Containment is used to contain dirty air from the workspace and prevent it from getting into clean or sterile areas of the building. Containment is typically used during construction in occupied buildings. Proper containment requires airtight containment walls that surround the workspace in conjunction with "negative air machines" that pull a vacuum on the workspace and exhaust air to the outside of the building. The negative pressure ensures that leaks in the containment walls will only result in clean air getting sucked into the workspace and will not allow dirty air to enter the clean/sterile area of the building. For the containment system to be effective a pressure differential of -0.0200 "H2O (or greater) is typically required.
The OmniSense S-17 differential pressure sensor (aka Manometer) is purpose built for containment monitoring. It has two 1/8" hose bar connections one labeled "High" and one labeled "Low". It is typically placed inside the workspace and the "Low" hose barb is left open to the workspace and the "High" hose barb is connected by tubing to the clean/sterile area of the building outside the workspace. The manometer can then measure the pressure differential between the workspace and the sterile/clean area which must always be negative, ie the workspace must always be under a vacuum when measured relative to the sterile/clean area.
The S-17 typically takes 4 readings over a 5 minute time span, averages them and then reports that value to our monitoring server. The averaging is intended to smooth out the impact of a door being opened briefly. Note that a OmniSense gateway is required to use the S-17 in real time monitoring mode. The S-17 does have LCD display which can be used to read the current pressure such that the S-17 can be used in stand alone mode without a gateway or remote monitoring capability.
Once data reaches the server it is stored in the database and compared against any alarm rules you may have created. Typical alarm rules can be "alert me if the pressure goes above -0.0200 "H2O for more than 15 minutes". Note that the "for more than 15 minutes" helps filter out short term violations such as door opening events. Typical alarm rule settings used in a hospital are:
High ON -0.02
High OFF -0.025
Low OFF -1.00 (in other words well below what might ever happen meaning you can never be too negative)
Low ON -2.00
Delay - Chefs choice but should be set to however long you want to allow the door to be propped open. Suggest 7 minutes which means door can be propped open up to 5 minutes, ie one reading can be high but two back to back high readings will trigger alarm
Critical - set this to yes ONLY IF you want to be alerted continuously which will be every "delay" minutes until the problem is cured.
Email settings CAN BE LEFT BLANK as emails ALWAYS got to the job sites "alarm email" address. Use the alarm rule's email settings ONLY IF you have a large job with MANY alarm rules and different people will be tasked with responding to different alarms.
Make sure you name your sensors such that when you get an alert you know which sensor caused it and where you need to go to fix it.
The OmniSense S-17 differential pressure sensor (aka Manometer) is purpose built for containment monitoring. It has two 1/8" hose bar connections one labeled "High" and one labeled "Low". It is typically placed inside the workspace and the "Low" hose barb is left open to the workspace and the "High" hose barb is connected by tubing to the clean/sterile area of the building outside the workspace. The manometer can then measure the pressure differential between the workspace and the sterile/clean area which must always be negative, ie the workspace must always be under a vacuum when measured relative to the sterile/clean area.
The S-17 typically takes 4 readings over a 5 minute time span, averages them and then reports that value to our monitoring server. The averaging is intended to smooth out the impact of a door being opened briefly. Note that a OmniSense gateway is required to use the S-17 in real time monitoring mode. The S-17 does have LCD display which can be used to read the current pressure such that the S-17 can be used in stand alone mode without a gateway or remote monitoring capability.
Once data reaches the server it is stored in the database and compared against any alarm rules you may have created. Typical alarm rules can be "alert me if the pressure goes above -0.0200 "H2O for more than 15 minutes". Note that the "for more than 15 minutes" helps filter out short term violations such as door opening events. Typical alarm rule settings used in a hospital are:
High ON -0.02
High OFF -0.025
Low OFF -1.00 (in other words well below what might ever happen meaning you can never be too negative)
Low ON -2.00
Delay - Chefs choice but should be set to however long you want to allow the door to be propped open. Suggest 7 minutes which means door can be propped open up to 5 minutes, ie one reading can be high but two back to back high readings will trigger alarm
Critical - set this to yes ONLY IF you want to be alerted continuously which will be every "delay" minutes until the problem is cured.
Email settings CAN BE LEFT BLANK as emails ALWAYS got to the job sites "alarm email" address. Use the alarm rule's email settings ONLY IF you have a large job with MANY alarm rules and different people will be tasked with responding to different alarms.
Make sure you name your sensors such that when you get an alert you know which sensor caused it and where you need to go to fix it.
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