3-9
Brooks
®
Digital MFC's & MFM's
Section 3 Operation
Installation and Operation Manual
X-TMF-SLA5800-Series-RevB-MFC-eng
Part Number: 541B187AAG
January, 2017
3-6-3
General Alarms (Analog versions only)
Several alarms are available to indicate unexpected process control events
as follows:
Flow Alarms
Two flow alarms are provided. Each allows 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 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.
No Flow Indication Alarm
The No Flow Indication Alarm will occur when the measurement of flow
indicates flow less than a value that can be configured to 0 - 2%. If the
device is a controller, setpoint must exceed the configured limit and valve
override must not be active for this alarm to occur.
Setpoint Deviation Alarm
The Setpoint Deviation Alarm monitors the difference between Setpoint
and Flow and sets the alarm when the difference exceeds the specified
limits for more than the specified delay period. The user specifies a
minimum and maximum limit in percent of Setpoint. This alarm is disabled
if the valve override is active.
Temperature Out of Limits
The Temperature Out of Limits alarm will occur when the internal
temperature is below the low limit or above the high limit.
Totalizer Overflow Alarm
The Totalizer Overflow Alarm will occur when the Flow Totalizer reaches its
maximum value and resets to zero. This alarm is permanently configured
as a latching type alarm which requires the user to reset the alarm via the
Service Port or the RS485 interface.
Diagnostic
Failure Description
RAM Test Failure
Byte by byte test of RAM detects bad
memory location
Program Memory Corrupt
Checksum failure
Non-Volatile Memory
Byte by byte test of Non-Volatile Memory;
detects bad memory location
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Diagnostic Alarms (Analog versions only)
A Diagnostic Alarm will be indicated when any of the diagnostics below
detect a failure providing a visual indication via the red LED. The
diagnostic test or tests that have detected a problem and caused the
Diagnostic Alarm to occur can be determined only by reading alarm status
via the Diagnostics Port.
