Operation
Service Menu
Thermo Electron Corporation Model 48i Instruction Manual 3-109
Initial S/R Ratio The Initial S/R Ratio screen displays both the initial S/R ratio and the
current S/R ratio. The initial S/R ratio is determined at the factory, and is
used to correct for the slight variations found from one correlation wheel to
another. The only time the initial S/R ratio should be changed is when the
correlation wheel is replaced or sample/reference is between 1.14 and 1.18.
• In the Main Menu, choose Service > Initial S/R Ratio.
• Use the and to move and change the value.
• Press to save set to value as actual value.
• Press to return to the Service menu or to return to the
Run screen.
XXLO WCONCENTRATIONXXLO W
CO 15.80 PPM
SAMPLE 12:34 ALARMX
RESTORE DEFAULT CAL:
RESTORE
ARE YOU SURE YOU WANT TO?x
PRESS ¨ TO CONFIRM RESTORE
RANGE AVG DIAGS ALARM
WARNING This adjustment should only be performed by an instrument
service technician.
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