This week Paul Daniel answers a post-seminar question about monitoring using redundant sensors and multiple systems, both Continuous Monitoring and Building Management systems.
We received this question by email:
I attended one of your seminars on Continuous Monitoring Systems and we use many Vaisala Temp/RH devices. These devices are currently connected to our Continuous Monitoring System - viewLinc. However, we also have a Building Management System that has less robust sensors.
The question I have is twofold:
Thanks for your answers!
First off, thank you for attending our seminar!
Certain Vaisala devices can communicate with multiple systems simultaneously. However, if you want to communicate with a Vaisala continuous monitoring system and a non-Vaisala system, such as a Building Management System (BMS), then you must use Vaisala DL-series Data Loggers.
These data loggers can communicate with multiple systems via an OPC query. If your sensors are not Vaisala sensors, they can still interface with our system via a Universal Input DL4000 data logger, which will then allow communication with both a Vaisala CMS and your non-Vaisala BMS via OPC.
One of our application engineers can give you details on how this would work in your application. Contact us.
Regarding industry practice, there is no standard for using two redundant sensors, or for using one sensor to communicate data with two separate systems. However in our experience, we have seen both approaches work, so you can do it safely from a GMP perspective.
We recommend that you apply GMP level controls as your would for your monitoring system, rather than defaulting to BMS level controls (that are not generally GMP-compliant). Note that we are not talking about electronic controls, but rather of quality procedures to "control" the system to GMP standards.
Paul Daniel is the Senior Regulatory Compliance Expert at Vaisala. He has worked in the GMP-regulated industries for over 20 years helping manufacturers apply good manufacturing practices in a wide range of qualification projects. His specialties include mapping, monitoring, and computerized systems.
At Vaisala, Paul oversees and guides the validation program for the Vaisala viewLinc environmental monitoring system. He serves as a customer advocate to ensure the viewLinc environmental monitoring system matches the demanding requirements of life science and regulated applications.
Paul also shares his GMP experience through regular blog contributions, webinars, and seminars around the world. Paul’s expertise in the demanding GxP world is applicable to any industry where measurement is critical to product quality. Paul is a graduate of University of California, Berkeley, with a bachelor's degree in biology.
In addition to editing the Vaisala Life Science blog, Janice Bennett-Livingston is the Global Life Science Marketing Manager for Vaisala's Industrial Measurements business area.
Pre-Vaisala writing credits include a monthly column called "Research Watch" for Canada's award-winning magazine alive, as well as articles in Canadian Living and other periodicals. Other past work: copywriting for DDB Canada, technical writing at Business Objects, and communications specialist for the British Columbia Child & Family Research Institute.