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3.
Mounting and Wiring
3.1
Mounting
Before mounting an electrode in a process plant environment, the following points should be
considered.
• The electrode must be mounted in the process in such a way that the flow through
it represents the true composition of the liquid. The flow through the cell should be
uninterrupted and the cell should not be mounted at a dead angle.
• A cell must be immersed in the process liquid to a level above the outlet to ensure an
uninterrupted liquid path between the electrodes.
• The sensor should be mounted in such a way to allow safe and easy removal for
maintenance, and to release the process liquid pressure for the removal.
• Check the process pressure for mounting place is below the pressure range of the SC4AJ
and its adapter.
• Do not submerge the sensor itself in process water, as the seams between the mold and the
metal of the sensor are not waterproof.
CAUTION
When ultra-pure water flows through plastic pipe, electrostatic charge may be produced.
When the sensor is installed on this plastic pipe, the electrostatic charge goes through the
sensor, and into a converter circuit through terminals on the converter which is connected to the
sensor. This electrostatic charge will discharge and damage electronic parts on the converter
circuit.
3.1.1
Adapter mounting type (-AD)
Option code /PS, /RS (material: stainless steel) and /PF, /RF (material: PVDF) are for the
adapters special for the Adapter Mounting Type of the SC4AJ. As for their dimensions, refer
to section 2.5. Mounting is done by the combination of the sensor with the adapter. Mount the
sensor by the correct insertion order of adapter parts according to Figure 3.1.
Note: Screwing the nut by the incorrect order of the parts can cause trouble of the mounting system and sealing defective.
Tighten the nut with a torque of approx. 190 N•m. This corresponds approximately to first tightening
with the fingers, then using a spanner or the like to tighten by one and a quarter turns.
Adapter
(/PS, /PF
/RS, /RF)
Figure 3.1
Nut
Mounted sensor (SC4AJ-AD)
< 3. Mounting and Wiring >
F3-1.ai
IM 12D08F03-02E
3-1
10th Edition: Sep. 30, 2019-00
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