ECO GOLD
25/08/2011/ YACE0088
Before putting the device into operation
31
6.4
Heat transfer liquids, cooling water and hoses
Note:
−
Tap water is unsuitable for operation with the thermostat due to the calcium carbonate content. The bath
vessel may calcify.
−
High purity water (from ion exchangers) and distilled or bidistilled water are unsuitable for operation due
to the corrosive properties of these media. High purity water and distillates are suitable as a medium after
the addition of 0.1 g of soda (Na
2
CO
3
, sodium carbonate) per liter of water.
−
Water containing iron (rust formation), chlorine (pitting) and untreated river water ("algae formation") is
unsuitable.
−
The bath vessels of the LAUDA ECO thermostats are produced in stainless steel 1.4301 and are accord-
ingly resistant to mechanical and chemical stresses.
−
Metals have different electrochemical potentials. Therefore, in the case of direct contact between the tank
and a frame (copper for example) electrochemical oxidation may occur. The bath corrodes despite the
use of high quality materials on the tank. Avoid the use of this type of frame or direct contact with it or
contact with non-ferrous metal samples and the inside of the container. Use original LAUDA stainless
steel frames or commercially available frames in temperature-resistant plastics.
