RC 195 Receiver-Controller

Transcription

1 Document No R 95 Receiver-ontroller Product Description The Powers R 95 Receiver-ontroller is a pneumatic instrument that receives one, two or three pneumatic inputs. t produces a pneumatic control signal based on the net pneumatic input and the mechanical settings, such as set point, percent proportional band and authority. Product Numbers Product Number Table. ontrol (Output) Pressure Gauge tick-on cale Dispenser For et Point Dial None English/tandard nternational Units to 0 psig/ 0 to 00 kpa English/tandard nternational Units Troubleshooting efore troubleshooting the operation of the R 95 Receiver-ontroller, ensure that:. The supply pressure at the unit is psi 5 kpa).. All transmitter inputs being used are between to 5 psi ( to 0 kpa).. Only one restrictor supplies each transmitter. 4. The transmitter calibration is correct. Accessories Restriction Repair Kit, includes Four restriction plates and gaskets onnector Kit, includes Two connectors, one -barb and One -barb (for /4 O.D. plastic tubing) R 95 nput Pressure imulators One gauge/switch assembly Two gauge/switch assemblies Three gauge/switch assemblies Terminal trip (for ten /4 O.D. plastic tubes) cale onversion ard (Pkg. of 5) 44-0 et Point Dial heets 95-0 (ee 55-06P5 or the Powers ontrols atalog for scale ranges.) Receiver Gauges a variety of -/ inch (8mm), -/ inch (64mm) and -/ inch (89mm) diameter receiver gauges are available to monitor transmitter input signals. Request GA 4- Receiver Gauges (55-0P5) from your nearest iemens uilding Technologies office. R alibration lide Rule Table. Troubleshooting hecklist. omplaint heck Probable ause orrective Action ontrol pressure stays at approximately zero ontrol pressure stays at approximately supply pressure Rotate set point adjustment screw counterclockwise Rotate set point adjustment screw clockwise Pressure increases Pressure remains unchanged Pressure decreases Pressure remains unchanged Transmitter sensing medium which is above (R.A.) or below (D.A.) the proportional band R 95 out of calibration None Recalibrate Replace Pilot Relay Plugged pilot relay restrictors Restrictors Receiver-ontroller is defective Replace Receiver ontroller Transmitter sensing medium which is above (D.A.) or below (R.A.) the None proportional band R 95 out of calibration Recalibrate Receiver-ontroller is defective Replace Receiver-ontroller Page of 5

2 Document No nstallation General. The R 95 Receiver-ontroller may be mounted in any position on any vertical surface. Two integral mounting tabs accept a No. 8 or No. 0 screw. mall vibrations, such as those from an air handling unit, will not affect the operation of the instrument. over removal The cover furnished with the R 95 is self-locking to the instrument body. To remove the cover, pull cover to the right and lift then pull cover to the left and lift. To put the cover back on, put it in place and press down until it latches.. Generally, /4-inch (6.4mm) O.D. plastic tubing should be used for all the connections to the plug-in air connectors. Larger size tubing will reduce the pressure drops, but they will increase time delays. onversely, smaller tubing will reduce time delays, but will increase pressure drops.. The R 95 requires a clean, dry, oil free supply of compressed air. t is recommended that an AF 908 n-line Air Filter be located in the supply line to the R 95. A maximum of two R 95 Receiver-ontrollers can be supplied by a single AF 908 n-line Air Filter. 4. Whenever possible, the R 95 equipment should be used with a constant air supply. The R 95 Receiver-ontroller and transmitter are calibrated at the factory with a psig air supply. f a constant air supply is not available, use a remote restrictor and separate air supply to transmitters. hanging the supply pressure to the R 95 Receiver-ontroller system from psig to either 8 or 5 psig can shift the control point by as much as % of scale. Once the instrument is secured and proper tubing connections are made, the cover can be removed for access to internal restrictors, percent authority adjustment, percent proportional band adjustment, the set point dial and the set point dial adjustment. Restrictors Figure.. Restrictors are factory installed in all inputs of the Receiver-ontroller. Restrictors are in the "out" position as shipped from the factory. NOTE: When an internal restrictor is required, the restrictor must be moved to the "N" position. Use the following procedure when dialing to a new restrictor position: a. Loosen both screws two full turns. b. ove the restrictor lever back and forth, between the full travel limits, a minimum of two times or until there is no sensation of "drag" against the lever. This will allow the gasket to return to its proper position. c. Retighten both screws with the restrictor lever fully in position against its stop. Do not over-tighten the screws. crews should be tight enough to provide a good seal without warping the restrictor assembly. d. ee Accessories for Replacement Restrictor Kit part number.. When an input is not being used, the restrictor should be in the "OUT" position and the input connection should be open to atmosphere. Page of 5 Figure. Dimensions. iemens uilding Technologies, nc.

