Yokogawa Single Channel Oxygen Analyzer System ZR22/ZR402 - Manual (Page 70)

IM 11M13A01-02E 4-1
4. Piping
4. Piping
This chapter describes piping procedures based on two typical system configurations for
EXAxt ZR Separate-type Explosionproof Zirconia Oxygen Analyzer.
• Ensure that each check valve, stop valve and joint used for piping do not allow
leakage. Especially, if there is any leakage of the calibration gas from pipes and joints,
it may cause clogging of the pipes or incorrect calibration.
• Be sure to conduct leakage test after piping.
• Basically, apply instrument air (dehumidified by cooling to the dew point -20
Њ C or
lower, and removing any dust, oil mist and the like) for the reference gas.
WARNING
Do not loosen or remove any Flame Arrester of gas inlet/outlet during piping. The
detector modification or parts replacement by other than authorized representative of
Yokogawa Electric Corporation is prohibited and will void ATEX Flameproof
Certification, Factory Mutual Explosionproof Approval and Canadian Standards
Explosionproof Certification.
Flame Arrester
F4.0E.EPS