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Manuals - Tek-Air Systems, Inc.

1. ISO TEK Space Pressurization Monitor N OUT Set amc Pont Mute E decir NOTE Connection Diagram Wires shown separate for clarity Digital Display 2 conductor wire should come attached to pre made cable 0 0 0 Transmitter Display Tool Connection Cable Eom S o 1 2 ba Alarm Cal High Low Adj MUN LL Hgh low GND Alarm Setting Test Terminals Off 25 Mode Installation Mounting Diagram Room Display Module i NOTE LCD CONNECTION NOT PROVIDED ON 2100 Mounting Bracket wiring for SPM 2100 amp 2200 fig 1 8 o By Oth WITH BOTH COVERS REMOVED Cable amp Indicator Wires to Transmitter Utility Box ers Unit can be respanned using potentiometers on back of unit if the range of the SPM transmitter is to be changed in the field AFTER shipment from the factory Otherwise the LCD is factory
2. NO If It is Acceptable to Leave Door Open This Long Extend Delay Period Is Pressure Magnitude and Direction NO as Determined With an Anemometer and Smoke Stick Correct and Within Limits at Time Alarm is Observed Check Causes Lack of Supply or Exhaust YES Supply Exhaust Differential Door Fit Poor Large Cracks Around Door Is Monitor Set Up Correctly Refer Windows Leak To Troubleshooting Flow Chart Titled Monitor Continuously in Alarm NOTE Having An Adequate Differential Between Supply and Exhaust Air Does Not Guarantee YES Adequate Pressure Levels YES Does the Alarm Happen At the Same Time Each Day Check Start Stop Times NO of Scheduled Air Handling Equipment YES or Night Setback Routines Are There Extreme Weather Conditions Like Wind When Alarm is Observed NO Check Windows for Adequate Sealing and Caulking Contact Tek Air Service Department 203 791 1400 Have the following information available Switch settings used Condition of display lights Observed pressure or FPM Observed direction of airflow High and Low Alarm settings in volts Observed 4 20mA reading Software version from transmitter Tek Air job facility name and location ISO TEK 5 4 Release 3 0 APPENDICES APPENDIX A APPENDIX A SETUP VOLTAGE CHARTS DVM Readings Feet per Minute Scales Inches Wat
3. POINT Pressure Level amp Alarm Status Indicators High Measurement STATUS Indicator Low Measurement Indicator Alarm Horn Silence Button Press to Silence Alarm Horn SPM 2100 ISO TEK Display Figure 2 2 Front View ISO TEK Space Pressurization Monitor OUT Set Point sinew cauli SPM 2200 ISO TEK Display 2 5 Release 3 0 Chapter 3 Product Philosophy Warning This product contains components that are Electrostatic Discharge Sensitive ESD Do not handle or remove the PCB assembly from the enclosure CHAPTER GOALS This chapter is intended to familiarize the user with the capabilities and theory of operation of the ISO TEK SPM 2000 2100 2200 This chapter should be read prior to commissioning the unit A PRODUCT GOALS AND EXPECTATIONS The 50 has been designed to continuously monitor the extremely small air pressure differences between two spaces The unit will provide reliable monitoring and alarming when installed and commissioned properly Principal reasons for using the product include To continuously monitor the direction and rate of the transfer of air be tween two spaces typically a room and its adjacent hallway in either Feet Per Minute FPM or in inches of water column wc To alert employees and staff to changes in the status of airflow between the two spaces which may have an impact on
4. Depending on your particular installation tools to cut wallboard or cinder block will also be required For the setup of alarms a DC voltmeter will be required D MATERIALS A 4 x 4 utility box on which the display module SPM 2100 amp 2200 only will mount is required Mounting hardware for the utility box is not included ISO TEK 1 1 Release 3 0 Chapter 1 Installation E UNPACKING Remove the packing materials from the top of the carton and lay out the SO TEK Space Pressurization Monitor on a clean work space The following components should be found in the carton Transmitter Module one metallic enclosure containing the main circuit board and pressure sensor tubing connections electrical terminations and data line receptacle Display Module SPM 2100 amp 2200 only one metallic enclosure with color coded display lights and a square alarm push button on the front A back bracket and screws should be included with the display Data Cable SPM 2100 amp 2200 only One twenty foot long data cable with 8 pin RJ 45 phone type jacks on both ends Room amp Reference Probes Two 2 nylon bulkhead fittings each with in tegral filter and two stainless steel vanity wall plates or optional ceiling plates Power Transformer Option One 120 to 24VAC 40 VA transformer pro vided only if specifically ordered Will power up to four SO TEks 1 2 OD Tubing Two 15 foot lengths of plenum rated tubing one so
5. ISO Tek SPACE PRESSURIZATION MONITOR SPM 2000 SPM 2100 amp SPM 2200 SERIES INSTALLATION OPERATION amp MAINTENANCE MANUAL RELEASE 3 0 MAY 2005 SOFTWARE VERSIONS TRANSMITTER E 15 DISPLAY C 5 SETUP TOOL B 11 TEK AIR SYSTEMS 41 EAGLE ROAD DANBURY CT 06810 TEL 203 791 1400 FAX 203 798 6534 WWW TEK AIR COM ATTENTION READ THIS PRIOR TO PROCEEDING FURTHER 1 This manual is designed to provide the user with an in depth understanding of the ISO TEK product and its application However simplified instructions are also provided for those who want to jump right in and get the product installed and operating If you are in a hurry read Chapter 1 Installation and Chapter 2 Quick Start Setup If you have some understanding of measurement instrumentation and its application these instructions should be all that you need to get an ISO TEK up and running If you want to get an in depth understanding of the product and its application before proceeding with the installation first read Chapter 3 Product Philosophy Next read Chapter 4 Setup and Adjustment When you are ready to install the product go back to Chapter 1 Chapter 2 Quick Start Setup need not be used although it will provide a handy reference once you are familiar with the product WARRANTY Tek Air Systems Inc warrants that this product under normal use and service as described in this Operation and Service manual is free from defects in workmansh
6. 004 a typical high setting If the room is to be set for neutral pressurization only the low alarm is active Determine the setup voltage from the Table 1 in Appendix A As an example find the voltage for 100 FPM with a full scale range of 500 FPM From the table find the 500 column in the Feet per Minute Scales Move down to find the low value of 100 FPM and note that 1 0 volt is shown in the Alarm Voltage column Determining the appropriate alarm voltage for neutral rooms differs from the negative and positive rooms in that only the low alarm setting is used The low alarm setting then triggers an alarm on either side of the neutral point so if the unit were calibrated for a low alarm of 150 FPM any time the flow exceeded 150 FPM in either direction the low alarm would trigger Connect the common lead of the voltmeter to the GND test point under the adjustment marked Cal Adj on the back of the display module Refer to Figure 4 3 on the next page Connect the plus lead of the voltmeter to the test point marked Low Set the voltmeter for DC volts and read the voltage Adjust the potentiometer marked Alarm Low until the voltmeter reads the voltage indicated on the chart given the selected units and full scale To adjust the High Alarm setting move the positive lead of the voltmeter to the test point marked HIGH Set the voltmeter for DC volts and read the voltage Adjust the potentiometer marked Alarm High until the voltm
7. the updated or refreshed data 2 Thelso Tek specification indicates for the configuration setup transfer variable which controls units a value of 1 indicates FPM and a value of 0 is invalid The current firmwareallows a value of zero to be written to this transfer variable however all readings reported over the network N2 and Open continue to indicate in units of FPM 3 Alarm Latching Affects reported BI alarms status indications This feature can lead to some confusing indications from the N2 variables To understand the behavior it is first necessary to know the alarm violation status is reported in two places First Al 1 room air transfer has a status attribute with bits for indicating hi lo alarm violations Second BI 1 and BI 2 are individual indications of the alarm violation status The BI parameters are the simplest to understand If an alarm violations occursand alarm latching is on the associated BI will change to active 1 to indicate that the alarm has occured The BI will not return to the inactive 0 state until the alarm has been acknow ledged even if the parameter is no longer in violation If alarm latching is enabled it is therefore possible for a high alarm to occur setting Bl 1 to active followed at some later time be a low alarm setting 2 to active This will result in both the hi lo alarm status indications 1 2 being simultaneously active When the alarm condition s are acknowledged if th
8. APPENDICES APPENDIX D DISPLAY TRANSMITTER SOFTWARE COMPATIBILITY WARNING Display and Transmitter Software Version Compatibility Are Important The standard SPM 2100 display transmitter and tool are microprocessor based prod ucts and require that their software version levels be compatible in order to function properly Software version updates are generally provided to incorporate feature en hancements in the product The version number for the transmitter can be determined by opening the transmitter cover and looking at the tag on an electronic chip located in close proximity to the flash ing activity indicator see figure 4 1 The software version of the display can be found in the upper right hand corner of the rear of the display see figure 2 1 Incompatibility of software versions should only be a problem in situations where spare displays and transmitters are stocked as repair parts or where a customer has several generations of product in his facility In situations where an incompatibility exists either the display or the transmitter program chip can be changed to match the version of it s companion part It is generally simpler to replace the display chip because the transmit ter typically must be recalibrated after a change Contact Tek Air Service if you suspect an incompatibility problem The following software versions must be used together Product Series Transmitter Display Release Date Tool SPM 5000 B 2 B 0
9. Goals and Expectations 3 1 B Overall Operation and Theory pp 3 2 Sensor Principle or Operation pp 3 3 D Transmitter FUNCIONS 5 3 4 Desired Airflow Polarity aerae tror otro etn 3 4 Desired Measurement Units 3 5 Desired Range of Operation pp 3 5 Alara 3 6 Time Delay Period pp 3 7 Alarm ete E 3 7 Deactivation of Audible Alarm 3 7 Remote Polarity Setting or Muting pp E Displ y Operaatio eR E SUI ITI AN ING E 4 Setup and Adjustment A Mi B Establish Configuration Parameters C Set Configuration Parameters Ber enc Mode Selection Setting the Range Calibrating Alarm Parameters Determine Room Pressure pp Adjust the Transmitter Zero Adjust the Transmitter Calibration 5 Troubleshooting Guide Display does nol work ppp Il Setpoint Indicators Flash pp Alarm light flashes Other indicators are off IV All Status Indicators Flas
10. Indicators POINT Neutral Status Indicator OUT High Measurement Indicator _ High Measurement STATUS Indicator Low Measurement Indicator Low Measurement Indicator Alarm Status Indicator Blinks when room is in alarm Alarm Horn Silence Button 4 5 x4 5 x1 Case Press to Silence Alarm Horn Room Display Module Figure 3 8 E DISPLAY OPERATION A display is normally used with the transmitter Three amber Set Point indicators are provided on the display face one of which will be lit based on the desired direc tion of airflow and pressurization level The lit setpoint indicator will flash periodically to provide a visual indication that the monitor system is functioning properly Refer to Figure 3 8 above The Status indicators provide a visual indication of the level of pressurization These dual colored light emitting diodes LEDs indicate status with the color green for anormal condition and red for an alarm When the pressurization level is normal the green normal status indicator located directly under the yellow set point indicator will be lit Should the pressure level decrease or increase outside of the preset alarm limits the green indicator light will turn off and the indicator to the left or right of the normal light will turn red accordingly These indicator lights change immedi ately in response to changes in space pressure See Figure 3 9 and 3 10 for s
