9.6.2
High process noise parameters
The high process noise diagnostic has two read-only parameters. It does not have any
configurable parameters. This diagnostic requires that flow be present in the pipe and the
velocity be greater than1 ft/s (0.3 m/s).
5 Hz signal to noise ratio (SNR)
LOI menu path
Diagnostics > Variables > 5Hz SNR
This parameter shows the value of the signal to noise ratio at the coil drive frequency of 5
Hz. This is a read-only value. This number is a measure of the signal strength at 5 Hz
relative to the amount of process noise. If the transmitter is operating in 5 Hz mode, and
the signal to noise ratio remains below 25 for one minute, then the high process noise
diagnostic alert will activate.
37 Hz signal to noise ratio (SNR)
LOI menu path
Diagnostics > Variables > 37Hz SNR
This parameter shows the current value of the signal to noise ratio at the coil drive
frequency of 37 Hz. This is a read-only value. This number is a measure of the signal
strength at 37 Hz relative to the amount of process noise. If the transmitter is operating in
37 Hz mode, and the signal to noise ratio remains below 25 for one minute, then the high
process noise diagnostic alert will activate.
9.7
Coated electrode detection
The coated electrode detection diagnostic provides a means of monitoring insulating
coating buildup on the measurement electrodes. If coating is not detected, buildup over
time can lead to a compromised flow measurement. This diagnostic can detect if the
electrode is coated and if the amount of coating is affecting the flow measurement. There
are two levels of electrode coating.
•
Limit 1 indicates when coating is starting to occur, but has not compromised the
flow measurement.
•
Limit 2 indicates when coating is affecting the flow measurement and the meter
should be serviced immediately.
9.7.1
Turning coated electrode detection on/off
LOI menu path
Diagnostics > Diag Controls > Elec Coating
Advanced Diagnostics Configuration
Reference manual
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Summary of Contents for Rosemount 8732EM
Page 2: ......
Page 6: ...Contents iv Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Page 10: ...Safety messages 4 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Page 14: ...Introduction 8 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Page 30: ...Sensor Installation 24 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Page 92: ...Operation 86 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Page 158: ...Maintenance 152 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Page 214: ...Product Certifications 208 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Page 217: ...Wiring 8732EM using combination cable Figure C 2 Wiring Diagrams Reference manual 211 ...
Page 222: ...Wiring Diagrams 216 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Page 253: ...Implementing a Universal Transmitter Reference manual 247 ...