Measured Parameters

Parameter Name Variation Type Channel Voltage Comments
Air temperature AT 0-70°C Min
Max
Mean
DAQ 0 0-0.7 10mV/°C
Note 2
Carbon dioxide CO2 0-3000ppm Min
Max
Mean
DAQ 1 1-4.98 4-20mA
with 249Ω resistor
Note 2
Illuminance LUX 0-2500lux Percentage
<=10
<=100
<=1000
DAQ 2 0-5 500lux/V
Note 3
Leq A LEQA 30-90dBA Mean
Std Dev
L90
L10
<30
>90
Overload
Serial - Note 1
Leq Lin LEQLIN 30-90dBLin Mean
Std Dev
L90
L10
<30
>90
Overload
Serial - Note 1

Notes

  1. LEQ values are obtained directly from Sound Level Meter (SLM). The serial port is adressed at 1 second intervals and 30 minutes values calculated by LabView.
  2. Air temperature and Carbon dioxide are sampled at 10 second intervals and given as 5 minute values.
  3. Lightmeter sampled at 10 second intervals and given as 30 minute values.

All values are written to file at 30 minute intervals.