MKS Mass-Flo 2179A - How To Adjust the Controller Gain (MFC only)

Chapter Four: Operation How To Ad
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ust the Controller Gain (MFC onl
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How To Adjust the Controller Gain (MFC only)
Adjust the controller gain if the flow signal oscillates. Reducing the controller gain will reduce
the signal oscillation. The controller gain adjustment pot is located on the upstream side of the
controller.
•
To decrease flow signal oscillation:
Turn the controller gain counter-clockwise to
decrease the controller gain setting.
Note
Lowering the supply pressure to the MFC will have the same effect as
decreasing the gain since it will reduce the overflow/underflow effect of
the valve.
If the MFC responds too slowly to a change in set point, you may need to increase the controller
gain slightly. To increase the controller gain, turn the controller gain pot clockwise.