Model 8635-M SureFlow Room Pressure Monitor Operation
Contents
1. The alarms audible and visual will activate whenever the preset alarm level is reached Depending on the SUREFLOW monitor items installed programmed alarms will activate when room pressure is low or inadequate when room pressure is high or too great or when the supply or exhaust air flow is insufficient When the laboratory is operating safely no alarms will sound Example The low alarm is preset to activate when the room pressure reaches 0 001 inches H O When the room pressure drops below 0 001 inches H O gets closer to zero the audible and visual alarms activate The alarms turn off when set to unlatched when the unit returns to the safe range which is defined as negative pressure greater than 0 001 inches H5 O Visual Alarm Operation The red light on the front of the unit indicates an alarm condition The red light is on for all low and high alarm conditions Audible Alarms The audible alarm is continuously on in all low and high alarm conditions The audible alarm can be temporarily silenced by pressing the MUTE key The alarm will be silent for a period of time see MUTE TIMEOUT to program time period When the time out period ends the audible alarm turns back on if the alarm condition is still present The user can program the audible alarm to be permanently turned off see AUDIBLE ALM The red alarm light will still turn on in alarm conditions when audible alarm is turned off The audible and visual alarms can be2. User Keys Gray with Black Letters The four keys with black letters provide the user information without changing the operation or the function of the unit TEST Key The TEST key initiates an instrument self test Pressing the TEST key activates a scrolling sequence on the display that shows the product model number software version and all set point and alarm values The unit then performs a self test that tests the display indicator lights audible alarm and internal electronics to ensure they are operating properly If a problem with the unit exists DATA ERROR will be displayed The user should have qualified personal determine the problem with the unit RESET Key The RESET key performs two functions 1 Resets the alarm light alarm contacts and audible alarm when in a latched or non automatic reset mode The room pressure must be in the safe or normal range before the RESET key will operate 2 Clears any displayed error messages MUTE Key The MUTE key temporarily silences the audible alarm The time the alarm is temporarily silenced is programmable by the user see MUTE TIMEOUT When the mute period ends the audible alarm turns back on if the alarm condition is still present NOTE The user can program the audible alarm to be permanently turned off see AUDIBLE ALM AUX Key The AUX key is active only in specialty applications and is not used on the standard SUREFLOW monitor If the AUX key is used a separate manual sup
3. Sliding the door panel to the right reveals a digital display and keypad Figure 2 The display shows detailed information about room pressure alarms etc The keypad allows the user to test the device and program or change the device parameters N 3 ooo ooo 3 NS Figure 2 Digital Interface Module DIM SUREFLOW monitor has two levels of user information 1 SUREFLOW monitor has light and green light to provide continuous information on room pressure status 2 SUREFLOW monitor has a hidden operator panel providing detailed room status information self testing capabilities and access to the software programming functions NOTE The unit provides continuous room pressure status through the red and green light The operator panel is normally closed unless further information on room pressure status is needed or software programming is required 2 Part One Operator Panel The DIM in Figure 3 shows the location of the digital display keypad and lights An explanation of the operator panel follows the figure Red 2 Line Alarm Digital Display Light Green Keys Safe Light Figure 3 SunEFLow Monitor Operator Panel Open Green Red light The green light is on when all the conditions for proper room pressure are adequate This light indicates the laboratory is operating safely If any of the room press
4. 24 to 30 VAC If correct voltage is measured internal DIM fuse is probably blown Unplug 14 pin connector from DIM for 2 minutes The internal fuse will automatically reset Plug unit back in and check display If display is still blank check all wiring etc If no problems are found replace DIM If zero volts are measured see No power to DIM Verify circuit breaker is on Verify transformer primary measures 110 VAC Verify transformer secondary measures 24 to 30 VAC If proper voltage is found between pins 1 and 2 of the DIM all wiring has been checked fuses have been reset and screen is still blank the DIM is probably defective Replace DIM Pressure sensor must have address of 1 Check pressure sensor dip switches 5 amp 6 and verify address is correct 7 12 must be OFF Sliding Pressure Sensor OFF FOR REFERENCE SPACE ON FOR CONTROLLED SPACE ON FOR ADDRESS 1 OFF FOR ADDRESS 1 Figure 8 Pressure sensor DIP switch Sensor communications not working Check SENSOR STAT item in diagnostics menu If NORMAL is displayed sensor is okay if COMM ERROR is displayed check wiring pressure sensor address and that dip switch 1 amp 2 are ON Figure 8 Part Two Symptom Possible Cause Corrective Action Pressure sensor red LED is blinking Figure 8 DIM always displays 0 200 inches H5O DIM does not respond to RS 485 communications DIM displays opposite pressure signal
5. Alarm relays don t work Problem with sensor slow uniform blink Communication fast burst of non uniform blinking Red LED is constantly on Incorrect pressure sensor output Network protocol is incorrect Incorrect network address Incompatible software Sensor direction is incorrect Alarms are turned off Incorrect wiring Relay may be defective Technical Section Check SENSOR STAT and confirm NORMAL is displayed If ERROR is displayed correct error Unit is communicating with DIM This is normal This is normal when no problems exist or when no communication is occurring Pressure sensor must be set for 0 to 10 volt output not 4 to 20 mA do not confuse this output with DIM analog output Check pressure sensor dip switch 3 and make sure it is OFF see Figure 8 Go into INTERFACE menu NET PROTOCOL item The protocol must match host system Select correct interface The network address at the building automation system and at the DIM must match The network address must be unique for each DIM Data sent to DIM may be in form that the SUREFLOW monitor cannot recognize Pressure sensor must have dip switch correctly set for proper sign display Verify dip switch 4 is ON when sensor is mounted in the laboratory controlled space and OFF when sensor is mounted in corridor reference space See Figure 8 Press TEST key The individual alarm set points will display If all a
6. SUREFLOW monitor is a very versatile device which can be configured to meet your specific application This section describes all of the menu items available to program and change except diagnostics menu Changing any item is accomplished by using the keypad or if communications are installed through the RS 485 Communications port If you are unfamiliar with the keystroke procedure please see Software Programming for a detailed explanation This section provides the following information Complete list of menu and all menu items Gives the menu or programming name Defines each menu item s function what it does how it does it etc Gives the range of values that can be programmed Gives default item value how it shipped from factory The menus covered in this section are divided into groups of related items to ease programming As an example all calibration items are in one menu alarm information in another etc The manual follows the menus as programmed in the controller The menu items are always grouped by menu and then listed in menu item order not alphabetical order Figure 5 shows a chart of all the Model 8635 M monitor menu items 12 Part Two ALARM LOW ALARM HIGH ALARM REM LOW ALM REM HIGH ALM MIN FLOW ALM ALARM RESET AUDIBLE ALM ALARM DELAY DOOR DELAY MUTE TIMEOUT ACCESS CODE CONFIGURE DISPLAY AVG UNITS DUCT AREA FLO STA TYPE TOP VELOCITY ROOM VOLUME ACCESS CODE CALIBRATION SENSOR Z
