Manual for Steritrac Monitor

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3. 3

22. 22 SPECIFICATIONS

28. 28 CONTACTING CHEMDAQ ChemDAQ, Inc. 300 Business Center Drive Pittsburgh, PA 152 0 5 Phone: 412.787.0202 Toll Free: 800.245.3310 Fax: 412.788.2526 For a General Informational Question, Please e - mail: info@ChemDAQ.com For a Technical Support Request, Please e - mail techsupport@ChemDAQ.com

1. Document Number: CM - 112 - A - 0.0.5 Copyright ChemDAQ Inc. 2019 All Rights R eserved ChemDAQ Steri - Trac ® Gas Monitor Operation Manual

7. 7 Steri - Trac Remote Display If a monitor is in alarm indicating a gas leak, no - one should enter that area without adequate protective equipment until the gas leak has been rectified. In order to avoid the situation where a person must enter the hazardous location in order to read the display on the monitor, remote displays can be connected to the monitor and placed outside the room or immediate l ocation. T he remote display provides an immediate and convenient means for people to assess the danger from outside a room before entering. Use of the remote display is very simple. The remote display is wall mounted, connected by cable to the monitor and, in some cases, connected to a local power supply . The remote display will duplicate the response of the monitor. Thus the remote display will show the same display reading as the monitor, and it has a n auditory horn that sounds at the same time as the area monitor. T he remote display horn can be silenced by pressing the alarm silence button on the remote display but this does not silence the area monitor horn. Both the remote display and the area monitor horns are silenced when the area monitor sil ence button is pressed.

4. 4 Welcome Message from ChemDAQ We hope that you are pleased with your ChemDAQ Steri - Trac ® Gas Detection System. This Gas Detection System has been designed and produced using state of the art facilities and we at ChemDAQ are very proud of this product and expec t it to provide you many years of reliable service. The ChemDAQ gas monitoring s ystem has been designed with simplicity of use as a basic design pri nciple. Once installed , the system requires no maintenance beyond periodic calibration of the sensors and even this function has been simplified . The user will simply click out the old sensor and pop in the new sensor; simp l er than changing a light bulb. W hile the ChemDAQ system is designed to be simple to use, it also contains all the advanced features that experienced users have come to expect in modern gas detection instruments While the Steri - Trac monitor can be used as a standalone instrument, the ful l benefit of the design is only achieved when the monitor is integrated into a gas monitoring system. A full gas detection system consists of one or more monitors connected to a ChemDAQ data acquisition system (DAQ). In addition, there may be one or more r emote displays connected to the monitors and remo t e video displays where the results of the monitoring need to be observable at more than one location. The gas detection system has been designed to be modular. This approach allows the product to be tailo re d to each customers needs, and it provides for easy expansion as t hose needs change in the future. Our focus at ChemDAQ is customer service and we want you to know that we will work with you to solve any problems that may occur, though none are anticipate d. We welcome praise about gas detection products and customer service, but we especially want to know if any problems are experienced and of course any suggestions for improvements to existing products or new products are most welcome.

25. 25 PART NUMBERS Description Part Number Steri - Trac Monitor Body - Ethylene Oxide ST1 - EMON Steri - Trac Monitor Body - Hydrogen Peroxide ST1 - HMON Steri - Trac Monitor Body - Ozone ST1 - OMON Steri - Trac Monitor Body - Peracetic Acid ST1 - PMON Steri - Trac Intrinsically Safe Area Monitor for Ethylene Oxide ST2 - ISEMON Steri - Trac Intrinsically Safe Area Monitor for Hydrogen Peroxide ST2 - ISHMON Steri - Trac Intrinsically Safe Area Monitor for Ozone ST2 - ISOMON Steri - Trac Intrinsically Safe Area Monitor for LEL ST2 - LELMON Steri - Trac Remote Mounted Sensor Kit ST1 - RSM Steri - Trac Remote Display Ethylene Oxide: ST1 - ERD Hydrogen Peroxide: ST1 - HRD Ozone: ST1 - ORD Steri - Trac DAQ Package Incl.: Computer, ChemDAQ Software, Printer ST1 - DAQ Remote Video Display ST1 - RVD Steri - Trac to 9 pin serial port Cable Contact ChemDAQ Steri - Trac Configuration Software Contact ChemDAQ

21. 21 TROUBLESHOOTING G UIDE The Troubleshooting Table below lists the symptoms, possible causes, and recommended solutions for common problems that may be encountered with the Steri - Trac monitor. If your problem is not listed, or none of the solutions solves your problem, please contact ChemDAQ. Problem Possible Cause Suggested Corrective Action No Display Power Off Check power is supplied to monitor Display shows non - numeric characters Instrument fault Contact ChemDAQ The monitor display is showing a non - zero reading The target gas is present in the air Take appropriate remedial action There is an interferent gas in the air Filter needs to be replaced, contact ChemDAQ customer service Small signals absent target or interferent gas can be due to sensor drift. Adjust zero (only perform if certain that there are no interferent or target gases present) DAQ shows communications error on one or more channels Break in communications between the DAQ and the monitor network for that ch annel Check connections Sensor module LED is red Sensor due for calibration Contact ChemDAQ for replacement sensor Small negative readings Sensor zero drift Reset through Magic Button.™ Other questions If there are any other questions about the Steri - Trac monitor, please call ChemDAQ customer service and we will do ou r best to answer them as soon as we can.

