YOKOGAWA SC150, Инструкция по эксплуатации

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IM 12D7B4-E-H
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11-3. Appendix 3
Sensor selection for the EXAxt SC150
Yokogawa supplies the following sensors, and their application is briefly described. All are
compatible with the EXAxt SC150, and the user must be aware of the sensor configuration
for 2 or 4 electrodes, in order to set the converter correctly.
SC42-SP34 (&SX42-SX34) cc = 0.01 cm
-1
2-electrode sensor
This sensor is the first choice for pure and ultra pure water measurements. From
0.055µS/cm up to 100µS/cm this is a perfect choice. The measuring range extends to at
least 1000µS/cm, but there are better choices in that range.
Almost exclusively used in flow fittings and sub-assemblies. FF40 and FS40. (The -SX
sensors are screwed or flanged direct into the process pipework or tanks.)
SC4A-S(T)-XX-002...... cc = 0.02 cm
-1
2-electrode sensor
This sensor is a good choice for pure and ultra pure water measurements. From
0.055µS/cm up to 50µS/cm this is a good choice. The measuring range extends to
500µS/cm, but there are better choices in that range. The "SC4A-" sensors make up a
range that use compression adapters or specialized fittings, including retractable.
SC42-SP24 (&SX42-SX24) cc = 0.1cm
-1
2-electrode sensor
This sensor should be used for clean and pure water measurements. From 0.2µS/cm up
to 1 mS/cm the sensor is fine, with measurement up to 10 mS/cm possible, but there are
better choices in that range. Mounting of these sensors is as for the ....-SP(X)34 series.
SC4A-S(T)-XX-010...... cc = 0.1 cm
-1
2-electrode sensor
This sensor is a good choice for clean water measurements. From 0.5µS/cm up to
200µS/cm this is a good choice. The measuring range extends to 2000µS/cm, but there
are better choices in that range. The "SC4A-" sensors make up a range that uses
compression adapters or specialized fittings, including retractable.
SC42-EP15(D) cc = 1 cm
-1
2-electrode sensor
This sensor is intended as a handy, short sensor. It is easy to fit in a branch (tee) on a
pipeline, and is good for measurements where the precision is less critical than a
convenient installation. The D version is particularly suited to food applications because of
it's cleanability. Range of application is from 10 µS/cm to 10 mS/cm.
SC42-EP14 cc = 1 cm -1 2-electrode sensor
Clean cooling and process water applications are where this sensor is used. The best
range of application is 10µS/cm to 10mS/cm. It is better suited to flow through
installations in FS40 and FF40 adapters and fittings, but it can also be used in dip tubes -
FD40.
SC42-EP18 cc = 1 cm
-1
4-electrode sensor
Cooling and process water applications are where this sensor is used, including light
fouling. The best range of application is 100µS/cm to 100mS/cm. The four-electrode
system copes with some contamination from the process, and eliminates the tendency for
polarization to occur at the higher conductivity. It is better suited to flow through installations
in FS40 and FF40 adapters and fittings, but it can also be used in dip tubes - FD40.