Casella CEL CEL-62X - Manual (Page 23)

6. SPECIFICATIONS
GENERAL
The CEL-62X provides SPL, Integrating and Octave band noise measurement
compliant with the following international standards:-
IEC 61672-1 2002-5 (Electro-Acoustics – Sound Level Meters) Group ‘X’
instruments. Performance of Class 1 or 2 as relevant to instrument model.
IEC 60651: 1979, IEC 60804: 2000, ANSI S1.4: 1983, ANSI S1
1/1 Octave and 1/3 Octave Filters comply with EN61260: 1996, Class 0 and ANSI
S1.11 1986, Order-3 Type 0C.
MEASUREMENT RANGE
Single measurement range up to 140.2dB(A) RMS and 143.3dB (C) Peak. Linearity
range from 10dB above noise floor.
RMS FREQUENCY WEIGHTINGS
A, C and Z filter weightings, satisfying IEC 61672-1: 2002 Class 1.
OCTAVE MEASUREMENT
Real-time 11 bands with centre frequencies from 16Hz to 16KHz. Displayed
Spectrum may be pre-weighted with A, C or Z.
Z weighted octaves only are stored to be post weighted in dB36 software.
PEAK MEASUREMENT
A, C and Z weighted from 65.0 to 143.3dB
RMS DETECTOR
Digitally derived True root-mean-square detection (RMS), 0.1dB display resolution.
NOISE FLOOR
Total inherent Noise including microphone thermal noise @20°C - <22dB(A) Class
1, <30dB(A) Class 2.
Electrical Noise floor <20dB(A).
FREQUENCY RESPONSE
6Hz to 20kHz (upper and lower 3dB frequencies). Digital Sampling rate 67.2KHz
Overall Class 1 and 2 frequency response compliant with IEC 61672-1: (2002)
TIME WEIGHTINGS
Fast, Slow and Impulsive according to IEC 61672-1: (2002).
CORRECTION FILTERS
Built in correction filter for random incidence sound pressure fields.
REFERENCE DIRECTION
For free field measurements the reference direction is perpendicular to the
microphone diaphragm.
REFERENCE CONDITIONS
23 o C air temperature, 50% Relative Humidity,
101.325kPa atmospheric pressure.
Nominal reference level = 114.0dB at 1kHz
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