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: 25.873344
dt[ms]=    0.000 
dt[ms]=    1.096 
dt[ms]=    2.317 
dt[ms]=    1.053 
dt[ms]=    2.391 
dt[ms]=    0.876 
dt[ms]=    2.303 
dt[ms]=    1.073 
dt[ms]=    2.303 
dt[ms]=    1.068 
dt[ms]=    2.314 
dt[ms]=    1.065 
dt[ms]=    2.302 
dt[ms]=    0.944 
dt[ms]=    2.304 
dt[ms]=    1.075 
dt[ms]=    2.310 
dt[ms]=    1.061 
dt[ms]=    2.303 
dt[ms]=    0.951 
dt[ms]=    2.301 
dt[ms]=    1.069 
dt[ms]=    2.314 
dt[ms]=    1.065 
dt[ms]=    2.301 
dt[ms]=    1.070 
dt[ms]=    2.302 
dt[ms]=    0.951 
dt[ms]=    2.311 
Acquring readoutnoise patterns
The readoutnoise patterns acquired  112.8386200191884
end
Detected device change on USB
The interface was claimed successfully.
Closing interface 0.