Dräger HFG 000 Series Technical Manual page 12

Conventions in this document
Abbreviation
STEV
TWA
12
Explanation
Short time exposure value, average value of exposure over a
short period of time (generally 15 minutes).
Time weighted average, average shift values are generally lim-
ited to eight hours exposure per day per workplace for 5 days a
week during a work lifetime. Observe the national definition of
the occupational exposure limit.
Technical manual
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