Thermo 48i - Calibration Menu

Operation
Calibration Menu
Thermo Electron Corporation Model 48i Instruction Manual 3-23
two ranges used are not close to one another. For example, a low CO range
of 50 ppm and a high CO range of 1000 ppm. For more information about
calibration, see Chapter 4, “Calibration”.
• In the Main Menu, choose Calibration.
• Use and to move the cursor up and down.
• Press to accept the choice.
• Press to return to the Main Menu or to return to the Run
screen.
Calibrate CO Background The Calibrate CO Background screen is used to adjust the CO background,
or perform a “zero calibration”. Before performing a zero calibration, ensure
the analyzer samples zero air for at least 5 minutes.
XXLO WCONCENTRATIONXXLO W
CO 15.80 PPM
SAMPLE 12:34 ALARMx
CALIBRATION:
>CAL BACKGROUND
CAL COEF
ZERO/SPAN CHECK
RANGE AVG DIAGS ALARM
XLOWWRANGE CONCENTRATION W
CO 15.80 PPM
SAMPLE 12:34 ALARMx
CALIBRATION:
>CAL BACKGROUND
CAL HI COEF
CAL LO COEF
RANGE AVG DIAGS ALARM