Emerson 3051S - Manual (Page 19)

Quick Installation Guide
00825-0100-4801, Rev HA
February 2008
Rosemount 3051S
19
NOTES
1. Transmitter output is not safety-rated during the following:
configuration changes, multidrop, loop test. Alternative means should
be used to ensure process safety during transmitter configuration and
maintenance activities.
2. DCS or safety logic solver should be configured to match transmitter
configuration. Figure 9 identifies the three alarm levels available and
their operation values.
Figure 9. Alarm Levels
Rosemount Alarm Level
Namur Alarm Level
Custom Alarm Level (3)(4)
(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.
Normal Operation
4 mA 20 mA
20.8 mA
high saturation
21.75
(2)
3.9 mA
low saturation
3.75 mA
(1)
Normal Operation
4 mA 20 mA
20.5 mA
high saturation
22.5
(2)
3.8 mA
low saturation
3.6 mA
(1)
Normal Operation
4 mA 20 mA
20.1 - 20.5 mA
high saturation
20.2 - 23.0
(2)
3.7 - 3.9 mA
low saturation
3.6 - 3.8 mA
(1)
4801_QIG_RevHA.fm Page 19 Tuesday, February 26, 2008 12:17 PM