![HART Proline Promag 55 Скачать руководство пользователя страница 130](http://html1.mh-extra.com/html/hart/proline-promag-55/proline-promag-55_manual_601405130.webp)
10 Block SPECIAL FUNCTION
Device Functions Proline Promag 55
130
Hauser
Activating coating detection (procedure)
1.
Ascertain reference values for the diagnostic parameters
→
Function REFERENCE
CONDITION USER (7501).
2.
Select reference condition
→
Function SELECT REFERENCE CONDITION (7502)
3.
Specify when and how the diagnostic parameter values are to be ascertained:
– Time intervals
→
Function ACQUISITION PERIOD (7511)
– Periodical or manual
→
Function ACQUISITION MODE (7510)
4.
Switch on coating detection
→
Function DETECTION COATING (7520)
5.
Activate warning mode (if desired):
!
Note!
Activating the WARNING MODE (7503) function normally only makes sense if a trend
analysis of the diagnostic parameter values in question has been performed beforehand! Only
then, can process-specific limit values be entered (= max. permitted deviation from the
reference status).
– Switch on warning mode
→
Function WARNING MODE (7503)
– Enter the maximum permitted deviation of the decay time constant from the reference
condition
→
Function WARNING (7536, 7546)
Trend analysis of diagnostic parameters
By evaluating a sufficiently large number of measuring values, useful trend information can be
acquired that provides information about possible coating formations or damage to the measuring
electrodes - for example, as a result of corrosion or mechanical influences.
The following values of diagnostic parameters can be called up via the function matrix:
• Reference values
• Actual values of the decay time constant or of the electrode potential
• Minimum/maximum values since the last adjustment
• Data history of the last 10 measuring values (or 100 values when interrogating via the "FieldCare"
software)
• Actual deviation between diagnostic parameter value and reference value
To assess possible build-up, the diagnostic parameters of the COATING 1 and COATING 2 function
groups should only be interpreted and assessed in combination with those of ELECTRODE
POTENTIAL 1/2 and VOLUME FLOW parameters. As build-up typically develops over a period of
months, it is useful to present and analyze the relevant measured data and parameters using
appropriate software, for example, the Hauser software packages "FieldCare".
"
Caution!
Since the decay time and the electrode potential are dependent on the process conditions at the
electrode and, therefore, on the fluid, a new reference measurement is required as the starting point
for a trend analysis for each process and each fluid in a balanced state. The measuring values are
then measured periodically and saved in the device storage unit (RAM).
!
Note!
More information about "trend analysis" can be found in the Operating Instructions for this
measuring device.
Содержание Proline Promag 55
Страница 2: ...Device Functions Proline Promag 55 2 Endress Hauser ...
Страница 5: ...Device Functions Proline Promag 55 Contents Endress Hauser 5 ...
Страница 164: ...14 Index Device Functions Proline Promag 55 164 Endress Hauser ...
Страница 166: ...www endress com worldwide BA120D 06 en 10 09 71104957 FM SGML6 0 ...