Rosemount 848T, Справочное руководство

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Reference Manual
00809-0100-4848, Rev AA
July 2009
2-5
Rosemount 848T Wireless
ADVANCED
CONFIGURATION
(OPTIONAL)
Configure Process Alerts
Alerts allow the user to set the transmitter to provide a notification when the
measurement readings exceed the specified temperature range. A high and
low alert may be established for each sensor input. A process alert is
transmitted if the trigger points are exceeded and alert mode is “on”. An alert
is displayed on a Field Communicator or on the AMS status screen, and will
reset when the value is once again within the user-configured range.
NOTE
The High Alert value must be set higher than the Low Alert value, and both
values must be within the temperature sensor limits.
1. From the
Home
screen, select 2:
Configure.
2. Select 1:
Guided Setup
.
3. Select 5:
Configure Alerts
, then follow the on-screen instructions to
complete the configuration process
.
The user configures the Trigger Point and Dead Band for each High and Low
alert and when the measurement value exceeds the Trigger Point it activates
the alert. The alert deactivates when the measurement value falls outside the
Dead Band range.
Example:
For the following illustration, the alert is active when the value rises above 100
° C or falls below 0 ° C. The alert turns off when the value falls below 95 ° C or
rises above 5 ° C. Dead Band is a buffer so the alerts do not toggle on and off
when the temperature measurement is close to the Trigger Point.
High Alert Configuration
Low Alert Configuration
Trigger Point = 100 ° C Trigger Point = 0 ° C
Dead Band = 5 ° C Dead Band = 5 ° C
Fast Key
2, 1, 5
High Alert On Low Alert On Trigger Point
Dead
100 ° C
5 ° C
Trigger Point
Dead Band
95 ° C
0 ° C
Band