20. 20 correctly with reliable test gas. Since ChemDAQ specializes in detection of ste rilant gases, which are generally very reactive, factory calibration not only is the least burden on the end user, but is also the most reliable method for ensuring reliable calibration. Cleaning The ChemDAQ monitor may be cle aned by wiping with a damp cloth. Avoid using any solvent based cleaners or other harsh chemicals. CAUTION - Do not expose the unit to splashing, spraying, or dripping water, otherwise, damage to the internal components may result. Service Contact When factory service is required, contact ChemDAQ Incorporated Service Department at (800) 245 - 3310. Ext. 310, or EMAIL techsupport@chemdaq.com. The shipping address for service is: Service Department ChemDAQ Incorporated Service/Repair 300 Business Center Drive Pittsburgh, PA 152 0 5 Emergency Response ChemDAQ is not able to recommend specific actions to be taken in the event that the ChemDAQ Gas Monitoring System initiates an alert o f a potential exposure. The emergency procedures will vary from location to location and will be described in each site’s emergency action plan as prescribed by OSHA . The ChemDAQ Gas Monitoring System provides a key element in ensuring the safety of person nel working with toxic gases and it is important that the Emergency Action Plan be updated to as to incorporate what actions should be taken in the event of an alarm. These actions may include remedial functions or evacuation depending on gas concentration s and will depend on the policy of that particular facility. The Emergency Action Plan should also describe what steps should be taken to assure that the environment is safe before resuming normal activities after a gas exposure alert .

8. 8 ChemDAQ Data Acquisition System (DAQ ) Using proprietary ChemDAQ software, this PC - based module provides continuous, real - time display of the current concentration levels for each area monitored, as well as the calculated 15 - minute and 8 - hour time - weighted averages. A unique feature exclusive to the ChemDAQ Sterilant Gas Monitoring Module is user adjustable impending alarm settings. These alarms provide an early warning of escalating concentration levels relative to OSHA requirements. All data is stored for subsequent recall, at any time, in r eport form. The ChemDAQ Sterilant Gas Monitoring Module is fully compatible with signals sent continuously and simultaneously from up to eight Area Monitors. The ChemDAQ supplied PC, touch - screen monitor, and printer are preconfigured for operation with t he data acquisition software. Up to eight Steri - Trac monitors can be connected to ChemDAQ’s proprietary data acquisition system (DAQ). The monitors can also be configured through the DAQ computer. See discussion below and DAQ manual for further informatio n. Remote Video Display The image from the PC monitor can be mirrored on an optional ChemDAQ supplied remote video display. This is beneficial for the employees working in areas such as Sterile Processing Wrap and Pack because they can see the exact same thing as the SPD manager where they are working. Contact ChemDAQ Inc. for additional information about the remote video display. PARTS OF THE MONITOR The Steri - Trac monitor comes in three parts: Monitor B ody , S ensor M odule and Wall Box The M onitor Body is the heart of the instrument; it includes the visual display, auditory alarms and signal processing circuitry. T he Monitor Body Attaches to the Wall Box . The main bo dy of the monitor contains a large tri - color display that shows the real time gas reading. If the concentration of gas is below a safe threshold, then the display shows the value in green. If the gas concentration is above a pre -

2. 2 Safety and Legal Notices SAFETY : THIS MANUAL MUST BE CAREFULLY READ BY ALL INDIVIDUALS WHO HAVE OR WILL HAVE THE RESPONSIBILITY FOR INSTALLING, USING OR SERVICING THIS PRODUCT. LIKE ANY PIECE OF COMPLEX EQUIPMENT, THIS PRODUCT WILL PERFORM AS DESIGNED ONLY IF INSTALLED, USED AND SERVICED IN ACCORDANCE WITH THE MANUFACTURER'S INSTRUCTIONS. OTHERWISE, IT COULD FAIL T O PERFORM AS DESIGNED AND PERSONS WHO RELY ON THIS PRODUCT FOR THEIR SAFETY COULD SUSTAIN SEVERE PERSONAL INJURY OR DEATH. The warranties made by ChemDAQ Incorporated with respect to these products are voided if the products are not installed, used and se rviced in accordance with the instructions in this manual. Please protect yourself and others by following them. We encoura ge our customers to write or call regarding this equipment prior to use or for any additional information relative to use or repair s. Warranty : Seller warrants that this product will be free from mechanical defect or faulty workmanship for a period of twelve (12) month s from the date of shipment, provided it is maintained and used in accordance with seller's instructions and/or recom mendations. This warranty does not apply to expendable or consumable parts whose normal life expectancy is less than one (1) year. The seller shall be released from all obligations under this warranty in the event repairs or modifications are made by per sons other than its own or authorized service personnel or if the warranty claim results from physical abuse or misuse of the product. No agent, employee or repre sentative of the seller has any authority to bind the seller to any affirmation, representati on or warranty concerning this product. Seller makes no warranty concerning components or accessories not manufactured by the seller, but will pass on to the purchaser all warrantie s of manufacturers of such components. THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED OR STATUTORY, AND IS STRICTLY LIMITED TO THE TERMS HEREOF. SELLER SPECIFICALLY DISCLAIMS ANY WARRANTY OF MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR PURPOSE. Exclusive Remedy: It is expressly agreed that Purchaser' s sole and exclusive remedy for breach of the warranty set forth therein, for any tortious conduct of Seller, or for any other cause of action, shall be the repair and/or replacement (at Seller's option) of any equipment or parts thereof, which after exami nation by seller is proven to be defective. Replacement equipment and/or parts will be provided at no cost to Purchaser, F.O.B. Seller's customer service facility. Failure of Seller to successfully repair any nonconforming product shall not cause the rem edy established hereby to fail of its essential purpose. Exclusion of Consequential Damages: PURCHASER SPECIFICALLY UNDERSTANDS AND AGREES THAT UNDER NO CIRCUMSTANCES WILL SELLER BE LIABLE TO PURCHASER FOR ECONOMIC, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DA MAGES OR LOSSES OF ANY KIND WHATSOEVER, INCLUDING BUT NOT LIMITED TO, LOSS OF ANTICIPATED PROFITS AND ANY OTHER LOSS CAUSED BY NONOPERATION OF THE GOODS. THIS EXCLUSION IS APPLICABLE TO CLAIMS FOR BREACH OF WARRANTY, TORTIOUS CONDUCT OR ANY OTHER CAUSE OF ACTION AGAINST THE SELLER. Information in this document is subject to change without notice. No part of this document may be reproduced or transmitted w in any form or by any means, electronic or mechanical for any purpose without express permission of ChemDAQ Inc. ChemDAQ has patent s or pending patent applications, trademarks copyrights and other intellectual property rights covering this subject matter in thi s document. The furnishing of this document does not give you license to these patents, trademarks, copyrights, or other intel lectual property except as expressly provided in any written license agreement from ChemDAQ Inc.

