Casella CEL CEL-414 User Manual
Page 6
in the CEL-438, CEL-338 and CEL-238A
series, or to some other digital device for
data logging or processing, and for con-
trol purposes.
With the exception of the CEL-414/3C
which has no integration functions, these
instruments have the following features:
A
Standard European version of the
instrument measuring SPL, L
eq
,
L
Tm3
, L
Tm5
L
max
, SEL, (and 1SM),
with A-weighted and Linear
frequency response,
B
Standard European version (as A)
that contains a CEL low power serial
interface,
C
Standard American version of the
instrument measuring SPL, L
eq
,
L
OSHA
, L
DOD
, L
max
SEL, (and 1SM),
with A- and C-weighted frequency
response,
D
Standard American version (as C)
that contains a CEL low power serial
interface,
E
(CEL-328/3 only) Non-integrating
version based on the CEL-328/3C,
without L
OSHA
, L
DOD
, or broadband
L
eq
.
All instruments and versions have a simi-
lar appearance, with minor differences
only in the legends on the frequency
weighting switch and on the bezel sur-
rounding the main display. The best way
to identify an instrument version is to re-
fer to the suffix letter in the instrument
serial number on the rear cover, or to
note the version letter (A, C or E in upper
case, b or d in lower case) displayed to-
gether with the type number during the
instruments start up sequence.
All versions will accept the CEL-3025 Vi-
bration Attachment connected via the
Table 1: Functions available with various time weighting selections
Version
Time Weighting
A, B & C & D
E
414/3
Fast Slow ImpulsePeak
493/3
Sound Pressure Level (SPL)
X
X
X
X
X
X
X
Broad band Energy
Equivalent Level (L
eq
)
X
X
X
X
1
X
2
Octave band Energy
Equivalent Level (L
eq
)
X
X
X
X
X
1
Maximum Value (L
max
)
X
X
X
X
X
X
X
X
Measurement Duration (DUR)
X
X
X
X
X
X
X
X
Sound Exposure Level (SEL
3
)
X
X
X
X
Taktmaximalpegel 3s (L
Tm3
)
X
X
X
Taktmaximalpegel 5s (L
Tm5
)
X
X
X
L
OSHA
X
X
L
DOD
X
X
1SM
4
X
X
X
X
X
Note
1
: Slow L
eq
does not fully satisfy the requirements of IEC 804.
Note
2
: Impulse time weighted L
eq
is used only when complying with VDI 2058.
Note
3
: Not available with Types CEL-266/3, CEL-328/3 and CEL-414/3.
Note
4
: 1SM is a special application required by IEC 651 para 7.8 which calls for a one
second maximum profile to be adopted for the SPL function. Measurements in this mode
can be made when the link is connected according to Section 6.3.
Page 2 - General CEL Sound Level Meters Handbook