Brooks Instrument SLAMf Series - Manual (Page 44)

3-10
Section 3 Operation Installation and Operation Manual
X-TMF-SLAMf-MFC-eng
Part Number: 541B032AAG
April, 2013
Brooks ® Digital MFC's and MFM's
Safe Mode
When the Device is in Safe Mode, the following behavioral characteristics
of the device apply:
Flow Output Signal will be set to its defined Safe State for the following
output signal types:
0 to 5 Vdc: 0 Vdc
1 to 5 Vdc: 1 Vdc
0 to 20 mA: 0 mA
4 to 20 mA: 0 mA
In the Safe State, the valve will be unpowered. This means that for
Normally Closed valves, the valve will stay closed and for Normally Open
valves, the valve will stay open.
3-6-3 General Alarms and Warnings (Analog versions only)
Several alarms are available to indicate unexpected process control events
as follows:
Flow Alarms
Two flow alarms will be provided. Each will allow the user to set a minimum
and maximum flow limit range. Whenever flow is not within the range, the
alarm will occur. These two general flow alarms provide more flexibility
than having specific low and high flow alarms. These two alarms may be
used to create separate low and high flow alarms, or maybe used to
provide banding around a flowrate. If the device is a controller, then this
alarm is disabled if the setpoint is not within the specified flow limits or if
the valve override is active.