2017-05-30
TRIME
®
-PICO IPH Version 2_0
Page 27
Fill up one bucket until the rods of the probe can be immersed completely. To obtain a
consistent density, knock the bucket on the ground several times.
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 electri-
cal 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 pe-
riod, three times is sufficient.
Please note that the electrical conductivity of the water-saturated glass beads medium
increases already after a few days storage. Therefore the glass beads must be washed
again before the next calibration.
11.3.2
Basic calibration procedure
Basic calibration must be performed using the calibration program
TRIME-Tool . Please
read the information about basic calibration with
TRIME-Tool in the Help function of the
