CASELLA CEL CEL-246 - Equipment Specification

12. EQUIPMENT SPECIFICATION
SPECIFICATION CHARACTERISTICS
STANDARDS
IEC 61672-1 2002-5 (Electro-Acoustics – Sound Level
Meters) Gro up ‘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
Clas s 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
20
o
C air temperature, 65% relative humidity, 101.325kPa
atmospheric pressure. Nominal reference level = 114.0dB
at 1k Hz. 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 th e value at
reference
conditions.
STORAGE ENVIRONMENTAL CONDITIONS
Humidity
0 to 90% RH in the absence of condensation.
Temperature Range
-20 to +60
o
C.
Pressure 65 to 108kPa.
MICROPHONE
Internal electret capsule 10mV/Pa nom +/-3dB within ½”
preamplifier.
CALIBRATION
Auto calibration by app lication 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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