11. Release 3 0 APPENDICES INSTALLATION The Mini Display has the footprint of a light switch cover plate mounts with two screws protrudes less than one half inch from the wall and has a beige finish The display is designed to be mounted on a standard 2 x4 electrical handi box and requires no special mounting accessories or tools If the user wishes to connect the SPM 7000 Setup Tool at the Mini Display an appropriate length DSPC cable is required see Model Code info The distance between the ISO TEK transmitter and the Mini Display is limited to 100 feet max If the user intends to connect the SPM 7000 Setup tool at the trans mitter rather than at the display the tool connection cable is not required and the distance between com ponents can be extended to five hundred feet MINI DISPLAY ISO TEK TRANSMITTER TERMINATIONS TUNE ENABLE TERMINATIONS JUMPER RS 485 RS 485 4 20 output 4 20 output 24VAC 24VAC RELAY IN Remote SW Remote SW cmn Remote SW RELAY OUT Open on alarm Relay common Close on alarm SH SSSSSSSSSSSSSS ALARM TO BAS 24VAC 24VAC 24 AWG BY USER MAX 100ft DSPC CABLE MAX 100ft ISO TEK Mini Display Wiring Diagram For more information on the Iso
12. a romex type squeeze connector to provide strain relief Plug the cable into the female recep tacle provided inside the transmitter Mount the Display Bracket SPM 2100 amp 2200 only Mount the bracket for the display module on the utility box installed in step 7 Use either two or four screws provided and the appropriate mounting holes on the back of the bracket to secure it onto the 4 square utility box you installed in Step 1 The U shaped sides of the bracket should be facing toward you and the large square hole in the bracket should be facing toward the top 10 Set the Display Module Configuration Switches SPM 2100 amp 2200 only Re view the settings of the configuration switches on the rear of the display module The unit will operate with factory settings but you may wish to change these NOTE The configuration of the ISO TEK unit determines how it functions and which features will be activated Configuration settings are usually established by the operating staff Refer to Chapters 2 3 amp 4 in this manual for details on configuring the unit ISO TEK 1 6 Release 3 0 Chapter 1 Installation 11 Mount the Display Module SPM 2100 amp 2200 only Fold the display cable ina zigzag manner to allow it to push back into the utility box Plug the male connec tor on the end of the display cable into the female connector on the display mod ule Carefully mount the display on the bracket and secure with the two 1 16 hex
13. and Low test points Using the appropriate Units and Full Scale configurations compare this voltage to Table 2 1 below to determine either the FPM or inches water to which the room is pressurized Re member to set the Low alarm adjustment back to the desired voltage when done and return the Mode switch to Operational DVM Readings Feet per Minute Scales Inches Water Scales em so Voltage Nenas Positive Ero AE A o25 1160 i240 5 13 25 so 0 00025 00005 0 0050 150 9 60 1440 75 150 0 00030 0 00150 0 0080 0 0300 00 720 1680 150 0 00060 0 00300 0 0060 0 0600 75 1800 75 188 375 750 000075 0 00375 0 0075 0 0750 400 560 1840 so 200 400 0 00080 0 00400 0 0080 0 0800 450 4 80 1920 90 225 450 900 0 00090 0 00450 0 0090 0 0900 Alarm Setup Voltages Table 2 1 ISO TEK 2 4 Release3 0 Chapter 2 C DISPLAY FUNCTIONS Quick Start Setup Figure 2 2 below indicates how to interpret the display indicators Desired Airflow Direction Indicators Neutral Status Indicator High Measurement Indicator Low Measurement Indicator Alarm Status Indicator Blinks when room is in alarm 4 5 x4 5 x1 Case LCD Indicator Also Available in FPM ISO TEK ISO TEK SPACEPRESSURIZATIMONITOR OUT SET
14. being used Deactivation of Audible Alarm Where a display module is used it may be desirable to deactivate the alarm horn built into the display A common application would be in a patient isolation room where the transmitter is wired back to a nurses station alarm panel Activating the horn at the display might disturb the patient Even with the horn deactivated the local display will still provide the visual alarm indication required for the protection of staff Remote Polarity Setting or Muting The SO TEK transmitter provides the capability of connecting external switches or buttons to remotely control how the unit operates The transmitter can be configured so that wiring a multi position switch to the re mote selection inputs allows the external switch to index the desired polarity from another location This is useful in applications where the room might be switched from negative pressure to positive pressure depending on the requirements of the room The unit can also be placed in the standby mode if desired ISO TEK 3 7 Release 3 0 Chapter 3 Product Philosophy The transmitter can also be configured so that wiring a momentary push button to one of the remote selection inputs provides a method to remotely silence the alarm horn or reset the alarm contacts Refer to Chapter 1 for wiring details Desired Airflow Direction Indicators ISO TEK SPACEPRESSURIZATIGHONITOR Pressure Level amp Alarm Status SET
15. feature is contained in Chapter 3 A re mote switch is typically connected as shown in Figure 1 4 Polarity Selector Mn Switch T 10 e Standby 10 TO DEUM Positive eer Remote Polarity Remote Mute All Software Versions Remote Function Selection Figure 1 4 Remote Communications Link Terminals 1 and 2 provide for a direct digital con nection to a remote personal computer or building automation system The SPM Iso Tek 2000 transmitter is capable of digital communications on an RS 485 two con ductor network cable at 9600 baud Up to 255 units can be addressed on one net work Two communications protocols are available to the user Tek Air Open Proto col and JCI N2 Protocol In both cases the SPM 2000 IsoTek can share the net work with Tek Air s FVC 2000plus Fume Hood Controllers Open Protocol allows the SPM 2000 IsoTek Transmitter to interface the Honeywell Excel system NOTE N2 panel Protocol is a direct connection to N2 buss open protocol requires adapter de vice Tek Air will make the Open Protocol available to any control system manufacturer Connections should be made using 24AWG twisted shielded cable as shown in Figure 1 5 Shields should be tied together and only be grounded at one end The last unit on the communication lone should have the jumper on P6 to the T posi tion All units in the middle of the comminications line
16. in either direction until the output of the SO TEK agrees with the thermal anemometer CAUTION Using thermal anemometers correctly requires care skill and the proper technique At low ISO TEK 2 2 Release3 0 Chapter 2 Quick Start Setup flows these instruments are typically no better than 10 of reading Therefore this adjustment should not be made to trim slight variations within 10 between de vices Switch B 5 Remote Option In many instances it is desirable to interface the 50 to either a remote mute or polarity indexing switch A remote mute switch allows the use of an external contact closure to silence the audible alarm horn The polarity switch indexes the airflow controls in the supply and exhaust serving the room providing either positive negative or neutral pressurization For units with Rev D 00 or later transmitter software with switch B 5 set to Mute shorting terminals 10 and 11 momentarily will cause an activated alarm horn to silence With switch B 5 to Polarity ISO TEK can be indexed via a remote switch to either the negative neutral or positive mode of operation to match the needs of the room The unit can also be placed on standby For details refer to the wiring diagram in Figure 1 4 in Chapter 1 Installation Switch B 6 Units This switch allows the user to set the output of the SO TEK for either inches of water column or feet per minute Both are acceptable for the proposed Federal
17. matched to the factory settings of the SPM transmitter and need not be adjusted ISO TEK Release 3 0 Chapter 2 QUICK START SETUP Quick Start Setup Warning This product contains components that are Electrostatic Discharge Sensi tive ESD Do not handle or remove the PCB assembly from the enclosure CHAPTER GOALS The following instructions are designed only to provide an overview of the device for room pressure monitoring For complete and detailed instructions refer to Chapters 3 and 4 Setup of this device is extremely simple performed through configuration switches and adjustments on the rear of the display module Refer to Figure 2 1 Alarm High Low High Low GND 8 1 9 9 v Z L 8 7 9 S v For SPM 2100 and 2200 models only units are normally configured in the field Tek Air will configure them at the factory to users require ments if the desired settings are specified Otherwise the following default settings are used Alarm Setting Mode Operational Test Terminals Alarm Tone Yes Polarity Negative SUIS Alarm Delay 30 sec Pressure 010 in H O SMIENB Flow 500 ft min Latche
18. one stain less steel plate Standard 1 2 OD diameter tubing is utilized to connect the probes to the transmitter enclosure and can be purchased from Tek Air Refer to Figure 1 7 Each probe is normally installed in the wall roughly16 to center above the floor one in the corridor reference and one in the room to be measured Tek Air does not nor mally recommend mounting the reference probe in an anteroom Refer to Appendix B for technical explanation Probes must be mounted several feet from any sources of air turbulence such as registers grilles or diffusers The length of tubing used to con nect each sensor need not be the same but the combined length of tubing should not exceed 50 feet CAUTION Reference probes must not be shared between multiple SO TERS 1 2 O D TUBING TO TRANSMITTER METAL BUSHING STAINLESS STEEL E x INSERT 1 2 ELBOW FITTING USE MOUNTING HARDWARE PROVIDED Room and Reference Probe Installation Figure 1 7 ISO TEK 1 5 Release 3 0 6 Chapter 1 Installation Install Sensor Tubing Install the 1 2 OD control tubing used to connect the room and reference probes to the transmitter Make sure that there are no kinks or sharp bends in the tubing Tek Air suggests using tubing in two different colors for ease of installation Insert metal tube inserts into both ends of tubes Starting at the transmitter fitting marked
19. should be placed in the Operational position Switch B position 4 labeled Cal Adjustment should be placed in the Off position The use of these switches will be covered later in this chapter D CALIBRATION The following paragraphs explain the method by which the SO TEK is calibrated For a detailed description of how each of the alarm settings operates refer to Chapter 3 section D Mode Selection Calibration of alarm constants can be accomplished with switch A 1 set for either Operational or Setup In the setup mode the transmitter oper ates normally except that the time delay associated with alarm actuation is deacti vated so that alarms come in immediately as they occur Setting the Range Initially set switches A 4 and A 5 for a full scale value of either 005 inches of water or 500 FPM as these ranges encompass the pressure levels typically found in most rooms Air tight rooms may sustain higher pressures or velocities than leaky rooms Calibrating Alarm Parameters Using a voltmeter alarms are calibrated in the following manner Having set each of the DIP switches listed above note the set tings for Full Scale range and Units Determine the High Alarm and Low Alarm settings to be used in the appropriate units For positive and negative rooms using velocity 100 FPM is a typical low alarm point and 225 a typical high point unless the room is very tight A typical low setting using pressure is 0 001 and
