Yokogawa Integral Oxygen Analyzer ZR202 - Manual (Page 51)

<4. Piping>
4-2
IM 11M12A01-04E
4.1.1 Piping Parts for System 1
Check that the parts listed in Table 4.1 are provided.
Table 4.1
Piping Parts
Equipment Piping location Parts Name Description
Oxygen Analyzer Calibration gas inlet Stop valve (L9852CB or G7016XH) recommended by
YOKOGAWA
Nipple * Rc1/4 or 1/4 NPT General parts
Joint for tube connection Rc1/4 (1/4NPT) for a
6x4mm soft tube
General parts
Reference gas inlet (Sealed up) (when piping is required, refer to Section 4.1.3)
Note: Parts with marking * are used when required.
General parts can be found on the local market.
4.1.2 Piping for the Calibration Gas
When carrying out calibration, connect the piping (6(O.D) x 4(I.D.) mm tube) from the standard gas
unit to the calibration gas inlet of the oxygen analyzer. Mount the stop valve (of a quality specified by
YOKOGAWA) through 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
equipment when the oxygen analyzer is shipped.)
Note: Mount the stop valve in the vicinity of the equipment.
F4.2E.ai
Stop valve
Tube connection
joint
Nipple
Figure 4.2 Piping for the Calibration Gas Inlet
4.1.3 Piping for the Reference Gas
• Normally, no piping is required for the reference gas inlet when the equipment applies natural
convection for reference gas (models ZR202G-----C). Leave the plug as it is. If the air
around the probe is polluted and the necessary oxygen concentration (21 vol%O
2
) cannot be
obtained, make instrument air piping as 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 ZR202G-----E or P).