Brooks Instrument 5850E - Manual (Page 31)

Brooks ® Model 5850E
3-11
Section 3 Operation Installation and Operation Manual
X-TMF-5850E-MFC-eng
Part Number: 541B102AHG
September, 2009
Figure 3-7 Fast Response Adjustment
a storage oscilloscope or recorder.
a. Make a step change in command to the controller from zero to 100% of
full scale flow and record the output signal of the fast response flowme-
ter.
b. If this signal shows more than 4% overshoot, adjust the anticipate
potentiometer one-half to one turn counterclockwise. If the signal does
not show overshoot, but is not within 2% full scale of final value after
three seconds (six seconds for Current I/O Version), adjust the antici-
pate potentiometer one-half to one turn clockwise. Set the command
potentiometer for zero percent of flow.
c. Repeat Steps “a” and “b” until the fast response flowmeter output signal
meets the specified response requirements.
Note: With the above equipment, the anticipate potentiometer can be
adjusted to give optimum response characteristics for any process.