Je was op zoek naar: kalibreringskontrollen (Deens - Engels)

i så fald må der i den optiske bane indskydes et filter med neutral tæthed og kendt transmissionsfaktor, og kalibreringskontrollen skal indstilles, indtil indikatoren viser den transmissionsprocent, der svarer til filtret med neutral tæthed.
in these cases a neutral density filter of known transmittance shall be inserted in the optical path, and the calibration control shall then be adjusted until the meter reads the percentage transmission of the neutral density filter.

kalibreringskontrollerne justeres ifølge brugsanvisningen, indtil kryoskopmålingen svarer til standardopløsningens frysepunkt.
adjust the calibration controls, as indicated by the manufacturer, until the cryoscope reading is equal to the freezing point of the standard solution.