Teledyne GC-Pro/FID - Gas Chromatograph - Manual (Page 88)

Operation GC-Pro FID
Teledyne Analytical Instruments 74
Once the input range has been decided, press the corresponding LED
icon to turn it on. Touch the input box and a numerical keypad will
display from which you can enter the upper range limit (the lower limit
on each range is always zero). Once the value is entered, press ENTER
to dismiss the keypad and enter the value into the range box selected.
When finished, touch the ENTER button and the inputs with the glowing
yellow LED will be converted in other available units and a confirmation pop
up window will appear. Press “OK” button to proceed further.
Repeat the procedure for the other two ranges.
If the range values entered by the user does not follow the order
R3>R2>R1 then a warning will display.
Touching the “OK” button allows the user to input the values again.
If the input values follow the order R3>R2>R1; a final confirmation
window pops up on the screen. Select OK to save or CANCEL ignore
the entered inputs.
4.7.12.3 C HANGE S TREAM
The Change Stream function is used to manually select between
sample and calibration (span and zero) gases.