Endress+Hauser Proline Prowirl F 200, Operating Instructions Manual

Page: 174 / 224

Diagnostics and troubleshooting Proline Prowirl F 200 PROFIBUS PA
174 Hauser
Diagnostic information Remedy instructions Influenced measured
variables
No. Short text
972 Degrees of superheat limit excceeded 1. Controll process conditions
2. Install pressure transmitter or enter
correct fixed pressure value
• Calculated saturated
steam pressure
• Density
• Energy flow
• Heat flow difference
• Low flow cut off
• Mass flow
• Total mass flow
• Switch output status
• Reynolds number
• Corrected volume flow
• Steam quality
Measured variable status [from the factory]
1)
Quality Uncertain
Quality substatus Process related
Coding (hex) 0x78 to 0x7B
Status signal S
Diagnostic behavior Warning
1) Diagnostic behavior can be changed. This causes the overall status of the measured variable to change.
12.5.5 Operating conditions for displaying the following diagnostics
information
Operating conditions for displaying the following diagnostics information:
• Diagnostic message 871 Near steam saturation limit : The process temperature is
less than 2K from the saturated steam line.
• Diagnostics information 872: The measured steam quality has dropped below the
configured limit value for the steam quality (limit value: Expert → System
→ Diagnostic handling → Diagnostic limits → Steam quality limit).
• Diagnostics information 873: The process temperature is ≤ 0 °C.
• Diagnostics information 874: Wet steam detection/measurement is outside the
specified limits for the following process parameters: pressure, temperature,
velocity.
– Pressure: 0.5 to 100 bar
– Temperature: +81.3 to +320 °C (+178.3 to +608 °F)
– Velocity: Depends on the measuring tube and is configured via EhDS.
• Diagnostics information 972: The degree of superheat has exceeded the configured
limit value (limit value: Expert → System → Diagnostic handling → Diagnostic limits
→ Degrees of superheat limit).
12.5.6 Emergency mode in event of temperature compensation
‣
Change temperature measurement: PT1+PT2 to the PT1 option, PT2 option or the Off
option.
 If the
Off option is selected, the measuring device calculates by using the fixed
process pressure.
12.6 Pending diagnostic events
The Diagnostics menu allows the user to view the current diagnostic event and the
previous diagnostic event separately.
To call up the measures to rectify a diagnostic event:
• Via local display →  144
• Via "FieldCare" operating tool →  146
• Via "DeviceCare" operating tool →  146
Other pending diagnostic events can be displayed in the
Diagnostic list submenu
→  175