VNC 2
The vacuum controller VNC 2 makes automatic, on-demand vacuum control possible either via two-point valve control or by switching the pump on/off. The version VNC 2 VARIO offers continuous vacuum control with VARIO® pumps. The integrated alumina ceramic diaphragm vacuum sensor is chemically resistant and offers outstanding measuring accuracy independent of gas type. The VNC 2 vacuum controller is designed for precise and reliable control of recurrent routine jobs that do not require regular adjustment. It works with components compatible with the VACUU·BUS® system. Special versions of the controller, e.g., for mounting into laboratory furniture are available. Further information on request.
Performance features
- on-demand control of process vacuum, cooling water and venting; special program for operating vacuum networks like VACUU·LAN®
- easy changing of vacuum set points also during operation
- automatic or manual setting of the pressure switching interval (hysteresis)
- integrated relay for switching pumps on/off (except VNC 2 VARIO)
- selectable acoustic alert signals
Technical data
| Technical data | Unit |
VNC 2 |
| Vacuum sensor | | Integr. |
| Upper measuring limit | mbar/torr | 1100 / 825 |
| Lower measuring limit | mbar/torr | 1 / 1 |
| Measurement principle | | Ceramic diaphragm (alumina), capacitive, gas indep., absolute pressure |
| Measurement uncertainty | | < +- 1 mbar/hPa/torr / +- 1 digit (after adjustment, constant temp.) |
| Temperature coefficient | | < 0.07 mbar/hPa/0.05 torr /K |
| Ambient temperature range (operation) | °C | 10 - 40 |
| Ambient temperature range (storage) | °C | -10 - 60 |
| Max. media temp. for continuous operation / short times | °C | 40 / 80 |
| Material of outer housing | | Coated metal housing |
| Degree of protection | | IP 20 |
| Max. power for VACUU·BUS® (24V DC) | | 400 mA (line voltage: 110-230 V) / 340 mA (line voltage: 100-110 V) |
| Interface | | RS 232C |
| Dimensions (L x W x H) | mm | 163 x 90 x 68 |
| Weight | kg | 0.8 |
| ATEX-approval | | II 3G IIC T3 X Internal Atm. only |
| Items supplied | | Vacuum controller complete with integrated vacuum sensor, ready for use, with manual. |
| Accessories | | Rubber vacuum tubing DN 10 mm (686002) PTFE tubing DN 10/8 mm (638644) DAkkS calibration with first delivery (900216) DAkkS recalibration (900217) VACUU·BUS® accessories |
VNC 2 - Dimension sheet |
-Technical data are subject to change without notice-
Ordering data
| Product name | Mains voltage and frequency | Plug | Order no. |
| VNC 2 | 100-230 V~ 50-60 Hz
| IEC plug EN 60320 | 683070 |