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Manual
MS-00809-0100-3625
5
Troubleshooting
5.1
HART
5.1.1
Status flags
The following sections are the status flags for the Rosemount 625IR. Not all status flags will
impact the 0-20 mA safety output. The operator can access all statuses through HART
FAULT
WARNING
SERVICE
HART
The following sections describe the gas detector status flags that may be displayed on
the HART interface. Not all of the status flags will have any impact on the 0-20 mA safety
output. All statuses are available through the HART interface or the independent Modbus
digital output.
Related information
Analog safety output
Beam blocked
Status type
Failure
Potential cause
The optical signal is attenuated by more than 70 percent. The detector cannot measure
gas, probably due to dirt or something else blocking the optics.
Recommended actions
Early clean optics
Status type
Maintenance Request
Potential cause
The optical signal is attenuated by more than 55 percent, probably due to dirt on the
optics. The detector still works and detects gas within accuracy, but you should plan to
clean the lens and mirror.
Rosemount 625IR
status flags
®
The 0-20 mA output goes into
The detector is still inside specification, but the operator or vendor might be
interested in this information.
mA output. For example,
maintenance.
The detector is in
SERVICE
status flags
®
1. Perform service by removing weather protection and cleaning optics.
2. Inspect weather protection to verify that it doesn't contain any objects blocking
the optical path.
mode.
FAULT
flags may or may not impact the 0-20
WARNING
EARLY CLEAN OPTICS
mode and might not measure gas.
Troubleshooting
January 2024
®
is very useful for planning
.
®
39
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