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: 25.748352
dt[ms]=    0.000 
dt[ms]=    3.330 
dt[ms]=    3.232 
dt[ms]=    0.938 
dt[ms]=    2.301 
dt[ms]=    1.067 
dt[ms]=    2.326 
dt[ms]=    0.928 
dt[ms]=    2.302 
dt[ms]=    1.069 
dt[ms]=    2.304 
dt[ms]=    1.075 
dt[ms]=    2.320 
dt[ms]=    1.052 
dt[ms]=    2.303 
dt[ms]=    0.950 
dt[ms]=    2.302 
dt[ms]=    1.069 
dt[ms]=    2.314 
dt[ms]=    1.066 
dt[ms]=    2.301 
dt[ms]=    0.944 
dt[ms]=    2.304 
dt[ms]=    1.075 
dt[ms]=    2.327 
dt[ms]=    1.046 
dt[ms]=    2.303 
dt[ms]=    0.951 
dt[ms]=    2.302 
Acquring readoutnoise patterns
The readoutnoise patterns acquired  113.37665412389886
end
Detected device change on USB
The interface was claimed successfully.
Closing interface 0.