7. informs the user that the end of a menu has been reached The user can either scroll back up the menu to make changes or press the SELECT or MENU key to exit out of the menu INTERFACE MENU MENU ITEM F S NETWORK PROTOCOL S NETWORK ADDRESS OUTPUT RANGE bo SOFTWARE NAME NET PROTOCOL NET ADDRESS OUTPUT RANGE ITEM DESCRIPTION ITEM RANGE The NET PROTOCOL item selects the communications protocol MODBUS used to interface with the building management system or CIMETRICS The NET ADDRESS item is used to select the main network address 1 to 247 of the individual room pressure device Each unit on the network must have its own unique address The values range from 1 247 If RS 485 communications are being used then a unique NET ADDRESS must be entered into the unit There is no priority between the RS 485 and keypad The most recent signal by either RS 485 or keypad will initiate a change RS 485 communications allows the user access to all menu items except calibration items The RS 485 network can initiate a change at any time The OUTPUT RANGE item selects the resolution range of the LOW or HIGH analog pressure signal output There are two choices LOW 0 01000 to 0 01000 H 0 HIGH 0 10000 to 0 10000 H 0 0 volt 4 mA represents maximum negative pressure differential 5 volts 12 mA represents a 0 room pressure differential 10 volts 20 mA represents maximum positive pressure different
8. normally does not need to be adjusted However inaccurate readings may be detected if pressure sensor is not installed correctly or problems with the sensor exists First check that the sensor is installed correctly usually only a problem on initial set up Second go into DIAGNOSTICS menu SENSOR STAT item If NORMAL is displayed calibration can be adjusted If an error code is displayed eliminate error code and then verify pressure sensor needs adjustment All pressure transducer based flow stations and 1 to 5 VDC linear flow stations must be zeroed upon initial system setup Linear 0 to 5 VDC flow stations do not require a zero flow to be established Adjusting the SUREFLOW monitor calibration may be required to eliminate errors due to convection currents HVAC configuration or equipment used to make the measurement TSI recommends always taking the comparison measurement in the exact same location i e under the door middle of door edge of door etc A thermal air velocity meter is needed to make the comparison measurement Normally the velocity is checked at the crack under the doorway or the door is opened 1 to allow alignment of the air velocity probe making the measurement If the crack under the door is not large enough use the 1 open door technique Calibrating pressure sensor primary sensor or second sensor Enter calibration menu see Software Programming if not familiar with key stroke procedure Access code is
9. of the manual The manual focuses on laboratory spaces but the product information is accurate for any room pressure application The Instrument SUREFLOW monitor measures and reports room pressure Proper room pressure can control airborne contaminants that can adversely affect experiments workers in the laboratory and people in the laboratory vicinity For example laboratories with fume hoods need negative room pressure air flowing into the room to minimize exposure to people outside the laboratory The fume hood is the first level of containment and the laboratory itself is the second level of containment Room pressure or pressure differential is created when one space hallway is at a different pressure than an adjoining space laboratory When a pressure differential is created between two spaces air is forced to flow from the higher pressure space to the lower pressure space The direction of air flow is one component of proper room pressure The second component of room pressure is the speed or how fast is the air moving between the two spaces The SUREFLOW monitor provides both pieces of information by measuring whether the air is flowing into or out of a laboratory and the speed of the air Negative room pressure is present when air flows from a hallway into the laboratory If air flows from the laboratory into the hallway the room is under positive pressure Figure 1 gives a graphic example of positive and negat
10. ATA ERROR at the end of the test the electronics may be corrupted Check all software items to determine cause of DATA ERROR If SELF TEST PASSED is displayed proceed to test individual components Enter Diagnostics Menu and check the following e Sensor input e Sensor status e Analog output These diagnostic menu items are explained in detail in the next section Diagnostics Menu of the manual so their function is not reviewed here If the SUREFLOW system passes each of the tests the mechanical piece parts are all functioning correctly TEST Sensor input Enter SENSOR INPUT menu item in diagnostics menu A voltage between 0 and 10 volts DC will be displayed It is not important what the exact voltage is to pass this test Tape over the pressure sensor slide pressure sensor door open and voltage should read approximately 5 volts zero pressure Remove tape and blow on sensor Displayed value should change If voltage changes the unit passes If voltage doesn t change proceed to TEST Sensor status TEST Sensor status Enter SENSOR STAT menu item in diagnostics menu If NORMAL is displayed the unit passes test If an error message is displayed go to diagnostics menu section of the manual SENSOR STAT menu item for explanation of error message TEST Analog output NOTE This test is only performed if analog output feature is being used Enter ANALOG OUT menu item in diagnostics menu A value between 0
11. CON RED BLK RED BLK GRN WHT ORN BLU TACTS TACTS 24 VAC SENSOR SENSOR ANALOG SWITCH 7 OUT RS485 OUTPUT IN LOW ALARM RELAY 15 16 21 22 23 24 25 26 COM COM CON CON A B TACTS TACTS RS485 FLOW NOT IN USED HIGH ALARM RELAY MONITOR P N 800222 Appendix B Appendix Access Codes These are the access codes to the different menus of the SUREFLOW monitor When an access code is required pressing the following key sequence will provide access to the required menu Key Alarm Configure Calibration Interface Diagnostics 1 TEST EMERGENCY AUX TEST TEST 2 TEST MENU MENU EMERGENCY MUTE 3 MUTE AUX MUTE AUX AUX 4 EMERGENCY MENU MENU MUTE AUX 5 MENU MENU AUX MENU MENU 39 40 This page intentionally left blank Appendix C TSI Incorporated 500 Cardigan Road Shoreview MN 55126 U S A USA Tel 1 800 874 2811 E mail answers tsi com Website www tsi com Tel 44 1494459200 E mail tsiuk tsi com Website www tsiinc co uk A France Tel 33 491118764 E mail tsifrance tsi com Website www tsiinc fr Germany Tel 49 241 523030 E mail tsigmbh tsi com Website www tsiinc de India Tel 91 80 41132470 E mail tsi india tsi com China Tel 86 10 8251 6588 E mail tsibeijing tsi com Singapore Tel 65 6595 6388 E mail tsi singapore tsi com n TRUST SCIENCE INNOVATION Contact your local TS Distributor or visit our website www tsi c
12. CONTROLLED ENVIRONMENTS Critical Environments Model 8635 M SUREFLOW Room Pressure Monitor Operation and Service Manual P N 1980272 Revision D August 2010 q b _ SCIENCE INNOVATION TM Models 8635 M SUREFLOW Room Pressure Monitor Operation and Service Manual P N 1980272 Revision D August 2010 U S AND CANADA OTHER COUNTRIES Sales amp Customer Service Sales amp Customer Service 800 874 2811 651 490 2811 001 651 490 2811 651 490 3824 001 651 490 3824 E MAIL TSI Incorporated answers tsi com ATTN Customer Service 500 Cardigan Road WEB SITE Shoreview MN 55126 www tsi com USA v Copyright TSI Incorporated 2000 2010 All rights reserved Part number 1980272 Rev D LIMITATION OF WARRANTY AND LIABILITY Seller warrants the goods sold hereunder under normal use and service as described in the operator s manual shall be free from defects in workmanship and material for twenty four 24 months or the length of time specified in the operator s manual from the date of shipment to the customer This warranty period is inclusive of any statutory warranty This limited warranty is subject to the following exclusions a Hot wire or hot film sensors used with research anemometers and certain other components when indicated in specifications are warranted for 90 days from the date of shipment b Parts repaired or replaced as a result of repair services are warranted to be free from de
