VACUUBRAND VNC 1 - Manual (Page 25)

Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check
carefully the validity of this document with respect to his product. Manual-no.: 999118 / 16/12/2009
page 25 of 35
The VACUUBRAND DKD calibration laboratory is accredited by the Physikalisch-Technische Bundesanstalt
(PTB; German national institute for science and technology and the highest technical authority of the
Federal Republic of Germany for the field of meteorology and certain sectors of safety engineering) for the
measurable variable pressure in the pressure range from 10
-3 mbar to 1000 mbar in accordance with
the general criteria for the operation of testing laboratories defined in DIN EN/ISO/IEC 17025:2000.
Calibration in the VACUUBRAND calibration laboratory:
-
To meet the requirements of the DIN ISO 9000ff and 10012 series of standards regarding the calibration
of inspection, measuring and test equipment at specified intervals.
- To document that the vacuum gauges calibrated are traceable to national standards of the PTB.
The controller VNC 1 is equipped with a serial interface (RS 232C, nine-pole Sub-D-plug).
☞ Respectively plug-into or remove the cable (cable RS 232C) from the interface only if the equipment is
switched off.
☞ The interface is not electrically isolated from the measuring circuit.
☞ For optimal electromagnetic compatibility assemble an interface filter (cat. no.: 63 82 35).
The controller can be operated via serial interface. Measuring results, preselections and the status of the
controller can be read at any time.
Setting of the interface
Setting of the interface parameters directly at the controller is described below. Enter the device menu
”Select RS 232”. The factory set values are underlined.
➨ Baud 9600, 2400, 4800 or 19200
➨ 7 data bits odd (Databits 7, Parity Odd); 7 data bits even (Databits 7, Parity Even);
7 data bits none (Databits 8, Parity None); 8 data bits none (Databits 8, Parity None)
➨ no Handshake (Handsh. None), XON/XOFF Handshake (Handsh. Xon-Xoff)
➨ Remote on, Remote off
➨ Startbit = 1, Stopbit = 1 (Stopbit = 2 at 7 data bits none)
In remote mode (Remote on, ”P” is displayed) all keys at the controller are without function. To return to
the manual operation of the controller set the controller to the mode ”Remote off” via the interface or
switch off controller and enter the device menu within the first 2s after having switched on the controller
again.
Read commands can be sent always. The sending of write commands is only possible, if the remote mode
(Remote on) is selected.
DKD Calibration Controller VNC 1 .............................................................................................. 90 02 17
Calibration in the factory
Control of measuring equipment
Interface parameters