Casella CEL CEL-414 - Manual (Page 50)

Digital display:
3 1 / 2 digit, 7 segment with 0.1 dB
resolution.
Analog display:
26 segment bar, with 1 dB resolution.
Functions indicated:
SPL Sound Pressure Level,
L eq Equivalent Continuous
Level (not CEL-414/3),
L Tm3 Maximum Value
averaged over 3 sec
periods, (A, B &
CEL-493/3),
L Tm5 Maximum Value
averaged over 5 sec
periods, (A, B &
CEL-493/3),
L OSHA Average A-weighted
slow level with a
preset threshold and q
= 5 (C & D versions
but not CEL-414/3),
L DOD Average A-weighted
slow level with a
preset threshold and q
= 4 (C & D versions
but not CEL-414/3),
L max Maximum Level,
DUR Duration over which
measurements taken,
SEL Sound Exposure Level
(not CEL-266/3,
CEL-328/3 or
CEL-414/3)
1SM One Second Maximum
when special link is
connected according
to Section 10.2 (not
CEL-266/3 or
CEL-328/3),
31-16k Octave band centred
on the indicated
frequency (only
CEL-266/3 and
CEL-328/3)
BAT Battery voltage.
Parameters displayed:
dB,
Battery voltage,
Hours & minutes,
Low battery level,
Overload,
Frequency weighting in use,
Filter in use,
PAUSE button operated,
Error messages.
Impulse capability:
63 dB peak to RMS, 1 ms of 4 kHz.
Start up stabiliaztion time:
90 seconds.
Overload detection:
Pre- and post-weighting detectors,
with memory.
Analog outputs (via auxiliary
socket):
AC (CEL-493/3 only):
Conditioned signal,
typically 8.0 V RMS for
FSD.
Recommended imped-
ance of any connected
device (including
interconnecting cable)
>10 kΩ and <50 pF.
Consult CEL about
cables for use with
equipment not
manufactured by CEL.
Page 46 - General CEL Sound Level Meters Handbook