13. ERO SENSOR SPAN FLOW ZERO ELEVATION ACCESS CODE INTERFACE NET PROTOCOL NET ADDRESS OUTPUT RANGE OUTPUT SIG ACCESS CODE Menu item description located in Troubleshooting section Figure 5 Menu Items Model 8635 M Monitor Technical Section DIAGNOSTICS SENSOR INPUT SENSOR STAT ANALOG OUT SWITCH INPUT FLOW INPUT LOW ALM REL HIGH ALM REL ACCESS CODE 13 vl OM Weg ALARM MENU MENU ITEM LOW PRESSURE ALARM HIGH PRESSURE ALARM REMOTE OR SECOND LOW ALARM REMOTE OR SECOND HIGH ALARM SOFTWARE NAME LOW ALARM HIGH ALARM REM LOW ALM REM HIGH ALM ITEM DESCRIPTION The LOW ALARM item sets the low pressure alarm set point A low alarm condition is defined as when the magnitude of the room pressure falls below or goes in the opposite direction of the LOW ALARM set point This item is enabled when the SWITCH INPUT contact closure pins 11 and 12 is open or the RS 485 communications sends a command The HIGH ALARM item sets the high pressure alarm set point A high alarm condition is defined as when the magnitude of the room pressure rises above the HIGH ALARM set point This item is enabled when the SWITCH INPUT contact closure pins 11 and 12 is open or the RS 485 communications sends a command The REM LOW ALM item sets a remote or second low pressure alarm set point A remote low alarm condition is defined as when the magnitude of the room pressure falls below or goes in
14. LAY is usually set for a longer period of time than the ALARM DELAY This delay affects the visual alarm audible alarm and relay outputs The DOOR DELAY prevents nuisance alarms from people leaving the doors open to move equipment into or out of the laboratory or when a large group will be entering or leaving the laboratory This DOOR DELAY is enabled when the SWITCH INPUT contact closure pins 11 and 12 is closed or the RS 485 communications sends a command NOTE When the switch input is closed the remote alarms are activated and the standard alarms and ALARM DELAY are turned off Set the remote alarms equal to the standard alarms if the same alarms are required delay would just change The MUTE TIMEOUT determines the length of time the audible 5 to 30 MINUTES alarm is silenced after the MUTE key is pressed This delay temporarily mutes the audible alarm NOTE If the DIM is in alarm when MUTE TIMEOUT expires the audible alarm turns on When the pressure returns to the safe range the MUTE TIMEOUT is canceled If the room goes back into an alarm condition the MUTE key must be pressed again to mute the audible alarm The ACCESS CODE item selects whether an access code pass ON or OFF code is required to enter the menu The ACCESS CODE item prevents unauthorized access to a menu If the ACCESS CODE is ON a code is required before the menu can be entered Conversely if the ACCESS CODE is OFF no code is required to enter the men
15. PPENDIX SPECIFICATIONS esee 35 APPENDIX B WIRING INFORMATION eem Re 37 APPENDIX C ACCESS CODES 2 2 e pce eene 39 How to Use This Manual The SUREFLOW monitor Operation and Service Manual is divided into two parts Part one describes how the SUREFLOW unit functions and how to interface with the device This section should be read by users facilities staff and anyone who requires a basic understanding of how the SUREFLOW monitor operates Part two describes the technical aspects of the product which includes operation calibration configuration maintenance and troubleshooting Part two should be read by personnel programming or maintaining the unit TSI recommends thoroughly reading this manual before changing any software items NOTE This operation and service manual assumes proper SUREFLOW monitor installation Refer to the Installation Instructions to determine if the SUREFLOW monitor has been properly installed iii This page intentionally left blank PART ONE User Basics Reading product manuals should not be a difficult and time consuming process This section provides a brief but thorough overview of the SUREFLOW product by maximizing information with minimal reading These few pages explain the purpose The Instrument and the operation Useful User Information Digital Interface Module Alarms of the unit Technical product information is available in Part Two
16. The LOW ALM REL item is used to change the state of the low alarm relay When this item is entered the display will indicate either OPEN or CLOSED The keys used to toggle the state of the relay The A key is used to OPEN the alarm contact The key is used to CLOSE the alarm contact When the contact is closed the LOW ALM REL should be in an alarm condition High Alarm Relay Menu Item HIGH ALM REL The HIGH ALM REL 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 A W keys used to toggle the state of the relay The A key is used to OPEN the alarm contact The key is used to CLOSE the alarm contact When the contact is closed the HIGH ALM REL should be in an alarm condition Access Code Menu Item ACCESS CODE The ACCESS CODE item selects whether an access code pass code is required to enter the menu The ACCESS CODE item prevents unauthorized access to a menu If the ACCESS CODE is ON code is required before the menu can be entered Conversely if the ACCESS CODE is OFF no code is required to enter the menu Technical Section 31 Troubleshooting Chart Symptom Possible Cause Corrective Action Display is blank Sensor does not calibrate 32 Fuse is blown No power to DIM DIM is defective Incorrect pressure sensor address Measure voltage at pins and 2 on DIM The voltage should nominally be
17. a must be entered in cubic meters be first calculated and then entered The air change per hour is calculated using the ROOM VOLUME 10 the unit the input from the air flow station If no flow station is installed a zero value should be entered The ACCESS CODE item selects whether an access code pass ON or OFF OFF code is required to enter the menu The ACCESS CODE item prevents unauthorized access to a menu If the ACCESS CODE is ON a code is required before the menu can be entered Conversely if the ACCESS CODE is OFF no code is required to enter the menu The END OF MENU item informs the user that the end of a menu has been reached The user can either scroll back up the menu to make changes or press the SELECT or MENU key to exit out of the menu 01 2 5 Jpoiuuoap CALIBRATION MENU MENU ITEM SENSOR ZERO SENSOR SPAN FLOW ZERO ELEVATION SOFTWARE NAME SENSOR ZERO SENSOR SPAN FLOW ZERO ELEVATION ITEM DESCRIPTION The SENSOR ZERO item is used to calibrate the SUREFLOW pressure sensor A sensor zero should be established prior to adjusting the sensor span see Calibration section following menu item section The SENSOR SPAN item is used to match or calibrate the SUREFLOW velocity sensors to the average room pressure velocity as measured by a portable air velocity meter A sensor zero should be established prior to adjusting the sensor span see Calibration section followin
18. aminants Use extreme care when cleaning the velocity sensors The ceramic sensor may break if excessive pressure is applied if sensor is scraped to remove contaminants or if the cleaning apparatus abruptly impacts the sensor WARNING If you are using a liquid to clean the sensor turn off power to the Model 8635 Do not use compressed air to clean the velocity sensors Do not attempt to scrape contaminants from the velocity sensors The velocity sensors are quite durable however scraping may cause mechanical damage and possibly break the sensor Mechanical damage due to scraping voids the pressure sensor warranty Technical Section 27 Replacement Parts All components of the room pressure monitor are field replaceable Contact TSI HVAC Control Products at 800 874 2811 U S and Canada or 001 651 490 2811 other countries or your nearest TSI Manufacturer s Representative for replacement part pricing and delivery Part Number 800222 Model 8635 Pressure Monitor 800326 Pressure Sensor 800248 Sensor Cable 800414 Transformer Cable 800420 Troubleshooting Section The SUREFLOW Room Pressure Monitor is designed to be trouble free However installation problems or interaction with other HVAC components may cause system problems The SUREFLOW system is easy to trouble shoot if an organized approach to evaluate the system is taken Troubleshooting is broken down into hardware and software problems Hardware problems deal
