Page 109 - SICCO catalog

Proper use of desiccant
The humidity in your desiccator can be reduced most rapidly if you spread it on a big surface. The provided desiccant tray is best suitable for it. Please make sure that the desiccant surface is not higher than one centi- meter. If you have to increase the desiccant quantity for your experiment, please take another tray.
Up to 16 g humidity can be absorbed by the SICCO desiccant within 24 hours.
Regeneration of Silicagel
Silicagel has a color-indicator that shows the rate of saturation of the desiccant. Orange means dried and absorptive, dark brown to black means saturated. To regenerate the desiccant, put it into the oven at 90-110°C together with the provided tray for 90 minutes. A microwave is unsuitable for this. You have to calculate 90 minutes for regeneration per centimeter filling height. Overheated desiccant is destroyed and cannot be regenera- ted. Please store the not required Silicagel in an hermetically sealed jar.
Reduction of humidity
In the desiccators without automatic drying, the reduction of humidity oc- curs through the inserting of Silicagel. This desiccant has the property to bind humidity from the environment. If the desiccant is saturated, it can be regenerated. If humidity does not decrease as required, the Silicagel
is already saturated or too less Silicagel is used. Increase the portion. Check if the door closes correctly or if the sealing is damaged. Check the displayed values of the built-in hygrometer by comparing with another one. In case the residual moisture is outside of the measuring range, the built-in hygrometer is not able to display correct values. You will find the detailed measuring range on page 80.
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