Casella CEL Airborne particulate monitoring system - Manual (Page 22)

HB3256-03 Page 20
The window defines which parameters will be recorded and how often.
Logging selections can be turned ON and OFF as appropriate (there is little point recording wind
speed if no wind speed sensor is present on a system!).
A variety of particulate data values may be saved;-
Total Volume. System will record the total volume sampled in metres
3
. The value is
automatically zeroed when ever the APM logger is reprogrammed or may be
manually reset at any time by pressing 'Function Clear' on the logger:-
'Function clear' is accessed by pressing and together.
Total Particulate. This represents the accumulated average of all dust density readings which
have occurred since the logger was re-programmed or manually cleared
using the 'Function Clear' key press sequence.
24hr This is a rolling 24 hour average value. The value is updated once per hour.
1hr This represents the average of all one second readings occurring within the
previous hour. The value is updated once per hour.