Emerson Rosemount 5408, Справочное руководство

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Table 7-5: Status - Maintenance Required
(continued)
LCD display
message Host diagnostic
message Description Recommended actions
HIGH
ALERT High User Defined Alert The user defined variable is above
the defined limit. 1. Bring the system to a safe
state.
2. Verify that the process variable
is within specified limits.
3. Reconfirm the user defined
alarm limit.
4. If not needed, disable this
alert.
LOW
ALERT Low User Defined Alert The user defined variable is below
the defined limit. 1. Bring the system to a safe
state.
2. Verify that the process variable
is within specified limits.
3. Reconfirm the user defined
alarm limit.
4. If not needed, disable this
alert.
VAR
OUTRNG Linearized Variable Out
of Range The level measurement is outside
the configured range for volume or
scaled variable, or both.
Accuracy of volume/scaled variable
measurement may be degraded. 1. If volume strapping table is
used, make sure level values
within operating range are
included.
2. If scaled variable table is used,
make sure input variable values
within operating range are
included.
DC
DEGRAD Dielectric Constant
Estimation Degraded The dielectric constant estimation is
degraded.
Accuracy of level measurement may
be degraded. 1. Check configuration of Bottom
Product Dielectric Constant.
2. Check configuration of
Reference Height and Bottom
Offset.
3. If not needed, disable Tank
Bottom Projection.
7.3 Troubleshooting guides
If there is a malfunction despite the absence of alerts, follow the procedures described in
the appropriate troubleshooting guide. Under each of the symptoms, specific suggestions
for solving problems are offered.
Related information
Incorrect level readings
Troubleshooting the 4-20 mA/HART Output
Reference Manual Service and troubleshooting
00809-0100-4408 February 2020
Rosemount 5408 and 5408:SIS Level Transmitters 107