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<3. Installation, Tubing and Wiring>
3-7
IM 12F4A1-01E
3.2.3
Cleaning Water Tubing
This tubing is required for the raw water type and treated water type analyzers.
In these types of analyzers, intake sample water is filtered by the sand filter. For maintaining
filtering capacity, the sand filter is flushed with water at regular intervals to remove floccules, etc.
deposited in the filter.
The cleaning water tubing leads tap water for washing to the analyzer.
The connection is a rigid PVC tube of nominal dia. 16 (O.D. 22 mm).
Perform tubing in the same manner as the sample water tubing, using proper joints, so as to
allow cleaning water pressure to fall within the range of 100 to 500 kPa.
3.2.4
Drain Tubing
This is the tubing to discharge sample water and cleaning water from the analyzer to a drainage
ditch, etc..
The specifications of the tubing connections are given below.
In RC400G-1:
Rigid PVC tube, nominal dia. 40 (O.D. 48 mm)
In RC400G-2:
Rigid PVC tube, nominal dia. 40 (O.D. 48 mm)
In RC400G-3:
Rigid PVC tube, nominal dia. 40 (O.D. 48 mm)
Perform tubing so as to prevent sedimentation and formation of any dead spot in the tubing.
3.2.5
Purge Air Tubing
This is the tubing to supply clean dry air to the cases which house the converter, electrode
mechanism block and pump drive assembly for air purging.
When the RC400G is provided with an air pump, extend the tubing to an area free from corrosive
gases for intake of clean air. If an air pump is not available, employ instrument air, etc. and
perform tubing so that air is supplied at a pressure of approx. 140 kPa.
The connection is Rc1/4.
3.2.6
Standard Solution Tubing
This supplies standard solution to the analyzer for calibrating zero point or span.
Usually, this tubing is set up every time when calibration (refer to Chapter 7) is conducted.
The tubing connection is Rc1/4.
NOTE
Standard solution supplied from the tubing connection is directly fed to the metering pump. If the
pressure of the supplied standard solution largely exceeds 10 kPa, standard solution may enter
the reagent line or some quantity of solution more than specified may be sent to the detector
causing the measuring cell to overflow. As a rule, standard solution should be supplied only in the
manner described in Chapter 7.
3.2.7
Automatic Zero Calibration Tubing
This is the tubing that is used when zero calibration using an activated charcoal filter is
performed. If the option has been specified, this tubing is installed at the factory before shipment.
14th Edition : Jul. 15, 2020
Содержание RC400G
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