Yokogawa Integral Oxygen Analyzer ZR202 - Manual (Page 63)

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4-3
IM 11M12A01-02E 8th Edition : Jan.13,2012-00
4.1.2 Connection to the Calibration Gas Inlet
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 local market) as illustrated in Figure 4.2, and mount a
joint (also found on the local market) at the stop valve tip. (The stop valve may be mounted on the
detector prior to shipping the detector.)
Note: Mount the stop valve close to the detector.
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Nipple Stop valve
Tube connection joint
Figure 4.2 Connection to the calibration gas inlet
4.1.3 Connection to the Reference Gas Inlet
• Normally, no piping is required for the reference gas inlet when the equipment uses natural
convection for the 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
2
) cannot be
obtained, prepare piping the same as which described in 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).
4.1.4 Piping to the High Temperature Probe Adapter
• The sample gas should be at a temperature below 700 °C before reaching the detector
sensor. If the gas is under negative pressure, it should be fed to the detector by suction.
• For usage of the probe adapter when using high temperature detector, refer to Section 3.2.2.
• If the sample gas is under negative pressure, connect the ejector assembly (E7046EC/
E7046EN) as illustrated in Figure 4.3. Mount the pressure gauge as close as possible to the
ejector assembly. However, if the ambient temperature is too high, mount the gauge in a
location with a temperature below 40 °C.
Ejector assembly for
high temperature use
Adapter for
high temperature probe
Detector
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Figure 4.3 Mounting the ejector assembly