CASELLA CEL CEL-450 Handbook page 31

Operation Press Display Shows
11. Select
Period and
Profile
Functions
from the
Period
Setup
screen
12. If required,
enable (√)
or disable to
enable
(X) the
functions quick
edit
mode
13. Select
or
Dose
Results
from the
then
Setup
screen to
enable
dose
measure-
ment
Select Mode & Setup
Comments
The Period and Profile
functions are set in the
same way as the cumulative
functions (√ =enabled, X
=disabled) and use the
weightings set in step 6
above.
Period and profile
measurement have the
following restrictions:
Histogram and H
ML
functions are not available,
L
AF LTm5
L
AFmx
L L
AFmn AF10.0
L
LAeq AF50.0
L L
Zpk AF90.0
L L
A E AF95.0
L L
EP,8h AF99.0
L
Tm3
A maximum of 4 profiles can
be attached,
The period or profile time
must be 1 minute before
LN% values are available.
Use and to select a
field.
Use and to change
the entry in the field.
Save the settings by
pressing again to
resume normal operation.
Press to return to the
Setup screen.
This screen allows the dose
threshold and normalisation
period to be set. Only levels
above the threshold level
will be included in the dose
measurement.
The threshold can be set to
0, or in 1 dB steps between
70 and 90 dB.
U.K legislation requires that
the threshold be set to 0.
CEL-450/490 Operators Handbook - Page 31