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Installation and Operation Manual
X-TMF-SLA5800-MFC-eng
Part Number: 541B027AAG
April, 2013
3-8 Special Features
3-8-1 Setpoint Ramping
3-8-2 Low Setpoint Command Cutoff
3-8-3 Low Flow Output Cutoff
3-8-4 Flow Output Damping
3-8-5 Adaptive Control
3-8-6 Flow Totalizer
3-8-7 Flow Output Conditioning
Special Features may be adjusted by an advanced user via the Service
Port using a special software application available from Brooks. Reference
the Brooks Service Suite User Manual for more information about the
Service Port and Service Tool software applications.
The following Setpoint Ramping Options are provided:
Off – The device responds immediately to Setpoint changes.
Time – The device will Ramp Flow from the old Setpoint to the new
Setpoint in the time specified by the user in seconds.
When the Setpoint is derived from analog input, the Low Setpoint
Command Cutoff parameter sets the minimum valid value of Setpoint. If
the Setpoint value reported by the analog input is below the Low Setpoint
Command Cutoff parameter value, then the Setpoint will be set to zero.
Whenever the measured flow is below the Low Flow Output Cutoff
parameter, the Flow Output will be set to zero.
The Flow Output can be damped from 0 to 10 seconds.
Adaptive Valve Control is a means of dynamically adjusting valve offset
and span in response to changing process conditions. Options for Adaptive
Control are: On/Off, Adjust Offset Only, Adjust Offset and Span.
A Flow Totalizer will be provided and maintained in Non-Volatile Memory.
The update rate of the totalizer in Non-Volatile Memory will be 5 seconds.
When this feature is enabled and a change in setpoint is detected, the
Flow Out signal will equal setpoint for a configurable time period. At the
end of the time period, the Flow Out signal will indicate actual flow. A
change of setpoint is defined as a change of more than 1% of full scale.
Section 3 Operation
®
Brooks
Digital MFC's & MFM's
3-13
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