Casella CEL-350 dBadge - Microphone Specification (CEL-252)

Casella CEL-35X dBadge Users Handbook – Page 30
Overload Indication: 140.4dB RMS (i.e. 0.1dB above the top of
the range),
Peak Overload Value: 143.4dB Peak Linear (i.e. 3.1dB above the
top of the range),
Stabilisation Time: 3 seconds after power up,
Operating Environment
Temperature: 0
o
C to +40
o
C,
Pressure: 65 - 108kPa,
Humidity ± 0.5dB: 30% - 90% (non-condensing),
Magnetic Fields: Negligible,
Storage Environment
Temperature: -10
o
C to +50
o
C,
Battery: Internal NiMH, 32 hour battery life,
Charge Time: Less than 90 minutes from discharged,
Dimensions mm (in): 72x47x52 (2.8x1.8x2.0),
Weight g (oz): 68 (2.4),
The CEL-35X/IS Intrinsically Safe dBadge is labelled
with the following:
ATEX:
I M1
II 1G
EEx ia IIC T4
EEx ia I
(T
a
= -20
o
C to +40
o
C)
7.2 Microphone Specification (CEL-252)
Classification: Type 2
Nominal Open-Circuit Sensitivity (250Hz): -28dB ± 3.0dB
(30mV/Pa)
Polarization voltage: 0V
Capacitance (polarized, 250Hz): 11-15pF
Operating temperature range: 0 to +40
o
C
Cartridge thermal noise: 25dB(A)
Dimensions: IEC 61094-4 Type
WS 2
FM/CSA:
Class 1
Division 1
Groups A, B C, D,
Temperature classification T4