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4.1.2
Connection to the Calibration Gas Inlet
4.1.3
Connection to the Reference Gas Inlet
IM 11M12A01-02E
When carrying out calibration, connect the piping (6(O.D) ~4(I.D.) mm tube) from the
standard gas unit to the calibration gas inlet of the detector. First, mount a stop valve (of
a quality specified by YOKOGAWA) on a nipple (found on the open market) as
illustrated in Figure 4.2, and mount a joint (also found on the open market) at the stop
valve tip. (The stop valve may be mounted on the detector prior to shipping the detec-
tor.)
Note 1: Mount the stop valve close to the detector.
Stop valve
Tube connection
joint
Figure 4.2 Connection to the calibration gas inlet
• Normally, no piping is required for the reference gas inlet when the equipment uses
natural convection for reference gas (models ZR22G- - - -C). Leave the plug as it
is . If the air around the detector is polluted and the necessary oxygen concentration
(21 vol% O
) cannot be obtained, prepare piping the same as which described in
2
Section 4.2, System 2.
• When the equipment uses instrument air for the reference gas, piping is required as
described in Section 4.2, System 2 (models ZR22G- - - -E or P).
Nipple
F4.2E.EPS
4. Piping
4-3
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