Casella CEL CEL-368 - Manual (Page 62)

Time Weighting
Fast or Slow,
Q (Exchange Rate)
4, 5, 6,
or " - " when no average is being calculated,
(Q=3 will never appear on the display, but will
always be in use for L
eq ),
Frequency Weighting
A, C, or L (Linear),
PER (Sampling Period)
i.e. the interval at which samples are taken
1 min,
5 min,
10 min,
15 min,
30 min,
60 min,
L N 4 measurements set at any value* in 1% steps
between L
01 and L 99,
PROF Allows profile mode to be switched ON or OFF,
EVENT Allows event mode to be switched ON or OFF,
TIMER Allows logging run and stop times to be set ON
or OFF.
Note*: Period L N values become available only when period length 5 min.Similarly
Cumulative L N values become available only when run length 5 min.
Cumulative Measurement
Cumulative mode measurement for a whole run ALWAYS operations im-
mediately is pressed to start logging, (or as soon as the timer
reaches an active start time after is pressed).
1. Use the control keys and the SETUP menu to select a suitable
measurement range, period, time weighting, frequency weight-
ing, four L
N values and also a value for Q if L Avg is also required
for the proposed measurement task.
RUN
PAUSE
RUN
PAUSE
CEL-268/368 Handbook Page - 61