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March 2013
22
Quick Installation Guide
Damping
User adjusted damping affects the transmitter’s ability to respond to process
changes. Therefore, the damping values + response time should not exceed the
Safety loop requirements.
Alarm and saturation levels
DCS or safety logic solver should be configured to handle both High alarm and
Low alarm.
Ta bl e 3 identifies the alarm levels available and their operation values.
1
It is assumed that the current output signal is fed to a Safety Integrity Level 2
(SIL2) -compliant analog input board of a safety logic solver. For instructions on
alarm level settings, see the Rosemount 5300 Series Reference Manual
(Document No. 00809-0100-4530), “Analog Output (HART)” section.
NOTE:
Only the High or Low Alarm Mode can be used for the Safety Function. Do not choose Freeze
Current as an error will not be announced in the current loop.
Write protection
A Rosemount 5300 transmitter can be protected from unintentional
configuration changes by a password protected function. It is recommended to
use write protection described in the Rosemount 5300 Series Reference Manual
(Document No. 00809-0100-4530), “Write Protecting a Transmitter” section.
1) In certain cases, the transmitter does not go into the user defined alarm state. For example, in case of a short circuit,
the transmitter goes into High Alarm state even if Low Alarm has been configured.
Table 3. Alarm levels and operation values
Rosemount Alarm Level
Normal Operation
3.75 mA
1
1. Transmitter Failure, hardware or software alarm in Low position.
4 mA 21.75 mA
2
3.9 mA
low saturation
20.8 mA
high saturation
Namur Alarm Level
Normal Operation
3.6 mA
1
4 mA 22.5 mA
2
3.8 mA
low saturation
20.5 mA
high saturation
2. Transmitter Failure, hardware or software alarm in High position.
20 mA
20 mA