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: 24.9984
dt[ms]=    0.000 
dt[ms]=    1.040 
dt[ms]=    2.338 
dt[ms]=    0.960 
dt[ms]=    2.310 
dt[ms]=    1.054 
dt[ms]=    2.308 
dt[ms]=    1.060 
dt[ms]=    2.320 
dt[ms]=    1.090 
dt[ms]=    2.274 
dt[ms]=    0.954 
dt[ms]=    2.289 
dt[ms]=    1.079 
dt[ms]=    2.285 
dt[ms]=    1.082 
dt[ms]=    2.308 
dt[ms]=    0.937 
dt[ms]=    2.304 
dt[ms]=    1.060 
dt[ms]=    2.309 
dt[ms]=    1.094 
dt[ms]=    2.304 
dt[ms]=    1.027 
dt[ms]=    2.317 
dt[ms]=    0.951 
dt[ms]=    2.279 
dt[ms]=    1.090 
dt[ms]=    2.308 
Acquring readoutnoise patterns
The readoutnoise patterns acquired  106985.02245153738
end
Detected device change on USB
The interface was claimed successfully.
Closing interface 0.