Yokogawa Pneumatic Retractables RF20H - Manual (Page 7)

IM 12B06K05-E-E
7
2.2 Process integration
Fig. 2: Process flow
Control
The RF20H (Extract 810 and 820) retractable holder
can be operated by the automatic control EXmatic.
It optimally matches the functions of the holder.
Transmitter
The retractable holder inserts a sensor in the
process liquid transmitting its measuring results to a
transmitter.
Process control
The external control and the transmitter can
be connected to a process control unit. The
measuring and cleaning intervals are then controlled
automatically according to the measuring results.
Pressure Temperature
The choice of the applicable holder is subject to
the pressure and temperature conditions of the
process. The retractable holder of stainless steel or
Alloy C-22 can be used for a pressure of up to 16
bar and the plastic model up to 10 bar according to
the temperature. The process temperature should
be between -10° and 140°C.
Observe pressure and temperature charts in
chapter 8!
Installation position
The operation of the holder is generally possible in
any position. The reliability of the measuring results
depends on the properties of the selected sensor.
The sensor should be connected in a position less
than 15º to the hozizontal plane.
Process Control System
Transmitter
Cleaning
solution
Drain
RF20M
(Exmatic 450)
24V DC
Air 4-6 bar
CAUTION!
DANGER!
WARNING!