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Multiple Streams
- One Trace Analyzer can process up to four sample stream sources
- Normally one gas stream is read for at lease one Tape Advance Time. The time is set when the analyzer is manufactured.
- When the tape has been read for the Tape Advance Time, valves turn off the previous stream and turn on the stream source for the next active stream
- The screen is loaded with the readings for the next stream
- A delay of about 3 minutes is executed to allow the new stream to fill the detector before new readings are taken
- This cycle continues with each tape advance
- The tape advance after the RESET function does not change the stream being processed
- When multiple streams are in use, a number in the upper right part of the Status Screen indicates the stream number being displayed
- The reading from any stream can be viewed from the Status Screen by using the Left and Right arrow keys
- When a stream is being viewed that is not presently being read, a small arrow appears beside the stream number
- When multiple streams are in use, the maximum supply pressure to the analyzer is 50 psi
- The individual stream pressures should be carefully balanced so that each stream generates the same flow
- The STREAM SETTINGS menu can be used at any time to change the stream that is being analyzed.
- If a stream does not require analysis, it can be set to disabled. At tape advance, streams that are disabled are not analyzed.
- If all streams are disabled, the stream presently being analyzed continues after tape advance.
- Stream Range Guidelines:
- If the range of any stream is <= 1.0 ppmV then the range of all streams must be <= 1.0 ppmV
- If the range of any stream is > 1.0 ppmV and <= 50 ppmV then the range of all streams should be 1.0 < range <= 50
- If the range of any stream is > 50 ppmV and <= 500 ppmV then the range of all streams should be 50 < range <= 500
