TSI Instruments SUREFLOW 8670 Operation And Service Manual
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TSI Instruments SUREFLOW 8670 Operation And Service Manual

TSI Instruments SUREFLOW 8670 Operation And Service Manual

Room pressure controller
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Model 8670
S
F
TM
URE
LOW
Room
Pressure
Controller
Operation and Service
Manual
September 1994
P/N 1980148 Rev. C

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Summary of Contents for TSI Instruments SUREFLOW 8670

  • Page 1 Model 8670 Room Pressure Controller Operation and Service Manual September 1994 P/N 1980148 Rev. C...
  • Page 3 Model 8670 Room Pressure Controller Operation and Service Manual September 1994 P/N 1980148 Rev. C U.S. AND CANADA OTHER COUNTRIES Sales & Customer Service: Sales & Customer Service: (800) 777-8356/(651) 490-2711 (001 651) 490-2711 Fax: Fax: (651) 490-2874 (001 651) 490-2874 SHIP TO: MAIL TO: TSI Incorporated...
  • Page 4 Copyright - TSI Incorporated/September 1994/All rights reserved. Part number 1980148 Rev. C LIMITATION OF WARRANTY AND LIABILITY Seller warrants that this product, under normal use and service as described in the operator's manual, shall be free from defects in workmanship and material for a period of twenty-four (24) months, or the length of time specified in operator's manual, from the date of shipment to the customer.

  • Page 5: Table Of Contents

    CONTENTS Page Number PART ONE Introduction ..................1 Chapter 1 Getting Started ..................3 Chapter 2 How to Use This Manual ................ 5 Chapter 3 Operation ....................7 PART TWO Programming the Instrument ............ 13 Chapter 4 Structure of Instrument ................15 Chapter 5 Setpoints Menu ..................

  • Page 7: Part One

    PART ONE Introduction Chapters 1, 2 and 3 introduce the S Room Pressure Controller. This part of the manual is written to give a broad overview of the S . It is recommended that everyone read this as a starting point for understanding how to use this manual and how the S operates.

  • Page 9: Chapter 1 Getting Started

    Chapter 1 Getting Started The S Operation and Service Manual describes how to operate,  calibrate, configure, maintain and troubleshoot the Model 8670 S Room Pressure Controller. It is recommended that this manual is read thoroughly before using the S This manual assumes that the S has been properly installed.

  • Page 11: Chapter 2 How To Use This Manual

    Chapter 2 How To Use This Manual General This manual is divided into four parts. Each part is designed to cover a particular Discussion area of interest for different people. It is recommended that everyone read the entire User's Guide; however, the following guidelines reference the manual sections which are relevant to your situation: Part Title...
  • Page 12 Maintaining the If you are having problems with your S , Part Three (Chapters 9-11) is your main source of reference. However, before you use this part of the manual, it is recommended that you read Part One (Chapters 1-3) and Chapter 4. This will provide you with the background needed to run the DIAGNOSTICS menu to determine the cause of your problems.

  • Page 13: Chapter 3 Operation

    Chapter 3 Operation The S Room Pressure Controller is easy to use. Its operation is simple and straightforward. All the information you need to know about the controlled Room Pressure is displayed on the controller's front panel. All programming is accessible through the keypad.
  • Page 14 Figure 1. S Front Panel Display and Controls. Chapter 3...
  • Page 15 Front Panel Digital Display Displays The alphanumeric digital display indicates the room pressure, status, menu options, and error messages. The display indicates the room pressure continuously, the appropriate status of the control (i.e., normal, alarm, setback, or emergency modes), the menu items as they are selected, and the error messages when they occur.
  • Page 16 Audible Alarm The audible alarm indicates alarm conditions. The audible alarm sounds continually when the room pressure is in an alarm condition. When the audible alarm is configured for alarm follow operation, the alarm continues to sound until the MUTE key is pressed or the room pressure returns to normal. When the audible alarm is configured for alarm latch operation, the audible alarm remains on until the MUTE key is pressed or the room pressure returns to normal and the RESET key is pressed.
  • Page 17 Keys with Blue The S has four keys with blue print that are used together to program the unit for Characters each application. MENU Key The MENU key is used to gain initial access to the menus when the unit is in the normal operating mode.

