK KEY 37 NOZZLE KEY 54 TO CHANGE ACTION OF THE CONTROLLER REPOSITION THE PROPORTIONAL TUBING REVERSING BLOCK NOZZLE AND PROPORTIONAL BAND ASSY AS SHOWN ABOVE RELAY TUBING KEY 24 RELAY TUBING KEY 24 BELLOWS KEY 52 DIRECT ACTING POSITION REVERSING ACTING POSITION BELLOWS KEY 52 FLAPPER SCREW KEYS 40 AND 46 FLAPPER SCREW KEYS 40...

Страница 36: ...n the reversing block assembly and the calibration adjuster key 36 Replace these O rings if necessary c Position the reversing block assembly with an O ring on the calibration adjuster key 36 so that the nozzle is on the opposite side of the beam key 39 from which it was removed Position the reversing block hole in the calibration adjuster Install the reversing block screw key 50 with an O ring ke...

Страница 37: ... KEY 65 WASHER KEY 64 WASHER KEY 64 BIAS SPRING KEY 70 BIAS SPRING KEY 70 Figure 19 Changing From a 0 2 to 1 0 bar 3 to 15 psig to a 0 4 to 2 0 bar 6 to 30 psig Output Signal Range or Vice Versa NOTE REVERSE THE SPRING SPACER AS APPROPRIATE TO CHANGE THE BIAS SPRING WORKING LENGTH GG15991 A 1 1 1 Also make appropriate changes to the nameplate of the controller or transmitter reflecting the new ran...

Страница 38: ...r key 34 a Remove the beam machine screws figure 21 step m b Remove the cantilever machine screws figure 21 step l c Remove the inner flexure figure 21 step j and install it on the new cantilever 10 Install the new cantilever spring key 8 and reconnect the beam key 39 to the bellows spacer key 34 in reverse sequence of steps 9a and 9b and reattach the bellows to the beam cantilever assembly 11 Com...

Страница 39: ... install new gauges with correct ranges 16 Replace the subassembly in the case and secure with machine screws figure 22 or 23 key 41 Re install the Bourdon tube if it was removed refer to the Replacing the Bourdon Tube section Reconnect all tubing 17 Check all tubing connections and the bellows machine screws for leaks tighten as necessary Perform the appropriate calibration procedures Figure 21 B...

Страница 40: ...ial number can be found on the nameplate key 22 figure 22 WARNING Use only genuine Fisher replacement parts Components that are not supplied by Emerson Automation Solutions should not under any circumstances be used in any Fisher instrument Use of components not supplied by Emerson Automation Solutions may void your warranty might adversely affect the performance of the instrument and could cause ...

Страница 41: ...used for the output gauge A quantity of 1 is required for these units Use key 3 for supply pressure indication when a process pressure gauge is installed Key 3 installs on the supply pressure regulator 2 Supply and Output Pressure Gauge w o process pressure gauge 1 8 inch connecting stem 2 req d Dual scale Brass Plastic 0 2 0 kg cm2 and 0 30 psig 0 4 0 kg cm2 and 0 60 psig SST 0 2 0 kg cm2 and 0 3...

Страница 42: ... aluminum 7 Screw nylon transmitters only 8 Cantilever Spring S30200 3 15 psi range 6 30 psi range 9 Nameplate aluminum 10 Control Pressure Block For gauge pressure instruments w o process pressure gauge CF8M FMS 20B58 for standard NACE and oxygen service w process gauge SST Key Description 11 Plug S31600 not shown used with gauge pressure only 1 req d for standard NACE 2 req d for oxygen service ...

Страница 43: ...Std 18 8 SST 16 Connecting Link Bourdon tube w optional travel stop 18 8 SST 17 Lockwasher steel pl 2 req d Use w optional Bourdon tube travel stop 18 Machine Screw steel pl 2 req d Use w optional Bourdon tube travel stop 19 Relay Gasket 1 Std Temp chloroprene Hi Temp silicone Key Description 20 O Ring 1 nitrile 21 Gasket 1 chloroprene not shown 22 Mounting Screw for reset restriction valve 1 4 20...

