vacuubrand ME 4C VARIO select, Инструкция по эксплуатации

Страница: 49 / 76

page 49 of 76
Note
: Adjustment under vacuum with an actual pressure
higher than 0.1 Torr (mbar) reduces the accuracy of the
measurement. If the pressure is significantly higher than
0.1 Torr (mbar), adjustment to a reference pressure is rec -
ommended.
Instead of adjustment under vacuum to a pressure < 0.1
Torr (mbar), adjustment to a precisely known reference
pressure within the range of 0..... 15 Torr (20 mbar) is
possible. Evacuate the measurement connection of the
vacuum sensor to a pressure within 0 ..... 15 Torr (0.....20
mbar).
Note
: The accuracy of the value of the reference pressure
will directly affect the accuracy of the adjustment. If the
nominal ultimate vacuum of a diaphragm pump is used
as reference vacuum, the accuracy of the vacuum sensor
might be doubtful. The diaphragm pump may not achieve
the specified value (due to condensate, poor condition,
failure of valves or diaphragm, leaks).
Performing the adjustment
( ➨ see manual of VACUU•SELECT vacuum controller)
Pop-up for the adjustment of connected
vacuum sensors at ambient pressure and
under vacuum.