Yokogawa 2-Wire Dual Channel Transmitter/Analyzer FLXA21 - Manual (Page 98)

<7. COMMISSIONING OF SC (Conductivity)>
7-6
IM 12A01A02-01E 5th Edition : Oct. 31, 2013-00
l Concentration table
Concentration can be calculated by using the temperature compensation matrix or the additional
concentration table.
• By using the temperature compensation matrix
Set the “Additional table” to “Disabled”. The concentration can be obtained from the
temperature compensation matrix (based on the relation between the conductivity at the
reference temperature and the concentration).
Select Temp. compensation → Method, and then select Matrix. Next, choose a solution or
User defined 1 or 2 (see Section 7.1.4). The concentration cannot be obtained by any other
temperature compensation method (TC or NaCl).
• By using the additional concentration table
The additional concentration table indicates the relation between the conductivity and the
concentration at the reference temperature. Set the “Additional table” to “Enabled”. The
concentration can be obtained from the additional concentration table.
After entering values, select “Yes” for “Check values?”. Values are interpolated into empty
cells. If any mandatory cells are left blank, an error will be issued. An error message is also
issued if there is any error in the concentration table.
After completing entering values in the additional concentration table, set “Additional table”
to “Enabled”.
l Unit for table
Select the concentration display units from among %, ppt, ppm, and ppb.
Changing the unit will not result in a re-calculation of the table. Reenter values in the additional
concentration table.
7.1.7 Sensor diagnostic settings
This screen is used to set items relating to sensor diagnostics displayed on the screens invoked
by pressing .
Gauges are displayed for only parameters that have been enabled in “Sensor diag. settings.”
Parameters set to Disable are provided with a bar display.
The setting parameters include Progress time and Heat cycle. It is also possible to set the “Bad
limits” of the progress time and heat cycle and the “Heat cycle temp” and “Heat cycle time” of the
heat cycle.
7.2 Output setup
The general procedure is to first define the function of the output, Output or Simulate. Then, set
the process parameters associated with the output. On the Output, an output of measured value
is selected. On the Simulate, a simulation value can be set.
And, the parameters for HOLD function can be set on this setting.
l Output
The output signal is a current value specified by the following parameters.
Process parameter
Available process parameters depend on the selected “Measurement” item in Measurement
setup. Refer to Table 7.2.