Emerson Rosemount 148 Reference Manual page 29

Reference Manual
00809-0100-4148
Figure 3-1: Change in Input vs. Change in Output with Damping Set to Five Seconds
Alarm and saturation
Alarm direction, low alarm level, high alarm level, low saturation, and high saturation
values can be set here. Rosemount and NAMUR standard values can be found on
mode
• Low alarm value must be between 3.50 and 3.75 mA
• High alarm value must be between 21.0 and 23.0 mA
• Low saturation level must be between the low alarm value plus 0.1 mA and 3.9 mA.
Example: The low alarm value has been set to 3.7 mA, so the low saturation level (S)
must be 3.8–3.9 mA.
• The high saturation level must be between 20.5 mA and the high alarm value minus 0.1
mA. Example: The highalarm value has been set to 20.8 mA, so the low saturation level
(S) must be 20.5–20.7 mA.
See Failure mode
50/60 Hz selection
The 50/60 Hz selection sets the transmitter electronic filter to reject the frequency of the
AC power supply in the plant.
Write protect
Write protect safeguards the transmitter configuration data from accidental or
unwarranted changes.
3.3.5 Information
The transmitter Information tab can be selected from the main start up screen, and lists
the transmitter information variables that can be viewed. The Refresh button must be
clicked to update the view of the current state of the transmitter.
or user-configured values may be entered. The guidelines are as follows:
considerations.
Configuration
June 2019
Failure
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