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: 29.6856
dt[ms]=    0.000 
dt[ms]=    3.373 
dt[ms]=    3.234 
dt[ms]=    3.238 
dt[ms]=    0.939 
dt[ms]=    2.318 
dt[ms]=    0.927 
dt[ms]=    2.303 
dt[ms]=    1.077 
dt[ms]=    2.300 
dt[ms]=    1.070 
dt[ms]=    2.312 
dt[ms]=    0.942 
dt[ms]=    2.301 
dt[ms]=    1.069 
dt[ms]=    2.301 
dt[ms]=    1.076 
dt[ms]=    2.319 
dt[ms]=    0.928 
dt[ms]=    2.304 
dt[ms]=    1.075 
dt[ms]=    2.301 
dt[ms]=    1.070 
Acquring readoutnoise patterns
The readoutnoise patterns acquired  92.15584953974052
end
Detected device change on USB
The interface was claimed successfully.
Closing interface 0.