19. and 255 will be displayed Hook up DC voltmeter to pins 9 and 10 Press the A V keys to change output from 0 to 255 Voltage should change from 10 volts to zero volts 20 mA to 0 mA if current output TEST Flow station Enter FLOW INPUT menu item in diagnostics menu A voltage between 0 and 5 volts DC will be displayed The exact voltage displayed is not important as long as the voltage varies Technical Section 29 as flow changes Zero volts equals no flow while 5 volts is maximum flow The signal is linear so a correlation between flow and voltage can be established If unit passed all tests the mechanical components are physically working If problems still exist go to troubleshooting chart for additional information on both hardware and software symptoms Diagnostics Menu The items in the diagnostic menu aid in identifying problems the staff may encounter The items in this menu temporarily change the function by pressing the A W keys No permanent change occurs with these menu items Items are exited by pressing the MENU key When an item is exited the SUREFLOW monitor returns to its normal state Sensor Input Menu item SENSOR INPUT The SENSOR INPUT item is used to verify that the DIM is receiving a signal from the sensor When this item is entered a voltage will be indicated on the display The exact voltage displayed is relatively unimportant It is more important that the voltage is changing which indicates the sens
20. ccess codes are found in Appendix C Appendix C may have been removed from the manual for security reasons Press the SELECT key to access chosen item The top line of display shows menu item selected while the second line shows current item value Use the A F keys to change item value Save the new value by pressing the SELECT key pressing the MENU key will exit out of menu function without saving data Press the MENU key to exit current menu and return to main menu Press the MENU key again to return to normal instrument operation If more than one item is to be changed skip steps 8 and 9 until all changes are complete If more items in the same menu are to be changed scroll to them after saving the data step 7 If other Technical Section menus need to be accessed press the MENU key once to access list of menus The instrument is now at step 2 of the keystroke sequence Programming Example The following example demonstrates the keystroke sequence explained above In this example the high alarm set point will be changed from 0 002 inches H50 to 0 003 inches H5O 10 Unit is in normal operation scrolling room pressure flows etc Pressure is shown in this case Press the MENU key to gain access to the menus The first 2 menu choices are displayed Press the SELECT key to access the ALARM menu NOTE Blinking cursor must be on A in Alarm Line 1 shows menu selected Line 2 shows first menu item Press
21. cted when TSI flow stations with pressure transducers are installed LINEAR is selected when a linear output flow station is installed 0 5 VDC Typically a thermal anemometer based flow station The TOP VELOCITY item is used to input the maximum velocity of a linear flow station A TOP VELOCITY must be input for linear flow station to operate NOTE Pressure based flow stations must set this function to zero ITEM RANGE 0 75 1 2 3 5 10 20 or 40 seconds FT MIN m s mm 0 to 10 square feet 0 to 0 9500 square meters The DIM does not compute area The area must be first calculated and then entered into the unit PRESSURE or LINEAR 0 to 5 000 FT MIN DEFAULT VALUE 20 seconds H O PRESSURE 0c OM ed CONFIGURE MENU MENUITEM SOFTWARE ROOM ROOM VOLUME VOLUME ACCESS CODE ACCESS CODE END OF MENU ITEM DESCRIPTION ITEM RANGE DEFAULT VALUE The ROOM VOLUME item is used to input the volume of the room O to 20 000 cubic 0 The room volume is required to calculate air changes per hour feet 0 to 550 cubic Entering a value for the volume will add the air changes per hour meters value to the display s scrolling sequence If a zero value is entered the i The DIM does not air changes per hour will not scroll on the display compute volume If the DIM displays English units area must be entered in cubic feet If The volume must metric units are displayed are
22. edure which takes 10 seconds is automatic Press SELECT key to save data Install flow station back in duct Part Two Maintenance and Repair Parts The Model 8635 SUREFLOW Room Pressure Monitor 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 8635 is operating properly System Component Inspection It is recommended that the pressure sensor be periodically inspected for accumulation of contaminants The frequency of these inspections is dependent upon the quality of the air being drawn across the sensor Quite simply if the air is dirty the sensors will require more frequent inspection and cleaning Visually inspect the pressure sensor by sliding open the sensor housing door Figure 7 The air flow orifice should be free of obstructions The small ceramic coated sensors protruding from the orifice wall should be white and free of accumulated debris TSL Sensor Sliding Cover Pressure Sensor Figure 7 Pressure sensor door slid open Periodically inspect the other system components for proper performance and physical signs of excessive wear Pressure Sensor Cleaning Accumulations of dust or dirt can be removed with a dry soft bristled brush such as an artist s brush If necessary water alcohol acetone or trichlorethane may be used as a solvent to remove other cont
23. erstand that the negative positive low alarm must be between zero 0 pressure and the negative positive high alarm value OM Wed 012 1 61 CONFIGURE MENU MENU ITEM SOFTWARE NAME DISPLAY DISPLAY AVG AVERAGE UNITS UNITS DUCT AREA DUCT AREA FLOW FLO STA TYPE STATION TYPE MAXIMUM TOP FLOW VELOCITY STATION VELOCITY ITEM DESCRIPTION The DISPLAY AVG item selects the display s averaging period The display averaging period is the length of time the room pressure has been averaged before being displayed The DISPLAY AVG item value may be set between 0 75 and 40 seconds The higher the averaging value the more stable the display The UNITS item selects the unit of measure that the monitor displays all values except calibration span These units display for all menu items alarm set points flows etc The DUCT AREA item is used to input the duct size The duct size is needed to compute the flow out of the room This item requires a TSI flow station to be mounted in the duct When a duct area if programmed the display will automatically scroll the actual flow as part of the display sequence If a zero value is entered the flow value will not scroll on the display If the DIM displays English units area must be entered in square feet If metric units are displayed area must be entered in square meters The FLO STA TYPE item is used to select the input signal for the flow station PRESSURE is sele
24. face Module DIM and sensor NOTE 24 VAC becomes polarized when connected to DIM 1 24 VAC power for Pressure Sensor 2 4 to 10 VDC pressure sensor signal RS 485 communications between DIM and pressure sensor 1 0 to 10 VDC 4 to 20 mA pressure differential signal 11 12 Input Non powered switch input When input is closed these software items are enabled REMOTE LOW ALARM REMOTE HIGH ALARM and DOOR DELAY See menu items LOW ALARM REMOTE LOW ALARM automation system eee 19 20 21 22 0 to 5 VDC flow station signal supply or exhaust duct 23 24 Nofuncioninthisuni 25 26 Output High alarm relay N O closes in high alarm condition See menu items HIGH ALARM REMOTE HIGH ALARM WARNING The wiring diagram shows polarity on many pairs of pins H N Damage to the DIM may occur if polarity is not observed 37 38 120 VAC IN 24 VAC TRANSFORMER P N 800420 TRANSFORMER CABLE P N 800414 DIGITAL INTERFACE MODULE DIM His 4 5 5 7 8 PRESSURE SENSOR ee P N 800326 __ SENSOR CABLE 6 CONDUCTOR P N 800248 E dis sioe 24 VAC IN 2514151617181 9 11 12 13 14 CON
25. fects in workmanship and material under normal use for 90 days from the date of shipment c Seller does not provide any warranty on finished goods manufactured by others or on any fuses batteries or other consumable materials Only the original manufacturer s warranty applies d Unless specifically authorized in a separate writing by Seller Seller makes no warranty with respect to and shall have no liability in connection with goods which are incorporated into other products or equipment or which are modified by any person other than Seller The foregoing is IN LIEU OF all other warranties and is subject to the LIMITATIONS stated herein NO OTHER EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR PARTICULAR PURPOSE OR MERCHANTABILITY IS MADE TO THE EXTENT PERMITTED BY LAW THE EXCLUSIVE REMEDY OF THE USER OR BUYER AND THE LIMIT OF SELLER S LIABILITY FOR ANY AND ALL LOSSES INJURIES OR DAMAGES CONCERNING THE GOODS INCLUDING CLAIMS BASED ON CONTRACT NEGLIGENCE TORT STRICT LIABILITY OR OTHERWISE SHALL BE THE RETURN OF GOODS TO SELLER AND THE REFUND OF THE PURCHASE PRICE OR AT THE OPTION OF SELLER THE REPAIR OR REPLACEMENT OF THE GOODS IN NO EVENT SHALL SELLER BE LIABLE FOR ANY SPECIAL CONSEQUENTIAL OR INCIDENTAL DAMAGES SELLER SHALL NOT BE RESPONSIBLE FOR INSTALLATION DISMANTLING OR REINSTALLATION COSTS OR CHARGES No Action regardless of form may be brought against Seller more than 12 months after a cause of action has accrued The
