Teledyne PEM-9004 - Portable emissions analyzer - Manual (Page 55)

Portable Emissions Analyzer Operation
Teledyne Analytical Instruments 43
10-Line Layout
5-Line Layout
4.5.1.13 CO P ROTECT
The PEM-9004 is equipped with a second pump (CO-flushing-
pump) in order to protect the sensitive CO-sensors from CO-overload.
The CO-flushing-pump switches on automatically when necessary,
i.e. when the admitted CO-range is exceeded or it can be switched on
manually using the CO Protect button.
When the CO Protect button is pressed the CO pump will start.
Pressing CO Protect button again will turn the pump off as long as the