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: 25.685856
dt[ms]=    0.000 
dt[ms]=    1.209 
dt[ms]=    2.291 
dt[ms]=    1.089 
dt[ms]=    2.299 
dt[ms]=    0.944 
dt[ms]=    2.306 
dt[ms]=    1.072 
dt[ms]=    2.280 
dt[ms]=    1.092 
dt[ms]=    2.307 
dt[ms]=    1.073 
dt[ms]=    2.299 
dt[ms]=    0.947 
dt[ms]=    2.285 
dt[ms]=    1.094 
dt[ms]=    2.300 
dt[ms]=    1.072 
dt[ms]=    2.307 
dt[ms]=    1.072 
dt[ms]=    2.301 
dt[ms]=    0.946 
dt[ms]=    2.306 
dt[ms]=    1.074 
dt[ms]=    2.300 
dt[ms]=    1.070 
dt[ms]=    2.307 
dt[ms]=    0.947 
dt[ms]=    2.299 
Acquring readoutnoise patterns
The readoutnoise patterns acquired  113.1184869453896
end
Detected device change on USB
The interface was claimed successfully.
Closing interface 0.