  • Page 19: Part Two Programming The Instrument

    PART TWO Programming the Instrument Chapters 4, 5, 6, 7 and 8 cover all aspects of programming the S Room Pressure Controller. This part of the manual is written to assist people programming the instrument. TSI realizes that those programming the instrument may have little or no experience with room pressure controllers.

  • Page 21: Chapter 4 Structure Of Instrument

    Chapter 4 Structure of Instrument Programming The four keys with blue characters (refer to Figure 2) are used to access all menus for Instrument programming/calibration of the S Figure 2. Access keys. MENU key: Used to gain initial access to the menus when the unit is in the normal operating mode.
  • Page 22  Save the new value by pressing the SELECT key. Return to normal instrument operation by pressing the MENU key to  escape to higher menu levels. Programming In the following example, we will change the low alarm setpoint from - Example .00035 inches H O to -0.00050 inches H...
  • Page 23 Press the SELECT key to access the low  SELECT alarm setpoint. The item name (LOW ALARM) will now be displayed on line 1 of the display, and the item's current value will be displayed on line 2. LOW ALARM Item Name Item Value -.00035 "H2O...
  • Page 24 If the MENU key was pressed instead of the SELECT key, the new data would not WARNING: have been saved, and the S would have escaped back to the menu level as shown above. Press the MENU key to return to the main ...
  • Page 25 Figure 3. Block Diagram: Items available with S  Structure of Instrument...

  • Page 27: Chapter 5 Setpoints Menu

    Chapter 5 Setpoints Menu The S Room Pressure Controller is a very versatile device which may be adjusted to control and alarm at different setpoints to meet your specific application. This Chapter is a guide to the SETPOINTS menu of the .
  • Page 28 NO-FLO ALARM The NO-FLO ALARM function is used to set a second low alarm setpoint. The magnitude of the NO-FLOW alarm setpoint should be set below the low alarm setpoint to operate as designed. The NO-FLOW ALARM has higher priority than the LOW ALARM. If the NO-FLOW ALARM is set higher than the LOW ALARM, the LOW ALARM is essentially disabled.
  • Page 29 WARNING: The low and high alarms must be set in the same direction as the setpoint. The does not allow a positive setpoint and a negative low alarm. Constraints There are a number of constraints that prohibit the user from incorrectly adjusting the setpoints.

  • Page 31: Chapter 6 Configure Menu

    Chapter 6 Configure Menu The S may be set up to operate in a variety of configurations. This Chapter is a guide for configuring the S The CONFIGURE menu is used to select the display time constant, the display units, alarm relay response, the alarm light response, the audible alarm response, the audible alarm disable, the network status, and the network address.
  • Page 32 ALARM RELAYS The ALARM RELAYS item is used to select whether the low, high, and no-flow relays latch in an alarm condition (LATCHED) or follow in an alarm condition (UNLATCHED). When the alarm latch is selected, the alarm relay contacts close in an alarm condition and remain closed until the room pressure returns to normal and the RESET key is pressed.
  • Page 33 The AOUT FACTOR item is used to select the resolution AOUT FACTOR range of the analog output. A setting of 1 corresponds to - .10000 to .10000 "H2O while a setting of 10 corresponds to -.01000 to .01000 "H2O and a setting of 100 corresponds to -.00100 to .00100 "H2O (see Figure 4 below).
  • Page 34 ACCESS CODE The ACCESS CODE item is used to select whether an access code is required to enter the CONFIGURE menu. The ACCESS CODE item prevents unauthorized access to the CONFIGURE menu. This item is disabled and is not indicated on the display during initial start-up. The ACCESS CODE is enabled by turning the ACCESS CODE to ON.

