Vaisala DRYCAP DM70 Kurzanleitung Seite 8

• The tube temperature must never lie under the dew point of the sample gas. This may
lead to condensation and false results.
• The sample tubing should be of as short length as possible. The surface area should be
minimized using the narrowest tubing that the flow conditions allow.
• The surface finish of the pipework is important. Polished or electro-polished steel is
recommended for best results.
• Hygroscopic materials should be avoided in the sampling lines. Use stainless steel
membranes instead of rubber membranes.
• Impermeable materials should be selected to avoid inward diffusion of moisture through
the sampling tubes and enclosures. Such impermeable materials are, for example, high-
quality stainless steel and metals. Avoid PVC or nylon tubes.
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M212551EN-B