10 – 14
Transpector CPM Operating Manual
10.6.1.1.1  Spectrum Mode Acquisition Parameters
Figure 10-22  Spectrum mode acquisition parameters
Start Mass (amu)  . . . . . . . . . . . . . . The amu at which the RGA will 
begin scanning.
Stop Mass (amu). . . . . . . . . . . . . . . The amu at which the RGA will 
stop scanning.
Points per amu . . . . . . . . . . . . . . . . The number of points per amu (ppamu) that 
the RGA will monitor.
Setting a Stop Mass value outside of the sensor’s 2222range will create an error. 
For example, if a 200 amu sensor is installed, FabGuard Explorer will not allow a 
250 amu Stop Mass. 
Increasing the number of ppamu will increase the total time it takes to perform a full 
scan. In FabGuard Explorer, there are four different options for ppamu values: 1, 2, 
5 and 10 ppamu.