Figure 14 – Span Calibration Gas Initial Purge
9. Redirect gas flow through the tee fitting and close the calibration port at the top of the
sensor (see illustration below). Wait for the gas reading to stabilize for a minimum of 5
minutes and until the gas reading on the web page has stabilized.
Figure 15 – Span Calibration Gas Flow Stabilization
10. Enter the target gas concentration in the “Enter gas concentration (%)” field.
11. Press the “Calibrate” button. A Calibration Timer will count down.
12. Once the Calibration Timer has counted down, the span value will be calibrated.
A20830
To ensure accurate readings, the gas sensor must be calibrated at both the low end and high
end of the measured gas composition range. Performing only a zero or span calibration will
cause the sensor to give an erroneous reading. The gas flow through the sensor must be
carefully controlled in order to maximize the accuracy of the sensor. The flow of gas during
To Next Page
Loading...