Safety Function; Environmental Limits; Application Limits; Design Verification - Emerson Rosemount 2130 Functional Safety Manual

Manual Supplement
00809-0500-4130, Rev AG
Section 3
3.1

Safety function

A change in liquid level through the switch point of the Rosemount 2130 level switch causes it to
operate. It may be used in high level or low level safety related applications. It is important that the
2130 is user-configured for the correct application.
3.2

Environmental limits

The designer of the SIF (Safety Instrumented Function) must check that the Rosemount 2130 level
switch is rated for use within the expected environmental limits. See the Rosemount 2130 product
data sheet for environmental limits.
Note
For all product information and documentation downloads, see the on-line
Rosemount 2130 web page at www.rosemount.com.
3.3

Application limits

It is very important that the SIF designer checks for material compatibility by considering process
liquids and on-site chemical contaminants. If the Rosemount 2130 level switch is used outside the
application limits or with incompatible materials, the reliability data and predicted SIL capability
becomes invalid.
The construction materials of a Rosemount 2130 level switch are specified in the product data sheet
and the product reference manual (see
label, and the ordering information table and specification in these product documents to find out
the construction materials.
3.4

Design verification

A detailed Failure Modes, Effects and Diagnostics Analysis (FMEDA) report for the Rosemount 2130
is available from Emerson Process Management. This report details all failure rates and failure modes
as well as expected lifetime.
Note
The FMEDA report is available from the Safety quick link at www.rosemount.com. Select Product
List, then Level tab, and finally select 2130. In the right-hand panel, there are SIL documents
including the FMEDA report (and this safety manual).
The achieved Safety Integrity Level (SIL) of an entire Safety Instrumented Function (SIF) design must
be verified by the designer using a PFDAVG calculation considering the architecture, proof test
interval, proof test effectiveness, any automatic diagnostics, average repair time, and the specific
failures rates of all equipment included in the SIF.
Designing a Safety Function using the Rosemount 2130

Section 3: Designing a Safety Function using the Rosemount 2130

Designing a Safety Function
using the Rosemount 2130
Table 1-1 on page 3). Use the model code on the product
March 2015
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