How it works – Casella CEL CEL-281 User Manual

Page 55

mulative percent, while a second press selects dB. Similarly,

pressing

once selects the lower (PROB%) command and

displays probability percent, while a second press selects dB.

Within the distribution area, pressing the

keys

select respectively, the next higher or lower distribution percent-
age value or dB level cell in the histogram. When held down,
these keys have an automatic repeat function that scans
through the cells at one every half second so that particular val-
ues can be located quickly.

Pressing the

key again selects the same cell area of the

next histogram in the stored series. Stored distribution histo-

SPL - Fast

SPL - Slow

dB Cells

Cumulative%

Probability%

Second Selects Other

Cumulative% Histogram

First Press Selects

940023

Histogram

Selects Next

CUM%

DISTR

PROB%

First Press Selects

Probability% Histogram

Parameter (% or dB)

Second Selects Other

Parameter (% or dB)

Selects Next Cell

In Same Histogram

10 sec L

(10 sec L

Q=3)

AVG

SPL - Impulse

1 sec L

(1 sec L

Q=3)

AVG

1 min L

(1 min L

Q=3)

AVG

Figure 9: Distribution histograms for cumulative percent and probability

percent

CEL-281 Operator's Handbook - Page 47

How It Works