20. their safety and health However the 50 provides many more features which benefit the user Among these are Extremely sensitive measurement capabilities velocities as low as 20 FPM and pressures as low as 0 0001 wc e Visual assurance of safety to workers via a simple intuitive display The simplicity of the display insures that the time required to train staff is minimized Awide range of configurable features providing the user with the free dom to configure the operation of the monitor to match special applica tion requirements Usable with or without local display module e Simple installation and setup No large penetrations between spaces are required Multiple interface paths to other building systems such as building automa tion data acquisition and nurse call systems Interface can be accom plished through analog signals contact closures and digital communications High reliability through the use of state of the art sensing and circuitry Low maintenance due to inherent simplicity ISO TEK is designed to be used in a wide variety of applications from hospital isola tion rooms to chemical laboratories The sensing system is specifically designed for rooms where pressure levels are so low that they can t be reliably measured by conventional diaphragm sensors ISO TEK can be provided in two configurations to meet the user s specific needs The SPM 2100 is a complete system consisting of a transm
21. xx Ga Da baa 1 1 1 2 F Installation ba tne tet tum pax ex Ex ER 1 2 1 Locate and Mount the Transmitter 1 2 2 Locate and Mount the Power Transformer 1 3 3 Run Power Wiring menie rne nebat piece 1 3 4 Connections to Remote Interface Devices 1 3 Alarm Contact Outputs pp 1 4 Remote or Mute Function Selection 1 4 Remote 1 4 Analog QUMUN 1 5 5 Locate and Mount Room Probe and Reference Probe 1 5 6 Install Sensor Tubing pp 1 6 7 Install Rough in Utility Box for the Display 1 6 8 Pull and Connect the Display Cable 1 6 9 Mount the Display 1 6 10 Set the Display Module Configuration Switches 1 7 11 Mount the Display Module pp 1 7 12 Double Check All Connections 1 7 13 Power Up Unit m 1 7 14 CPC 1 7 Display w LGOD pp 1 8 2 Quick Start Setup A 2 1 MEG ec PTT SETS 2 3 C Display FUNCIONS Ese Ein een ho eee ctt Ra eic 2 5 3 Product Philosophy A Product
22. 0 to 4095 seconds is 0 to 4095 counts 12 Not used 13 R Communications status 0 is normal 1 to 255 is the number of failed attempts Configuration Setup details A four digit code defining the setup of the monitor Thousands digit Polarity 1 positive 2 negative 3 neutral 0 standby off Hundreds digit Full Scale 1 100 fpm 2 250 fpm 3 500 fpm 4 1000 fpm 001in H2O 005in H2O 01 in H2O H2O Ten digit Acknowledge Function 0 is not latched 1 is latched Ones digit Units 0 in H20 1 fpm The monitor can be connected to a Gateway in parallel with FVC 2000 s Note 1 Setting the hi alarm limit to the value equivalent to or above the full scale magnitude or setting the low alarm limit to 2047 will disable the alarm feature Note 2 order to Write an acknowledge to Transfer Variable 8 a 1 must be written This will be read back as a 0 This location should then immediately be written with a O to prepare for the next alarm event The acknowledge will continue to be reported correctly as a 0 until the alarm condition clears Note 3 operate as a Transmitter only no display the Monitor must be in Display Override this operating configuration is factory set per model code ordered SPM 2000 Configured this way the monitor still could have an IMD 5000 Mini Display connected or even a full Display like SPM 2100 However while the Transmitter will continue to write to a full Di
23. 1 26 94 N A SPM 5000 B 43 B 1 2 16 94 N A SPM 5000 B 51 B 2 3 23 94 N A SPM 5000 B 61 B 2 4 8 94 N A SPM 5000 C 60 C 3 6 22 94 B 04 SPM 5000 C 14 C 4 2 12 95 B 06 SPM 5000 C 18 C 4 5 19 95 B 08 SPM 5000 D 00 C 4 12 1 95 B 09 SPM 5000 D 02 C 4 8 15 96 B 09 SPM 5000 D 02 C 4 9 10 96 B 10 SPM 5000 D 02 C 4 12 14 98 B 11 SPM 5000 D 02 C 5 4 20 99 B 11 SPM 2000 E 15 C 5 12 1 99 B 11 ISO TEK A 5 Release 3 0 APPENDICES APPENDIX E COMMUNICATION TRANSFER VARIABLES FOR TEK AIR OPEN PROTOCOL Parameters available for communication to a host system Read or TV Write Description 0 R Room air pressure or velocity 1000 1 to 1000 1 is 0 to 4095 counts 2047counts neutral 1 Pressure or velocity set point scaled same as 0 reserved for future controller 2 Controller output 0 to 100 is 0 to 4095 counts reserved for future controller 3 R W High transfer Alarm set point scaled the same as 0 4 R W Low transfer alarm set point scaled the same as 0 5 R High transfer Alarm 1 is alarm 0 is not in alarm 6 R Low transfer Alarm 1 is alarm 0 is not in alarm 7 R System condition 0 is OK 1 is invalid Alarm limits 2 is hardware malfunction 4 is communication loss to display 8 is checksum error 8 R W Local alarm acknowledge 0 is normal 1 is not acknowledged 9 R W Remote alarm horn disable 0 is horn enabled 1 is horn disabled 10 R W Configuration setup a four digit code see explanation below 11 R W Alarm time delay
24. Figure 3 3 ISO TEK 3 5 Release 3 0 Chapter 3 Alarm m Normal Low Set Point x High Set Point High Normal Low Negative Negative Alarm n T anA B 2 296 Dead Band 1 1 1 1 Alarm Initiates Represents A in Pressure Increasing Negative Pressure 0 Negative Polarity Figure 3 4 Alarm Normal High Set Point Low Set Point Low Normal High Positive m d Positive Alarm Alarm Alarm B Resets X Represents A in Pressure Alarm Initiates 0 Increasing Positive Pressure Positive Polarity Figure 3 5 Alarm Normal High Set Point N A 2 Dead T Set Point Band Negative Normal Positive Alarm d Alarm Alarm Resets Alarm Initiates Increasing Negative 0 Increasing Positive Represents A in Pressure Neutral Polarity Figure 3 6 ISO TEK 3 6 Product Philosophy Alarm Limits The point at which alarms activate and deactivate can be established by the user and changed if required The alarm limits function differently depending on the polarity selected Alarm settings are made in the same units of measurement as those selected either wc or FPM They are typically without sign as their operation is a function of the polarity selected The alarm relay in the transmitter is normally energized when power is applied to the transmitter and no alarm condition exists The occurrence of an alarm causes the alarm relay in the tr
25. Guidelines Pressures should be equal to or greater than 0 001 inch and flow velocities should be greater than 100 FPM B CALIBRATION Alarms are calibrated in the following manner using a voltmeter Having set each of the DIP switches listed above note the settings for Full Scale range and Units Deter mine the high and low alarm settings to be used in the appropriate units For positive and negative rooms using flow 100 FPM is a typical low alarm point and 250 a typical high point unless the room is very airtight A typical low setting using pressure is 0 001 and 0038 a typical high setting Determine the setup alarm voltage from the Table 2 1 As an example find the voltage for 100 FPM with a full scale range of 500 FPM From the table find the 500 column in the Feet per Minute Scales Move down to find the low value of 100 FPM and note that 1 0 volt is shown in the Alarm Voltage column Determining the appropriate alarm voltage for neutral rooms differs from the negative and positive rooms only in that the low alarm setting is used The low alarm setting then triggers an alarm on either side of the neutral point so if the unit were calibrated for a low alarm of 150 FPM any time the flow exceeded 150 FPM in either direction the low alarm would trigger Connect the common lead of the voltmeter to the GND test point under the adjustment marked Cal Adj on the back of the display module Connect the plus lead of the volt m
26. HOOTING DISPLAY DOES NOT WORK Display Indicators Lit NO Transmitter Status NO Light Flashing YES 24 VAC Power 4V NO Display Cable On Transmitter Plugged In Terminals 1 amp 2 On Both Ends Correct Problem Correct Problem YES YES Transmitter Faulty Is Configuration NO Call Tek Air Service Dept Switch B 5 203 791 1400 Set To Off Is Remote YES Polarity Input In Standby System Off YES Are Configuration Switches A2 and A3 Both Off YES System Off Set To One dfe Se No Tree Mode ree Modes Three Modes Replace Cable Call Tek Air Display Cable Most Likely Faulty Still Faulty YES Display Module Faulty Contact Tek Air Service Department 203 791 1400 Have the following information available Switch settings used Condition of display lights Observed pressure or FPM Observed direction of airflow High and Low Alarm settings in volts Observed 4 20mA reading Software version from transmitter Tek Air job facility name and location ISO TEK 5 1 Release 3 0 Chapter 5 Troubleshooting Guide ll SETPOINT INDICATORS All Three FLASH Setpoint Indicators On Display Flash YES Are Cable Connectors NO Fully Seated Correct YES Replace Cable Call Tek Air Service Department 203 791 1400 Have the following information available Switch settings used Condition of display lights Observed pressure or FPM Observed direction of air
27. POWER UP Apply power to the transformer supplying 24 VAC to the transmitter The SO TEK system should then become functional Operation of the transmitter can be verified by observing the system status indicator located inside the transmitter next to the transmit ter address switch Refer to Figure 4 1 When operating properly this light emitting 4 20MA ADJ 9 00 gt 8 50 L RS485LOOP RS 485 51 RS 485 NS t NOT USED 7290 aS 4 20MA OR VOLTAGE 420 OUTPUT eS OUTPUTTOBAS 4 20 OUTPUT oS 4 S0 10 50 3 16 DIA 4 PLACES NOT USED 519 EM DIPSWITCH FOR 8 MTG SCREW REMOTE SW oN g pe B NUT REMOTE SW CMN 4 2 amp O J EPROM SWITCH __ REMOTE SW 2 amp O d 0 RELAY OPEN ON ALARM SQ 3 RELAY COMMON 38 4 CLOSE ON ALARM QO R65 CAL ADJ z n 24 24VAC S Y Maintain Polarity __ 24VAC 4 S SEE WIRING DETAIL TO ROOM TO REFERENCE DISPLAY PROBE PROBE CONNECTION WIRING DETAIL SOLID BLACK BLACK W COLORED STRIPE Transmitter Board Layout Figure 4 1 diode should flash on and off If a display module is used one of the three setpoint indicators on the display should be lit and should flash eve
28. REF fully insert one end of the sensor tube leading to the probe in the corridor Connect the sensor end to the corridor sensor in the same manner Repeat the procedure for both the bulkhead fitting marked RM and the room sensor Assure that tubing fits correctly in fittings and that fittings are tightened Install Rough In Utility Box for the Display SPM 2100 amp 2200 only If the display module is to be incorporated into your system determine its location The display is normally mounted just above eye level about five feet on the wall out side of the door leading into the room to be monitored This location makes it easy to check the display status as one enters the room while keeping the display unobtrusive Rough in a 4 x4 double gang box at the location selected Before installing the box make sure that the SO TEK mounting bracket provided fits Remember that the display cable provided is 20 feet long and so the display must be within a 20 foot cable run of the transmitter Cables up to 100 feet are available as an op tion Pull and Connect The Display Cable SPM 2100 amp 2200 only Carefully pull the display cable between the utility box and the transmitter Leave a six inch service loop at the display end of the cable to allow for sufficient space to work on the dis play with the cable plugged in Pull the cable into the transmitter through the right knockout at the bottom of the enclosure If conduit is not used use
29. Tek tool please contact your local Tek Air Representa tive or the Tek Air Sales Office for assistance or refer to the SPM 7000 Setup Tool Operators Instruction Manual ISO TEK A 10 Release 3 0 41 EAGLE ROAD DANBURY CT 06810 TEL 203 791 1400 FAX 203 798 6534 WWW TEK AIR COM
