Measured Parameters

ParameterNameVariationTypeChannelVoltageComments
Carbon dioxideCO20-3000ppmMean
Std Dev
DAQ 01-4.984-20mA
with 249Ohm resistor
Globe temperatureGT0-70oCLastDAQ 50-0.710mV/oC
Air temperatureAT-30 - +70oCLastDAQ 20-5-
Relative humidityRH0-100%LastDAQ 30-5-
IlluminanceLUX0-2500luxMean
Std Dev
DAQ 40-5-
Air velocityAV0-5m/sMean
Std Dev
DAQ 10-5-
Radiant TemperatureRT-LastFormula-Note 1
Leq ALEQA30-90dBAMean
Std Dev
L90
L10
<30
>90
Serial-Note 2
Leq LinLEQLIN30-90dBLinMean
Std Dev
L90
L10
<30
>90
Serial-Note 2

Notes
  1. RT is derived from measured GT and AT. The Formula is:-
    RT = GT (1+ 2.35 AV1/2) - 2.35 AT AV1/2
    (Taken from: Chadderton, D. V.: Building Services Engineering, E & FN Spon, First Edition, 1991)
  2. LEQ values are obtained directly from Sound Level Meter (SLM), connected to the serial interface of the computer. Mean and standard deviation are calculated in LabView.