  • Page 35: Chapter 7 Calibration Menu

    Chapter 7 Calibration Menu The S Room Pressure Controller is calibrated at the factory. The sensor and controller must be kept as a matched set. A yellow warning label is attached to every indicating this as follows: WARNING: Unit is factory calibrated. Controller and sensor must be installed as a matched set.
  • Page 36 END OF MENU The END OF MENU item informs the user that the end of the CALIBRATION menu has been reached. The user can press either the SELECT key or the MENU key to back out to the main menu level. Defaults The S is shipped with a set of factory default values already programmed in...
  • Page 37  Press the SELECT key to gain access to the SELECT CALIBRATION menu.  CALIBRATION SENSOR SPAN  Press the SELECT key to initiate the SELECT SENSOR SPAN sequence. The display will respond with the following response:  SENSOR SPAN Place the air velocity meter sensor in an opening between the controlled room and the 82 FT/MIN...
  • Page 38  Check the calibration. Escape back to the normal operating level, and verify that measured room pressure on the S close to the velocity measured by the air velocity meter. Use the following steps to escape to the normal operating level for verification: MENU CALIBRATION...
  • Page 39 WARNING: Calibrating the span on the S may be an iterative process that takes 1 - 3 trials to get an accurate calibration. You must check the calibration after each trial until an accurate calibration is verified.  Remove the yellow warning label from the ...

  • Page 41: Chapter 8 Control Menu

    Chapter 8 Control Menu The S may be set up to control room pressure at different sensitivities and different speeds for maximum performance. This Chapter is a guide for setting up the control parameters for the S The CONTROL menu is used to select the control SENSITIVITY and the control SPEED.
  • Page 42 For example, with 8 bars displayed and an operating setpoint of 100 ft/min, the integral deadband is between 80 and 120 ft/min. When the measured room pressure velocity is within this range, integral control is used. However, when the room pressure velocity falls below 80 ft/min or rises above 120 ft/min, PID control is used until the operating setpoint is reached.

  • Page 43: Part Three

    PART THREE Diagnostics & Troubleshooting Chapters 9, 10 and 11 cover all aspects of troubleshooting and maintenance of the S Room Pressure Controller. This part is written to give maximum help to the person maintaining, diagnosing or troubleshooting the control system. TSI realizes that many users of TSI equipment have little or no experience with room pressure variable air volume controls.

  • Page 45: Chapter 9 Diagnostics Menu

    Chapter 9 Diagnostics Menu The S is provided with a complete set of built-in diagnostics for easy determination of possible problems. This Chapter is a guide for using the DIAGNOSTICS menu in the S The DIAGNOSTICS menu is used to check the actuator operation, the analog output, the no-flow alarm relay, the low alarm relay, the high alarm relay, the remote setpoint contact input, the emergency contact input, the sensor operation, and the control coefficients.
  • Page 46 The CONTROL OUTP function should not be used while experiments are being WARNING: performed in the laboratory. A closed damper may create dangerously low air flows while an opened damper may create dangerously high air flows thus not maintaining a safe room pressure. ANALOG OUTP The ANALOG OUTP item is used to vary the analog output from the S...
  • Page 47 HIGH RELAY The HIGH RELAY item is used to change the state of the high alarm relay. When this item is entered, the display will indicate either OPEN or CLOSED. The arrow keys are used to toggle the state of the relay. The  arrow key is used to OPEN the alarm contact.
  • Page 48 The CHANGE Kc item provides the user with the ability to manually change the WARNING: Kc value. THE Kc VALUE MUST NEVER BE CHANGED WITHOUT ASSISTANCE FROM THE TSI FACTORY! Contact TSI for assistance in determining your control problem and for instructions on how to change the Kc value.
  • Page 49 END OF MENU The END OF MENU item informs the user that the end of the DIAGNOSTICS menu has been reached. The user can press either the SELECT key or the MENU key to back out to the main menu level. Defaults The S is shipped with a set of factory default values already programmed in...
  • Page 50  Press the  arrow key until the cursor is at  the DIAGNOSTICS menu option. SETPOINTS CALIBRATION  CALIBRATION CONFIGURE  CONFIGURE CONTROL  CONTROL DIAGNOSTICS  Press the SELECT key to access the SELECT CONTROL menu. DIAGNOSTICS CONTROL OUT ...
  • Page 51  Press the SELECT key to initiate the SELECT AUTOTUNE sequence. The display will respond with a message and a countdown to wait until the sequence is complete. AUTOTUNE wait...185 The AUTOTUNE function takes 185 seconds to perform. The above message will remain on the display until the countdown has reached 1 second.

