VACUUBRAND CVC 3000 - Manual (Page 54)

page 54 of 80
Adjustment at a reference pressure
Instead of adjustment under vacuum to a pres-
sure < 0.1 Torr (mbar), adjustment to a precise-
ly known reference pressure within the range
of 0..... 15 Torr (20 mbar) is possible.
➨
Evacuate the measurement connection of the CVC 3000 or in case
that of a connected optional external gauge head VSK 3000 to a pres-
sure within 0 ..... 15 Torr (0.....20 mbar).
➨
In ”Configuration” menu, select program ”Adjustment” at the controller.
+
The reading is automatically adjusted to ”zero”.
➨
Use the selection knob to adjust the display to the reference pressure
at the vacuum line within the range of 0 ..... 15 Torr (0.....20 mbar).
➨
Press the selection knob to confirm.
0...15 Torr
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
controller might be doubtful. The diaphragm pump may not achieve the
specified value (due to condensate, poor condition, failure of valves or
diaphragm, leaks).
Gauge head VSP 3000 (accessory)
Read the manual of the gauge head VSP 3000 carefully before in-
stalling or operating the equipment. Observe the instructions con-
tained in that manual.
The display and measuring range of the CVC 3000 with gauge head VSP
3000 is from 7.5 x 10 2 Torr to 1 x 10 -3 Torr (1 x 10 3 mbar to 1 x 10 -3 mbar).
The pressure reading is given in exponential notation.
+
Attention: Maximum pressure reading: 7.5x10 2 Torr
(1x10 3 mbar). Pressure values above 7.5x10 2 Torr
(1x10 3 mbar) are not displayed. Risk of unnoticed
overpressure. Risk of bursting!