26. g menu item listing The FLOW ZERO item is used to establish the flow station zero flow point A zero or no flow point needs to be established prior to using the flow measurement output see Calibration section following menu item listing All pressure based flow stations need to have a FLOW ZERO established on initial set up Linear flow stations with a 1 5 VDC output also need to have a FLOW ZERO established Linear flow stations with a 0 5 VDC output do not need a FLOW ZERO The ELEVATION item is used to enter the elevation of the building above sea level This item has a range of 0 to 10 000 feet in 1 000 foot increments The pressure value needs to be corrected due to changes in air density at different elevations ITEM RANGE NONE NONE NONE 0 to 10 000 feet above sea DEFAULT VALUE Unit is factory calibrated No initial adjustment should be necessary Unit is factory calibrated No initial adjustment should be necessary CC OM Wed CALIBRATION MENU MENUITEM SOFTWARE NAME ACCESS ACCESS CODE CODE END OF MENU ITEM DESCRIPTION ITEM RANGE DEFAULT VALUE The ACCESS CODE item selects whether an access code pass ON or OFF ON code is required to enter the menu The ACCESS CODE item prevents unauthorized access to a menu If the ACCESS CODE is ON a code is required before the menu can be entered Conversely if the ACCESS CODE is OFF no code is required to enter the menu The END OF MENU item
27. goods returned under warranty to Seller s factory shall be at Buyer s risk of loss and will be returned if at all at Seller s risk of loss Buyer and all users are deemed to have accepted this LIMITATION OF WARRANTY AND LIABILITY which contains the complete and exclusive limited warranty of Seller This LIMITATION OF WARRANTY AND LIABILITY may not be amended modified or its terms waived except by writing signed by an Officer of Seller SERVICE POLICY Knowing that inoperative or defective instruments are as detrimental to TSI as they are to our customers our service policy is designed to give prompt attention to any problems If any malfunction is discovered please contact your nearest sales office or representative or call TSI s Customer Service department at 800 874 2811 or 651 490 2811 TRADEMARKS SUREFLOW is a trademark of TSI Incorporated CONTENTS HOW TO USE THIS 1 PART ONE USER BASICS DURER a a 1 UMS Ms 1 Operator Panel ear see aiaia a ea 3 DARII ES 5 Before Calling e titi Prae pi dae trea ee rue 6 PART TWO TECHNICAL SECTION adiens 7 Software Programming srira 8 Menu and Menu rsrsrsrsrs ieina 12 ler 25 Maintenance and 27 Troubleshooting Section 28 A
28. he SELECT key and the menu item will now appear on the first line of the display and the second line will show the item value Pressing the SELECT key when finished changing an item will save the data and exit back to the menu items An audible tone 3 beeps and visual display saving data gives confirmation data is being saved Keys The keys are used to scroll through the menus menu items and through the range of item values that can be selected Depending on the menu item selected the value may be numerical specific property on off or a bar graph NOTE When programming a menu item continuously pressing the arrow key will scroll through the values faster than if arrow key is pressed and released Keystroke Procedure The keystroke operation is consistent for all menus The sequence of keystrokes to follow is the same regardless of the menu item being changed 1 2 8 9 Press the MENU key to access the main menu Use the A F keys to scroll through the menu choices The blinking cursor needs to be on the first letter of the menu you want to access Press the SELECT key to access chosen menu The menu selected is now displayed on line one and the first menu item is displayed on line 2 Use the A V keys to scroll through the menu items Scroll through the menu items until desired item is displayed NOTE If Enter Code is flashing the access code must be entered before you can enter the menu A
29. ial If the actual pressure exceeds the range the output remains at maximum or minimum depending on direction of flow The SUREFLOW monitor updates the analog output every 0 1 second This signal outputs a linear 0 to 10 volt direct current VDC or 4 to 20 mA DC analog output which corresponds to the measured room pressure DEFAULT VALUE MODBUS HIGH vc OM Wed INTERFACE MENU MENUITEM SOFTWARE NAME OUTPUT OUTPUT SIGNAL SIG ACCESS CODE ACCESS CODE END OF MENU ITEM DESCRIPTION ITEM RANGE DEFAULT VALUE The OUTPUT SIG item selects the type of analog pressure signal 10 VDC or4to20mA Oto 10 VDC output The analog output signal can either be 0 to 10 VDC or 4 to 20 mA The ACCESS CODE item selects whether an access code pass ON or OFF OFF code is required to enter the menu The ACCESS CODE item prevents unauthorized access to a menu If the ACCESS CODE is ON a code is required before the menu can be entered Conversely if the ACCESS CODE is OFF no code is required to enter the menu The END OF MENU item informs the user that the end of a menu has been reached The user can either scroll back up the menu to make changes or press the SELECT or MENU key to exit out of the menu Calibration The calibration section explains how to calibrate the SUREFLOW pressure sensor including setting the proper elevation and how to zero a flow station NOTE The SUREFLOW pressure sensor is factory calibrated and
30. ing and should not need adjustment The Digital Interface Module DIM is programmed with a default configuration that can be easily modified to fit your application The Technical section is separated into five parts that cover all aspects of the unit Each section is written as independently as possible to minimize flipping back and forth through the manual for an answer The Software Programming section explains the programming keys on the DIM In addition the programming sequence is described which is the same regardless of the menu item being changed At the end of this section is an example of how to program the DIM The Menu and Menu Item section lists all of the software items available to program and change The items are grouped by menu which means all calibration items are in one menu alarm items in another etc The menu items and all related information is listed in table format and includes programming name description of menu of item range of programmable values and how the unit shipped from the factory default values The Calibration section describes the required technique to compare the pressure sensor reading to a thermal anemometer and how to adjust the zero and span to obtain an accurate calibration This section also describes how to zero a flow station The Maintenance and Repair Parts section covers all routine maintenance of equipment along with a list of repair parts The Troubleshooting section is s
31. ive room pressure gt 3 Room Room Negative Positive Figure 1 Room Pressure An example of negative pressure is a bathroom with an exhaust fan When the fan is turned on air is exhausted out of the bathroom creating a slight negative pressure when compared to the hallway This pressure differential forces air to flow from the hallway into the bathroom The SUREFLOW device informs the laboratory users when the laboratory is under proper pressure and provides alarms when the room pressure is inadequate If the room pressure is in the safe range a green light is on If the pressure is inadequate a red alarm light and audible alarm turn on The SUREFLOW monitor consists of two pieces a pressure sensor and a Digital Interface Module DIM The pressure sensor is mounted above the doorway entrance to the laboratory Usually the DIM is mounted close to the entrance to the laboratory The pressure sensor continuously measures the room pressure and provides room pressure information to the DIM The DIM continuously reports the room pressure and activates the alarms when necessary SUREFLOW monitor is a continuous measuring system providing instant information on the room pressure Useful User Information The DIM has a green light and red light to indicate room pressure status The green light is on when the room has proper room pressure The red light comes on when an alarm condition exists
