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UF V (E3) 10/2020 Page 43/119
8. Placing samples in storage in the freezer
Before storing valuable samples, conduct a 10-days test run at the desired temperature. This helps to detect
transport damages like capillary cracks. Then you can load the freezer with the precooled samples.
WARNING: If customer should use a freezer running in non-supervised continuous opera-
tion, we strongly recommend in case of inclusion of irrecoverable specimen or samples to
split such specimen or samples and store them in at least two chambers, if this is feasible.
During the equilibration phase of approx. 8 hours after turning on the chamber, undefined temperature
conditions occur within the chamber. During this phase, do not place any sample materials in the chamber
NOTICE
Danger of temperature fluctuation.
Destruction of samples.
Load the freezer only after equilibration of temperature.
When placing not precooled samples in storage, temperature rises inside the freezer. We recommend to
successively load the freezer. The more thermal energy you bring in, the longer it takes until reaching the
set-point temperature again.
Do not exceed the maximum load of each compartment and the permitted total load (see chap.27.3).
The inner surfaces become very cold during operation. Always wear protective gloves when opening the
freezer and bringing in or removing material.
CAUTION
Danger of injury by freezing on when touching cold chamber parts during operation.
Local frostbite.
∅ Do NOT directly touch the inner surfaces or the charging material during operation.
∅ AVOID skin contact with the inner surfaces and accessory equipment.
Wear protective gloves when opening the inner doors and during manipulation.
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