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: 21.811104
dt[ms]=    0.000 
dt[ms]=    0.962 
dt[ms]=    2.323 
dt[ms]=    1.062 
dt[ms]=    2.319 
dt[ms]=    1.036 
dt[ms]=    2.325 
dt[ms]=    0.937 
dt[ms]=    2.329 
dt[ms]=    1.037 
dt[ms]=    2.335 
dt[ms]=    1.040 
dt[ms]=    2.308 
dt[ms]=    0.952 
dt[ms]=    2.309 
dt[ms]=    1.061 
dt[ms]=    2.303 
dt[ms]=    1.063 
dt[ms]=    2.322 
dt[ms]=    1.072 
dt[ms]=    2.309 
dt[ms]=    0.936 
dt[ms]=    2.313 
Acquring readoutnoise patterns
The readoutnoise patterns acquired  117.7050288896042
end
Detected device change on USB
The interface was claimed successfully.
Closing interface 0.