The most accurate in-situ test systems available. The CAT and VDS are designed to eliminate all common sources of error when doing in-situ measurements. They measure and correct for pressure sensor performance, leak rates, chamber volume and can compensate for different temperature zones within a tested systems chamber. Very few built in diagnostic procedures have even an adequate knowledge of their own chamber volume much less any other type of compensation. The CAT and VDS offer complete testing of all parameters on all systems.
Most systems only offer a few tests.
The VDS also provides an off-line testing capability. The CAT and VDS provides more real time information Real time data and graphics convey much more complete and accurate information than systems which only provide numeric readings based on a few data points. During it's testing the CAT and VDS acquire data several times per second. This data is plotted on the screen and advanced data analysis algorithms convert the raw data into useful real time performance information. Leak rate plots, manometer response graphs, pump speed curves and MFC flow rate graphs all provide extremely valuable data about the real time performance of the system.