Tecsis 1351.085.005 Betriebsanleitung Seite 16

Betriebsanleitung - Operating manual
Carefully turn in the pressure relief valve (3) until the valve closes.
You will not notice any hard stop.
Operate the hand pump (5) until the approximate pressure has been
reached, but max. to 20 to 25 bar.
Turn the fine adjustment valve clockwise to increase the pressure or
anti-clockwise to decrease the pressure until the requested test
pressure has been reached precisely (to be read on the reference
measuring instrument).
If you have prepared at previous step a pressure of about
20-25 bar, with the fine adjustment valve (2) you can increase
the pressure now to 35 bar (up to 40 bar, depending on the
volume of the measuring circuit).
After increasing the pressure, the reading may slightly drop
again
thermodynamic effects, the tube connection and the seal ing
gaskets. If the pressure drop does not come to a standstill,
check the measuring circuit for tightness.
Due to the low volume of each compression stroke of the
hand test pump, only small volume test specimens should be
tested.
A pressure reduction is achieved by turning the fine adjustment valve (2)
counter-clockwise first and then by carefully opening the relief valve (3).
Never actuate the change-over valve when the hand test pump
is under pressure or vacuum! Actuate the change-over valve
only when the relief valve is open.
Remove the reference instrument or the test specimen only
when the relief valve (3) is open and no pressure is in the
hand test pump any more.
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for about 30 seconds, which is caused by