FlowScanner User Guide Retried QRP file instead of Old FlowScanner Report. No room on disk for FlowScanner Report File. 14. Analysis incorrect, ”fit–line” not drawn to data spread Auto Analysis not finding range property, set analysis range manually with cursors. Some data conditions can cause the software to analyze the curve beyond the linear region. Set the left and right cursors to just inside the linear region before analyzing. Non–Linear cam in the positioner – A non–linear cam will not analyze to a linear fit, so the zero and span numbers may be off, and of course, linearity numbers will be high. Note the end points manually on the print–out. 15. Bench–set calculation appears incorrect Actual Travel different from nominal travel – The Bench–Set is based on the nominal travel entered on the Nametag. The analysis first fits the mid–line curve to the data and then located the end of the curve at the upper travel stop. An ”X” is drawn on the FIT line at the point. Then a ”X’ is drawn at the nominal travel point, and pressures at these points are used for the bench set. Fit line extends into non–linear area – If a high friction area or pilot spring area is included in the auto–analysis region the fit line can be skewed. Move cursors to the ends of the linear region before analyzing. Nametag mis–labeled for OPEN position – The bench set is calculated from the upper travel stop. If the wrong position is identified the bench set will be off. 16. Seat Load calculation incorrect Curve shape not ”typical” and points taken not representative of the pressure build–up. Circles are drawn around the points used for the seat–load calculation. If they are not in the right place, use the top and bottom cursors to identify the correct pressures before analyzing. Unbalance area or ”Pressure Tends To” entry wrong on nametag, this will make the service seat load incorrect. Wrong Service Pressures entered on Nametag – Enter the service pressures at shutoff as closely as possible. If they aren’t known at all, don’t enter any pressures, as the calculation could be misleading.
88