Alarm And Saturation Levels - Emerson Rosemount 3051S ERS Reference Manual

Reference Manual
00809-0100-4804, Rev CB
Figure 3-1. Zero and Span Buttons
A
A. Zero
B. Span
3.4.6

Alarm and saturation levels

Fast Keys
The Rosemount 3051S ERS Transmitter automatically and continuously performs self-diagnostic
routines. If a self-diagnostic routine detects a failure, the ERS System will drive the output to the
configured alarm value that is based on the position of the failure mode alarm switch (see
process alerts" on page
the applied pressure goes outside the 4–20 mA range values.
The Rosemount 3051S ERS System has three options for configuring the failure mode alarm and
saturation levels:
Note
The ERS System will drive the output to alarm level (high or low) if the pressure applied to either sensor is
outside of the Lower sensor limit (LSL) or Upper sensor limit (USL).
Table 3-2. Alarm and Saturation Values
Switch position
Switch position
Switch position
Additional considerations when using custom alarm and saturation values:
Low alarm must be less than low saturation

High alarm must be higher than high saturation

Alarm and saturation levels must be separated by at least 0.1 mA.

Configuration
B
2, 1, 1, 5
38). The ERS System will also drive the output to configured saturation values if
Rosemount (standard)
Saturation level
Low 3.9 mA
High 20.8 mA
NAMUR-compliant
Saturation level
Low 3.8 mA
High 20.5 mA
Saturation level
Low 3.7 — 3.9 mA
High 20.1 — 21.5 mA
Alarm level
 21.75 mA
Alarm level
Custom
Alarm level
3.54 — 3.8 mA
20.2 — 23.0 mA
 3.75 mA
 3.6 mA
 22.5 mA
Configuration
November 2016
"Configure
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