3 Document No nstallation, ontinued Figure gives the maximum recommended distances for using the internal restrictor, external restrictor and remote gauges. f the maximum distances are exceeded, there will be excessive pressure drops and time delays which will produce faulty indication and unsatisfactory operation. et point adjustment The output pressure at set point can be adjusted by simply rotating the set point adjustment screw until the desired pressure is reached. The set point dial has a to 5 psi ( to 0 kpa) scale. One of the stick-on scales provided with the unit may be placed on the dial to match the # or # input transmitter range. Each scale is marked D.A. (Direct Acting) or R.A. (Reverse Acting) to match the required action of the receiver-controller. To determine the authority setting, the proportional band setting, and set point setting, refer to the control diagram (or the setting on the instrument being replaced). Technical nstruction R 95- and Application Engineering Form AE 9 gives detailed information on how to calculate the percent proportional band setting, the percent authority setting, and set point conditions. alibration Figure. Proportional band (sensitivity) The proportional band setting is adjustable from to 0% of the primary input scale based on a control pressure change of 5 psi. The proportional band setting selected depends on the characteristics of the system under control; this setting is normally a value which will result in satisfactory control without short cycling (too low percent P) or hunting (too high percent P). Authority adjustment The authority slide provides a means of adjusting the ratio of the change of the # (or #) input pressure to the change of the # input pressure for the same control pressure change. nput connections # and # have fixed authorities with respect to each other equal to 00%. nput connection # has an adjustable authority with respect to inputs # and # which, by means of authority slide, may be varied from 0 to 00%. The authority adjustment is required only when input # is used. Receiver-ontroller imulator A tool designed to simplify the calibration and set-up of the R 95 receiver-controller is available. The R 95 simulators (Product Numbers , and 95-00) can simulate one, two or three transmitters (one-pipe) and indicate their corresponding simulated pressures. Procedure. et the proportional band pointer to value shown on control diagram.. et the authority pointer to value shown on control diagram. R0088R AUTHORTY ADJUTENT ET PONT PERENT PROPORTONAL AND Figure 4. R- ontrol Diagram.. onnect psi supply air to port "". 4. onnect pressure gauge to port "". iemens uilding Technologies, nc. Page of 5

4 D D Document No nstallation, ontinued 5. Apply set point pressures to inputs and, with a screwdriver, turn the set point adjustment screw until control pressure reaches 8 psi (55 kpa) or midpoint pressure between spring range of actuator. 6. alibrate set point dial by pulling it up, turning it to agree with the transmitter input and then releasing it. 7. Turn set point adjustment screw until dial agrees with control diagram. 8. For two input applications, set point conditions are equal to the midpoints of the reset schedule. R0090R A DPONT A References R 95- Operation and adjustment information 55-06P5 AE-9 Application information AE-9 upl Application information GA 4- Receiver Gauges 55-0P5 R 95- R 95 imulators 55-0P5 Figure For manual control point adjustment (PA), connect gradual switch to input or, set switch to 9 psi (6 kpa), and then calibrate controller as in teps 5 through 8 above. alibrating in this manner will allow equal increase or decrease in control point when the bleed type positioning switch is used. 0. Once the sensor-controller system is completely installed and sensor(s) have been calibrated, some tuning of the control loop may be required. f output continuously cycles, increase percent proportional band. f hunting (large offset) is present, decrease percent proportional band. NOTE: Whenever the proportional band or authority settings are changed, the set point dial must be recalibrated. The installation is now complete. Page 4 of 5 iemens uilding Technologies, nc.

5 Document No Receiver-ontroller ross Reference REEVER-ONTROLLER RO REFERENE DRET ATON - NGLE REVERE ATON - NGLE POWER ONTROL DRET ATON - REERVE REET DUAL (ONE REETTNG) DRET ATON - REERVE REET THREE (TWO REETTNG) DENOTE NTERNAL RETRTOR UED DENOTE NTERNAL RETRTOR "OUT" PRARY EONDARY (REETTNG) EONDARY (REETTNG) PRARY FRT REETTNG R - 95 R - 95 HONEYWELL R - 95 R - 95 PRARY EONDARY (REETTNG) PRARY FRT REETTNG RP - 908A (D.A. ODEL) RP - 908A (R.A. ODEL) RP DENOTE ONNETON HA AN EXTERNAL RETRTOR RP EOND REETTNG JOHNON T-900 & T-9005 DRET OR REVERE ATON (ATON DETERNED Y PROGRA ODULE POTON) DENOTE ONNETON HA AN EXTERNAL RETRTOR DENOTE NTERNAL RETRTOR UED DENOTE LOAL ETPONT DENOTE REOTE ETPONT (PA) T-900 ATON DA-DARR RADR DADR RA-RARR PROGRA ODULE DENTFATON T-900 ATON & READJUTENT EONDARY (REETTNG) FRT REETTNG PRARY PRARY EOND T-900 & T-9006 REETTNG T-900 & T-9006 ROERTHAW PRARY EONDARY (REETTNG) EOND REETTNG PRARY FRT REETTNG P4 P4 P4 P4 ARER-OLAN RK TRAN RK TRAN RK - 00 EONDARY (REETTNG) PRARY DENOTE ONNETON HA EXTERNAL RETRTOR RK FRT REETTNG A PRARY EONDARY REETTNG DONTNUED LAND AND GYR POWER R0089R R -85 DENOTE NTERNAL RETRTOR UED R -85 DENOTE ONNETON HA AN EXTERNAL RETRTOR EONDARY (REETTNG) R -85 PRARY R -85 FRT REETTNG PRARY EONDARY REETTNG nformation in this publication is based on current specifications. The company reserves the right to make changes in specifications and models as design improvements are introduced. Powers is a trademark of iemens uilding Technologies, nc. 000 iemens uilding Technologies, nc. iemens uilding Technologies, nc. Landis & taefa Division 000 Deerfield Parkway uffalo Grove, L U..A. Your feedback is important to us. f you have comments about this document, please send them to technical.editor@sbt.siemens.com Document No Printed in the U..A. Page 5 of 5