Site Acceptance; Proof-Testing; Overview - Emerson Rosemount 5408 Reference Manual

Safety Instrumented Systems (4-20 mA only)
Figure 8-3:
3.75 mA
1.
2.
8.7

Site acceptance

After installation and/or configuration, proper operation of the transmitter (including
verification of all configuration changes) must be verified. A site acceptance test is
therefore recommended. The proof-tests outlined in section
this.
8.8

Proof-testing

8.8.1

Overview

The Rosemount 5408:SIS Level Transmitter must be tested at regular intervals to reveal
faults which are undetected by automatic diagnostics. It is the user's responsibility to
choose the type of testing and the frequency of these tests.
Results from periodic proof-tests shall be recorded and periodically reviewed. If an error is
found in the safety functionality, the transmitter shall be put out of operation and the
process shall be kept in a safe state by other measures.
Note
For a valid result, always perform the proof-test on the product that will be stored in the tank while
the device is in operation.
138
Alarm Levels and Operation Values
Rosemount Alarm Level
(1)
4 mA
3.9 mA
low saturation
(1)
3.6 mA 4 mA
3.8 mA
low saturation
Transmitter Failure, hardware or software alarm in Low position.
Transmitter Failure, hardware or software alarm in High position.
Normal Operation
20 mA
20.8 mA
high saturation
Namur Alarm Level
Normal Operation
20 mA
20.5 mA
high saturation
(2)
21.75 mA
(2)
22.5 mA
Section 8.8 can be used for
Reference Manual