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: 24.68592
dt[ms]=    0.000 
dt[ms]=    3.286 
dt[ms]=    3.253 
dt[ms]=    0.933 
dt[ms]=    2.300 
dt[ms]=    0.951 
dt[ms]=    2.300 
dt[ms]=    1.071 
dt[ms]=    2.316 
dt[ms]=    1.062 
dt[ms]=    2.299 
dt[ms]=    1.074 
dt[ms]=    2.298 
dt[ms]=    0.952 
dt[ms]=    2.308 
dt[ms]=    1.066 
dt[ms]=    2.298 
dt[ms]=    1.078 
dt[ms]=    2.300 
dt[ms]=    0.947 
dt[ms]=    2.308 
dt[ms]=    1.069 
dt[ms]=    2.300 
dt[ms]=    1.073 
dt[ms]=    2.299 
dt[ms]=    0.951 
dt[ms]=    2.311 
dt[ms]=    1.064 
dt[ms]=    2.299 
Acquring readoutnoise patterns
The readoutnoise patterns acquired  116.46808137382823
end
Detected device change on USB
The interface was claimed successfully.
Closing interface 0.