Casella CEL CEL-281 - Manual (Page 117)

6. Hold down the key and press the key once.
Depending on whether time or date was inspected last, the
main display indicates the first time or date at which the 200 Pa
level was exceeded. If this level has not been exceeded,
_ _ : _ _ : _ _ will be displayed.
7. Either: If time is indicated, press once to see the date.
Or: If date is indicated, press once to see the time.
8. Press the key once.
Depending on whether time or date was inspected last, the
main display indicates the most recent time or date at which
the 200 Pa level was exceeded.
10. Either: If time is indicated, press once to see the date.
Or: If date is indicated, press once to see the time.
Page 108 - CEL-281 Operator's Handbook
Obtaining Required Results_