Emerson Rosemount 3144P - Operation and Maintenance

175
Reference Manual
00809-0100-4021, Rev JA
Certified Safety Instrumented System
April 2017
Certified Safety Instrumented System
Figure 6-1. Alarm Levels
Security switch
Position the security switch to the “ON” position to prevent accidental or deliberate change of
configuration data during normal operation. Be sure to take transmitter out of fixed current (loop test)
and simulation before setting security switch to “ON”. Alternatively, the Processor Reset function may be
used to restore normal operation while security switch is “ON”.
6.5 Operation and maintenance
6.5.1 Proof test
The following proof tests are recommended. In the event that an error is found in the safety
functionality, proof test results and corrective actions taken must be documented at
Emerson.com/Rosemount/Safety
.
All proof test procedures must be carried out by qualified personnel.
6.5.2 Partial proof test 1
The partial proof test 1 consists of a power cycle plus reasonability checks of the transmitter output.
Reference the FMEDA Report for percent of possible DU failures in the device.
FMEDA report can be found at Rosemount 3144P Temperature Transmitter
Product Page.
Required tools: Field Communicator, mA meter
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
20.5 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
21.5
(2)
3.8 mA
low saturation
3.6 mA
(1)
Normal Operation
4 mA
20 mA
20.5 - 22.9 mA
high saturation
20.6 - 23.0
(2)
3.6 - 3.9 mA
low saturation
3.5 - 3.8 mA
(1)