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<4. Piping>
4-3
IM 11M13A01-04E
3rd Edition : Dec.15,2014-00
4.1.2 Piping for the Calibration Gas Inlet
This piping is to be installed between the zero gas cylinder and the ZA8F flow setting unit, and
between the ZA8F flow setting unit and the ZR202S analyzer.
The cylinder should be placed in a calibration gas unit case or the like to avoid any direct sunlight or
radiant heat so that the gas cylinder temperature may not exceed 40°C. Mount the pressure reducing
valve (recommended by YOKOGAWA) on the cylinder.
Mount the stop valve or the check valve (recommended by YOKOGAWA) through the nipple (found
on the local market) at the calibration gas inlet of the equipment as illustrated in Figure 4.2. (The stop
valve or the check valve may have been mounted on the equipment when shipped.)
Connect the ZA8F flow setting unit and the ZR202S analyzer to a 6 mm (O.D.) x 4 mm (I.D.) (or
nominal size 1/4 inches) or larger stainless steel pipe.
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Stop valve or check valve
Piping for the reference gas inlet
6mm (O.D.) by 4mm (I.D.)
Stainless steel pipe
Piping for the calibration gas inlet
6mm (O.D.) by 4mm (I.D.)
Stainless steel pipe
Piping for the reference gas outlet
6mm (O.D.) by 4mm (I.D.)
Stainless steel pipe
Figure 4.2
Piping for the Calibration Gas Inlet
4.1.3 Piping for the Reference Gas Inlet
Reference gas piping is required between the air source (instrument air) and the ZA8F flow setting
unit, and between the flow setting unit and the ZR202S analyzer.
Insert the air set next to the flow setting unit in the piping between the air source and the flow setting
unit.
Use a 6 mm (O.D.) x 4 mm (I.D.) (or nominal size 1/4 inch) stainless steel pipe between the flow
setting unit and the analyzer.
4.1.4 Piping for the Reference Gas Outlet
If the ZR202S is exposed to rain or water splash, connect the pipe outlet on downward.
Содержание ZR202S
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