Yokogawa 2-Wire Dual Channel Transmitter/Analyzer FLXA21 - Manual (Page 119)

<9. OPERATION OF ISC (Induvtive Conductivity)>
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IM 12A01A02-01E 5th Edition : Oct. 31, 2013-00
n c.c. (factory)
This parameter displays the cell constant (factory setting).
The cell constant (factory setting) is determined by factory calibration made during sensor
manufacturing. This value can be set in Commissioning → Measurement setup → Sensor setup.
The cell constant is indicated on the sensor or cable label.
n c.c. (adjusted)
This parameter displays the cell constant (adjusted).
The cell constant (adjusted) is a cell constant that has been calibrated and is set by calibration
action.
When the system’s cell constant is adjusted on-line by calibration using a process solution or
buffer solution, a new cell constant is logged here. The difference between this value and the
default value set at factory shipment will not be large. If there is a large difference between them,
check whether the sensor is broken or contaminated.
n Temp. comp. 1
This parameter shows the temperature compensation method for 1st measurement. The setting
is made in Commissioning → Measurement setup → Temp. comp.
n Temp. comp. 2
This parameter shows the temperature compensation method for 2nd measurement. The setting
is made in Commissioning → Measurement setup → Temp. comp.
2nd measurement does not imply that two measurements can be made individually, but it means
that two types of compensation methods can be configured, which enables two phases to be
monitored accurately in the same process. An example is monitoring the switching between
process and washing solutions.
n Sensor Ohm
This parameter represents the non-compensated resistance of the sensor.
n Sensor wellness
At the Sensor wellness window, the soundness of a module is displayed. A larger number of n
in each gauge indicates that the parameter concerned is sound. A gauge is indicated for only
those parameters whose sensor wellness setting is “enabled,” while a bar (----) is displayed if the
sensor wellness setting is “disabled.”
Sensor wellness setup can be made in Commissioning → Measurement setup → Sensor diag.
settings. For details, see section 10.1.7.
The “Reset wellness data” button can reset wellness data.
When a sensor is exchanged or replaced, sensor wellness data should be reset.
NOTE
When a sensor is replaced, the replacement can be recorded manually into a logbook. (Refer to
the figure 9.7.)
ISC
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