Fluids - Thermo Scientific STANDARD Series Manual

DANGER
DANGER
CAUTION
CAUTION
CAUTION
CAUTION
Thermo Scientific

Fluids

The user is always responsible for the fluid used. Never use
corrosive fluids with this unit.
Never use 100% glycol.
Handling and disposal of liquids other than water should be done
in accordance with the fluid manufacturers specification and/or the
MSDS for the fluid used.
Always adjust the unit's software to the fluid used, see Section 4.
When using water above 80°C closely monitor the fluid level,
frequent top-offs will be required. It will also create steam.
Water/glycol mixtures require top-offs with pure water, otherwise
the percentage of glycol will increase resulting in high viscosity and
poor performance.
Thermo Fisher Scientific takes no responsibility for damages caused by
the selection of an unsuitable bath fluid.
Unsuitable bath fluids are fluids which:
• are very highly viscous (much higher than 30 mPas at the respective
working temperature)
• have corrosive characteristics or
• tend to break down at high temperatures
For fluid selection consider application requirements, operating
temperature range, material compatibility, safety concerns, and
environmental issues.
5°C to 95°C — Distilled Water or Deionized Water (up to 3 MΩ-cm)
Normal tap water leads to calcareous deposits necessitating frequent unit
decalcification, see table on next page.
Calcium tends to deposit itself on the heating element. The heating
capacity is reduced and service life shortened.
-30°C to 80°C — Water with Glycol
Below 5°C water has to be mixed with a glycol. The amount of glycol
added should cover a temperature range 5°C lower than the operating
temperature of the particular application. This will prevent the water/
glycol from gelling (freezing) near the evaporating coil.
Excess glycol deteriorates the temperature accuracy due to its high
viscosity.
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Section 3 Installation
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3-7