32. larm set points are zero alarm relay is not active so relay will not be required to change state Check the wiring from SUREFLOW monitor relay s output to the device that is connected to the relays Disconnect the wiring from relay contact pins 13 and 14 for low alarm relay and pins 25 and 26 for high alarm relay Go into DIAGNOSTICS menu LOW ALM REL or HIGH ALM REL Connect an ohmmeter to relay terminals to verify contact open and closes Press the A V key to manually trip the relay If relay responds contact opens and closes the device connected is incompatible or defective If relay doesn t respond relay is defective may be caused by incompatible device Replace DIM 33 Symptom Possible Cause Corrective Action All data may be lost or changed Review all configuration parameters DATA ERROR is removed by pressing the RESET key DATA ERROR flashing on display Displayed pressure wildly fluctuating 34 DIM was hit by electrical disturbance Exhaust or supply system unstable Supply or exhaust air is affecting the sensor Check supply and exhaust flow for stability Verify reference pressure is not fluctuating Check location of supply air diffusers and exhaust grilles They should be as far from pressure sensor as is realistic 6 feet preferred 2 2 feet minimum Supply diffuser terminal throw velocity must be less than 10 ft min at the sensor Relocate supply or exhaust as needed Part T
33. ltage current output Pressing the W key will decrease the analog output and increase the value displayed Pressing the A key will increase the analog output and decrease the value displayed The ANALOG OUT function can be used in conjunction with a volt meter to verify the analog output is correct Part Two Switch Input Menu Item SWITCH INPUT The SWITCH INPUT item reads the input of the SWITCH IN contact pins 11 and 12 When this item is entered the display will indicate either open or closed If the display indicates open the DIM is in LOW ALARM HIGH ALARM and ALARM DELAY mode If the display indicates closed the DIM is in REM LOW ALM REM HIGH ALM and DOOR DELAY mode SWITCH INPUT changes both alarm and alarm delay when closed If the same alarm or alarm delay is required set both alarms or delays to same value Flow Input Menu Item FLOW INPUT The FLOW INPUT item is used to read the input from the flow station When this item is entered a voltage will be indicated on the display The exact voltage displayed is relatively unimportant It is more important that the voltage is changing which indicates the flow station is working correctly 0 volts displayed equals zero flow 5 volts displayed equals 2832 ft min x duct area ft pressure based flow station 5 volts displayed equals TOP VELOCITY x duct area ft linear flow stations see Configure menu TOP VELOCITY item Low Alarm Relay Menu Item LOW ALM REL
34. m with installed hardware equipment is incorrect wiring This problem usually exists on initial installation or when modifications to the system take place The wiring should be very closely checked to verify it exactly matches the wiring diagram The TSI cables are all color coded to ensure proper wiring A wiring diagram is located in Appendix B of this manual Wiring associated with non TSI components should be closely checked for correct installation If non TSI components are installed consider disconnecting them for testing purposes 28 Part Two Confirming physical installation is correct All of the hardware components need to be installed properly Review the installation instructions and verify components are installed properly at the correct location This is easily done when the wiring is checked Verifying mechanical components Verifying all TSI components are operating correctly requires following a simple procedure The fastest procedure to confirm all equipment is operating is to first test the DIM and then go into the diagnostic menu to test each component NOTE These tests require power to the units so if unit has no power refer to hardware troubleshooting chart to eliminate power problem TEST DIM Press TEST key to verify Digital Interface Module DIM electronics are functioning correctly At the end of the self test the display will show SELF TEST PASSED if all DIM electronics are good If unit displays D
35. n dampers or open door slightly to get both unit and actual pressure to read in same direction both read positive or negative This problem can only occur at very low pressures so slightly changing the balance should eliminate the problem Perform a smoke test to determine pressure direction Select SENSOR SPAN item Position thermal air velocity meter in door opening to obtain velocity reading Press keys until pressure direction and sensor span match thermal air velocity meter and smoke test Press SELECT key to save sensor span Exit menu calibration is complete Sensor Sliding Cover Pressure Sensor Figure 6 Pressure sensor door slid open Flow station pressure transducer zero NOTE Not required for linear flow stations with 0 to 5 VDC output Pressure based flow station Disconnect tubing between pressure transducer and flow station Enter calibration menu Access code is required Select FLOW ZERO to take flow zero Press SELECT key Flow zero procedure which takes 10 seconds is automatic Press SELECT key to save data Connect tubing between pressure transducer and flow station Linear flow station 1 5 VDC output 26 Remove flow station from duct or cutoff flow in duct Flow station must have no flow going past sensor Enter calibration menu Access code is required Select FLOW ZERO to take flow zero Press SELECT key Flow zero proc
36. om for more detailed specifications E D P N 1980272 Rev D Copyright 2010 by TSI Incorporated Printed in U S A
37. or is working correctly 0 volts represents a negative pressure of 0 2 inches H O 5 volts represents 0 pressure 10 volts represents a positive pressure of 0 2 inches 2 Sensor Communications Menu Item SENSOR STAT The SENSOR STAT item verifies that the RS 485 communications between the pressure sensor and DIM is working correctly Sensor error messages do not display on DIM except when SENSOR STAT item is selected The item will display NORMAL if communications are established correctly If problems exist one of four error messages will display COMM ERROR DIM cannot communicate with sensor Check all wiring and the pressure sensor address Address must be 1 Figure 9 SENS ERROR Problem with sensor bridge Physical damage to pressure sensor or sensor circuitry Unit is not field repairable Send to TSI for repair CALERROR Calibration data lost Sensor must be returned to TSI to be calibrated DATA ERROR Problem with EEPROM field calibration or analog output calibration lost Check all data programmed and confirm unit is function correctly Analog Output Menu Item ANALOG OUT 30 The ANALOG OUT item is used to vary the analog output from the SUREFLOW unit When this item is entered a number will be shown on the display indicating the last analog output value The value displayed ranges from 0 to 255 The value 255 corresponds to the lowest voltage current output and 0 corresponds to the highest vo
38. plement will explain the AUX key function Programming Keys Gray with Blue Characters The four keys with blue print are used to program or configure the unit to fit a particular application WARNING Pressing these keys will change how the unit functions so please thoroughly review the manual before changing menu items MENU Key The MENU key performs three functions 1 Provides access to the menus when in the normal operating mode 2 When the unit is being programmed the MENU key acts as an escape key to remove you from an item or menu without saving data 3 Returns the unit to the normal operating mode The MENU key is further described in the Software Programming section of this manual SELECT Key The SELECT key performs three functions 1 Provides access to specific menus 2 Provides access to menu items 3 Saves data Pressing the key when finished with a menu item will save the data and exit you out of the menu item A Y Keys The keys are used to scroll through the menus menu items and through the range of item values that can be selected Depending on the item type the values may be numerical specific properties on off or a bar graph 4 Part One Alarms SUREFLOW monitor has visual red light and audible alarms to inform the user of changing conditions The alarm levels set points are determined by administrative personnel Industrial Hygienists or the facilities group depending on the organization