5. 5 CONTENTS Page OVERVIEW OF THE CHEMDAQ GAS MONITORING SYSTEM ................................ ........................ 6 Steri - Trac Monitor ................................ ................................ ................................ ................................ ... 6 Steri - Trac Remote Display ................................ ................................ ................................ ...................... 7 ChemDAQ Data Acquisition System (DAQ) ................................ ................................ .......................... 8 Remote Video Display ................................ ................................ ................................ ............................. 8 PARTS OF THE MONITOR ................................ ................................ ................................ ....................... 8 Sensor M odule Remote Mount ................................ ................................ ................................ ................ 9 Display and Horn ................................ ................................ ................................ ................................ ... 10 INSTALLATION ................................ ................................ ................................ ................................ ...... 11 Customer Installation Responsibilities ................................ ................................ ................................ .. 11 Power Supply Requirements ................................ ................................ ................................ ............. 11 Si gnal Cables ................................ ................................ ................................ ................................ .... 11 Mounting Wall boxes ................................ ................................ ................................ ........................ 11 Relays ................................ ................................ ................................ ................................ ................ 12 Remote Display ................................ ................................ ................................ ................................ . 12 DAQ ................................ ................................ ................................ ................................ .................. 14 Remote Mounted Sensor ................................ ................................ ................................ ................... 14 ChemDAQ’s Installation Responsibilities ................................ ................................ ............................. 15 Installation of Steri - Trac and PointGard (II) Monitors in Same System Error! Bookmark not defined. CONFIGURATION OF MONITOR ................................ ................................ ................................ ......... 15 Alarm - High Level Adjust ................................ ................................ ................................ ............... 15 Alarm - Low Level Adjust ................................ ................................ ................................ ................ 15 Horn Volume ................................ ................................ ................................ ................................ .... 15 Zero Adjust ................................ ................................ ................................ ................................ ....... 15 Acknowledge ................................ ................................ ................................ ................................ .... 15 Latch ................................ ................................ ................................ ................................ ................. 16 Altitude ................................ ................................ ................................ ................................ ............. 16 HOW TO CHANGE CONFIGURATIONS WITH MAGIC BUTTON™....................................16 Low Alarm, High Alarm.......................................................................................16 Horn Volume, Zero Adjust....................................................................................16 MAINTENANCE ................................ ................................ ................................ ................................ ...... 18 Calibration ................................ ................................ ................................ ................................ .............. 18 Cleaning ................................ ................................ ................................ ................................ ................. 20 Service Contact ................................ ................................ ................................ ................................ ...... 20 EMERGENCY RESPONSE ................................ ................................ ................................ ...................... 20 TROUBLESHOOTING GUIDE ................................ ................................ ................................ ............... 21 SPECIFICATIONS ................................ ................................ ................................ ................................ .... 22 PART NUMBERS ................................ ................................ ................................ ................................ ..... 25 APPENDIX A: REMOTE SENSOR WIRING DIAGRAM.....................................................24 APPENDIX B: REMOTE DISPLAY WIRING DIAGRAM...................................................25 CONTACTING CHEMDAQ ................................ ................................ ................................ .................... 26

