Casella CEL CEL-281 - Manual (Page 112)

The main display is now indicating A-weighted Slow SPL.
13. Press the key a sixth time.
The main display is now indicating A-weighted Fast Max, and if
the instrument contains stored data, (or is logging data) a level
will be shown.
14. Press the key a seventh time.
The main display is now indicating A-weighted Fast SPL again.
The key may be used to move through the sequence of parameters
in the opposite direction.
5.6.2 Measuring Pa
2
h
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.
5. If Pa
2
h is not shown to the right of the main display, press the
key again so that it is shown.
The main display is now indicating sound exposure level in Pa
2
h.
Obtaining Required Results
CEL-281 Operator's Handbook - Page 103