Part III | Model 6600 | |
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optics of the photometer design, the analyzer will measure the
NOTE: | Should the fine filter system be |
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Because the
3.4.3The Automatic Sample Cell Cleaning System
The backflushing of the process fluid can be designed in and to occur for various reasons depending upon the application. For example,
Ultra clean process applications for leaks into the like:
1steam condensates
2process cooling water
3boiler return condensates
In these applications, backflushing is used not to keep the cell windows clean but to flush out the process fluid and supply a reproducible zero back- ground fluid (in this case a gas such as oil free air or Nitrogen). When the process is ultra clean, a clean oil free gas background serves as an excellent meduim to autozero the instrument on a hourly basis while correcting for the optics, source and detector anomolies that occur over time. The backflush supply required (preferred