  • Page 53: Chapter 10 Maintenance And Repair Parts

    Chapter 10 Maintenance and Repair Parts The Model 8670 S Room Pressure Controller requires minimal maintenance. Periodic inspection of system components as well as an occasional pressure sensor cleaning are all that are needed to insure that the Model 8670 is operating properly. System Periodically inspect the various system components for proper performance and signs of Component...
  • Page 54 Replacement All components of the Model 8670 are field replaceable. Contact TSI Industrial Test Parts Instruments Group at (800) 777-8356 (U.S. and Canada) or (001 651) 490-2711 (other countries) or your nearest TSI Manufacturer's Representative for replacement part pricing and delivery. Part Number Description...

  • Page 55: Chapter 11 Troubleshooting

    Chapter 11 Troubleshooting The S Room Pressure Controller is straightforward and understandable by personnel who have experience with electronic controls. To assist the person working on a problem, TSI has developed a list of the most likely causes of problems. The troubleshooting chapter is broken into two parts: hardware symptoms and software symptoms.
  • Page 56 Hardware Symptom Possible Cause Corrective Action Fuse is blown. Measure voltage at pins 1 and 2 on S 10-pin connector. The Display is blank. voltage should nominally be 24 VDC when using electric actuators and 24 VAC when using pneumatic actuators or motor speed drives. If 24 volts is present, unplug 10-pin connector from controller for 15 seconds.
  • Page 57 Hardware Symptom Possible Cause Corrective Action Go into DIAGNOSTICS menu, CONTROL OUTP item. See Chapter Bad actuator or E/P (damper doesn't 9 for CONTROL OUTP description. If damper moves, actuator is move). installed and operating correctly. If damper doesn't move, check that: -Jumper is installed correctly on actuator or on E/P.
  • Page 58 Hardware Symptom Possible Cause Corrective Action Defective sensor. Disconnect the sensor cable from the back of the controller. Depress the latching piece on the connector to pull it out. Use an ohmmeter to measure the resistance between the cable wires indicated in figure below.
  • Page 59 Defective sensor cable. Verify wire is terminated the same on both ends of cable. Test sensor cable with an Ohmmeter to ensure that cable terminations are good. See figure below. Wire colors must match pin 1 to 1, pin 4 to 4. "DATA ERROR"...
  • Page 60 Hardware Symptom Possible Cause Corrective Action Remote setback doesn't work. Incorrect wiring or defective switch. Disconnect remote wires from controller. Verify wiring with an Ohmmeter by switching the setback switch open and closed. If operational, reconnect to controller. Verify wiring and switch are good. Enter DIAGNOSTICS menu, Defective controller.
  • Page 61 Hardware Symptom Possible Cause Corrective Action Enter the DIAGNOSTICS menu and select NO-FLOW, LOW or HIGH Relay may be defective. RELAY item to be checked. Manually activate the relay. See Chapter 9 for NO-FLOW, LOW or HIGH RELAY descriptions. If controller does not respond, disconnect device connected to relay.
  • Page 62 Software Symptom Possible Cause Corrective Action Lengthen the time constant by entering the CONFIGURATION menu, The displayed pressure Time constant is very short. TIME CONST. item (see Chapter 6 for TIME CONST. description). fluctuates. Go into CONTROL menu, SPEED item and increase speed by one bar. Caution light momentarily goes Control response is slow.
  • Page 64 Chapter 11...

  • Page 65: Part Four Appendices

    PART FOUR Appendices The appendices cover technical information describing how the S Room Pressure Controller works. This part is written to provide people with performance specifications as well as measurement and control theory. Appendix A describes the specifications. Appendix B describes the theory of operations. Appendix C describes the control theory.
  • Page 66 Part Four...
  • Page 67 Appendix A Specifications Model 8670 S Components Room Pressure Controller Room Pressure Display Range ....... -0.20000 to +0.20000 inches H 2 O Resolution ......5% of reading Display Update ....0.5 sec Inputs Setback Input ....SPST (N.O.) Switch. Closing switch initiates condition.
  • Page 68 Pressure Sensor Dimensions (DxH) ... 2.75 in. x 1.25 in. Weight ......0.2 lb. Temperature Compensated Range ....... 55 to 95°F Power Dissipation .... 0.16 watts at 0 inches H 2 O, 0.20 watts at 0.00088 inches H 2 O Cable Specifications ..

