vacuubrand PC 2001 Vario Instructions For Use Manual

vacuubrand PC 2001 Vario Instructions For Use Manual Manual pdf 33 page image

page 33 of 49Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to checkcarefully the validity of this document with respect to his product. manual-no.: 999100 / 06/05/2008The vacuum gauge was adjusted using factory standards, which are traceable throughregular calibration in an accredited laboratory (German Calibration service) to the na-tional standard. Depending on the process and/or accuracy requirements, check theadjustment and readjust if necessary. For readjustment, the device has to be adjustedboth at atmospheric pressure as well as under vacuum.The adjustment mode can be activated only if the process control is inactive. Presskey STOP if necessary.ReadjustmentAdjustment at atmospheric pressureVentilate the controller and/or the vacuum system. Make surethat the vacuum connection at the controller is at atmosphericpressure.➨ Press key p▲ or p▼ simultaneously with key MODE, thecontroller then switches to the adjustment mode.☞ The warning triangle and CAL are displayed for approx. 2seconds.➨ While CAL is displayed, press key START/STOP.➨ Use key p▲ or p▼ to adjust the reading to the actual at-mospheric pressure.➨ Press key STOP to confirm.Note: To determine the actual atmospheric pressure, use an accurate barometer or get accurate readingfrom the weather service, the next airport.......(take into account the difference in altitude between e. g.airport and laboratory).p+CALAdjustment under vacuumEvacuate the controller to a pressure < 0.5 mbar (e. g. by apply-ing a good rotary vane pump).➨ Press key p▲ or p▼ simultaneously with key MODE, thecontroller then switches to the adjustment mode.☞ The warning triangle and CAL are displayed for approx. 2seconds.➨ While CAL is displayed, press key START/STOP.☞ The reading is automatically adjusted to ”zero”.➨ Press key STOP to confirm.Note: Adjustment under vacuum with an actual pressure higher than 0.5 mbar reduces the accuracy of themeasurement. If the pressure is significantly higher than 0.5 mbar, adjustment to a reference pressure isrecommended.pMODE+CALAdjustment at a reference pressureInstead of adjustment under vacuum to a pressure < 0.5 mbar,adjustment to a reference pressure within the range of 0 ..... 20mbar is possible.➨ Press key p▲ or p▼ simultaneously with key MODE, thecontroller then switches to the adjustment mode.☞ The warning triangle and CAL are displayed for approx. 2seconds.➨ While CAL is displayed, press key START/STOP.☞ The reading is automatically adjusted to ”zero”.➨ Use keys p▲ or p▼ to adjust the display to the referencepressure at the vacuum line within the range of 0 ..... 20mbar.➨ Press key STOP to confirm.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 thecontroller might be doubtful. The diaphragm pump may not achieve the specified value (due to condensate,poor state, failure of valves or the diaphragm).pMODE+CALp0 .... 20 mbarMODE