Yokogawa Single Channel Oxygen Analyzer System ZR22/ZR402 - Manual (Page 71)

IM 11M12A01-03E 4-4
4.2.2 Piping for the Calibration Gas
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 ZR22G detector.
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 does not exceed 40
Њ C.
Mount a regulator valve (specified by YOKOGAWA) on the cylinder.
Mount a check valve or the stop valve (specified by YOKOGAWA) or the nipple (found
on the open market) at the calibration gas inlet of the detector as illustrated in Figure
4.8. (The check valve or the stop valve may have been mounted on the detector when
shipped.) Connect the flow setting unit and the detector to a stainless steel pipe 6 mm
(O.D.)
ϫ4 mm or larger (I.D.) (or nominal size 1/4 inch).
F4.8E.EPS
Stop valve or Check valve
Piping for the Calibration gas, 6 mm (O.D.)
by 4 mm (I.D.) Stainless steel pipe
Piping for the Reference gas, 6 mm (O.D.)
by 4 mm (I.D.)Stainless steel pipe
Figure 4.8 Piping for the Calibration Gas Inlet
4.2.3 Piping for the Reference Gas
Reference gas piping is required between the air source (instrument air) and the flow
setting unit, and between the flow setting unit and the detector.
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.)
ϫ 4 mm or larger (I.D.) (or nominal size 1/4 inch) stainless steel
pipe between the flow setting unit and the detector.