IMKO TRIME-PICO 32, Руководство пользователя

Страница: 18 / 48

Manual TRIME_PICO64-32 Version 2_0 2017-05-30
Page 18
The density of the glass beads increases with frequent insertion of probes. Therefore the glass beads should be poured
out into another bucket and poured back to achieve the original density.
Now the second bucket has to be filled with water in order to be able to fill in the glass beads without
leaving air-bubbles. An additional precaution against air-bubbles is to stir slightly while filling in the glass
beads. The container must now be knocked on the ground several times to obtain a consistent density.
The surplus water must be poured out until the depth of the water film above the glass beads is less
than 2mm.
The water-saturated glass beads should be in a temperature range between 20°C and 25°.
Attention: Water dissolves Na
2
O and K
2
O from glass which causes a rising pH-value and higher electrical conductivity.
New glass beads have to be washed intensively with tap water!!!
1. Fill a bucket with water
2. Stir the beads under water to drive out all air bubbles
3. Pour out the water. This procedure should be done with new glass beads at least five times, each time
with fresh water. If the glass beads have been in use for a prolonged period, three times is sufficient.
Please note that the electrical conductivity of the water-saturated glass beads medium increases al-
ready after a few days storage.
Therefore the glass beads must be washed again before the next calibra-
tion.
6.3.2 Basic calibration procedure
Basic calibration must be performed using the calibration program Pico-Config . Please read the infor-
mation about basic calibration with Pico-Config in chapter 12 of this document.