Emerson 3051S Bedienungsanleitung PDF herunterladen (Seite 19)

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

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)

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