Figure 32 - Temperature Sensor - Smart Calibration; Figure 33 - Pressure Sensor - Smart Calibration - Ametek OXYvisor Installation, Operation & Maintenance Manual

Calibration
T = Temperature customer knows to be correct
actual
T = Temperature from RTD
measured
T = Corrected temperature (T
last
If T - T < 15°C then the difference between the two temperatures is applied across the entire
actual measured
temperature measurement range of -15 to 100°C (5 to 212°F). Additionally, T
reference point for the temperature calibration.
If T - T ≥ 15C then the calibration line should be redrawn (see in green above). The slope of this line
actual last
can be determined by the two temperature values. Graphically it is shown to the below.

Figure 32 - Temperature Sensor - Smart Calibration

5.12.7 - Calibration - Pressure Sensor Calibration
Ambient Pressure Sensor Calibration
It is normally not necessary to calibrate the ambient pressure sensor. However, if there is an offset the ambient
pressure sensor can be calibrated via a Smart Calibration routine. The routine allows for either a 1-point offset
adjustment or a 2-point offset and slope adjustment.
The analyzer always performs an offset unless a successive calibration is performed with a <250 mBar
differential from the first and then is automatically adjust the slope. Details of the calibration logic are shown:
P = Pressure customer knows to be correct
actual
P = Pressure from Atmospheric Pressure Sensor on circuit board
measured
P = Corrected pressure (P
last
If P - P < 250 mBar then the difference between the two pressures is applied across the entire
actual measured
pressure measurement range of 500 to 2000 mbar. Additionally, P
point for the Pressure calibration.
If P - P ≥ 250 mbar then the calibration line should be redrawn (see in green above). The slope of this
actual last
line can be determined by the two pressure values. Graphically it is shown above.

Figure 33 - Pressure Sensor - Smart Calibration

58
Installation, Operation and Maintenance Manual
) from last calibration. Default is 25°C for first time calibration.
actual
) from last calibration. Default is 1013 mbar for first time calibration.
actual
OXYvisor Optical Oxygen Analyzer
last
should be stored as the last reference
last
should be stored as the last