Calculator for absolute flux measurement using XPD100 (c)P.Revesz, 2014:

Energy (eV):     

Voltage (V):     

Atten (%/100):  

Gain (1,10,..):   


Flux (ph/s):      


The unit works within flux range of 1E4 to 1E9 ph/s. For higher fluxes attenuator should be used.
The attenuation can be obtained from here:  http://henke.lbl.gov/optical_constants/filter2.html