30. and Mount Room Probe and Reference Probe Each probe consists of a white nylon Quick disconnect fitting with a filtered inlet on one end and two stainless steel trim plates Standard 1 2 OD diameter tubing is utilized to connect the probes to the transmitter enclosure and can be purchased from Tek Air Refer to Figure A 1 Each probe is normally installed in the ceiling tile one in the corridor reference and one in the room to be measured Tek Air does not normally recommend mount ing the reference probe in an anteroom Refer to Appendix B for technical explana tion Probes should be mounted several feet from any sources of air turbulence such as registers grilles or diffusers The length of tubing used to connect each sensor need not be the same but the combined length of tubing should not exceed 50 feet CAUTION Reference probes must not be shared between multiple ISO TEKS Metal inserts must be pushed into the tubing before tubing is inserted into fitting Remove the ceiling tile where the probe is to be installed A one inch diameter hole should be made in the center of the tile Remove the fitting and jam nut and one trim plate from the fitting From the unfinished side of the tile push the threaded end of the fitting through the hole Reinstall the trim plate and finger tighten the jam nut until the probe is secure Then insert the tubing into the fitting and place the ceiling tile into the ceiling grid ISO TEK A 4 Release 3 0
31. ansmitter to deactivate If a display is connected to the transmitter the alarm light flashes and the horn sounds when the alarm occurs Where either positive or negative polar ity has been selected a high and low alarm level can be set Both the high and low alarm settings are in relative not absolute terms So when the unit is set for negative polarity a high alarm occurs when the space becomes exces sively negative Refer to Figure 3 4 A low alarm occurs when the space pres sure falls below the minimum negative pressure desired When the transmitter is set for neutral operation the high alarm limit is not functional The low limit becomes the limit for both the high and low pressure alarm points generating an alarm if the pressure falls outside the window estab lished by the limit Figure 3 6 depicts the operation of the alarm comparisons When the transmitter is set for standby operation the alarm comparison func tions are not active although the setpoints are still stored Release 3 0 Chapter 3 Product Philosophy Alarm comparisons also have a dead band associated with them to prevent constant toggling on and off when the measurement is fluctuating around the alarm limit This dead band is fixed at 2 of the selected full scale range of operation Refer to figure 3 7 below Full Scale Min Active Alarm Range Low Alarm Dead Band 1000 fpm 15 fpm 20 fpm 500 8 10 250 3 5 Alarm Comparison 100 2 2 Figu
32. ays the most common being through the setup switches on the rear of the display module When the unit is active these switches are read continually by the transmitter and used as the basis of operation The transmitter is factory calibrated by comparing the measured electrical signals from the sensor to known values of velocity and pressure from Tek Air s wind tunnel These values are stored in the permanent memory of the microprocessor as a multi point calibration curve providing high accuracy over a wide range of operation In the case of the SPM 2000 the transmitter can be factory configured for a specific installation An alternate method involves using the SPM 7000 configuration tool to store the configuration parameters and download them to the transmitter When the tool is removed the transmitter then operates with the settings memorized from the tool The tool can be reconnected at any time to change the desired configuration One additional means of configuring either the SPM 2100 or the SPM 2000 transmit ter involves downloading parameters through the built in digital communications link This method is covered in a supplemental manual provided on request Desired Airflow Polarity most applications it is desirable to have air flow in one direction only Should the air flow in a different direction an alarm should occur TB isolation rooms and chemical laboratories usually require negative isolation to insure that air from a
33. c This can be ac complished by using the potentiometer marked 4mA Adjust located on the circuit board Refer to Figure 4 1 To make this adjustment active however the jumper la beled P1 which is normally between pins 1 and 2 must be moved to pins 2 and 3 The 4mA Adjust potentiometer will add or subtract a fixed current offset to the output of the transmitter and has no effect on the transmitter span It can be used to adjust to the 12mA value with the pressure inputs to the transmitter closed off put masking tape over both the high and low pressure input fittings on the transmitter to insure they are not affected by breezes in the area of the transmitter Both fittings must be fully sealed Adjust the Transmitter Calibration This feature is more applicable to units set to indicate in FPM as there is a greater chance that some difference will occur between the reading from a thermal anemometer and the SO TEK unit This is because the FPM of flow between two rooms is a function of the differential pressure between them and the area of crack space through which the air flows As the ratio of room space to crack space differs from room to room the flow coeffi cient may differ also In most cases because the crack area is so small compared to the room area the coefficient is very predictable and this is what the factory setting is based on But in some cases the user may find differences between what the unit reads and what a the
34. can be modified by the remote system include alarm setpoints units of measurement and airflow polarity Details of specific com munications methods are provided in supplemental instructions Contact the factory or your Local Sales Representitive for these documents ISO TEK 3 10 Release 3 0 Chapter 3 Product Philosophy Transmitter N2 BUSS N2 BUSS N2 BUSS Display ar 1 2 3 255 Typical JCI N2 Buss Network Modem Gateway Transmitter To Telco To Building Automation System BAS Gateway Rm Display ED 1 2 3 255 Typical Communications Network to building automation system Via Gateway Protocol adapter Figure 3 11 ISO TEK 3 11 Release 3 0 Chapter 4 Setup and Adjustment SETUP AND ADJUSTMENT Warning This product contains components that are Electrostatic Discharge Sensitive ESD Do not handle or remove the PCB assembly from the enclosure CHAPTER GOALS This chapter provides the user with the information and methods required to start up configure and tune the SO TEK system This chapter should be read and under stood prior to commissioning the unit The chapter assumes that a model SPM 2100 with display has been provided For setting up SPM 2000 units using either the SPM 7000 setup tool or communications software refer to supplemental instructions provided with the unit A
35. ce narios The selected Full Scale Range for each room has a corresponding Neutral Band It is defined as 10 of the full scale range around 0 The Status indicator in the center is the neutral indicator and will glow green when the room pressuriza tion is in the neutral band and within setpoint range red when the pressurization is outside setpoint range creating an alarm See figure 3 10 If the high alarm setpoint is set to the maximum setting the high alarm will be turned off If the pressure ex ceeds the Full Scale Range the corresponding status indicator at either end of the display will glow green see scenario F figure 3 9 ISO TEK 3 8 Release 3 0 Chapter 3 Product Philosophy Amber Setpoint LED Amber Setpoint LED o e oo rM Green Normal LED a Low Pressure LED Scenario A Negative Polarity Normal pressure Scenario B Negative Polarity Insufficient Negative Not in alarm Pressure in alarm I i a Amber Setpoint LED Lo Amber Setpoint LED 1 D 000 Red High Pressure LED Red Pressure Reversal LED Scenario Negative Polarity Excessive Negative Scenario D Negative Polarity Positive Pressure Pressure in alarm in alarm PRI Setpoint LED Setpoint LED e e 0 0 0 E Neutral LED Green Normal LED Scenario E Negative Polarity Neutral Pressure Scenario F Negative Polarity Exceeding low end of in ala
36. d Alarm No ux Altitude Sea Level ay or Cal Adjust None Remote Option Mute o in or Units In H O Rear of Display Module A CONFIGURATION Figure 2 1 The personality of the unit is established through the setting of DIP dual in line pack age switches These switches can be set to either the ON or OFF position with a pen or paper clip They are as follows Switch A 1 Mode Selection OFF is the normal mode for operation All delays will be in effect when set to OFF ON is used in setup to deactivate the delay period This is especially helpful when setting alarm limits because the user can observe the alarms take effect immediately rather than having to wait for the delay period to time out Switches A 2 and 3 Polarity These settings establish the airflow polarity of the alarm action The System OFF setting puts the unit the standby mode operates but does not send out alarm signals Positive establishes the normal room condition as having the room pressure greater than corridor pressure and so air flows out of the room into the corridor Positive might be used for HIV patients Negative establishes ISO TEK the normal room condition as having the room pressure less than the corridor and so air flows into the room from the corridor Negative might be used for TB patients Neutral 2 1 Release 3 0 Chapter 2 Quick Start Setup establishes the normal condition as having the room and corrido
37. djacent spaces flows into the room being monitored Other applica tions require positive pressurization ISO TEK can be set up to monitor either negative positive or neutral airflow polarity In addition the polarity can be deactivated so that the unit is placed in the standby mode This is useful when a room is not being used or when the polarity of the airflow is not critical All transmitter functions continue to occur when in the standby mode with the exception of alarm functions The set point and status lights are not active ISO TEK 3 4 Release 3 0 Chapter 3 Product Philosophy Desired Measurement Units The two most commonly used units for expressing the magnitude of the space pressurization are inches of water column wc and feet per minute FPM wc are units of pressure measurement and define the difference in pressure between two spaces FPM are units of velocity measurement and define the velocity of the air moving through crack spaces generally around doorways between the two spaces The velocity of the air flowing between spaces correlates to the pressure by the formula below where the constant K is a number relating to the orifice coefficient of the crack space compared to the area of the room ISO TEK measures in wc but can convert this measurement to FPM as required by the customer s application FPM K x inches water Desired Range of Operation Depending on the application the magnitude of the pre
38. e measurement is no longer in violation the Bl s will become inactive 4 Alarm latching affects Al 1 status indications ISO TEK As noted in the previous item Al 1 has a status attribute which reflects the current status of the point Bits inthe status attribute are used to indicate whether the point is in hi lo alarmviolation Activation of these bits is affected by the setting of the alarm latching feature of the Iso Tek In reporting alarms the low alarm has priority over the high alarm Thus if a high limit alarm occurs followed by a low limit violation with no intervening alarm acknowledge then only the low alarm will be reported in the AI 1 status attribute If a low violation occurs followed by a high violationwith no intervening acknowledge then only the low violation will be reported since it has priority over the high violation This could pose a problem in the interpretation of the data being recieved by the JCI BMS It is recommended that the unit be set to NON LATCHING alarms when the units are connected to an N2 JCI BMS As the BMS is continually requesting the alarm point status from each of the units there should not be an issuewith the BMS missing an alarm condition A 7 Release 3 0 APPENDICES 5 Value reported by AO 1 2 might not be the actual operating limits These two point allow an N2 master to specify the magnitude of the hi lo alarm limits in FPM Note that these values specify only the magnitude of