39. plit into two areas Mechanical operation of the unit and system performance Many external variables will affect how the unit functions so it is critical to first determine if the unit is having mechanical problems i e no display on unit remote alarms don t function etc If problems still exist look for performance problems 1 doesn t seem to read correctly display fluctuates etc The first step is to determine that the system is mechanically operating correctly followed by modifying the configuration to eliminate the performance problems Software Programming Programming the SUREFLOW monitor is quick and easy if the programming keys are understood and the proper keystroke procedure is followed The programming keys are defined first followed by the required keystroke procedure At the end of this section is a programming example NOTE The unit is always operating while programming When a menu item value is changed the new value takes effect immediately after saving the change NOTE This section covers programming the instrument through the keypad and display If programming through RS 485 communications use the host computer s procedure The changes take place immediately upon saving data in the instrument Programming Keys The four keys with blue characters refer to Figure 4 are used to program or configure the unit to fit your particular application Programming the instrument will change how the unit functions
40. programmed to either automatically turn off when the unit returns to the safe range or to stay in alarm until the RESET key is pressed See ALARM RESET User Basics 5 Before Calling TSI This manual should answer most questions and resolve most problems the user may encounter If you need assistance or further explanation contact your local TSI representative or TSI TSI is committed to providing high quality products backed by outstanding service Please have the following information available prior to contacting your authorized TSI Manufacturer s Representative or TSI Model number of unit 8635 M Software revision level Facility where unit is installed First two items that scroll when TEST key is pressed Due to the different SUREFLOW models available the above information is needed to accurately answer your questions For the name of your local TSI representative or to talk to TSI service personnel please call TSI at U S AND CANADA OTHER COUNTRIES Sales amp Customer Service Sales amp Customer Service 800 874 2811 651 490 2811 001 651 490 2811 651 490 3824 001 651 490 3824 SHIP MAIL TO E MAIL TSI Incorporated answers tsi com ATTN Customer Service 500 Cardigan Road WEB SITE Shoreview MN 55126 www tsi com USA 6 Part One PART TWO Technical Section The SUREFLOW monitor is ready to use after being properly installed The pressure sensor is factory calibrated prior to shipp
41. r latched or unlatched If unlatched is selected the alarms automatically turn off when the value slightly exceeds the alarm set point If latched is selected the alarms will not terminate until the pressure exceeds the alarm set point and the RESET key is pressed There is a programmable ALARM DELAY and optional DOOR DELAY that determines how long to delay before activating the alarms This delay affects all pressure and flow alarms The door delay is active when switch input pins 11 and 12 is closed The MUTE TIMEOUT item temporarily turns the audible alarm off for all pressure and flow alarms ALARM CONSTRAINTS continued 8 The display can only show one alarm message Therefore the controller has an alarm priority system with the highest priority alarm being displayed If multiple alarms exist the lower priority alarms will not display until after the highest priority alarm has been eliminated The alarm priority is as follows 81 Pressure sensor low alarm Pressure sensor high alarm Flow station minimum flow Data error 9 The low and high alarms are absolute values The chart below shows how the values must be programmed in order to operate correctly 0 2 inches H O 0 0 2 inches H O maximum negative maximum positive High Low Zero Low High Negative Negative Positive Positive Alarm Alarm Alarm Alarm The value of each set point or alarm is unimportant except for small dead band in graph above It is important to und
42. so thoroughly review the items to be changed MUTE A TEST RESET SELECT Figure 4 Programming Keys MENU Key The MENU key has three functions 1 The MENU key is used to gain access to the menus when the unit is in the normal operating mode Pressing the key once will exit the normal operating mode and enter the programming mode When the MENU key is first pressed the first two menus are listed 2 When the unit is being programmed the MENU key acts like an escape key e When scrolling through the main menu pressing the MENU key will return the unit to standard operating mode e When scrolling through the items on a menu pressing the MENU key will return you to the list of menus e When changing data in a menu item pressing the MENU key will escape out of the item without saving changes 3 When programming is complete pressing the MENU key will return the unit to normal operating mode 8 Part Two SELECT Key The SELECT key has three functions 1 The SELECT key is used to gain access to specific menus To access a menu scroll through the menus using arrow keys and place the flashing cursor on the desired menu Press the SELECT key to select the menu The first line on the display will now be the selected menu and the second line will show the first menu item The SELECT key is used to gain access to specific menu items To access a menu item scroll through the menu items until item appears Press t
43. the V key until HIGH ALARM is shown on display Menu selected Item name Press the SELECT key to access the high alarm set point The item name HIGH ALARM will now be displayed on line 1 and the item s current value will be displayed on line 2 Item Name Current Value Press the key to change the high alarm set point to 0 003 inches H5O Press the SELECT key to save the new high alarm set point PRESSURE 00085 H20 CONFIGURE SELECT SELECT 00200 H20 HIGH ALARM 00300 H20 SELECT I E gt z r eo gt gt gt I I 20 20 20 gt p gt gt gt gt gt 29 Part Two Three short beeps will sound indicating HIGH ALARM that the data is being saved Saving Data Immediately after the data is saved the ALARM SUREFLOW monitor will return to the HIGH ALARM menu level displaying the menu title on the top line of the display and the menu item on the bottom line goes to step 3 If the MENU key was pressed instead of the SELECT key the new data would not have been saved and the SUREFLOW monitor would have escaped back to the menu level shown in step 3 Press the MENU key once to return to the menu level ALARM CONFIGURE Press the MENU key a second time to return to the normal operating level Unit is now back in normal PRESSURE operation 00085 H20 Big Technical Section 11 Menu and Menu Items The
44. the opposite direction of the REM LOW ALM set point This item is enabled when the SWITCH INPUT contact closure pins 11 and 12 is closed or the RS 485 communications sends a command The REM HIGH ALM item sets a remote or second high pressure alarm set point A high alarm condition is defined as when the magnitude of the room pressure rises above the REM HIGH ALM set point This item is enabled when the SWITCH INPUT contact closure pins 11 and 12 is closed or the RS 485 communications sends a command ITEM RANGE OFF 0 to 0 19500 0 to 0 19500 H20 OFF 0 to 0 19500 0 to 0 19500 H O OFF 0 to 0 19500 H O 0 to 0 19500 H20 OFF 0 to 0 19500 H O to 0 19500 DEFAULT VALUE OFF OFF OFF OFF 0112 5 021 ST MINIMUM MIN FLOW FLOW ALARM ALM ALARM RESET ALARM RESET AUDIBLE AUDIBLE ALARM ALM ALARM ALARM DELAY DELAY The MIN FLOW ALM item sets the duct s flow alarm set point A minimum flow alarm is defined as when the duct flow is less than the MIN FLOW ALM set point Flow station can be mounted in either the supply or exhaust duct Flow station is optional NOTE The DUCT AREA configure menu must be entered before a MIN FLOW ALM can be programmed The ALARM RESET item selects how the alarms terminate after the unit returns to the safe pressure range pressure or flow UNLATCHED alarm follow automatically resets the alarms when the unit reaches
