Casella CEL CEL-281 - Manual (Page 57)

10 s slow max: Maximum SPL taken over a 10 second
sampling period with slow response,
10 s imp. max: Maximum SPL taken over a 10 second
sampling period with impulse response,
1 s fast max: Maximum SPL taken over a 1 second
sampling period with fast response, with
results stored for only the most recent hour,
940024
1 min L (1 min L Q=3) eq
1 min fast max
1 min slow max
10 s fast max
10 s slow max
1 s slow max
Time Cells
NOW
Selects dB Selects Time
or
Selects Next Cell
Level dB
AVG
1 s fast max
1 min L Q=6
AVG
1 min L Q=5
AVG
1 min L Q=4
AVG
Exchange
Rate (Q)
Selects
Next
Q value
Most recent hour only
1 s imp. max
10 s imp. max
1 min imp. max
TIME
PROFILE
LEVEL
Selects
Next
Profile
Figure 10: Relationship between the stored time history profiles
CEL-281 Operator's Handbook - Page 49
How It Works