The ACG PID (VOC) sensor lamp and electrode stack should be cleaned as required (recommended every 3 months), The lamp should be replaced after approximately 5,000 hours of use (~6 months) and the cell should be replaced every 5 yearts or as required. The procedure for PID cell removal and fittment is detailed in the ACG+ user manual.
We also have created a instruction videos for these procedures, we hope you find these useful
If you have any questions or queries, please feel free to contact the Analox Technical Support Team