Emerson Rosemount 3051S, Quick Installation Guide, Rosemount Alarm Level, Namur Alarm Level

Quick Installation Guide

00825-0100-4801, Rev HA February 2008

Rosemount 3051S

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

Normal Operation

3.75 mA(1)	4 mA	20 mA	21.75(2)
	3.9 mA		20.8 mA
	low saturation		high saturation

Namur Alarm Level

Normal Operation

3.6 mA(1)	4 mA	20 mA	22.5(2)
3.8 mA			20.5 mA
low saturation			high saturation

Custom Alarm Level(3)(4)

Normal Operation

3.6 - 3.8 mA(1) 4 mA 20 mA

3.7- 3.9 mA low saturation

20.2 - 23.0(2)

20.1- 20.5 mA high 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.

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