Special safety in gas supply
Additionally, a redundant analysis system with double analysis, i.e. with two independent measuring cells, is installed. Two NDIR sensors continuously determine the CO2 concentration in the Ar/CO2 gas mixture. Each measuring cell is responsible for one gas mixer, thus an independent redundancy is ensured. The analysis results are displayed on the color display, integrated in the control unit. The gas analysis is monitored by means of solenoid valves with the measuring gas of the corresponding gas mixers and also has an automatic zero point and end point calibration.
During the switchover, the circumstance of a fault or of the automatic calibration is taken into account with priority circuit.
Switchover and gas analysis are controlled via a common PLC with touchscreen display. The display shows the operating state of the gas mixer one or two. For a quick overview, two indicators also show the currently activated gas mixer.
Messages such as
- Operating condition Mixer 1/2
- Failure mixer 1/2
- Limit values
- Analysis actual value mixer 1 and 2 of the continuous measurement as analog signal
are transmitted to the central control room via a cable connection.
When switching over, the circumstance of a fault or automatic calibration with priority circuit is taken into account.
The analysis values are logged in the controller and can be read out as a CSV file via a USB slot on the front of the housing and processed with common software tools.
Design according to your requirements
This ensures the necessary special safety in mixed gas supply and continuous gas mixture analysis to meet the highest quality requirements.