8. Then rotate the Sample/Bypass valve to "OFF". Close the gas and
disconnect it.
9. Finish calibration.
Attention: It is rather common to find that when you introduce
calibration gas into the analyzer, the reading is quite different from
what you expect.This is normally caused by errors in gas handling,
rather than by calibration errors. If the gas doesn't read close to what
you expected, please look at the troubleshooting section of the manual
rather than simply adjusting the calibration to what may be a
completely incorrect value.