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: 27.685728
dt[ms]=    0.000 
dt[ms]=    1.319 
dt[ms]=    2.303 
dt[ms]=    0.945 
dt[ms]=    2.300 
dt[ms]=    1.072 
dt[ms]=    2.345 
dt[ms]=    1.032 
dt[ms]=    2.302 
dt[ms]=    0.947 
dt[ms]=    2.302 
dt[ms]=    1.075 
dt[ms]=    2.299 
dt[ms]=    1.073 
dt[ms]=    2.305 
dt[ms]=    0.947 
dt[ms]=    2.298 
dt[ms]=    1.084 
dt[ms]=    2.298 
dt[ms]=    1.069 
dt[ms]=    2.337 
dt[ms]=    1.019 
dt[ms]=    2.359 
Acquring readoutnoise patterns
The readoutnoise patterns acquired  99.00472978773328
end
Detected device change on USB
The interface was claimed successfully.
Closing interface 0.