Section 3 Operation
Special Features
Special Features may be adjusted by an advanced user via the Diagnostics
Port using a special software application available from Brooks. Reference the
Brooks Expert Support Tool User Manual (BEST) for more information about
the Diagnostic Port and software application.
Setpoint Ramping
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 % per second.
Low Setpoint Command Cutoff
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.
Low Flow Output Cutoff
Whenever the measured flow is below the Low Flow Output Cutoff parameter,
the Flow Output will be set to zero.
Adaptive Control
Adaptive Valve Control is a means of dynamically adjusting valve offset and
span in response to changing process conditions. Options for Adaptive Con-
trol are: On/Off, Adjust Offset Only, Adjust Offset and Span.
External Voltage
dmRtAuxiliaryInput value with
Page
(-0.5 to 11 V)
dmRtAuxiliaryAdSelect = 10 V
.1 to .99 V
.01 to .099
1
1 V to 1.99 V
.1 to .199
2
2 V to 2.99 V
.2 to .299
3
3 V to 3.99 V
.3 to .399
4
4 V to 4.49 V
.4 to .449
5
4.5 V to 5 V
0.45 to 0.5
6
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