Casella CEL CEL-281 - Manual (Page 81)

2. If the instrument is switched OFF, switch the power ON as
described in Section 4.1.
The ON legend will appear on the display.
3. If the CEL-6012 Keypad is not in place, install it as detailed in
Section 4.2.
4. If the instrument is in calibration delay mode or calibration
mode, if necessary perform a a field accuracy check (acoustic
calibration) according to Section 4.5, then go to step 9
At the end of the calibration procedure, the instrument will
become fully operational in L
Av measurement mode with the
LAVG legend displayed.
5. If the instrument is fully operational but the display has been
switched OFF, press the key to switch the display ON,
then go to step 9.
6. If the instrument has already been switched ON, the display
is ON, but no data is currently being logged (RUN legend not
shown), or the instrument has been stopped, go to step 9.
7. If the instrument is fully operational while the RUN legend is
displayed continuously to indicate that data is being logged, go
to step 8, but note the following Caution.
Caution
When the instrument is restarted with the
key after data logging has been stopped, the
memory contents are cleared and all
previously stored data lost. To preserve the
data, download to a PC before restarting.
Page 72 - CEL-281 Operator's Handbook
Preparation_