Zeiss METROTOM 1500 G3, Operating Instructions Manual, Page: 53 / 120

CT scanner
61211-8140502 METROTOM 1500 G3 1.4
4-5
Reference temperature for measurement
Temperature at which the promised measuring accuracy is guaranteed
when the conditions are met.
The following conditions must be met:
– Temperature for measuring operations must be constant for at least
48 hours.
– Temperature fluctuations must not exceed certain values. Limit val-
ues: 2 K/day and 1 K/hour.
Example of a reference temperature for measurement of 20 °C:
Temperature fluctuation Difference Status Measure
Per day
18.2 °C - 20.0 °C 1.8 K OK
20.0 °C - 22.0 °C 2.0 K OK
17.9 °C - 20.0 °C 2.1 K Not OK Wait for 48 hours until the new
temperature set is constant.
Per hour
20.2 °C - 20.0 °C 0.8 K OK
20 °C - 22.0 °C 1.0 K OK
18.9 °C - 20.0 °C 1.1 K Not OK Wait for 48 hours until the new
temperature set is constant.