Cleaning; Storage; Protecting The Measuring Site; Theft And Vandalism - Delta-T Devices SWT5 User Manual

Cleaning

Clean ceramic and sensor body only with a moist towel. If the ceramic
is clogged it may be flushed it with Rehalon®.
If the pores are clogged with clay particles saturate the ceramic and
then polish the ceramic surface with a wetted, waterproof sandpaper
(grain size 150...240).

Storage

If the SWT5 or SWT5x is not be used for a year or more then empty
shaft and sensor body to avoid algae growth. Store both in a dry place.

5 Protecting the measuring site

5.1 Theft and vandalism

The site should be protected against theft and vandalism as well as
against any farming or field work. Therefore, the site should be fenced
and signposts could give information about the purpose of the site.

5.2 Cable protection

Outdoors cables should be protected against rodents with plastic
protection tubes.
Protection tubes are available. Contact us for further details.
In the lab the cables should be fixed so they are not accidentally pulled
away and that there is no risk of stumbling.

5.3 Frost

Tensiometers are filled with water and are endangered by frost. SWT5
and SWT5x should only be use in frost-free surroundings.
Do not store filled Tensiometer at temperatures below 0°C. Do not
leave filled Tensiometers over night in your car, in a measuring hut,
etc.
Do not fill the Tensiometers with Ethanol, as this is corrosive for
some materials (i. e. PMMA) and will destroy these.
SWT5 User Manual v2
Protecting the measuring site  35