39. e of the isolation rooms open the rightmost isolation room pressure rises and the anteroom pressure falls Although the leftmost room is safe both isolation rooms go into alarm With the anteroom door to the hall open the anteroom pressure falls to neutral Although they are both safe both isolation 0 rooms go into alarm 0 C RECOMMENDATIONS Tek Air recommends that the isolation room pressure be referenced to the hall way and not the anteroom If the isolation room must be referenced to the ante room we suggest that alarms be set for the CDC suggested limit of 001 wc and a differential not much higher Set up and test the monitor with the anteroom door to the hallway open Warning If both rooms are monitored by SPM 2000 SPM 2100 or SPM 2200 a common reference probe cannot be used Each monitor must have its own reference ISO TEK A 3 Release 3 0 APPENDICES APPENDIX C INSTALLATION OF OPTIONAL CEILING MOUNTED ROOM AND REFERENCE PROBES Note Prior to the issuance of CDC Guidelines for isolation room monitoring and control in October 1994 Tek Air Systems furnished ceiling mounted room and reference probes with all JSO TEK systems At present all systems are shipped with wall mounted probes Ceiling probes are available as an option and must be spe cially ordered insert metal bushing into tubing prior to pushing tubing into connector Room and Reference Probe Installation Figure A 1 Locate
40. ential pressure between two spaces These spaces could be the isolation room and the hallway or the isolation room and the anteroom Tek Air strongly suggests that the isolation room be referenced to the hallway as illustrated below The following examples assume that the alarms are calibrated for a differential of 001 wc as proposed by the CDC and the anteroom is highly pressurized Relative pressure levels are shown by negative in the area of 002 wc 0 neutral positive in the area of 002 wc positive in the Isolation Rooms area of 004 wc or greater Antercom With the doors closed a monitor referenced to the anteroom shows no alarm condition In fact the Doorwa i room would be safe and isolating properly 0 Service Door Hallway ISO TEK A 2 Release 3 0 APPENDICES APPENDIX B With the doors closed and pressure levels in the isolation room at neutral or at a slight positive a monitor referenced to the anteroom would not show an alarm yet air could be transferred out into the hallway through the cracks around the service 0 doors because of insufficient differential between the isolation room and the hallway The following examples assume that the anteroom is used as the reference and the low alarms are calibrated for a minimum differential 004 just 002 wc below the normal differential of 006 wc between the anteroom and the hallway With the door between the anteroom and on
41. er Scales ea om m mem emm Voltage Negative Positive 600 1200 i200 o 9 9 00000 0 00000 0 0000 0 0000 250 150 960 1440 30 75 150 300 400 250 500 8 300 720 1680 150 0 00060 0 00300 0 0060 0 0600_ 375 60 180 75 75 750 225 850 450 480 19 20 90 225 450 900 0 00090 0 00450 0 0090 0 0900 8 10 11 400 560 1840 200 400 0 00080 0 00400 0 0080 0 0800 21 2 3 500 1000 CAUTION The high or low alarms can be deactivated by setting them at the limits of their adjustment A low alarm setting will be deactivated if set to 0 volts and a HIGH alarm by setting to 5 volts Should the alarm settings conflict i e high is set lower than low all status and set point indicators will turn off and the alarm indicator Will flash each half a second ISO TEK A 1 Release 3 0 APPENDICES APPENDIX B APPENDIX B APPLICATION OF ISO TEK TO NEGATIVE PRESSURE ISOLATION ROOMS WITH ANTEROOMS CHAPTER GOALS In many instances negative pressure isolation rooms incorporate an anteroom to serve as an airlock between the room and the hallway Given the presence of an anteroom the question arises where do mount the reference probe in the hallway or in the anteroom The problem is further complicated by the fact that the interpre tation of some local codes may lead the user to believe that the re
42. et Differential Between Supply and Exhaust Air Does Not Guarantee i Adequate Pressure Levels Correct seting Is Range Selection Appropriate NO YES or Measurement Observed Range Selected Should Not Be Too Narrow YES Are Tubes to Room and Reference Probes Switched YES Increase Range Correct Tubes Are High and Low Alarm NO Setpoints Properly Set and Do They Match Range Setting YES Adjust So That They are Outside Current Readings Does Anemometer Pressure Instrument Reading Match 4 20mA Output Signal YES Contact Tek Air Service Department 203 791 1400 Have the following information available Switch settings used Condition of display lights Observed pressure or FPM Observed direction of airflow High and Low Alarm settings in volts Observed 4 20mA reading Software version from transmitter Tek Air job facility name and location ISO TEK 5 3 Release 3 0 Chapter 5 Troubleshooting Guide VI UNIT GOES IN AND OUT OF ALARM CONSTANTLY Monitor Goes In and Out of Alarm YES YES Has Unit Been Left In SETUP Mode Reset Switch A 1 NS to OFF YES Are Alarm Limits Set Too Close to Actual Room Pressure NO Either Change Alarm Level or Increase Pressure in Room YES Is Door Being Left Open for Periods of Time Outside of Delay Period
43. eter reads the voltage indicated on the chart according to settings previously selected NOTE Either the high or low alarms can be deactivated by setting them at the limits of their adjustment A low alarm setting will be deactivated if set to O volts and a HIGH alarm by setting to 5 volts Should the alarm settings conflict i e high is set lower than low all status ISO TEK 4 4 Release 3 0 Chapter 4 Setup and Adjustment High Low Gnd Voltmeter X HIGH LOW GND Qe lt Back of Display Red Black Voltmeter Connections for Alarm Voltages Figure 4 3 and set point indicators will turn off and the alarm indicator will flash each half a second Determine Room Pressure One of two methods may be used to determine the actual room pressure The first method is preferred and utilizes the milliamp mA output of the transmitter Again note the Units and Full Scale configurations selected previously With the digital voltmeter indexed to the current mode place the positive lead across terminal 5 in the transmitter module and the negative lead on 6 Refer to Figure 4 4 Voltmeter Termination Strip 123 4 5V637 8 9 101112 Black Red Voltmeter Connections for Output Figure 4 4 ISO TEK 4 5 Release 3 0 Chapter 4 Setup and Adjustment Read the mA indicated by the voltmeter and using
44. eter to the test point marked Low Set the voltmeter for DC Volts and read the volt age Adjust the potentiometer marked Alarm Low until the voltmeter reads the voltage indicated on the chart given the selected units and full scale To adjust the high alarm setting move the positive lead of the voltmeter to the test point marked High Set the voltmeter for DC Volts and read the voltage Adjust the potenti ometer marked Alarm High until the voltmeter reads the voltage indicated on the chart ISO TEK 2 3 Release 3 0 Chapter 2 Quick Start Setup according to selected units and full scale To determine the actual room pressure one of two methods may be used The first method utilizes the milliamp mA output of the transmitter Again note the Units and Full Scale configurations selected previously Place the positive lead from a digital voltmeter indexed to the current mode across terminal 5 and the negative on 6 in the transmitter module Read the mA indicated by the voltmeter and using Table 2 1 determine either the feet per minute or the pressure The second method uses the alarm adjustment Set the Mode switch to ON to place the unit in the setup mode If the alarm is active turn the Low alarm adjustment counter clockwise to lower the setpoint until the alarm clears If the alarm is not active turn the low alarm adjustment clockwise until the alarm horn activates With a voltmeter measure the voltage between the GND
45. ference probe must be located in the anteroom A UNDERSTANDING ANTEROOMS Anterooms like their airlock counterpart in a clean room are designed to provide an additional barrier to the transfer of contaminants between the isolation room and the corridor Typically an anteroom is pressurized to a level which is higher than the level of the isolation room and the adjacent hallway Additionally one anteroom may serve two or more isolation rooms Because anterooms are generally small and have significantly fewer leaks than the isolation rooms they serve they can usually be pressurized to a greater extent than the isolation rooms The result is that getting a high positive pressure difference between the anteroom and the isolation room is far easier than getting a high differ ence between the isolation room and the corridor However because of its small size and relatively high airflow the pressure in the anteroom tends to fluctuate to a greater extent than in an isolation room The leaks between the isolation room and the adjacent areas hallway adjacent rooms etc don t occur just at the entry door to the room they also occur at electri cal outlet cutouts service doors ceiling cavities mechanical and electrical chases and at windows The anteroom only assists in providing a reduction in the move ment of air as a person moves from the hallway and the isolation room or vice versa B APPLICATION OF ISO TEK ISO TEK measures the differ
46. flow High and Low Alarm settings in volts Observed 4 20mA reading Software version from transmitter Tek Air job facility name and location ALARM LIGHT FLASHES Setpoint and Status Indicators Not Lit OTHER INDICATORS Alarm Indicator ARE OFF Flashing Slowly YES YES Check High And Low Alarm Limits High Set Below Low Correct NO Call Tek Air Service Department 203 791 1400 Have the following information available Switch settings used Condition of display lights Observed pressure or FPM Observed direction of airflow High and Low Alarm settings in volts Observed 4 20mA reading Software version from transmitter Tek Air job facility name and locatic ISO TEK 5 2 Release 3 0 Chapter 5 Troubleshooting Guide IV ALL STATUS INDICATORS Check Sum Error FLASH RED AND ALARM epartment a HORN SOUNDS 203 791 1400 V UNIT IS ALWAYS IN Monitor Continuously ALARM In Alarm YES NO Is Door Closed YES Close Door Is Pressure Magnitude and Direction NO Determined with Anemometer and Smoke Stick Correct and Within Limits YES Check Causes Lack of Supply or Exhaust Supply Exhaust Differential NO Does Display Show the Proper Door Fit Poor Polarity Airflow Direction Large Cracks Around Door Windows Leak NO lis Polarity Setup Switch YES NOTE Having an Adequate Correctly S
47. h Red amp Alarm Horn Sounds VI Unit goes in amp out of Alarm constantly Appendices Appendix Setup Voltage Charts pp Appendix B Application of Iso Tek to Negative Pressure Isolation Rooms with AnteroomS pp A Understanding AnteroomS pp B Application of Iso Tek pp CRecommendationms rue Appendix C Installation of Optional Ceiling Mounted Room and Reference Probes pp Appendix D Display Transmitter Software Compatibility Appendix E CommunicationTransfer Variables For TEK AIR Open PEIOIDDOL E CH Ee ERI uod Du RUE Appendix F N2 Communications pp Appendix G Model IMD 5000 Mini Display for Iso Tek iii Chapter 1 Installation INSTALLATION Warning This product contains components that are Electrostatic Discharge Sensitive ESD Do not handle or remove the PCB assembly from the enclosure A PREPARATION The SO TEK Space Pressurization Monitor that you are about to install will provide accurate reliable indications of the pressure differences between two separate enclosed spaces It is most frequently used in hospital isolation wards chemical laboratories critical care and burn units and other areas where the monitoring of air pressure is vital The Space Pressurization Monitor is a critical part of the care and safety of laboratory personnel
