Honeywell IAQPoint2 Guide De Démarrage Rapide page 1463

Point 12 CO RUN TIME
This point shows the running time (in days) of the sensor. The
point is reset to default value (0) when a 'Factory Reset' is
ordered.
Point 20 OVRD TIME
Used to count the time the device is in 'override' mode.
Point 22 CMD SET SPAN
This point is used for the span calibration. When this point is
ordered (value is 'START'), the device will calibrate its reading
with the gas specified in the GAS SPAN point and the
concentration read by the detector. When done, the point
returns to STOP by itself.
Note: This command will affect the detector's calibration.
Point 23 CMD SET ZERO
This point is used for the zero calibration. When done, the point
returns to STOP by itself. Note: Setting this point to STOP,
from the START position, will cancel the calibration.
Note: This command will affect the detector's calibration.
Point 29 DAY.NIGHT
This point tells the detector to run in day or night mode. These
modes are not supported by the detector.
Point 90 - 91ALR LO FLAG and ALR HI FLAG
This points shows the status of the corresponding alarm level.
Point 92 SNS WARMUP
This point shows if the sensor is in warmup mode and returns
to "ready" when the sensor has finished the warmup. Avoid
calibration during warmup.
Note: Not all sensors require a warmup period.
901T User Manual
Use and Calibration
Points Definitions
31