ThermoFisher Scientific 146iQ, Instruction Manual

Page: 46 / 302

Operation
Calibration
3-16 146iQ Instruction Manual Thermo Scientific
The Calibrate Span Coefficient screen is used to enter the span
concentration and calibrate the O
3
coefficient. The O
3
span coefficient is
calculated, stored, and used to correct the current reading.
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>Photometer Calibration>Calibrate Span
Coefficient
The Calibrate Span Coefficient screen contains the following information:
●
Edit Span Concentration: User enters the span concentration.
●
Current Concentration: Read only. Displays current concentration.
●
Current Span Coefficient: Read only. Displays the current span
coefficient.
●
Calculated Span Coefficient: Read only. After the “Edit Span
Concentration” value is entered, the new calculated span coefficient is
displayed.
●
Calibrate: When pressed, updates the coefficient and the current O
3
concentration should match the span concentration.
Calibrate Span
Coefficient