Thermo Scientific 450iQ Instruction Manual page 53

Operation
Calibration
Adjust SO , H S, and CS The Adjust SO , H S, and CS Span Coefficient screens are used to
2 2 2 2
Span Coefficients manually adjust the coefficient and enter the span concentration. The SO
2
span coefficient is calculated, stored, and used to correct the current
reading. All calibration screens function the same way. Therefore, the
following example of the SO2 screen applies to the H S and CS calibration
2
screens as well.
The following screen is shown in single range mode and dual or auto range
mode. In dual or auto range modes, "High Range" or "Low Range" is
displayed to indicate the calibration of the high or low coefficient. The
Adjust High Range SO Span Coefficient and Adjust Low Range SO Span
2 2
Coefficient screens function the same way.
It is important to note the averaging time when calibrating. The longer the
averaging time the more precise the calibration results. To achieve
maximum precision, allow the instrument to stabilize each time input gas is
changed and set the averaging time to 300-second averaging.
Home Screen>Calibration>Advanced Calibration>Manual
Calibration>Adjust Span Coefficients>Adjust SO Span Coefficient
2
(single range mode)
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Thermo Scientific 450iQ Instruction Manual