Yokogawa EXA ISC202 2-wire Conductivity Transmitter/Analyzer - Manual (Page 91)

IM 12D06A03-01E
Appendix 2-19
12-5. Installation factor adjustment
ACCESS CODE : 03
DISPLAY : *C.C.
Adjustment:
Adjust the ratio between the measured conductance of the sensor and the specific conductivity of the
solution.
Explanation:
The installation factor for the ISC40 detector is the ratio of the measured conductivity of the sensor and
the specific conductivity of the solution. This factor varies depending on materials of process piping and
the distance between the doughnut sensor and the process piping. If the distance is less than 30 mm,
sensor calibration is required before using the ISC40. From the calibration results, the ISC202 will calcu-
late an installation factor corresponding to the installation conditions and use it for conductivity measure-
ment.
In case where sensor calibration is difficult to be conducted, enter the manually calculated installation
factor into the ISC202 following the instructions below.
- When a sensor is installed in the standard stainless steel holder, ISC40FFJ-S, the installation factor
decreases approximately 7%. Reduce the value indicated on the label of the sensor cable by 7%,
and then enter the result.
- When a sensor is installed in the standard polypropylene holder, ISC40FFJ-P, the installation factor
increases approximately 1%. Increase the value indicated on the label of the sensor cable by 1%,
and then enter the result.
- When a sensor is installed in long piping with a distance (D) between the sensor and piping, as
shown in the figure below, the installation factor for pipe mounting (reference data when the nominal
value is 1.88 cm -1 ) is shown in the graph below. Divide the value indicated on the label of the
sensor cable by 1.88 and then multiply the quotient by the value obtained from the table. Enter the
result.
Default: 1.88 cm -1
D
non conductive
piping
conductive
piping
INST
ALLA
TION F
ACT
OR
D i n m i l l i m e t e r s
0 10 20 30 40 50
2.4
2.3
2.2
2.1
2.0
1.9
1.8
1.7
1.6
1.88
Figure for 7-2.eps
Figure 12-1. Installation factor for pipe mounting