Can / should the SCM be switched off when the plant is not running?
Yes. It will last longer if turned off when not in use, the electronics can warm up in a few seconds, while the time for a reading to full accuracy is 5-15 minutes after any significant process change. It can also run continuously without problem, however if the flow rate through the sample chamber falls to zero there is a elevated risk of damage to the piston and sensor from particles and heating. The sensor and piston should be cleaned prior to being allowed to dry.
