Emerson Rosemount 2090, Дополнение к руководству

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2
Manual Supplement
00809-0200-4108, Rev AB
Rosemount 2090 Pressure Transmitter
December 2018
Rosemount 2090 Pressure Transmitter
Position the security switch to the ( ) position to prevent accidental or deliberate change of
configuration data during normal operation.
1.3 Configuring in SIS applications
Use any HART capable configuration tool to communicate with and verify configuration of the
Rosemount 2090.
Note
Transmitter output is not safety-rated during the following: configuration changes, multidrop, and loop
test. Alternative means should be used to ensure process safety during transmitter configuration and
maintenance activities.
1.4 Damping
User-selected damping will affect the transmitters ability to respond to changes in the applied process.
The
damping value + response time must not exceed the loop requirements. See the Reference Manual .
1.5 Alarm and saturation levels
DCS or safety logic solver should be configured to match transmitter configuration. Figure 1-1 identifies
the three alarm levels available and their operation values.
Figure 1-1. Alarm levels
1. Transmitter Failure, hardware or software alarm in LO position.
2. Transmitter Failure, hardware of software alarm in HI position.
Rosemount alarm level
Normal Operation
3.75 mA
(1)
4 mA 20 mA 21.75
(2)
3.9 mA
low saturation
20.8 mA
high saturation
Namur alarm level
Normal Operation
3.6 mA
(1)
4 mA 20 mA 22.5
(2)
3.8 mA
low saturation
20.5
high saturation
Custom alarm level
Normal Operation
3.6 - 3.8 mA
(1)
4 mA 20 mA 20.2 - 23.0
(2)
3.7 - 3.9 mA
low saturation
20.1 - 22.9 mA
high saturation