Linux native USB library loaded.
spectrometer type: HR2000+ s/n: HR+C1886 number of channels: 1 firmware: 3.30.0 
Integration time 1.67 [ms], number of spectra 29 Sampling time 50000.0
Number of pixels: 2048
acquiring the readoutnoise patterns
Loop 1 of infinite
Waiting on trigger
Spectra acquired
Background acquired
Spectra acquired
board temperature: 24.435936
dt[ms]=    0.000 
dt[ms]=    1.131 
dt[ms]=    2.314 
dt[ms]=    1.055 
dt[ms]=    2.304 
dt[ms]=    0.930 
dt[ms]=    2.336 
dt[ms]=    1.046 
dt[ms]=    2.315 
dt[ms]=    1.072 
dt[ms]=    2.314 
dt[ms]=    1.078 
dt[ms]=    2.327 
dt[ms]=    0.890 
dt[ms]=    2.336 
dt[ms]=    1.041 
dt[ms]=    2.314 
dt[ms]=    1.062 
dt[ms]=    2.334 
dt[ms]=    0.933 
dt[ms]=    2.306 
dt[ms]=    1.050 
dt[ms]=    2.327 
dt[ms]=    1.068 
dt[ms]=    2.305 
dt[ms]=    1.066 
dt[ms]=    2.312 
dt[ms]=    0.942 
dt[ms]=    2.286 
Acquring readoutnoise patterns
The readoutnoise patterns acquired  116.52299361990859
end
Detected device change on USB
The interface was claimed successfully.
Closing interface 0.