19. 19 For those sensors that have chemical filters (for example the ethylene oxide sensors uses ChemDAQ’s patent pending Spot - On™ chemical filter to prevent false alarms from alcohols and carbon monoxide), these filters are consumab le and so are usually replaced at the same time that the sensor is calibrated. In addition, the module has other components that age such as the rechargeable batteries. These components will also be evaluated during each calibration cycle to ensure that th e sensor modules give the best possible performance. Is Calibration Difficult? No - ChemDAQ has a program called the Sensor Exchange Program (SXP), under which ChemDAQ will periodically send out freshly calibrated sensor modules to end users. ChemDAQ moni tors are designed so that instead of calibrating the monitor on - site, the sensor module is pulled off and a freshly calibrated and verified sensor module is snapped in. The calibration process can thus be done in a few seconds and is no more difficult tha n changing a light bulb. The old sensor module is then returned to ChemDAQ in the pre - paid shipping box that the fresh module arrived in. How Often Should I C alibrate My ChemDAQ Monitor? The sensors used in the Steri - Trac sensor module provide the best per formance availab le for a monitor of this type. The calibration interval is b ased on our experience with these sensors; for example ChemDAQ recommends that ethylene oxide, hydrogen peroxide , and peracetic acid sensor modules be recalibrated every four month s for normal use. If a sensor has been used in a particularly harsh environment, or has been exposed to very high concentrations of the target gas, or high concentrations of other gase s or vapors then the sensor should be recalibrated. Non - routine calibrat ion can be arranged through ChemDAQ’s customer service. Do I have to Track the Calibration Status of All of My Monitors? No - ChemDAQ tracks when every sensor module is replaced and ChemDAQ personnel contact user s when their sensors are due to be recalibrated. This service eliminates the need for the customer to develop in - house tracking means. Why Does ChemDAQ Calibrate the Sensor Modules Instead of Customer On - Site Calibration? The traditional way of calibrati ng gas monitors is for the manufacturer to supply portable compressed gas cylinders, a regulator and tubing to the customer and tell them to calibrate the monitor. On - site calibration typically involves applying zero air (hydrocarbon free air) to the senso r for several minutes to record the baseline followed by span gas (test gas with a known concentration of the sensor’s target gas) again for several minutes . The calibration process is time consuming and the calibration gases are expensive. In our experi ence, most customers dislike the calibration process and are often frustrated especially by the more reactive gases. The more reactive the gas, the lower the detection limits at which it needs to be detected and so the lower the concentration that must be used to calibrate the sensor and the more susceptible the calibration to errors due to adsorption or other loss of target gas. ChemDAQ’s goal is to make gas detection as simple as possible for the end user and most users much prefer to simply snap in a fr esh sensor module rather than mess with on - site calibration. Furthermore, by calibrating all the sensor modules in - house , ChemDAQ can ensure that the calibrations are performed

11. 11 an alarm threshold again. Thus i f the gas concentration were to fall below a threshold and rise back up, or if the gas concentration were to rise from below to above the higher alarm threshold then the horn would reactivate again. INSTALLATION The Steri - Trac monitor is designed to be wall mounted and provide area monitoring for toxic gases. The customer needs to perform site preparation before ChemDAQ can install, configure and test the Steri - Trac system. Site preparation includes: providing power to the Steri - Trac monitors and other components ; routing signal cables between the system components and preparing mounting locations for the equipment . ChemDAQ is responsible for installation of the monitor, connection to the wiring installed by the customer and system turn up, configuration and verification. Please refer to the Steri - Trac Installation Guide for a complete, step - by - step site - preparation instructions. Customer Site Preparation Responsibilities Environment The Steri - Trac monitor should be wall mounted in an environment that is b etween - 20 to + 50 o C, free from excessive vibration and away from condensing humi dity. Power Supply Requirements 100 - 24 0 V, 0 .75A, 50/60 Hz mains power must be supplied to the location where the wall box is to be mounted. The wall box is designed to be hard - wired to the electrical supply, but it can be plugged into a regular outlet by means of an optional cable. It is recommended that the power supply be an emergency power circuit to ensure that monitoring c ontinues to be effective even if there is a power outage. IMPORTANT NOTE: Please observe the following requirements when hard - wiring the Steri - Trac monitor: ► Required w ire: 14 AWG stranded , SJ or SJO . (Larger gauge wire might not fit into the connectors in the wall box.) ► The ground wire must be earth - grounded. ► You must install a mechanism for turning off power to the area monitor. You can either install a switch close to the monitor or you can connect the area monitor(s) to their own circuit breaker (15 Amp). The circuit breaker must be within a reasonable distance to the monitors. Signal Cables The cables used for interconnecting components of the Steri - Trac detection system must meet the requirements of the TIA/EIA - 56 8 - B standard (CAT5) , or equivalent . Mounting Wall Box The wall mount should be mounted in the normal breathing zone for personnel in that area. For most locations this corresponds to mounting the wall boxes approximately five feet (~1.5 m) above floor level. The wall boxes are typically screwed to the wall using wall ancho rs and #6 screws. The customer’s electricians should connect the power and signal cables to the terminal block in the wall box as is shown in F1 .

