Yokogawa Pneumatic Retractables RF20H - Manual (Page 10)

IM 12B06K05-E-E
10
4.5 Installing the cleaning pipes
Cleaning of the sensor is possible while the process
is running. This requires supply and draining of
cleaning liquid to the cleaning chamber. If cleaning
of the sensor is not desired the cleaning ports must
be sealed by pegs.
Fig. 7: Cleaning ports
A Cleaning port “IN”
B Cleaning port “OUT”
Leakage of process liquid through the
open cleaning port!
Burns or tissue destruction depending on
process liquid property.
• Cleaning pipes must be installed
or
• cleaning ports “IN” and “OUT” must be
sealed by pegs!
If the process pressure is higher than
the cleaning pressure
process liquid enters the cleaning pipes
while the holder is moving to the service
position.
• A cleaning pipe with valve must be
installed at the cleaning ports “IN” and
“OUT”!
If the cleaning liquid pressure exceeds
6 bar
holder and sensor may be damaged.
• Install a pressure reducer, if necessary!
Contaminated cleaning liquid
can cause damage to the holder.
• Install a cleaning pipe with dirt trap at the
cleaning port “IN”!
How to install the cleaning pipes:
1) Install valve and dirt trap in the cleaning
pipe for the cleaning liquid supply.
2) Attach supply cleaning pipe to the
cleaning port “IN”. .
3) Install valve in cleaning pipe for drainage
of the cleaning liquid.
4) Attach cleaning pipe to the cleaning port
“OUT”.
5) Check all connections for tightness.
To avoid premature contamination of the
sensor the pressure of the cleaning liquid
should be at least 1 bar!
4.6 Installing the pneumatic tubes
The RF20H (Extract 810 and 820) retractable holder
is operated with compressed air. The extension
of the cylinder of the drive unit is fitted with four
compressed air connections.
Fig. 8: Pneumatic connections 1 - 4
Emitted compressed air
can cause material or personal damage.
Ensure tightness of pneumatic tubes before
supplying compressed air.
Contaminated compressed air
causes damages to the drive unit!
• Use filtered (40 µm), water-free and
deoiled compressed air!
You will need:
• 2 pneumatic tubes ø = 4mm
• 2 pneumatic tubes ø = 6mm.
A
B
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