48. head screws provided These may be temporarily left loose until the alarm point settings are made See note 14 below if your unit is an SPM 2200 and includes an LCD on the display module 12 Double Check All Connections Review connections to power remote interface devices and display SPM 2100 only to be sure that they are correct before apply ing power to the unit Improperly connected wires will damage the unit when pow ered up 13 Power Up Unit Activate the circuit breaker that feeds the power transformer The unit should begin to function Proper functioning can be verified by observing the status indicator LED inside the transmitter next to the multi position switch this should be flashing In addition one of the set point indicators on the display module should be lit and should flash off and on every few seconds 14 Note On Model SPM 2200 the display module has an additional LCD display which needs to be connected electrically There are two conductors on each end of the plug in cable which are separate from the plugs These two conductors connect to the LCD amp terminals on the back of the display and to terminals 5 amp 6 of the transmitter board See figure 1 8 for SPM 2200 wiring and set up ISO TEK 1 7 Release 3 0 Chapter 1 LCD Indicator _ Also Available in FPM Room Display Module High L 000 ow GND Front View Rear View
49. hospital patients health care workers and others The health of people may depend on the proper installation setup and mainte nance of this device This manual is designed to make installation of the SO TEK Space Pressurization Monitor as simple as possible Please follow the instructions closely work carefully and deliberately and check your work at each stage of completion lf you run into any difficulties that you cannot resolve on your own Tek Air s service department will be happy to help you and can be reached at 203 791 1400 Tek Air is committed to making the task of installing the SO TEK as simple as possible We need and appreciate any comments you might have regarding our product or this manual Please direct these to our Service Department at our office in Danbury CT B MODEL TYPE The SO TEK Space Pressurization Monitor can be ordered in two different ar rangements which are determined by the model code The SPM 2000 does not include the wall mounted display unit The SPM 2100 amp 2200 are complete with the display Instructions which pertain only to the SPM 2100 amp 2200 series will be indi cated by a boldface SPM 2100 amp 2200 in parentheses SPM 2100 amp 2200 only The exact model type ordered can be determined from the packing list C TOOLS In addition to standard tools for installing and wiring electrical equipment you will need a size 00 screwdriver and a 1 16 inch Allen key SPM 2100 amp 2200 only
50. ip and material for a period of thirty six months from the date of shipment to the customer This limited warranty is subject to the following conditions With respect to any repair services rendered Tek Air warrants that the parts repaired or replaced will be in good working condition under normal use for the period of the original warranty or for 90 days from date of repair if the original warranty period has expired e Unless specifically authorized by Tek Air in writing no warranty is made with respect to and no liability is assumed in connection with any goods which are incorporated into other products or equipment by the Buyer e foregoing is in lieu of all other warranties and is subject to the conditions and limita tions stated herein No other expressed or implied warranty of fitness for particular purpose or merchantability is made The exclusive remedy of the user or purchaser and the limit of the liability of Tek Air or any other seller for any and all losses injuries or damage resulting from the use of this product shall be the return of the product and the refund of the purchase price or at the option of Tek Air or any autho rized seller the repair or replacement of the product In no event shall Tek Air or any other seller be liable for any incidental or consequential damages Table of Contents 1 Installation 1 1 B Model Type 1 1 MEO e 1 1 Materiale
51. itter and local display The SPM 2000 system consists of only the transmitter and is designed to be used where a local display is not required ISO TEK 3 1 Release 3 0 Chapter 3 Product Philosophy When the SPM 2000 is purchased the user can choose from three methods to configure the transmitter for an application factory configuration configuration by digital communications or configuration through Tek Air s SPM 7000 configu ration tool B OVERALL OPERATION AND THEORY The 50 SPM 2100 system consists of four major components the transmitter module the display module the room sensing probe and the hallway reference probe Refer to Figure 3 1 The transmitter is the heart of the unit consisting of the airflow sensor and microprocessor based electronics While the transmitter is nor mally provided with a room display module when purchased alone as a SPM 2000 it is fully capable of functioning as a stand alone unit A display module can be added to the SPM 2000 provided the customer has a hand held calibration tool Tek Air Option or sends the unit back for re configuration Communications 24 VAC or Signals To AP 120 VAC Remote ME ___ Display Cable Key Switch provided Transformer Transmitter Unit Mic Sensing Tubing Sensor Tubing Reference Room Isolation Room Hallway or Laboratory Monitor System Components Figure 3 1 The transmitter is typically mounted abo
52. knowledge button The room display module can be mounted in the lab patient room anteroom or in the hallway on a standard 4 x4 electrical utility box C SENSOR PRINCIPLE OF OPERATION The SO TEK utilizes thermal mass flow sensing to determine the velocity of the air moving between rooms Refer to Figure 3 2 The sensor assembly is housed in the transmitter electronics enclosure and connects with the room sensing probes by standard control tubing An extremely small volume of air moves from the higher pressure space to the lower pressure space by passing through the tubing and the sensor The velocity of flow is based on the difference in pressure between the two rooms The sensor assembly is a housing which encloses two resistance type temperature sensors with a resistance heater between them The two sensors and the heater are each micro machined from silicon and are extremely low in mass The low mass decreases the response time of the sensor to a few milliseconds much faster than conventional warm wire sensors Upstream Heater Downstream Temp Sensor Temp Sensor Heated Air ma Sensor Euer Heater Circuit To Microprocessor From Microprocessor Bridge Circuit Thermal Mass Flow Sensor Figure 3 2 Air can move through the sensor in either direction depending on which room is lower in pressure The power to the heater is controlled so that the surface temperature of the heater remains at a constan
53. lid black one striped provided only if specifically ordered If any of the components are determined to be missing please contact your local representative or Tek Air s Sales Department immediately at 203 791 1400 Please have your order number and our job number available when you call F INSTALLATION STEPS Locate and Mount the Transmitter Determine where the transmitter will lo cated It is recommended that the transmitter is installed above the ceiling line on cinder block or drywall on the corridor side of the wall separating the room to be monitored from the reference area The transmitter needs to be accessible for future maintenance Refer to Figure 1 1 TRANSMITTER Install above ceiling line TRANSFORMER M OPTIONAL 25 120VAC TO REMOTE INTERFACE WALL EM CEILING TILE 1 2 OD TUBE ISOLATION D HALLWAY ROOM DISPLAY DISPLAY MODULE CABLE UTILITY BOX ZIG ZAG FOR SERVICE LOOP ROOM REFERENCE PROBE lo 7 FLOOR ee System Component Layout Figure 1 1 ISO TEK 1 2 Release 3 0 Chapter 1 Installation Mount the transmitter above the acoustical tile with four 4 8 dry wall screws using the four mounting tabs on the side of the enclosure Note for Series SPM 2100 amp 2200 only When mounting transmitter module make sure that it is located at an approp
54. mute button ANSWER AUTOMATIC RESET LATCH ALARM e Is the unit going to operate at an altitude which is significantly above sea level ANSWER SEA LEVEL 1000 2500 5000 ISO TEK 4 2 Release 3 0 Chapter 4 Setup and Adjustment The answers to the following questions may have to be determined after the unit is operating e What full scale range do need In general select the smallest range which covers the range of pressures or flow velocities expected or ob served to be encountered Too large a range provides poor alarm and output resolution Too small a range and space conditions may exceed the instrument s limits 500 FPM is typical for hospital isolation rooms ANSWER WC 73 001 4 005 4 010 4 100 OR ANSWER FPM 7 100 O 250 500 1000 e What alarm delay period do need In general start with the smallest delay period then increase it if random alarms become a nuisance ANSWER SECONDS 0150 30 0600 120 C SET CONFIGURATION PARAMETERS With an SPM 2100 the configuration is performed by setting the position of sixteen programming switches located on the rear of the display module Refer to Figure 4 2 These switches are provided in two DIP dual in line package switch banks marked Switch A and Switch B Switches are identified by bank and position number Hence the twelfth switch from the top is called B 4 Starting with switch A position 1 individually set the switches t
55. n H2O H2O Ten digit Acknowledge Function 0 is not latched 1 is latched Ones digit Units 0 in H20 1 fpm Notes 1 No terminal connection provided for N2 Ref Keep shield continuous do not tie to Connect N2 Here gt RS 485 Jo controller gnd 2 Maintain polarity of communications wires 3 Use jumper P6 to connect termination resistor NT no termination T termination connection Connect N24 Here gt RS 485 S Jo Fig 10 N2 Bus Connection ISO TEK A 8 Release 3 0 APPENDICES APPENDIX G MODEL IMD 5000 MINI DISPLAY FOR ISO TEK DESCRIPTION The 50 MiniDisplay is designed to be used to indicate the status of a room being served by ISO TEK monitor Small in size the MiniDisplay indicates a room is safe with a green indicator or in an unsafe alarm condition with a red indicator The display incorporates a horn which is intended to pro vide an audible indication of the presence of an alarm When pressed a push button will silence the alarm horn The MiniDisplay also includes a communications jack to allow the user to connect an SPM 7000 50 TEK setup tool without accessing the transmitter normally located above the ceiling line Using the tool the user can read the room pressure level adjust alarm settings and modify the SO TEK transmitter configuration The MiniDisplay alarm indicator is actuated by the ISO TEK alarm contact and so this contact will not be available as an o
56. o establish the con figuration settings determined previously A worksheet documenting the factory established settings can be found on the inside of the transmitter enclosure door Four blank columns are provided to document changes made by the user in the field Alarm Setting Display Potentiometers Alarm Connector N High Low A Y Configuration Calibration MES Switches Potentiometer a p High Low GND 5 Voltage Test Alarm Setting Points Test Terminals Switch Legend SWITCH 4 Cal Adjustment Off none On Yes 5 Remote Option Off mute On polarity Latched Alarm no yes Altitude 89eg slr E 8 100 ft min Sea Level 250 ft min 1000 ft 500 ft min On 2500 ft Off in H20 1000 ft min On 5000 ft On ft min 6 Units eggeg eges leg 9238 2238 Rear of Display Module Figure 4 2 ISO TEK 4 3 Release 3 0 Chapter 4 Setup and Adjustment Two switch positions were not addressed previously in the section of this chapter titled Establishing Configuration Settings and these should be set initially as follows Switch A position 1 labeled Mode
