Ok folks I posted this problem last spring and I would like to thank each and every one who replied. The problem that I have is yet to be resolved. I have not had to deal with this issue until now so I really need your help.
The Problem: I have a Vitrification furnace that burns oxygen enriched fuel at 2900 F. I have 2ea. Inlet oxygen analyzers that monitor how much O2 is being added to the furnace (Melter). The range of the O2 is from 20% to 35%, now I need to develop an alarm that will activate when one analyzer drifts + or - 5% from the other analyzer.
The alarm is intended to alert the operator that one or the other analyzer may need servicing. Both analyzers will be online at the same time and will be reading the same oxygen stream. I am programming with Siemens Simatic S7 and programming a Siemens CPU 414-3.
The Problem: I have a Vitrification furnace that burns oxygen enriched fuel at 2900 F. I have 2ea. Inlet oxygen analyzers that monitor how much O2 is being added to the furnace (Melter). The range of the O2 is from 20% to 35%, now I need to develop an alarm that will activate when one analyzer drifts + or - 5% from the other analyzer.
The alarm is intended to alert the operator that one or the other analyzer may need servicing. Both analyzers will be online at the same time and will be reading the same oxygen stream. I am programming with Siemens Simatic S7 and programming a Siemens CPU 414-3.