Casella CEL CEL-281 - Manual (Page 116)

6. Press the or keys to step forwards or backwards
through the series of cells to reach the cell corresponding to the
specified level.
7. Press the key to see the cumulative percentage time spent
at or above this level.
8. Press the key to see the level again.
9. Press the key again to see the probability percentage time
spent at this level.
10. If necessary, press the or keys again at any time to
step forwards or backwards through the cells to reach another
specified level.
5.6.5 Retrieving Peak Exceedance Times
1. Switch the CEL-281 ON.
2. Slide the CEL-6012 Keypad on to the dosimeter.
3. Wait about 30 seconds until TC= , , or is shown below
the main display.
4. Press the key once.
The main display indicates the current time.
5. Press the key again to check the current date.
Obtaining Required Results
CEL-281 Operator's Handbook - Page 107