Thermo Scientific HAAKE Instruction Manual page 21

Calibration
The calibration fluids should be stored in dark rooms and be
used within 3 months after their date of expiry.
The disposal depends of the composition of the substance
which is listed in the "EC - - SAFETY DATA SHEET".
It is absolutely essential that for calibration the instructions
for filling the tube and cleaning are closely adhered to.
It is very important to observe the test temperature of the cal-
ibration liquids as indicated on the bottles.
To avoid contamination the test fluid should never
be poured back into the original bottle.
An officially calibrated thermometer is required which allows
reading the temperature with an accuracy of  0.02C.
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