IM 12D08N05-01E
4-4
<4. OPERATION>
The analyzer checks the rate of polarization every 24 hours. If a clear increase of
polarization is observed, the user is notified when a next calibration should take place.
Prior to calibration the sensor should be well cleaned and rinsed.
4.3.13 HART ID
A part of the HART device ID (descriptor)
4.3.14 Software revision
The revision level of the software in the instrument
TROUBLE SHOOTING
If you contact the local sales/ service organization the serial number and software revision
is necessary information. Without that information it is impossible to help you. It is also very
useful to report all the information that you find on the zoom-in display.
4.3.15 HART Device revision
Sometimes the firmware of a device is updated in a way that the communication file (HART
DD) need revision too. In this case the revision level is increased by one. The revision
level of the HART DD must match the revision level of the Firmware. The revision level is
expressed by the first two characters of the filename.
The following files should be used when the HART Device revision level is 2.
(0201.aot, 0201.fms, 0201.imp, 0201.sym)
4.3.16 Logbook
The SC450G contains several logbooks to store history information on events, changed
settings and calibrations. The logbooks have been categorized to simplify the retrieval of
this information.
Calibration will give information of previous calibrations. This logbook is useful as one now
can
1) Monitor the sensor performance over time.
2) Monitor the sensor(s) lifetime.
Sensor will give all history information on parameter settings concerning the sensor(s).
The events logged in this logbook are user definable. This is done in:
Commissioning >> Configure Logbook >> Sensor Logbook.
Predictive maintenance. If the sensor diagnostics of the SC450G are enabled, the
diagnostics are saved into this logbook.
For the SC450G, the reference impedance (measured between the Liquid earth and the
reference electrode) is stored every hour.
This information can be used for (predictive) maintenance schedules as the impedance is
a measure of fouling and the sensor should be kept clean for best results.