45. the safe pressure range LATCHED requires the staff to press the RESET key after the unit returns to the safe pressure range The ALARM RESET affects the audible alarm visual alarm and relay output which means all are latched or unlatched The AUDIBLE ALM item selects whether the audible alarm is turned ON or OFF Selecting ON requires the staff to press the MUTE key to silence the audible alarm Selecting OFF permanently mutes all audible alarms The ALARM DELAY determines the length of time the alarm is delayed after an alarm condition has been detected This delay affects the visual alarm audible alarm and relay outputs An ALARM DELAY prevents nuisance alarms from people entering and leaving the laboratory The ALARM DELAY is enabled when the SWITCH INPUT contact closure pins 11 and 12 is open or the RS 485 communications sends a command OFF Pressure based flow stations 0 to 2832 ft MIN times the duct area in square feet f Linear based flow stations 0 to TOP VELOCITY times the duct are in square feet ft LATCHED OR UNLATCHED ON or OFF 20 to 600 SECONDS OFF UNLATCHE D ON 20 SECONDS 9T OM Wed ALARM MENU MENU ITEM DOOR DELAY MUTE TIMEOUT ACCESS CODE SOFTWARE NAME DOOR DELAY MUTE TIMEOUT ACCESS CODE ITEM DESCRIPTION ITEM RANGE The DOOR DELAY item is an alarm delay used when the door will be 20 to 600 SECONDS open for an extended period of time The DOOR DE
46. turned on so enter proper access code All menu items described below are found in CALIBRATION menu Elevation The ELEVATION item eliminates pressure sensor error due to elevation of building See ELEVATION item in Menu and Menu items section for further information Enter the ELEVATION menu item Scroll through the elevation list and select the one closest to the building s elevation Press the SELECT key to save the data and exit back to the calibration menu Sensor zero Slide open pressure sensor door and tape over 1 2 inch sensor orifice see Figure 6 Make sure pressure sensor orifice is taped over Sensor is located about 3 4 into housing Select SENSOR ZERO item Press SELECT key Sensor zero procedure which takes 120 seconds is automatic Press SELECT key to save the data Remove tape from sensor orifice and close pressure sensor door Sensor span NOTE Always take a sensor zero prior to adjusting the sensor span smoke test and a comparison measurement by an air velocity meter are required to calibrate the pressure sensor The air velocity meter only gives a velocity reading so a smoke test must be performed to determine pressure direction Technical Section 25 WARNING The span can only be adjusted in the same pressure direction Adjusting span cannot cross zero pressure Example If unit displays 0 0001 and actual pressure is 0 0001 do not make any adjustments Manually change the air balance close or ope
47. u DEFAULT VALUE 20 SECONDS 5 MINUTES OFF jpoiut 2a LI END OF The END OF MENU item informs the user that the end of a menu MENU has been reached The user can either scroll back up the menu to make changes or press the SELECT or MENU key to exit out of the menu ALARM CONSTRAINTS There are a number of constraints built into the software that prevent users from programming conflicting alarm information These are as follows 1 Remote alarms The remote alarms are only active when the switch input pins 11 and 12 is closed When the remote alarms active the standard alarms are turned off The SUREFLOW monitor is programmed not to allow the pressure alarms to be programmed within 40 ft min 0 00028 H O at 0 001 H5O of each other Example The LOW ALARM set point is 0 00072 H20 The HIGH ALARM set point cannot be set lower than 0 00128 The alarms both standard and remote can be programmed for positive or negative pressure However both the low and high alarm must be set either positive or negative The DIM does not allow one positive alarm and one negative alarm Alarms do not terminate until the pressure exceeds the alarm set point The alarm set point must be slightly exceeded before alarm will terminate The ALARM RESET item selects how the alarms will terminate when monitor returns to the safe range The pressure and flow alarms all terminate the same they are eithe
48. ure conditions cannot be satisfied the green light turns off and the red alarm light turns on Operator Panel A cover hides the operator panel Sliding the door panel to the right exposes the operator panel Figure 2 Digital Display The alphanumeric digital display is a two line display that indicates actual room pressure positive or negative alarm status menu options and error messages In normal operation green light is on the display continuously scrolls information about room pressure and other variables programmed flow air changes per hour etc The variables that scroll depend on the options installed As an example if an alarm condition occurs the variable that normally scrolls STANDARD STANDARD NORMAL will change to read ALARM will state type of alarm low pressure high pressure flow NOTE When switch input pins 11 amp 12 is closed the word standard is replaced with remote on display When programming the unit the display will change and now show menus menu items and current value of the item depending on the specific programming function being performed Keypad The keypad has six keys The gray keys with black letters are user information keys In normal operation these keys are active The gray keys with blue characters are used to program the unit The red emergency key has no function on the monitor and has been disconnected A thorough description of each key is given below User Basics 3
49. with the physical installation of the device Hardware problems include wiring problems incorrectly installed equipment and add ons or non TSI equipment Software problems include configuration problems or interaction problems with the HVAC system The hardware test described in this section determines that all TSI mechanical components are functioning correctly The hardware test requires the diagnostics menu items to be accessed If you are unfamiliar with the SUREFLOW monitor menus see Software Programming for keystroke procedure Troubleshooting the majority of problems is usually quick if the hardware test is followed Software and hardware problems are covered in the troubleshooting chart Pick the problem that most closely resembles your problem and review the possible symptoms and corrective action Software or system performance problems can and are affected by the supply air system exhaust air system or physical configuration of the room Separating TSI system problems from the HVAC system can sometimes be difficult TSI recommends confirming all hardware is operating correctly before troubleshooting software problems Hardware Test Three tests need to be performed in order to determine all hardware is functioning correctly The tests are broken down into e Confirming wiring is correct e Confirming physical installation is correct e Verifying mechanical components Confirming wiring is correct The most common proble
50. wo Specifications Room Pressure Module Dis play Range Resolution Display Update Inputs Switch in Flow in Outputs Low Alarm Range High Alarm Range Alarm Contacts Analog Output Operating Temperature 0 20000 to 0 20000 inches H O 5 of reading 0 5 sec SPST N O Switch Closing switch initiates condition 0 to 5 VDC 0 19500 to 0 19500 inches H O 0 19500 to 0 19500 inches H O SPST N O Max current 5A max voltage 150 VDC 250 VAC Maximum switch load 10 mA 5 VDC Contacts close in alarm condition 0 to 10 VDC or 4 to 20 mA High 0 100 to 0 100 inches H O Low 0 0100 to 40 0100 inches HO 1 0 of range for 0 10 VDC 1 2 of range for 4 20 mA 32 to 120 F Input Power 2 5 r e e a ea sees 24 VAC 5 watts max DIMENSIONS E 4 9 in X 4 9 in X 1 35 in Weights donee ERU 0 7 Ib Pressure Sensor Temperature Compensation 55 to 95 F Power Dissipation 0 16 watts at 0 inches H O 0 20 watts at 0 00088 inches HO Dimensions DxH essen 5 58 in X 3 34 in X 1 94 in Wight aei ERU RR UE 0 2 Ib 35 36 This page intentionally left blank Appendix A Wiring Information Back Panel Wiring m __ ____ Input Output Communication Description Input 24 VAC to power Digital Inter
Download Pdf Manuals
Related Search