PROGRAMMING THE AREARAE
4-9
4.4.2 Sensor Calibration Time
Refer to the RAE website, www.raesystems.com, and
download Technical Note TN-114, Sensor Specifications And
Cross Sensitivities, for current data and information regarding
sensor calibration time.
Slowly responding sensors listed in TN-114 may require pre-
exposure to the gas immediately before initiating the calibration
sequence. Some firmware versions use a fixed 60-second
calibration time; some newer versions automatically apply the
full calibration time. After completing the zero calibration
procedure, expose the unit to the gas for the pre-exposure time
if a 60-second countdown time is programmed in the unit.
If the firmware has the full calibration time programmed in, the
sensors must be calibrated in the Single Sensor mode to take
advantage of this feature. The calibration time is set at 60
seconds in the Multiple Sensor mode and may not be changed.