User guide

288 Advanced User Guide
9 Columns and Oven
The oven program determines the length of the run. If a flow or
pressure program ends before the analytical run does, the flow
(or pressure) remains at the last final value.
Programming column pressure or flow
1 Press [Col 1] or [Col 2], or press [Aux col #] and enter the
column number.
2 Scroll to Initial pressure (or Initial flow). Type the desired value
and press [Enter].
3 Similarly, enter a value for Initial time. This completes the
initial part of the program.
4 To begin a ramp, enter a positive value for Rate 1. It does not
matter whether you are programming up or down—the rate
is always positive.
5 If Rate 1 is zero, the program ends here. If you enter any
other value, the Final value lines for the first ramp appear
and the cursor moves to the line.
6 Enter values for Final pressure 1 (or Final flow 1) and Final
time 1. This completes the first ramp.
7 To enter a second ramp, scroll to the appropriate Rate line
and repeat steps 5 and 6. A maximum of 20 ramps can be
entered.