Страница 44: ...ts only 2 req d 32 Rotary Spring S30400 33 Bellows Stud brass not shown 34 Spacer 35 Pressure Set Arm G10080 carbon steel zinc pl 36 Calibration Adjuster 37 Reversing Block 1 Z33520 zinc die casting 38 Sleeve 1 POM polyoxymethylene Key Description 39 Beam G10080 carbon steel zinc pl 40 Flapper 1 S30100 SST 41 Machine Screw steel pl 4 req d 42 Flexure Strip S30200 43 Flexure Strip Washer G10200 car...

Страница 45: ... 67 Inner Flexure S30200 68 Outer Flexure S30200 69 Indicator Scale aluminum 70 Bias Spring SST Key Description 71 Gauge Pressure Bellows input 3 Brass 0 150 mbar 0 60 inches wc positive 0 150 mbar 6 60 inches wc vacuum and 75 0 75 mbar 30 0 30 inches wc compound 0 250 mbar 0 100 inches wc positive 0 0 35 mbar 0 5 psig positive and for 0 350 mbar 0 10 inches Hg vacuum 0 0 5 bar 0 7 5 psig positive...

Страница 46: ...ainless steel 0 2 0 bar 0 30 psi 71K Machine Screw 4 steel pl bellows sensing instruments only 2 req d 71L Bearing 4 bellows sensing instruments only 2 req d 71M Link 4 bellows sensing instruments only Key Description 72 Lock Spring 304L SST 73 Proportional Band Adjustment Knob steel PPS 74 Machine Screw 1 18 8 SST 2 req d 75 Gasket 1 Std Temp chloroprene 2 req d High Temp silicone 2 req d 76 Nozz...

Страница 47: ...1K LINK KEY 71M SCREW KEY 71K BEARING KEY 71L LINK KEY 71M BEARING KEY 71L SECTION A A A A SIDE VIEW OF SUBASSEMBLY WITH GAUGE PRESSURE BELLOWS SENSING ELEMENT SIDE VIEW OF SUBASSEMBLY WITH DIFFERENTIAL PRESSURE BELLOWS SENSING ELEMENT NOTES KEYS 33 46 AND 74 ARE NOT SHOWN KEY 52 IS FEEDBACK BELLOWS KEYS 71K 71L 71M ARE PART OF THE BELLOWS ASSEMBLY KEY 71 1 1 1 1 1 B B SECTION B B 1 1 GE35161 A GE...

Страница 48: ...Windup Cover not shown 81 O Ring not shown 2 req d 82 Machine screw not shown 2 req d Key Description 98 Machine Screw steel pl 4 req d Gauge and differential pressure bellow instruments 99 Washer steel pl for Bourdon tube instruments 2 req d for bellows sensing instruments 4 req d 100 Bellows Yoke zinc use with gauge and differential pressure bellows Note Keys 101 through 105 are used for gauge p...

Страница 49: ...ollers and Transmitters March 2017 49 Figure 26 Front View of Case and Cover Assembly SECTION B B SECTION A A COMPRESSION PLUGS ATEX MARKING CASE ASSEMBLY COVER ASSEMBLY 2X ROLL PIN A A B B CHANGE ACTION LABEL INSIDE COVER GE28278 B E1075 1 ...

Страница 50: ...inches 223 Cap Screw steel pl 1051 and 1052 with either case or yoke mounted regulator and 1061 with yoke mounted regulator 2 req d 228 Spacer Spool steel specify quantity req d 470 472 480 513 656 657 667 pipe stand 1051 1052 and 1061 Key Description 229 Cap Screw steel pl not shown specify quantity req d 1051 and 1052 casing mounted controller 238 Mounting Plate steel For yoke mounted filter reg...

Страница 51: ...Instruction Manual D103292X012 C1 Controllers and Transmitters March 2017 51 ...

Страница 52: ...nditions which are available upon request We reserve the right to modify or improve the designs or specifications of such products at any time without notice E 2008 2017 Fisher Controls International LLC All rights reserved Fisher is a mark owned by one of the companies in the Emerson Automation Solutions business unit of Emerson Electric Co Emerson Automation Solutions Emerson and the Emerson log...

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