In the past few years, there has been a lot of media attention brought to carbon monoxide (CO), as well as carbon dioxide (CO2) and their affect on occupied spaces and indoor air quality. Both are colorless and odorless gases that can have a negative impact on building occupants. However, be sure you know what […]
Read PostMonth: July 2014
Q: The intrinsic safety spec I’m reading calls for an isolated ground. Isolated from what?
Answer: A true isolated ground is not connected to any ground that can ever carry fault current from unrelated parts of the electrical system. It is best to run it directly to grounded building structural steel, an underground metal water pipe, or a separate grounding electrode from the building electrical service as described in Article […]
Read PostTemperature Sensor Curve ID Numbers
Need help figuring out what type sensor you need for your automation system? This handy temperature curve chart might help. If not, give Kele a call! Sensor Type Temperature Sensor Description Typical Sensor User 3 10,000Ω @ 77°F, Type III material AET, American Automatrix, Andover, Carrier, Delta, Invensys, Teletrol, York 21 2252Ω @ […]
Read PostTime Delay Relay Functions Explained
Understanding the differences between various time delay relay operations such as On-Delay or Interval can be a bit confusing. These simple diagrams may make it easier to visualize what’s happening during the timer operation(s). At Kele, our goal is to make product selection and usage as easy as […]
Read Post