14. 14 DAQ The DAQ requires a dedicated location where main powers is available ; and is often placed in the supervisor’s office . The DAQ is a Windows® 1 based computer and so the environmental requirements are similar to other desk top computers. In general, the DAQ should be located indoors, away from condensing humidity. The DAQ requires external power (110/220 V, 60/50 Hz) . Remote Mou nted Sensor The Steri - Trac monitor is a small compact instrument, but for some applications an even small er sensor device is required very near the source of the potential hazardous gas exposure . In these applicati ons, the sensor can be remotely mounted and the monitor body can then by mounted nearby at a more convenient location. Mounting the sensor remotely is very simple! The sensor mount is attached to the surface where it is needed. Attachment may be via screws using the built in key - holes in the back of the sensor mount for mounting to a vertical wall surface . Some surfaces are unsuitable for screw attachment or a vertical mounting surface is not available. For these applications , the Remote Sensor can be attached to flat horizontal surfaces with Velcro® 2 or similar atta chment material. The signal cable feeds into the back of the remote mount and is connected to the monitor via the Wall Mount. as is shown in Figure 3 above . Once the sensor mount has been placed where needed, the monitor body can be mounted and powered on a nearby wall as described earlier. The cable from the rear of the sensor mount can then be run back to the monitor body and connected via the wall box (screw terminals). The sensor module is then snapped into place on the sensor mount and the monito r is then ready for service. When it is time for the sensor module to be recalibrated, the old sensor module is removed and the new one snapped into place, in similar manner to plugging the sensor module in the monitor body. 1 Windows® is a trademark of Microsoft Corporation 2 Velcro is a registered trademark of Velcro Industries B.V. Remote Sensor Mount (Front) Shown with Sensor Remote Sensor Mount (Top and Back) Without Sensor Mounting Key - Hole

26. 26 APPENDIX A Remote Sensor Wiring Detail V + Sens + Sens - Gnd 1 3 4 2 Blue Indicates Signal Wiring ( RS - 485 ) Thick Red Indicates power wires, 15VDC . Remote Sensor Wiring Diagram Power/Signal cable available from ChemDAQ To Area Monitor

15. 15 ChemDAQ’s Installation Respon sibilities Final installation of the monitors, remote display, and DAQ, initial configuration and verification of system operation will generally be performed by ChemDAQ authorized personnel in or der to ensure that the gas monitoring system is installed and functioning correctly and operating to the customer’s satisfaction. CONFIGURATION OF MONITOR The monitor is designed for simple installation and use and comes with factory defaults to the most commonly used settings. If the configuration settings need to be changed, there are two means to doing so. The easiest way to configure the monitor is through the DAQ or through another PC connected to the se rial port in the wall box. The other method is through the Magic Button™ (Alarm Silence Button) on the front of the monitor. To initiate configuration from the DAQ computer, please refer to the ChemDAQ Computer Module Manual . For instructions on using the Magic Button™, see the instructions beginning on p. 16. Configuration Options Alarm - High Level Allows you to adjust the high level alarm set point. The high level alarm must be higher or equal to the low level alarm. Alarm - Low Level Allows you to adjust the low level alarm set point. Horn Volume The horn volume is adjustable to allow for different background noise levels in various locations. The horn volume can be adjusted between approximately 75 and 100 decibels, measured at a distance of one foot. Zero Adjust Allows you to adjust the zero reference point of the sensor when no target ga s is present, such as during calibration. This parameter should only be adjusted if the user is certain that there is no target or interferent gas present. The zero can only be adjusted within narrow limits to allow a minor offset to be corrected but not s o much as to potentially compromise the alarm response. The following configuration options c an o nly be a djusted through the DAQ Computer or through another PC hooked up to the serial port of the area monitor. Acknowledge If the monitor is set to Acknowledge Yes, the user can silence the alarm horn by pressing the acknowledge button on the monitor. This is the default setting. If the monitor is set to Acknowledge No, the monitor alarm cannot be silenced manually. The alar m will only silence when the target gas level drops below the alarm level.

10. 10 voltage electrical connections out to the remote displays, signal connections for the DAQ c omputers, and dry relay contacts that respond to alarm conditions . Cables are usually brought to the wall box via conduit from above, but the wall box is de s igned to accommodate other orientations as well. Please see the Steri - Trac Installation Guide for a complete description. Relays in the Wall Box: The wall box contains dry relay contacts which open or close when the monitor alarms. These contacts can be used to send a signa l to a central alarm system or to activate other systems such as exhaust fans. There is a set of contacts for the low level alarm and a set for the high level alarm. The normally open contacts are energized open when conditions are normal, and close during alarm conditions. The normally closed contacts are energized closed when conditions are normal, and open during alarm conditions. The power supply in the wall box accepts either a 110 or 220 V AC supply at 50/60 Hz and provides power to the instrument together with up to three remote d isplays . Major Components of the Steri - Trac Monitor Display and Horn  Display – Four digit ultra - bright 5x8 Tri - Color LED blocks that show the gas concentration in parts per million (ppm). When the gas concentration is at safe levels (determined by user - defined thresholds) , the display is steady green. When the first user - defined alarm threshold is met the display shows the real time gas concentration in orange to indicate the higher level or alert. When the gas concentration exceeds the user - defined second alarm threshold the display turns to red and flashes the real time gas concentration to alert all users of the dangerous situation.  Horn – The Steri - Trac includes an 85 dB horn that produces a loud cycling horn to notify users that the gas concentration is above the first alarm threshold. Alarm Silence Button Pressing the alarm silence button silences the alarm if the instrument is in alarm. The default setting is that th e alarm will stay silent so long as the gas concentration does not rise through Sensor Module Monitor Body LED Display Alarm Silence / Menu Button Horn

