Casella USA CEL 240 Series Panduan Operator - Halaman 8

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Halaman Cetak

Effects of Humidity:

Storage Environmental Conditions

Humidity:

Temperature range:

Pressure:

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 USB 5 pin mini B)

Batteries:

3x AA, Rechargeable NiMH or Alkaline cells

Battery Life:

Typically 35 hours

Power consumption: ~65mA

Electromagnetic Compatibility

Instrumentation is designed and tested to comply with the following EMC and ESD

Standards:-

IEC 61000-4-2

Testing and Measuring Techniques - Electrostatic discharge

immunity tests.

IEC 61000-4-3

Electromagnetic compatibility (EMC) - Radiated electromagnetic

field tests.

IEC 61000-4-6

Electromagnetic compatibility (EMC) - Immunity to conducted

disturbances induced by radio frequency fields. Tested at 10V/m or

greater.

Effects of AC Power Frequency Fields

Less than ±0.5dB change in 74dB(A) 925Hz reference level when subjected to 160A/m

AC magnetic field at 50 and 60Hz.

Display

128x128 Mono Graphics LCD, 0.5 seconds update rate.

Connectivity

USB: USB 2.0 via 'mini B' socket. For SPL output (software required) weighted as per

selected frequency and time weightings.

AUX Socket (2.5mm stereo):

Less than ±0.5dB over the range 30 to 90% relative

humidity (non-condensing), relative to the value at

reference conditions.

0 to 90%RH in the absence of condensation.

-20 to +60

65 to 108kPa