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: 23.873472
dt[ms]=    0.000 
dt[ms]=    2.277 
dt[ms]=    3.252 
dt[ms]=    0.938 
dt[ms]=    2.301 
dt[ms]=    0.945 
dt[ms]=    2.300 
dt[ms]=    1.077 
dt[ms]=    2.300 
dt[ms]=    1.071 
dt[ms]=    2.302 
dt[ms]=    1.078 
dt[ms]=    2.300 
dt[ms]=    0.948 
dt[ms]=    2.315 
dt[ms]=    1.044 
dt[ms]=    2.370 
dt[ms]=    1.033 
dt[ms]=    2.349 
dt[ms]=    0.906 
dt[ms]=    2.286 
dt[ms]=    1.072 
dt[ms]=    2.310 
dt[ms]=    1.080 
dt[ms]=    2.301 
dt[ms]=    1.059 
dt[ms]=    2.312 
dt[ms]=    0.934 
dt[ms]=    2.295 
Acquring readoutnoise patterns
The readoutnoise patterns acquired  105558.44140577306
end
Detected device change on USB
The interface was claimed successfully.
Closing interface 0.