147
Adjustment at a reference pressure
Instead of adjustment under vacuum to a pressure < 0,1 mbar
(< 0.1 Torr), adjustment to a precisely known reference pressure
within the range of 0 – 20 mbar (0 – 15 Torr) is possible.
1.
Evacuate the measurement connection of the controller or in
case the connected external vacuum sensor VSK 3000 to a
pressure in the range of 0 – 20 mbar (0 – 15 Torr).
2.
Call up menu
Configuration
.
3.
Turn the
selection knob
and place the bar marking on
Adjustment
.
4.
Press the
selection knob
.
5
Marking jumps to numeric value.
5.
Adjust the pressure value to the actual reference pressure by
turning the
selection knob
.
6.
Press the
selection knob
.
5
Sensor adjusted to reference pressure.
The measurement uncertainty of the reference pressure will
directly affect the measurement uncertainty of the controller.
If the nominal ultimate vacuum of a diaphragm pump is used
as reference vacuum, the accuracy of the controller might be
doubtful. The diaphragm pump may not achieve the specified
vacuum (due to condensate, poor condition, failure of valves or
diaphragm, leaks).
For further descriptions about
Adjustment
see chapter:
7.3 Configuration menu on page 129
IMPORTANT!
Adjustment at
reference pressure
Summary of Contents for 036308001
Page 1: ...Betriebsanleitung Operating instructions Hei VAC Control Intelligent evaporation...
Page 6: ...Erste Schritte First steps Neuger t Erste Schritte Neuger t First steps delivery status...
Page 39: ...38 6 2 Sprache und Druckeinheit einstellen Sprache und Druckeinheit einstellen 5 Startbild...
Page 81: ...81 First steps delivery status First steps on delivery status Select language and units...
Page 114: ...114 6 2 Select language and pressure unit Select language and pressure unit 5 Initial screen...
Page 154: ......