57. or the activation of the alarm horn light and relay associated with the unit Generally 15 seconds is appropriate Switch B 1 Latched Alarm This switch determines if the alarm indications horn lights relay are cleared automatically when the alarm condition clears or if the alarm will be latched held until the alarm MUTE button is pushed Normally this is set to NO for not latched Switches 2 and 3 Altitude Altitude affects the output of the sensor in the 50 unit Set this switch for the altitude which is closest to the altitude at your location Switch B 4 Cal Adjustment The feet per minute of flow between two rooms is a function of the differential pressure between them and the area of crack space through which the air flows As the ratio of room space to crack space differs from room to room the flow coefficient may differ also In most cases because the crack area is so small compared to the room area the coefficient is very predictable and this is what the factory setting is based on In some cases you may find differences between what the unit reads and what a thermal anemometer placed under the door reads Setting this switch to ON activates the calibration adjustment which can then be turned until the output of the unit agrees with the thermal anemometer In these cases this switch may be set to YES to activate the calibration adjustment marked Cal Adj This multi turn potentiometer can be rotated
58. re 3 7 0 1 0 0012 in HjO 0 002 in H O 0 01 0 0002 0 0002 0 005 0 00007 0 0001 0 001 0 00001 0 00002 Time Delay Period Because people must move in and out of the space being moni tored it is not desirable to have an alarm action take place instantaneously Typically it takes a person a few seconds to open and close a door as they pass between two rooms If they have equipment or carts it may take even longer To account for this ISO TEK has an adjustable time delay period which will delay the actuation of an alarm When properly set a person entering a room will not initiate an alarm unless they leave the door open The delay period is adjustable for 15 30 60 or 120 seconds Alarm Latching Latching operation defines what happens to an alarm which occurred previously after the condition which caused it has cleared but before the occurrence of the alarm was acknowledged by the user In a non latching opera tion should the alarm clear the alarm horn and relay output from the unit will be restored to the normal state With latching operation the horn will continue to sound and the relay will stay in the alarm position until the alarm has been acknowl edged by the user The alarm may be acknowledged either through the mute button on the SO TEK display or by a remote mute button wired to the transmitter input terminals Latching operation should not be used if a display is not present or if the remote mute feature is not
59. riate distance for the length of cable purchased to reach the location of the display module A 20 foot prefabricated cable with RJ 45 connectors on both ends is supplied for this pur pose Other length cables available on special order 2 Locate and Mount the Power Transformer Option The transformer supplied with the SO TEK Space Pressurization Monitor may be located either at the circuit breaker or the transmitter at the installer s convenience The case of the transformer must be grounded according to the instructions provided 3 Run Power Wiring Pull wires for 120 volt service from the circuit breaker to the trans former and splice with the line side black and white wires on the transformer The trans former case must be grounded Pull wires capable of handling 24 VAC from the two ter minals labeled load on the transformer to the transmitter module Note that the termi nals located on the transmitter board can be removed from the circuit board of the trans mitter to make connections easier Refer to Figure 1 2 Note Multiple Transmitters powered by a common power source need to maintain polar ity on J5 connector for AC power 24VAC HOT 10VA J5 120 VAC and 50 or 60HZ 24VAC COMMON Ground GREEN CONNECTOR CAUTION Polarity must be maintained when a ON ISOTEK TRANSMITTER BOARD transformer is used for multiple units Transmitter Power Figure 1 2 Connect hot wire on J5 connector corresponding
60. rm Full Scale Range High Alarm turned off Not in alarm Status amp Alarm LED Indicator Operation in Negative Polarity Setpoint Range Figure 3 9 Note Positive Polarity Scenarios would represent perfect mirror images of the above Full Scale Neutral Pressure Range Visualization of Status Scenarios above Range Band hi 1000 f 100 f 0 01 int 19 001 0 001 0 01 in P pm setpoint 500 50 range 250 25 100 10 Scenarios F A B E D 0 1 H O 0 01 in H O 0 01 0 001 0 005 0 0005 Note Neutral Band for Full Scale Range of 0 01 in H O a 0 001 0 0001 Neutral Light Operational Band Figure 3 10 ISO TEK 3 9 Release 3 0 Chapter 3 Product Philosophy A large red LED alarm indicator is provided to display the presence of an alarm condition This indicator flashes when an alarm condition has occurred for a length of time exceeding the preset time delay period An audible alarm horn built into the display sounds in conjunction with the LED alarm indicator When the alarm is acknowledged by pressing the MUTE button the horn will silence and the LED alarm indicator will provide a steady red indication This will continue as long as the alarm condition still exists All LED indicators are raised from the case slightly to provide adequate viewing from any angle The LED alarm indicator can be seen from fifty feet away in normal ambient lighting conditions This allows the display to be mo
61. rmal anemometer placed under the door reads CAUTION Using thermal anemometers properly requires care skill and the proper technique At low flows these instruments are typically no better than 10 of reading Therefore a calibration adjustment should not be made to trim slight varia tions within 10 between devices ISO TEK 4 6 Release 3 0 Chapter 4 Setup and Adjustment To compensate for this difference set switch B 4 labeled Cal Adjustment to YES to activate the calibration adjustment potentiometer This adjustment can then be rotated in either direction until the mA output of the unit agrees with the thermal anemometer Refer to Appendix A Table 1 CAUTION When the calibration is complete the switch should be left in the YES position Returning it to NO will deactivate the adjustment made NOTE On Model 2200 the LCD indicator range must match this range If not the zero and span pots on the LCD can be used to match the display to the selected transmitter range A 4 20 mA generator can be used to drive the LCD by disconnect ing the LCD and wires from the transmitter and connecting the generator in its place At 4 mA the display must read the appropriate minimum value if not adjust the Zero pot At 20 mA the display must read the appropriate Full Scale value if not adjust the Span pot Re connect the transmitter to the LCD when finished ISO TEK 4 7 Release 3 0 Chapter 5 Troubleshooting Guide TROUBLES
62. rs at the same pres sure and so air does not flow between them Switches A 4 and 5 Full Scale Range These establish the range of operation of the display LEDs light emitting diodes and the 4 20mA analog output They should be selected to maximize the sensitivity of the unit The range selected is in either feet per minute FPM or inches water column wc depending on the setting of switch B 6 The ranges shown are bi directional meaning they are plus and minus e g 250 FPM is 250 to 250 FPM Typically for hospital isolation rooms either the 005 250 or 010 500 setting is appropriate NOTE On Model 2200 the LCD indicator range must match this range If not the zero and span pots on the LCD can be used to match the display to the selected transmitter range A 4 20 mA generator can be used to drive the LCD by disconnecting the LCD and wires from the transmitter and connecting the generator in its place At 4 mA the display must read the appropriate minimum value If not adjust the Zero course and fine pots At 20 mA the display must read the appropriate Maximum value If not adjust the Span course and fine pots Then re connect the transmitter to the LCD when finished Switch A 6 Alarm Tone Active This switch allows the user to turn off deactivate the alarm horn when it is desirable When set to NO all alarm functions operate except the horn Switches A 7 and 8 Alarm Delay These establish the delay period f
63. ry few seconds If the unit does not power up properly and the transmitter indicator light does not light or flash check for the presence of 24 VAC power on terminals J5 If power isn t present troubleshoot the source of the problem If 24VAC power is present refer to the troubleshooting charts in Chapter 5 It is possible that the transmitter will function properly but the room display module ISO TEK 4 1 Release 3 0 Chapter 4 Setup and Adjustment switches are not set for System Off check all connections to verify that they are properly plugged in Should there be a communications failure between the display module and the transmitter all three setpoint indicators will flash Refer to the troubleshooting guides in Chapter 5 B ESTABLISH CONFIGURATION PARAMETERS Each ISO TEK unit must be configured Configuration is the process by which the user selects the features that are important for that particular application It is through configuration that the operation of the system is customized for the needs of a particular facility With either an SPM 2000 SPM 2100 or SPM 2200 if the unit will utilize the commu nications capabilities to talk to a remote computer or building automation system the address of each transmitter must be determined and set The address is set to a number between 1 and 255 using the switches on the transmitter board For com plete instructions on setting these switches refer to supplemental instruction
64. s regarding communications and to obtain the communications protocol please contact the Tek Air Service dept at 203 791 1400 Prior to configuring the SO TEK the user must answer the following questions For a complete description of each of these configuration options refer to Chapter 3 Section D titled Transmitter Functions e Dolwantthe polarity negative neutral positive or standby of operation of the unit to be fixed or selectable by a remote set of control contacts ANSWER FIXED REMOTE e Ifthe polarity is to be fixed what is the normal desired polarity ANSWER NEGATIVE NEUTRAL O POSITIVE e What units of measurement should the SO TEK use as a basis for opera tion There is no standard regarding how this parameter should be set In general use the method which matches the output of the test instrument to be used to set up the room If a thermal anemometer is used select feet per minute If a digital manometer is used select inches of water Because it incorporates the square root law feet per minute generally provides better resolution over a wider range of operation ANSWER O INCHES OF WATER FEET PER MINUTE e How do wish to use the alarm tone in the room display ANSWER O ACTIVATE O DISABLED Dol wish to have an alarm condition automatically reset the horn light and contacts when the alarm clears or do want to maintain the alarm condition until the alarm is acknowledged by pressing the
65. should have P6 in the NT position The end device should also be terminated See figure 1 5 Note Maintain polarity on all terminal pairs to prevent damage to equipment during power up ISO TEK 1 4 Release 3 0 Chapter 1 Installation Gateway Device Iso Tek 1 Iso Tek 2 1 3 Iso Tek 4m Z 1 2 12 12 ia IB I 0 et Terminating Jumper P6 to the T position Common Tape back BM V v SHEE Sgrena Wine 9 Wire nut and tape shield drain Communications Connections Figure 1 5 Analog Output Terminals 5 and 6 provide the capability of transmitting a 4 20mA analog current signal which is proportional to either the room transfer velocity or pressure The scaling range is set either with the DIP switches on the display or with an optional hand held configuration tool available from Tek Air The current signal is a source type powered and can be converted to a voltage by using the appropriate resistor not provided 22 or 24 gauge shielded wire should be used and the shield should be terminated per BAS requirements Connections should be as shown in Figure 1 6 se vod To BAS 4 20mA Output use resistor s for voltage Analog Output Connections Figure 1 6 5 Locate and Mount Room Wall Probe and Reference Wall Probe Each probe consists of a quick disconnect fitting with a filtered inlet on one end and