  • Page 69: Appendix B Theory Of Operation

    Appendix B Theory of Operation Introduction to The Model 8670 S Room Pressure Controller continuously controls room pressure by measuring the velocity of the air flow between two rooms. The room pressure in inches of water is calculated from the velocity reading as follows: Pressure = 0.62 x 10 -7 [(V/C) 2 /D] V = measured velocity in ft/min C = the discharge coefficient used to correct...
  • Page 70 Alarm Light The S has an Alarm light which indicates alarms. The Alarm light can be configured for alarm follow operation or alarm latch operation. Alarm Follow Operation. The Alarm light turns on when an alarm condition exists and turns off automatically when the magnitude of the pressure returns to normal.
  • Page 71 Alarm Latch Operation. The audible alarm turns on when an alarm condition exists and remains on until the room pressure returns to normal and the alarm is reset. When the room pressure falls below the low or no-flow alarm setpoint, the audible alarm turns on. The audible alarm remains on until the room pressure rises above the low or no-flow alarm setpoint plus a 20 ft/min differential and the RESET key is pressed.
  • Page 72 The range of the output is configured in the AOUT FACTOR item. A setting of 1 corresponds to a range of -0.10000 to 0.10000 inches H O. A setting of 10 corresponds to a range of -0.01000 to 0.01000 inches H O.
  • Page 73 Remote Setpoint Input A remote contact/switch closure initiates a remote setpoint condition, and a remote contact/switch opening takes S out of remote setpoint mode. For example, a hospital room may be used for different patients, some needing a room at a negative pressure and some at a positive pressure.
  • Page 74 Appendix B...

  • Page 75: Appendix C Control Theory

    Appendix C Control Theory Technical The Model 8670 S Room Pressure Controller continuously controls room Description pressure by measuring the pressure of the air flow between two rooms. The room pressure in inches of water is calculated from the pressure reading as follows: Pressure = 0.62 x 10 -7 [(V/C) 2 /D] V = measured pressure in ft/min C = the discharge coefficient used to correct...
  • Page 76 Figure 5. S Bridge Circuit. Two velocity sensors are needed to sense the direction of the pressure differential. The two sensors are placed in series in the pressure sensor housing. This way, one of the sensors shields the other one depending on the direction of the flow. The voltage drop across each sensor is different because of the shielding.
  • Page 77 which is input to an electric damper/actuator, pneumatic damper/actuator or motor speed controller. Finally, the actuator (or motor speed controller) moves the damper (or adjusts the fan speed) to meet the setpoint as calculated by the control algorithm. Thus, S is a true, simple, closed-loop controller: it modulates the exhaust and/or supply damper to change the air flow so that the pressure measured by the sensor in the wall is equal to the control setpoint.
  • Page 78 The TSI pneumatic and electric actuators sold with S can fully open or close a damper in 5 seconds. Of course, most damper corrections will only require a fraction of this amount of movement. This actuator response time is adequate to keep up with the controller's sampling rate.
  • Page 79 Appendix D Wiring Diagrams Figure 7. Wiring Diagram for use with electric actuator.
  • Page 80 Figure 8. S wiring diagram for use with pneumatic actuator. Appendix D...

  • Page 81: Appendix D Wiring Diagram

    Figure 9. S wiring diagram for use with motor speed drive. Wiring Diagram...
  • Page 82 Jumper Wiring The Model 8670 S Room Pressure Controller can control a damper on supply Information or exhaust. Also, electric or pneumatic actuation may be used to modulate the damper. These conditions create various possibilities for installing and wiring the controller with the actuator.

  • Page 83: Appendix E Access Codes

    Appendix E Access Codes These are the access codes to the different menus of the S controllers: Key # Setpoints Configure Calibration Control Diagnostics EMERGENCY EMERGENCY SETBACK MENU TEST MUTE MENU MENU MUTE MUTE MUTE SETBACK MUTE RESET SETBACK MENU MENU MENU EMERGENCY...

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