Thermo 48i - Calibrate CO Coefficient

Operation
Calibration Menu
3-24 Model 48i Instruction Manual Thermo Electron Corporation
It is important to note the averaging time when calibrating. The longer the
averaging time, the more accurate the calibration will be. To be most
accurate, use the 300-second averaging time. For more information about
calibration, see Chapter 4, “Calibration”.
• In the Main Menu, choose Calibration > Cal CO Background.
•Press to set the new reading to zero.
• Press to return to the Calibration menu or to return to
the Run screen.
Calibrate CO Coefficient The Calibrate CO Coefficient screen is used to adjust the CO coefficient
and enter the span concentration. The display shows the current CO
concentration reading and the current CO range. The next line of the
display is where the CO calibration gas concentration is entered.
The CO span coefficient is calculated, stored, and used to correct the
current CO reading. For more information about calibration, see Chapter
4, “Calibration”. In dual or auto range modes, “High” or “Low” is displayed
to indicate the calibration of the high or low coefficient.
• In the Main Menu, choose Calibration > Cal CO
Coefficient.
• Use and pushbuttons to move the cursor left or right.
• Use and to increment or decrement the numeric value.
•Press to calculate and save the new coefficient based on the
entered span concentration.
XXLO WCONCENTRATIONXXLO W
CO 15.80 PPM
SAMPLE 12:34 ALARMx
CO BACKGROUND:
CO: 15.80
CURRENTLY: 0.0 ?


 SET CO TO ZERO
RANGE AVG DIAGS ALARM