Yokogawa RotaMASS 3-Series - Manual (Page 174)

7. pArAMETEr dESCrIpTION
7-102 IM 01R04B04-00E-E 8th edition March 01, 2011 -00 All Rights Reserved. Copyright © 2003, Rota Yokogawa
7.22 Corrosion detection (detailed Setup)
7.23 detector data (detailed Setup)
The sensor model is defined in Parameter Detailed Setup / Sensor model :
The function Sensor model is only for changing a converter in case of maintenance.
Never change the sensor model if the sensor is not changed.
The sensor constants for the selected detector are stored in parameters Detailed Setup / Sensor constants.
You find the main sensor constants on the name plate. In case of doubt of the measured value please
confirm that the proper sensor constants are stored.
The serial number of the converter is stored in ´Detailed Setup / Device Information / Serial no. Converter´.
The serial number of the detector is stored in ´Detailed Setup / Device Information / Serial no. Detector´.
For compact version RCCT3 there is only one serial number.
The tag number, if provided by the customer (option /BG), is stored in Basic setup / Tag.
For integral type RCCT3x and remote type RCCF31 / RCCR31 combined ordered with RCCS3x the detector
data are factory stored in the concerning parameters. For not combined remote type RCCF31 with option
/NC see chapter 5.5.
If the parameter Detailed setup / Sensor model is changed to another type, the following parameters are
changed to new default values corresponding to the selected model :
Qnom, Mass flow unit, Mass flow LRV, Mass flow URV, Vol flow unit, Vol flow LRV,
Vol flow URV, Autozero range, Autozero fluctuation range and the sensor constants.
In this case the sensor constants, the detector serial number and, if available, the tag number must be set
to the values corresponding to the used detector as described above
.
WARNING
Corrosion detection
Not available if gas measurement
is ordered. Not working if a fixed
density value is set. This function
is useful if the maximum density
of the fluid is known and corrosion
may happen. As alternative to this
function the user can watch density
periodically.
Detection of corrosion in pipe.
After density value stored in Corrosion crit has been reached, alarm
output is activated if selected.
This function is only good for liquids with relative constant density.
Set an upper density level. If this density level is reached permanently,
a warning occurs.
Corrosion alm sel Select: Not apply, Apply
Corrosion crit Set density value up to density Urv or density lrv (whichever is
higher)
Corrosion damp Set damping on density for comparison with Corrosion crit, up to 10h.