fitech ag
Switzerland
Operating Manual
page 5
fitech
-Flowmeter
1.
Choose size of nozzle in accordance with the product to be measured and screw chosen
nozzle (Pos. 5) manually and solidly into the nozzle carrier (Pos. 4).
2.
Remove measuring cylinder (Pos. 3) from pressure cylinder (Pos. 2) by unscrewing
manually. Turning the measuring cylinder upside down, the pressure plate (Pos. 6) slides
out of the cylinder. Ensure it is not dropped on to a hard surface!
3.
Make sure that nozzle (Pos. 5) has been screwed tightly into the nozzle carrier (Pos. 4)
and latter one has been tightly screwed into the measuring cylinder (Pos. 3), tightening
is to be done manually only.
4.
Now fill measuring cylinder (Pos. 3) from the top with the product you intend to measure
by pressing out a cartridge or filling from an other vessel. Ensure that no air bubbles are
locked into the product to be measured. Leave enough room to place the pressure plate
(Pos. 6) above the material.
5.
Screw measuring cylinder (Pos. 3) manually tightly onto the pressure cylinder (Pos. 2).
Make sure O-ring (Pos. 16) is properly positioned on the pressure cylinder so as to
exclude an air leak.
CAUTION: The parts mentioned (nozzle, nozzle carrier, measure and pressure
cylinders) are precision parts with very fine threads. When screwing together
take care not to set threads canted against each other. All parts, including the
pressure plate should be handled with care at all times.
Measurement
6.
First set the Flowmeter to the desired pressure. This is attained by positioning the hand
lever (Pos. 8) to 'pressure' and by subsequently adjusting pressure shown on the
pressure gage (Pos. 7) to the desired pressure by adjusting the pressure regulator
(Pos. 9) accordingly.
7.
Position your laboratory scales, together with a vessel into which the measured product
may flow, under the nozzle, tare the scales.
8.
The measuring of the flow is done by starting simultaneously a stop-watch and switching
the pressure on with the hand valve (Pos. 8) to ON. After reaching the desired measuring
period switch off both simultaneously again, the stop-watch and the pressure valve
(Pos. 8).
Please note that since the amount pressed through the nozzle is generally small, it offers you
the possibility to get two to three measurements for comparison.
CAUTION: Should the product to be measured react with humidity in the air used
for flow measurements, it is up to you to decide on whether to use dried air or
rather nitrogen!
