Casella CEL CEL-281 - Manual (Page 66)

Under range count,
Elapsed time in seconds.
Similarly, the following noise information is stored while the instrument
is switched OFF.
Histograms (based on up to 14 hours of sample measurements):
1 min. L eq 1 dB resolution,
10 s L eq 1 dB resolution,
1 s L eq 1 dB resolution,
Fast SPL 1 dB resolution,
Slow SPL 1 dB resolution,
Impulse SPL 1 dB resolution.
Profiles:
1 min. L eq Up to 14 hours with 0.1 dB resolution,
10 s Fast Max Up to 14 hours with 1 dB resolution,
10 s Slow Max Up to 14 hours with 1 dB resolution,
10 s Impulse MaxUp to 14 hours with 1 dB resolution,
1 s Fast Max
Most recent 1 hour with 1 dB resolution,
1 s Slow Max Most recent 1 hour with 1 dB resolution,
1 s Impulse Max Most recent 1 hour with 1 dB resolution,
1 min. L
AVG Up to 14 hours with Q=4, 0.1 dB resolution,
1 min. L AVG Up to 14 hours with Q=5, 0.1 dB resolution,
1 min. L AVG Up to 14 hours with Q=6, 0.1 dB resolution.
Noise Dose (based on up to 14 hours of sample measurements):
Dose With Q=3 and 0.1 dB resolution,
Dose With Q=4 and 0.1 dB resolution,
Dose With Q=5 and 0.1 dB resolution,
Dose With Q=6 and 0.1 dB resolution,
3.5 Interface
How It Works
Page 58 - CEL-281 Operator's Handbook