Casella CEL CEL-281 - Manual (Page 104)

If overloading has occurred, the display will indicate the per-
centage of the elapsed time spent overloaded.
6. Press the key to obtain underrange information.
If underrange operation has occurred, the display will indicate
the percentage of the elapsed time spent underrange.
7. Press the + keys simultaneously to obtain informa-
tion about when and whether the 200 Pa level has been ex-
ceeded.
If data is being logged, logging will continue uninterrupted but
the display will change, and depending upon which of time or
date was inspected the last time this area was used, it will
show the time or date at which the 200 Pa level was exceeded.
If this level has not been exceeded during the measurement
run, the display will show _ _:_ _:_ _
8. Press the key to see the most recent time or date at which
the 200 Pa level was exceeded.
ON
TIME
910037
Figure 17: Typical display showing time information
Obtaining Required Results
CEL-281 Operator's Handbook - Page 95