61
Reference Manual
00809-0100-4001, Rev JA
Section 3: Configuration
November 2012
3.11
Detailed setup
3.11.1
Failure mode alarm and saturation
The 3051 transmitters automatically and continuously perform self-diagnostic routines. If the
self-diagnostic routines detect a failure, the transmitter drives its output outside of the normal
saturation values. The transmitter will drive its output low or high based on the position of the
failure mode alarm jumper. See
,
saturation output levels. To select alarm position, see
“Configure security and alarm” on
.
Table 3-3. 4-20 mA HART alarm and saturation values
Table 3-4. NAMUR-Compliant alarm and saturation values
Table 3-5. 1-5 Vdc HART low-power alarm and saturation values
Caution
Alarm level values will be affected by analog trim. Refer to
“Analog output trim” on page 77
Note
When a transmitter is in an alarm condition, the Field Communicator indicates the analog
output the transmitter would drive if the alarm condition did not exist. The transmitter will
alarm high in the event of failure if the alarm jumper is removed.
Level
4–20 mA saturation
4–20 mA alarm
Low
3.9 mA
3.75 mA
High
20.8 mA
21.75 mA
Level
4–20 mA saturation
4–20 mA alarm
Low
3.8 mA
3.6 mA
High
20.5 mA
22.5 mA
Level
1–5 V saturation
1–5 V alarm
Low
0.97 V
0.95 V
High
5.20 V
5.4 V
Содержание Rosemount 3051
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