<4. Operation>
4-2
IM 12B07W01-04EN 1st Edition : Nov 11, 2016-00
n PH8SM3 Holder
Terminal block
for limit switch
Limit switch
Senses that the
upper limit of the
sensor holder's
position is reached.
Spring
helps the bottom plate
of cleaning chamber
to tightly close during
cleaning.
Bottom plate of
cleaning chamber
Closes during cleaning
to hold the chemical
solution supplied from the
tank within the cleaning
chamber.
Cable inlet
Allows the cable (for the signal
which detects the upper limit of
the sensor holder's position)
to get through to the terminal
block for the limit switch.
Drip-proof cover protects against rain or dust.
Arm to support sensor holder
The sensor holder is installed
by simply inserting it into this arm.
Cleaning chamber
Accommodates the
pH sensor during cleaning
and allows the sensor
electrodes to be cleaned.
Air connection part for
actuating pneumatic
cylinder (downward)
Mounting bracket
Used to mount the PH8HS3
holder to a two-inch pipe.
Slider of pneumatic
cylinder
Goes up or down
pneumatically.
Air connection part for
actuating pneumatic
cylinder (upward)
Piping port for forced
feeding of chemical solution
Pneumatic cylinder
Sensor holder
Holds the pH sensor.
The sensor holder goes up
or down along with the slider
of the pneumatic cylinder.
(pH sensor)
O-ring
Protects the holder from
precipitation of solutions
Optional pneumatic cylinder cover,
to protect against dust.
Figure 4.2 Names and Functions of Components in PH8HS3 Holder
(Note) When you remove the sensor holder out of the unit during calibration or for some reasons,
take off the cover on the upper chassis. However, put the cover back to where it was to maintain
the isolation of limit switch terminals and prevent operation errors.
l How the slider of air cylinder moves
The slider of air cylinder moves up and down by the strength of magnet inside the pneumatic
cylinder. Stain or dust around the air cylinder hampers a smooth sliding of the cylinder. We highly
recommend the installation of cylinder be guaranteed in a clean environment.
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