Asked by annie

1)Let the instrument switch on for 1 hour before analysis.
2)On the instrument for 1 hour before analysis.
3)Switch on the instrument and leave it on for 1 hour before analysis.
4)Switch on the instrument and conduct the analysis after 1 hour.
5)Turn on the instrument and allow a 1 hour warm-up period before analysis.

Which sentence(s) is/are acceptable?

Answers

Answered by Ms. Sue
3, 4, and 5 are acceptable.
Answered by Albert
Yes,; but, I don't much like "conducting" an analysis.
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