6. 6 OVERVIEW OF THE CHEMDAQ GAS MONITORING SYSTEM The ChemDAQ Gas Monitoring System comprises several modular components, including a Steri - Trac monitor, remote displays, DAQ data acquisition system, and remote video display. The Steri - Trac monitor is designed to operate as a stand alone instrument, but it is also designed to serve as a part of an integrated monitoring system. Up to eight Steri - Trac monitors can be connected to a central data acquisition computer (DAQ), and each Steri - Trac monitor can support up to three remote displays. The system has been designed to be fail safe, so that in the unlikely event that one component were to fail, the re st of the system will continue to operate normally. For example, the DAQ and all of the monitors are in constant two way communication. If this communication is broken, then the DAQ will show a communication error , but the monitors will continue to work normally. Steri - Trac Area Monitor The Steri - Trac area monitor is the key component of the ChemDAQ Gas Monitoring System. The monitor is wall mounted and cons ists of three major components – the monitor body, the sensor module and the wall box. Sensor Module Wall box Monitor Body Area Monitor Remote Display ChemDAQ (DAQ) Computer Module Remote Video Display

24. 24 Remote Display Output RS485 Supply Voltage 100 - 240 VAC, .75A, 50/60 Hz Hot Swap Sensor Module Yes Remote Mount Sensor Module Capability Yes Local PC Connection (serial port on area monitor) RS - 232 , RS - 485

9. 9 set L ow A larm level), but n ot yet at dangerous levels, then the display shows the real time concentration in yellow and if the gas concentration exceeds concentration at which it is dangerous ( H igh A larm level), then the display is red. LED Display  Has four 1.2 - inch high characters, each is a 5 X 7 dot array  Tri - color display – green for normal operation, yellow on low alarm and red on high alarm or fault.  Updates every second to give real time ppm gas concentrations. The monitor body also contains a loud alarm horn on the front face of the monitor body, that is activated whenever the gas concentration exceeds the low alarm level. The alarm can be silenced by pressing the alarm silence button, also located on the front of the monit or. The display continues to show the real - time gas concentration (and alarm indication via display color and flash) even after the horn has been silenced. Horn  Simple beep indicates low alarm, continuous sound indicates high alarm  Horn can be silenced by pressing alarm silence button The Sensor module contains an electroch emical gas sensor and for certain gases, ChemDAQ’s Spot - On™ Filter that makes the sensor much more specific to the target gas which results fewer false alarms. This proprietary filter removes common interferents which , for example , for ethylene oxide monitors are alcohols and carbon monoxide. The innovative patent - pending sensor module also contains the drive circuit for the sensor including an on - board battery to eliminate warm - up t imes that are otherwise common with electrochemical sensors. In addition, the sensor module contains an EEPROM memory that stores the sensor’s calibration and configuration data. I n order to ensure reliable calibration of the sensor, the sensor module is a replaceable component and is periodically returned to ChemDAQ for replacement with a freshly calibrated sensor module. Remote Sensor Module Typically, the sensor module is attached directly to the monitor . In certain cases, such as space or weight constraints , the option to remotely mount the sensor becomes very valuable. The remote sensor module can be used to position the sensor up to 100 feet from the monitor The Wall Box The wall box provides mechanical attachment of the Steri - Trac monitor to a wall. The wall box contains connection points for AC power wiring , a power supply which converts the AC to 15VDC, the low

16. 16 The display will continue to show the real time gas reading whether the horn is acknowledged or not. Latch Enables configuration of the low level alarm and the High Level Alarm to latching or non - latching status. Latching means that once the alarm level is reached, the system will remain in alarm status even if the gas concentration subsequently drops below the alarm level. In non - latching mode, the alarm status goes away if the gas concentration drops below the alarm level. See Acknowledge section above for further explanation. Altitude The response of most electrochemical sensors is proportional to absolute concentration (mg /l) and not the rela tive concentration (% vol., ppm or ppb). The sensitivity, of the sensor, therefore depends on the altitude of the monitor since the sensitivity is a function of atmospheric pressure. The altitude is usually a one - time configuration setting that is made at the time of installation of the mo nitor. If the monitor is not moved to a vastly different location, then th e altitude need never be change d again. If the altitude is not set, then the monitor will use the default value corresponding to sea level. The altitude can be entered in feet. CHA NGING CONFIGURATION SETTINGS USING THE MAGIC BUTTON ™ You can use the magic button to access the area monitor’s configuration menu. The following settings can be changed using the magic button: Low alarm setting, high alarm setting, horn volume, and zero ad just. Adjusting the Low Alarm Setting Using the Magic Button: Use this adjustment to choose the gas level in parts per million (ppm) when the low alarm will sound. Note: Once you enter the configuration menu, if the monitor detects no button presses for five seconds, it will exit the menu and return to the main display. 1. To enter the configuration menu, press and hold the Magic Button™ until you see MENU on the main display. Then release the button. 2. Press and hold the button to cycle through the sub menus . The display will repeat cycling through the sub menus as long as you hold down the button. When you see LALM displayed, release the button. 3. Press and hold the but ton. The alarm setting will increase in value. Release the button when you see the value you want. (To alternate between increasing or decreasing the setting, release the button and then press and hold again .) 4. If the monitor detects no button presses for five seconds, the monitor will exit the configuration menu , and then it will display in sequence the low alarm setting, high alarm setting, and the horn volume. The monitor will then return to the main display. Your alarm level adjustment has been saved. Adjusting the High Alarm Setting Using the Magic Button: Use this adjustment to choose the gas level in parts per million (ppm) when the high alarm will sound.

