Installation and Operation
AMI
Analyzer Manual
19
Flow Control
Figure 6 Front panel controls
3 way Selector Valve
– Located right beneath the cell cap on the lower right side of the front panel of
the NEMA 4 enclosure. It selects either sample or span gas to flow past the sensor. It can be turned off, to
prevent gas from flowing past the sensor, useful when replacing the sensor. Rotate the valve until the
groove in one side of the valve corresponds with the position marking, and the detent clicks into place.
Flow Control valve
– Located in the center of the 3 way selector valve. This provides flow control of
the sample or span gas flowing past the sensor as indicated in the flowmeter.
Flow meter
– Shows the sample or span flow rate in the range of 0 to 2 SCFH. The flow should generally
be set at 1 SCFH.