66. splay it will not read configuration information from it Note 3 Although Transfer Variable 9 seems to make sense only when a Display is attached it is read write in Display Override mode in the event the user decides to attach a display Be cause the Transmitter does not read from the Display this Transfer Variable provides a method to enable or disable the alarm tone which can be activated on the Display in an alarm condition Note 4 The Acknowledge Function tens digit of the configuration code allows the user to write to the alarm latching feature When the code is read the digit will indicate whether or not an alarm is currently latched ISO TEK A 6 Release 3 0 APPENDICES APPENDIX F N2 COMMUNICATIONS Conditions which should be understood prior to the commisioning of communications to the Iso Tek SPM 2000 series product 1 When the unit is set for OFF or setup modes of operation the N2 status attribute could indicate that the Al 1 point transfer velocity is unreliable Presently this Al 1 indicates this condition only during EEPROM fault or loss of A D converter reference voltage The unit will only be in this condition when the unit is not in the normal operating condition i e in setup mode or during the changing of the configuration this condition is a maintainence mode Any communications between the unit and the BMS should be considered as such until the user has completed the changes and the BMS has recieved
67. ssures or velocities being measured may differ greatly Typically laboratories and patient rooms not specifically built to provide a high degree of pressurization operate with very small pressure differences typically 0025 wc or less On the other hand clean rooms and high containment labs have extremely tight construc tion and can be pressurized to levels fifty to one hundred times higher The range of operation of the 50 can be set for any of 100 0 001 the following selections shown in Table 3 1 Refer to Chapter 250 0 005 4 for instructions on how to set this parameter 500 0 01 1000 0 1 To operate properly in each of these situations the range of operation must be selected so as to maximize the resolution of Table 3 1 the measurement Just as an automobile speedometer with a maximum speed of 1000 mph would be useless in a car 2 T because such a small portion of the Min Scale Max Scale i display range would be used in normal driving the measurement range must be matched to the application 20 Mid Scale When a particular range of operation is set operation is optimized over this range All alarm settings are made throughout this range and the 4 20mA output is proportional to this range Figure 3 3 illustrates how the 4 0 20mA signal will vary if the operational range is set at 250 to 250 FPM lt gt zZ 250 0 250 FEET PER MINUTE Measurement vs Output
68. t differential above ambient The upstream sensor first measures the temperature of the air prior to being heated The downstream tempera ture sensor senses the increase in the temperature of the air as it exits The greater the velocity volume of the air passing across the heater the greater the difference in tem perature between sensors If the airflow direction changes the reverse occurs The electrical signals generated by the up and downstream temperature sensors are sent to the microprocessor where they are converted to the airflow direction differ ential pressure and velocity ISO TEK 3 3 Release 3 0 Chapter 3 Product Philosophy D TRANSMITTER FUNCTIONS One of the main benefits of the SO TEK transmitter is that it can be configured to meet the requirements of a user s specific application Should those requirements change over time the unit may be re configured as required Configuration is pos sible because the transmitter is microprocessor based The features which can be configured are as follows e Pressurization polarity negative neutral positive or standby Measurement in FPM or inches H O e Range of operation 4 e Alarm limit adjustment Period of time delay before alarm occurs e Latching or non latching alarm selection e Deactivate activate audible alarm Remote polarity adjustment or muting Altitude of the transmitter With the SPM 2100 amp 2200 configuration can be accomplished in several w
69. the Current Negative and Current Posi tive columns in Appendix A Table 1 determine either the feet per minute or the pressure The second method uses the alarm adjustment To place the unit in the setup mode set the Mode switch to ON Turn the high alarm adjustment fully clockwise If the low alarm is active turn the Low Alarm adjustment counterclockwise to lower the setpoint until the alarm clears If the alarm is not active turn the Low Alarm adjustment clock wise until the alarm horn activates With a voltmeter connected as in Figure 4 3 mea sure the voltage between the GND and LOW test points To determine either the FPM or wc that the room is pressurized to use the appropriate Units and Full Scale configu rations compare this voltage to chart in appendix A CAUTION when finished remember to set the Low Alarm alarm adjustment back to the desired voltage and return the Mode switch to Operational Adjust the Transmitter Zero Point The 4 20 mA output from the transmitter is factory calibrated to operate over the full scale range selected Four 4 mA is the negative full scale value twenty 20 represents the positive full scale value and twelve represents zero neutral These calibration constants are set in the microprocessor of the transmitter circuit board Occasionally it may be required to trim the signal to match the requirements of a particular type of input device indicator controller recorder et
70. the limits The actual alarm thresholds can be determined by examining the High Low Alarm Limit attributes of Al 1 The values reported in Al 1 reflect the effect of the current Iso Tek polarity whereas the AO 1 2 does not Also note that when the diplay override is off the values reported at AO 1 2 may be different from those reported via Al 1 This is because with display override off the potentiometer settings on the the display determine the alarm thresholds These reregisters when used correctly will report the correct response However the JCI BMS user or persons implementing the BMS system must understand this information N2 Point Map POINT DESCRIPTION RANGE VALUE Transfer Air Velocity 1000 to 1000 Hi Alarm Setpoint 1000 to 1000 Lo Alarm Setpoint 1000 to 1000 Alarm Delay 15 30 60 120 0 System Configuration See Below Alarm Horn Enable 1 enabled 0or1 Hi Alarm Status 1 Alarm 0 or 1 Lo Alarm Status 1 Alarm 0 or 1 Invalid Limits 1 Invalid 0 or 1 Hardware Fault 1 Fault Vref or EE Checksum Error 0 or 1 Local Alarm Ack Overide 1 to Ack alarm always reads as 0 0 or 1 1 1 2 3 4 1 1 2 3 4 5 Configuration Setup details A four digit code defining the setup of the monitor Thousands digit Polarity 1 positive 2 negative 3 neutral 0 standby off Hundreds digit Full Scale 1 100 fom 2 250 fpm 3 500 fpm 4 1000 fpm 001in H2O 005in H2O 01 i
71. to 24 VAC on the circuit board The common wire is connected to J5 connector which is marked 24 VAC on the circuit board 4 Connections to Remote Interface Devices Several remote interface options which can be used for a variety of applications are provided The installer should determine which will be utilized for the application All wires required for remote inter face should be brought in through the two Romex connectors at the bottom left cor ner of the transmitter module enclosure Alarm Contact Outputs Terminals 12 13 and 14 provide relay contacts that can be connected for remote alarm indication The contact current is limited to 0 5 amp and only low less than 30 volts AC or DC voltage should be used Wire gauge should not exceed 18 gauge Contacts in normal powered up state appear as indi cated in Figure 1 3 A status change Alarm Condition will reverse their condition as in Figure 1 3A ISO TEK 1 3 Release 3 0 Chapter 1 Installation L 12 NC NO Pe ecu NO 14 Rating 0 5A 924VAC Rating 0 5A 924VAC Figure 1 3 Figure 1 3A Alarm Contact Connections Remote Function or Mute Selection Terminals 9 10 and 11 allow for the connec tion of either a remote airflow polarity selector or mute switch A dry un powered contact must be used for this option Wire gauge should not exceed 18 gauge A complete description of how to utilize this
72. unted in locations which are out of reach to those who would tamper with the unit Located on the rear of the display module are the configuration switches the alarm adjustments and the calibration adjustments The use of these controls is detailed in Chapter 4 of this manual Note Model SPM 2200 has an LCD for readout of inches WC or FPM in 3 1 2 digit format This is factory set but can be field adjusted per section A Chapter 2 under Swiches A 4 and 5 Full Scale Range F COMMUNICATIONS The SPM 2000 IsoTek transmitter is capable of digital communications on an RS 485 two conductor network cable at 9600 baud Up to 255 units can be addressed on one network Two communications protocols are available to the user Tek Air Open Protocol and JCI N2 Protocol In both cases the SPM 2000 IsoTek can share the network with Tek Air s FVC 2000plus Fume Hood Controllers of the same proto col Open Protocol allows the SPM 2000 IsoTek Transmitter to interface the Honeywell Excel system Tek Air will make the Open Communications Protocol available to any control sys tem manufacturer Interfaces to Johnson Controls Metasys system and Honeywell s Excel M control ler are just two of the several interfaces currently available Tek Air will make the communications protocol available to any control system manufacturer Data com municated to the remote system includes transfer air velocity alarm setpoints and alarm status Parameters which
73. utput to a building automation system BAS Where an alarm indication must also be sent to a BAS a secondary contact is provided at the display and may be used for this purpose ISO TEK MONITOR Alarm Alarm Mute 4 5 in 97 3 25 in 9 2 5 in lt 1 5 2 75 in ____ LL 1 6 in 2 75 in 9 ISO TEK MiniDisplay Dimensions ALARM INDICATION When the pressure level in the room being monitored is normal only the green LED is lit When an alarm condition exists for a length of time exceeding the time delay period established with the 150 TEK configuration the green LED turns off the red LED will flash and the alarm horn will sound When the silence button is pressed the horn will silence and the red LED will be lit steadily Should the alarm condition clear the red LED will turn off and the green will again be lit The horn can be permanently deactivated via a jumper on the back of the display The contact closure which is provided for interface to a BAS is normally open and closes when an alarm condition is present Contact operation follows the alarm condition and is not reset by the silence push button ISO TEK A 9
74. ve the hung ceiling of the hallway The transmitter provides several types of logic and signal interfaces to meet the require ments of a wide variety of applications Simple interface to building management systems includes contact closures for alarms and a 4 20mA analog output signal for transmitting measurement values The transmitter can be interfaced to contact inputs for remote indexing of airflow polarity or to remotely mute the alarm horn Full seamless integration with many building automation systems can be achieved with ISO TEK s direct digital RS 485 communications Two space pressure probes are provided with each pressure monitoring system One is mounted in the room to be monitored and the second is in the reference space typically a hallway These probes are designed to minimize the effect of air turbulence on the measurement pickup points The probes connect to the transmit ter by means of standard 1 2 OD control tubing which may equal up to fifty feet in combined length The small size of the tubing eliminates the need for large penetra tions normally associated with through the wall type thermal anemometers ISO TEK 3 2 Release 3 0 Chapter 3 Product Philosophy The room display module is provided with the SPM 2100 amp SPM 2200 and it is designed to be used where the continuous visual monitoring of the space pressur ization status is required The display includes set point and status lights an alarm horn and an ac

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