Chapter 3 Operation
3-70
Initial S/R Ratio
The Initial S/R Ratio screen, shown below, 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 after
factory consultation. Normally, when zero air is being sampled, the sample/reference
ratio is between 1.14 and 1.18.
To display the Initial S/R Ratio:
From the Main Menu choose Service Mode
From the Service Mode menu choose Initial S/R Ratio
To use the Initial S/R Ratio screen:
Use the
↑
and
↓
pushbuttons to increment/decrement the value
Use the
←
and
→
pushbuttons to move the cursor left and right
Press
ENTER
to accept the change
Press
MENU
to return to the Service Mode menu
Press
RUN
to return to the Run screen
Initial S/R Ratio
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