Commissioning; Damping; Alarm And Saturation Levels - Emerson Rosemount 3051S Series Reference Manual

Reference Manual
00809-0100-4801, Rev FA
October 2010

COMMISSIONING

Damping

Alarm and Saturation
Levels
Figure 6-1. Alarm Levels
To commission the 3051S Safety Certified Transmitter, use the HART "Menu
Tree" on page 3-5 and "Fast Key Sequence" on page 3-6.
NOTE
Transmitter output is not safety-rated during the following: configuration
changes, multidrop, and loop test. Alternative means should be used to
ensure process safety during transmitter configuration and maintenance
activities.
For more information on the 375 Field Communicator see document
00809-0100-4276. AMS help can be found in the AMS on-line guides within
the AMS system.
User-selected damping will affect the transmitters ability to respond to
changes in the applied process. The damping value + response time should
not exceed the loop requirements.
Fast Key Sequence - 1, 3, 6
DCS or safety logic solver should be configured to match transmitter
configuration. Figure 6-1 identifies the three alarm levels available and their
operation values.
(1)
3.75 mA
3.9 mA
low saturation
(1)
3.6 mA
3.8 mA
low saturation
(1)
3.6 - 3.8 mA
3.7 - 3.9 mA
low saturation
(1) Transmitter Failure, hardware or software alarm in LO position.
(2) Transmitter Failure, hardware or software alarm in HI position.
(3) High alarm must be at least 0.1 mA higher than the high saturation value.
(4) Low alarm must be at least 0.1 mA lower than the low saturation value.
Setting the alarm values and direction varies whether the hardware switch
option is installed. You can use a HART master or communicator to set the
Alarm and Saturation values.
Rosemount 3051S Series
Rosemount Alarm Level
Normal Operation
4 mA 20 mA
Namur Alarm Level
Normal Operation
20 mA
4 mA
(3)(4)
Custom Alarm Level
Normal Operation
20 mA
4 mA
(2)
21.75
20.8 mA
high saturation
(2)
22.5
20.5 mA
high saturation
(2)
20.2 - 23.0
20.1 - 21.5 mA
high saturation
6-3