UGO BASILE 37240, Руководство пользователя

Страница: 14 / 35

Operation
14
6. Operation
6.1. Setting-Up the Plethysmometer
Place the Electronic Unit and the Stand on a stable and reasonably flat bench/
table (stand, clamp and reservoir may differ from what
featured in the picture).
Fasten the water cell to the laboratory stand by means of the
enclosed clamp.
Insert the water tank on the same stand, and fix it by the
black plastic screw.
The cell is fitted with two valves, one for cell loading and
one for cell unloading. Use the 8mm polyurethane tube to
connect the water tank to the loading tap and another piece
of polyurethane tube from the unloading tap to a sink.
Keep both valves wings
vertical (SHUT) and
fill the reservoir with
a solution prepared
in a separate vessel,
( see paragraph “6.1.1.
Preparing the Dipping
Solution” ).
Combine a gentle
push and rotation of the transducer head to make sure it is properly fitted to the
smaller tube.
Fill the cell by opening the loading valve by turning its wing horizontally. Keep the
unloading tap closed while filling.
Close the loading valve to stop the flow and open the unloading valve to drain; fill
and drain a couple of times to practice and to purge the system from air bubbles.
Adjust the liquid level in the marked range, close to the lower red line.
6.1.1. Preparing the dipping solution
While the Plethysmometer can work with a simple tap water solution, to ensure
correct measurement we strongly recommend to prepare and use 1 litre of a
dipping solution as follow:
Add to a 1 litre of distilled water the following components:
• 3 ml of wetting compound (provided with standard package) which minimizes
drop and meniscus build-up, leading to more accurate measures.
• 0.8-0.9 g of NaCl (salt). Conductivity attained by this concentration provides
optimum transducer performances.
Back to Contents