... 37±0.1 centigradeOptical systemLight source: 12V 20W, halogen lamp with lifetime more than 2000 hoursSpectrometer: post spectrometer with ... 630nm, 670nmAbsorbance range: 0~6Calibration/QCCalibration type: single point linear, two points linear, multi-points linear, Logit-4P, Logit-5P,Spline, ... calibration curve.QC type: real time QC, daily QC, day to day QCQC chart: L-J, Cumulative sum check ...