User`s guide

4-38

Operation 4

Programming Examples

Two example programs are given below. Before

running these example programs, ensure that the

hydraulic circuit is properly connected.

Example 1

In the example given in List 1, the flow rate will

start at 1 mL/min and increase to 4 mL/min after

2 minutes. The composition will be constant at

100% solvent A. An output will close at 0.00 min-

utes to start the integrator. The method will only

operate once and will not link to another file when

it is finished. Enter this program following the steps

given Program list 1.

Note that it is necessary to program a flow rate of

0 mL/min at the end of the program to stop the

flow, the flow does not automatically stop when

the program is finished. It will continue with the

last programmed flow rate. To stop the flow at 4.00

minutes you must program a flow rate of 4 mL/min

at 3.99 minutes and 0.00 mL/min. at 4.00 minutes.

Note on Programming Sheet

Appendix G contains a programming sheet which

can be copied. An example of how to use the

programming sheet is also given. The sequence you

should follow is:

• Fill in the File Number and name

• Fill in the SETUP parameters for your system

• Draw the flow rate and composition gradients on

the graphs provided, remembering to mark the

axes

• Fill in the table for Input/Output operations

• Write the programming steps. Finish one section

before going on to the next, i.e. program all of the

flow rate time points before going on to the

composition time points. The 305 software will

arrange all of the time points in the correct sequence.

After writing the method program, it is necessary

to write the programs for the safety/error files.