Casella CEL CEL24X - Manual (Page 17)

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EQUIPMENT SPECIFICATION
SPECIFICATION CHARACTERISTICS
STANDARDS
IEC 61672-1 2002-5 (Electro-Acoustics – Sound Level
Meters) Group ‘X’ instruments, Performance Class 2.
IEC
60651: 1979 Type 2 .ANSI S1.4 type 2A Specification for
Sound Level Meters.
CEL-244/246 Models: IEC 60804: 2000 Type 2, ANSI
S1.43: 1997 (R2007) Type 2
RANGE:
Display range: 30 -130dB(A) RMS, available in 2 ranges,
30 -100dB and 60 -130dB. Linear operating range 10dB
above noise floor.
RMS FREQUENCY
WEIGHTINGS A and C filter weightings, satisfying IEC 61672-1: 2002
Class 2, ANSI S1.4 Type 2A.
NOISE F LOOR Total noise floor typically <33dB(A).
FREQUENCY RESPONSE Overall frequency response as per IEC 61672-1: 2002
Class 2, ANSI S1.4 Type 2A.
TIME WEIGHTINGS
Fast, Slow and Impulsive according to IEC 61672-1:
2002, ANSI S1.4 Type 2A.
REFERENCE CONDITIONS
20oC air temperature, 65% relative humidity, 101.325kPa
atmospheric pressure. Nominal reference level = 114.0dB
at 1kHz. Free field perpendicular incidence.
OPERATING ENVIRONMENTAL CONDITIONS
Humidity 5 to 90% RH in the absence of condensation.
Temperature Range 0 – 40 o C.
Pressure 65 to 108kPa.
Effects of Humidity Less than ±0.5dB over the range 30 to 90% relative
humidity (non-condensing), relative to the value at
reference conditions.
STORAGE ENVIRONMENTAL CONDITIONS
Humidity 0 to 90% RH in the absence of condensation.
Temperature Range
-20 to +60oC.
Pressure 65 to 108kPa.
MICROPHONE
Internal electret capsule 10mV/Pa nom +/-3dB within ½”
preamplifier.
CALIBRATION Auto calibration by application of 1kHz @ 114 or 94dB
calibrator (CEL-110/2 or CEL-110/1). ±1dB calibration
range.
POWER SUPPLY
External DC 5VDC (via US B 5 pin mini B).
Batteries 3x AA, Rechargeable NiMH or Alkaline cells.
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