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 23 Sampling time 40000.0
Number of pixels: 2048
acquiring the readoutnoise patterns
Loop 1 of infinite
Waiting on trigger
Spectra acquired
Background acquired
Spectra acquired
board temperature: 30.123072
dt[ms]=    0.000 
dt[ms]=    3.290 
dt[ms]=    3.243 
dt[ms]=    3.244 
dt[ms]=    0.940 
dt[ms]=    2.299 
dt[ms]=    1.071 
dt[ms]=    2.314 
dt[ms]=    0.939 
dt[ms]=    2.301 
dt[ms]=    1.070 
dt[ms]=    2.303 
dt[ms]=    1.077 
dt[ms]=    2.308 
dt[ms]=    1.062 
dt[ms]=    2.302 
dt[ms]=    0.952 
dt[ms]=    2.300 
dt[ms]=    1.070 
dt[ms]=    2.310 
dt[ms]=    1.068 
dt[ms]=    2.300 
dt[ms]=    0.946 
Acquring readoutnoise patterns
The readoutnoise patterns acquired  88.82350513992857
end
Detected device change on USB
The interface was claimed successfully.
Closing interface 0.