Adjustment At A Reference Pressure; Repairs; Maintenance - Heidolph Hei-VAC Control Betriebsanleitung

Appendix
The readjustment of a VSP 3000 can only be carried out in warmed-up
state.
Adjustment is not possible during the warm-up time.
Use a high vacuum pump for the adjustment of a VSP sensor.
After connection to power supply and after the pressure has reached
< 10-3 mbar, wait 20 minutes before adjusting the VSP sensor.
Carry out the adjustment in the same order as described above for VSK.

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.
➜
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).
➜
Call up menu Configuration.
➜
Turn the selection knob and place the bar marking on
Adjustment.
➜
Press the selection knob.
➜
Marking jumps to numeric value.
➜
Adjust the pressure value to the actual reference pressure by turning the selection knob.
➜
Press the selection knob.
➜
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 refer-
ence vacuum, the accuracy of the controller might be doubtful. The
diaphragm pump may not achieve the specified vacuum (due to conden-
sate, poor condition, failure of valves or diaphragm, leaks).

Repairs

Repairs to the device may only be carried out by authorized experts! Unauthorized repairs
during the warranty period will result in the loss of the warranty claim. The owner is solely
liable for damage caused by unauthorized repairs.
If repairs are required, contact an authorized dealer or our technical service, see „Contact
information Heidolph international" on page 102. Include the completed certificate of decon-
tamination with every device return, see „Certificate of decontamination" on page 103.

Maintenance

There are no user-serviceable components in the unit housing. If necessary (in the event of
abnormal operating behavior such as excessive noise or heat generation, for example), contact
our technical service, see „Contact information Heidolph international" on page 102.
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