Oxygen monitoring systems are used widely in exhaust monitoring in the glass industries. The instrument is not required to perform a control function, but is used to interpret the information from the oxygen probe and to handle the probe cleaning function. The oxygen probe connects directly to the process inputs of the instrument. The instrument then performs the linearisation of the probe signals to determine the amount of oxygen in the atmosphere. A typical oxygen monitoring system schematic is shown in Figure 1.
Commissioning the oxygen monitor is straigt forward, since no control configuration is required. The oxygen level may be configured to read percentage, log of concentration or parts per million. Once configured, the probe diagnostic page available in Level 1 displays the oxygen level, the probe mV signal and the probe temperature. This is illustrated in figure 1.
The oxygen level may be used to optimise the combustion process.