18. 18  The zero - adjust function should only be performed when there is no target gas present in the area. Do not perform the zero adjust function, for example, while sterilizers are in operation.  After a calibrated sensor has been installed, wait two minutes before performing the zero - adjust function. This allows time for the sensor to settle. Even if the monitor is reading 0.0ppm, you should perform the zero - adjust function. The zero - adjust function is performed after a calibrated sensor has been newly installed. Once the sensor has settled, and there is no target gas in the area, perform the zero - adjust function - even if the monitor is reading 0.0ppm . This corrects the readin g to compensate for environmental factors . Instructions for performing the zero - adjust: Note: Once you enter the configuration menu, if the monitor detects no button presses for five seconds, it will exit the menu and return to the main display. 1. To ent er the configuration menu, press and hold the Magic Button™ until you see MENU on the main display. Then release the button. 2. Press and hold the button to cycle through the sub menus. The display will repeat cycling through the sub menus as long as you hold down the button. When you see ZERO displayed, release the button. 3. With ZERO displayed, press the button once . The monitor will go through its zero - adjust function and will flash in green Z0.0. 4. After a few seconds, the monitor will display in sequence the low alarm s etting, high alarm setting, the horn volume, then it will display Z0.0. If the Z0.0 is GREEN , the zero adjust was successful. ( If the Z0.0 is RED , the zero - adjust was NOT successful. Call your ChemDAQ service repres entative.) 5. The monitor will t hen return to the main display. MAINTENANCE : Calibration Why Calibrate the monitor? The Steri - Trac monitors require periodic calibration as do all gas detection monitors. Calibration serves two basic functions, the first o f which is to periodically check the sensor to make sure that it is functioning correctly. The second role of calibration is to adjust the output of the monitor so that it accurately reflects the actual gas concentration that the monitor is exposed. Calibration involves the application of a known concentration of test gas to the sensor and me a suring the response from the sensor. The correct function of the sensor is verified by checking that the response characteristics fall within the specifications for that sensor module. The sensor response is then used to calculate a calibration coefficien t which is written to the EEPROM memory in the sensor module. When the sensor module is installed in the Steri - Trac monitor body, the monitor uses this calibration coefficient to adjust the digital gain of the monitor so that the display reading reflects t he actual gas concentration.

17. 17 Note: Once you enter the configuration menu, if the monitor detects no button presses for five seconds, it will exit the menu and return to the main display. 1. Note: Once you enter the configuration menu, if the monitor detects no button presses for five seconds, it will exit the menu and return to the main display. 2. To enter the configuration menu , press and hold the Magic Button™ until you see MENU on the main display. Then release the button. 3. Press and hold the button to cycle through the sub menus. The display will repeat cycling through the sub menus as long as you hold down the button. When yo u see HALM displayed, release the button. 4. Press and hold the button. The alarm setting will increase in value. Release the button when you see the value you want. (To alternate between increasing or decreasing the setting, release the button and then pres s and hold again .) 5. If the monitor detects no button presses for five seconds, the monitor will exit the configuration menu, and then it will display in sequence the low alarm setting, high alarm setting, and the horn volume. The monitor will then return to the main display. Your alarm level adjustment has been saved. Adjusting the Horn Volume Using the Magic Button: You can adjust the horn volume on a scale from 1 (lowest volume) to 8 (highest volume). The horn will sound as the value changes. Note: Once you enter the configuration menu, if the monitor detects no button presses for five seconds, it will exit the menu and return to the main display. 1. To enter the configuration menu, press and hold the Magic Button™ until you see MENU on the main display. Th en release the button. 2. Press and hold the button to cycle through the sub menus. The display will repeat cycling through the sub menus as long as you hold down the button. When you see HVOL displayed, release the button. 3. Press and hold the button. The alarm setting will gradually increase in value. Once the value reaches 8, the cycle returns to 1 and increments again. Release the button w hen you see the value you want to select. 4. If the monitor detects no button presses for five seconds, the monitor will exit the configuration menu, and then it will display in sequence the low alarm setting, high alarm setting, and the horn volume. The monitor will then return to the main display. Your horn volume adjustment has been saved. Using the Magic Button™ to Perform the Zero - Adjust Function Important Warnings Regarding the Zero - Adjus t Function:  The zero - adjust function is intended to be used only after a calibrated sensor has been newly installed. Using the zero - adjust function for any o ther purpose could seriously degrade the accuracy of the area monitor ’s readings .

