Besides the software command that does the trick, you should be aware of
special concerns with night runs.
Make sure everything is in top condition , like sample tubing. If it is worn
out for example, it can leak during the night when no one is around, and you
come next day with a long list of useless data.
Also, make sure to provide enough wash solution for the whole run.
Basically, take an inventory of everything that is consumed during a day run
and see if it is automatically provided at night.
Also, take into account that a working day is 8 hours long, but a "working
night " ( 5pm - 8 am ) is 15 hours long.
Hasan H. Al-Muhanna
Center for Environment & Water
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