The following step by step procedure should be followed when running the compressors to collect data.
The following procedure should be followed when shutting down the compressor and data acquisition components.
Handling the Data
The data will be labeled with the following file format. C1_aaa_01
The first two digits correspond to the compressor number. The next three letters correspond to the run number, and the last two numbers correspond to the channel number. Each individual channel is saved as a text file and copied via. ftp onto the uni versity’s server. Once all channels are on the server, an integration program can be run to determine the average value over a predetermined time interval. The integration program is given in Appendix I. The integration being performed is based on the routine by Gill and Miller, which performs a 3rd-order finite differentiating method using uneven time intervals. The integration program is designed to return all the integrated averages, the time interval of each integration, and the average of the whole data set. The output files of this integration program can then be imported into the Sigma Plotâ spreadsheet program. Once plots are arranged to display the data in graphical form, they can be called up as a template and the new data will be automatically fit into the previous setup. Examples of these plots are shown in Appendix E.