Approved Fluids - Fisher Scientific Isotemp Manual Del Usuario

CAUTION
Fisher Scientific

Approved Fluids

The only approved fluids for all Isotemp baths are:
Filtered/Single Distilled Water
De-ionized Water
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For applications requiring resistivity greater than 1 MΩ-cm or maintaining
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resistivity levels greater than 1 MΩ-cm please call and speak to an
applications engineer for additional information.
Fisher Scientific takes no responsibility for damages caused by using an unapproved fluid.
When using water above 80°C closely monitor the fluid level, frequent top-offs will be
required. It will also create steam.
Filtered/Single Distilled Water
Filtered drinking water and single distilled water are good choices for heated water baths. The
filtering/distilling process removes microorganisms that are known to cause biological fouling
in water baths. The filtering/distilling process also removes minerals and harmful particulates
from water. Microorganisms, minerals and particulates can lead to deposits and or scaling that
eventually promotes corrosion if not removed or treated.
It is also recommended to regularly drain and replace fluid especially when higher temperatures
are utilized (above 40°C). Draining and drying the bath after each use is recommended as leaving
standing water for any period of time is known to lead to a buildup of biologic growth.
Tap Water
Usage of tap water may not cause any adverse affects on the equipment in the short term, but in
the long term problems may arise due to precipitation of minerals and or development of algae
and bacteria. Please refer to "Process Water Quality and Standard" recommendations in this
chapter for guidelines on water usage.
Chlorine
Draining and replacing "used" water is the best preventative maintenance for the cooling/heating
equipment. Biological organisms will develop in water that is not replaced or treated regularly. A
mild treatment using an algaecide can help extend the useful life of water.
To help alleviate bacteria or algae growth Fisher Scientific recommends the use of small amounts
of chlorine. The usage of chlorine needs to be monitored over time in order to prevent the
formation of corrosion.
The duration of time that chlorine remains in solution depends on factors such as water
temperature, pH and availability of direct sunlight. We recommend maintaining chlorine levels
Chapter 3
Installation |
3-3
Isotemp |