12. 12 Figure 1 showing terminal block connections for wall box. It is anticipated that in most cases, the cables will be fed to the wall mount via conduit from the ceilin g. As an alternative, t he wall box is designed to allow the cable to be fed from the right side or from and existing electrical box that is mounted inside the wall . The Steri - Trac Installation Guide fully explains these options. Relays The Steri - Trac Wall Box includes two single pole, double throw relays that are respectively activated (de - energized ) when the monitor is in the low and high alarm states. These relays can be used to interface the monitor with a customer’s instrument panel or for activation of external ventilation. Connection to these relays is made via the terminal block in the Monitor W all Box , as shown in Figure 1 above . Remote Display The remote display is wall mounte d via the key holes in the back. See the Steri - Trac Installation Guide mounting instructions. Sensor Wall Mount Box Wiring Diagram To Remote Display # 3 To Remote Displays # 1 & # 2 . White Jacket Indicates AC Power Wiring . IE : Romex Cable To Remote Cable to DAQ . Optional Cable to Next Area Monitor . Remote Display Wiring Area Monitor Disp V + Disp Gnd Disp + Disp - Remote Display V + Gnd Rx + Rx - Signal/Power Cable Provided by ChemDAQ DAQ Data cable (usually CAT 3; 2 pair) Power wire (V+, Ground) Signal wire (RS 485) Signal/Power Cable Provided by ChemDAQ Optional Relay Outputs Must be earth - grounded

27. 27 APPENDIX B Remote Display Wiring Detail J2 1 3 4 5 6 7 8 2 Gnd V + Tx + Tx - Rx + Rx - Blue Indicates Signal Wiring ( RS - 485 ) Connect Rx To Area Montor * Rx + to Disp + Rx - to Disp - * Tx Connections are for Daisy Chain Option of Remote Displays Tx + from First Display to Rx + of second in chain . Tx - from First Display to Rx - of second in chain . Remote Display Wiring Area Monitor Disp V + Disp Gnd Disp + Disp - Remote Display V + Gnd Rx + Rx - Remote Display Wiring Diagram Thick Red Indicates power wires, 15VDC Power/Signal cable available from ChemDAQ To Area Monitor

13. 13 The Steri - Trac monitor’s internal power supply can support up to three remote displays connected in a star or daisy - chain configuration. Power and data is transm itted from the monitor to the remote display through a single power/signal cable available from ChemDAQ. See Figure 2 for the wiring diagram. Figure 2 showing terminal block connections in the Remote Display J2 1 3 4 5 6 7 8 2 Gnd V + Tx + Tx - Rx + Rx - Blue Indicates Signal Wiring ( RS - 485 ) Red wires = power 15 VDC . Connect Rx To Area Montor * Rx + to Disp + Rx - to Disp - * Tx Connections are for Daisy Chain Option of Remote Displays Tx+ from First Display to Rx+ of second in chain. Tx - from First Display to Rx - of second in chain. Remote Display Wiring Area Monitor Disp V + Disp Gnd Disp + Disp - Remote Display V + Gnd Rx + Rx - Remote Display Wiring Diagram Signal/Power Cable available from ChemDAQ From Area Monitor

23. 23 Performance Criterion Ethylene Oxide (ETO) Hydrogen Peroxide (H 2 O 2 ) Ozone (O 3 ) Peracetic Acid PAA) Oxygen (O 2 ) Combustible (LEL) Sensor Principle Electroch emical Electrochemi cal Electrochemi cal Electrochemi cal Electrochemi cal IR Range 0 – 50 ppm 0 – 20 ppm 0 to 5 ppm 0 - 3 ppm 0 - 25 % vol 0 - 100% LEL Accuracy 3 10% 10% 5% 5% 1% 5% Calibration Interval 4 months 4 months 4 months 4 Months 12 Months 4 6 Months Calibration Interval 4 months 4 months 4 months 4 Months 12 Months 5 6 Months Resolution 0.1 ppm 0.1 ppm 0.02 ppm 0.01 ppm 0.1% vol 1% LEL Temperature Range - 20 to + 50 o C, ( - 4°F to 122°F) 0 to + 50 o C, (32°F to 122°F) - 20 to + 50 o C, ( - 4°F to 122°F) - 20 to + 50 o C, ( - 4°F to 122°F) - 20 to + 50 o C, ( - 4°F to 122°F) - 20 to + 50 o C, ( - 4°F to 122°F) Pressure Range (steady state) Atmosphe ric +/ - 10 % Atmospheric +/ - 10 % Atmospheric +/ - 10 % Atmospheric +/ - 10 % Atmospheric +/ - 10 % Atmosphe ric +/ - 10 % Response Time (T 90 (s)) < 140 < 150 < 150 <120 <30 <120 Relative Humidity 15 to 95 % non - condensin g. Dew Point > 0 o C 15 to 95 % non - condensing Dew Point > 0 o C 15 to 95 % non - condensing 15 to 95 % non - condensing Dew Point > 0 o C 15 to 95 % non - condensing 15 to 95 % non - condensin g Repeatability: Greater of X or 5% of signal. X = 0.2 ppm 0.2 ppm 0.02 ppm 0.02 ppm 0.2 % vol. 2 % LEL Output Linear Linear Linear Linear Linear Linear Spot - On® Filter Yes Not needed Not Needed Yes Not Needed Not Needed Sensor Module Battery Life (Weeks) 2 Warm - up Time (s) on Installation of New Sensor <60 Seconds Relay Outputs 2 Communication Output RS485 3 Relative to calibration gas 4 Sensor replacement 5 Sensor replacement

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