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: 24.68592
dt[ms]=    0.000 
dt[ms]=    2.346 
dt[ms]=    3.255 
dt[ms]=    0.930 
dt[ms]=    2.309 
dt[ms]=    1.070 
dt[ms]=    2.297 
dt[ms]=    0.947 
dt[ms]=    2.306 
dt[ms]=    1.072 
dt[ms]=    2.307 
dt[ms]=    1.064 
dt[ms]=    2.304 
dt[ms]=    0.949 
dt[ms]=    2.299 
dt[ms]=    1.072 
dt[ms]=    2.314 
dt[ms]=    1.068 
dt[ms]=    2.296 
dt[ms]=    1.073 
dt[ms]=    2.305 
dt[ms]=    0.948 
dt[ms]=    2.309 
dt[ms]=    1.063 
dt[ms]=    2.306 
dt[ms]=    1.073 
dt[ms]=    2.298 
dt[ms]=    0.946 
dt[ms]=    2.316 
Acquring readoutnoise patterns
The readoutnoise patterns acquired  117.18877911940828
end
Detected device change on USB
The interface was claimed successfully.
Closing interface 0.