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YOKOGAWA ZR22S, ZR202S Explosionproof Zirconia Oxygen Analyzers |
YOKOGAWA ZR22S, ZR202S Explosionproof Zirconia Oxygen Analyzers
Two types are available for an explosionproof direct in situ zirconia oxygen analyzer. Model ZR22S/ZR402G is a separate type which consists of a ZR22S explosionproof probe and a ZR402G non-explosionproof converter.
Model ZR202S is an integrated type which combines a probe and a converter. Both Zirconia oxygen analyzers do not need a sampling device, and allow direct installation of the probe in the wall of a flue or furnace to measure the concentration of oxygen in the stack gas. The converter displays the cell temperature and cell emf in addition to the oxygen concentration.
This analyzer is most suitable for monitoring combustion and controlling the low-oxygen combustion of various industrial furnaces in such explosive atmospheres as at petroleum refineries, petrochemical plants, and natural gas plants.
Features
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The built-in heater assembly of the probe can be replaced on site, reducing maintenance costs. |
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The probe uses a long-life, high-reliability Zirconia sensor. |
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The separate type converter ZR402G incorporates a LCD touch-screen for ease of operation. |
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The integrated type ZR202S integrates both probe and converter, to reduce wiring, piping, and installation costs. ZR202S of unit uses an optical switch for ease of operation at the site. |
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Remote maintenance using digital communications (HART) reduces maintenance costs. |
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Note: HART is a registered trademark of HART Communication Foundation. |
Specifications
ZR22S/ZR402G
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Measurement object |
Oxygen concentration in combustion exhaust gas and mixed gas. |
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Measurement system |
Zirconia system |
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Explosionproof Approval |
ZR22S-A (ATEX); EExd II B + H2, Group II,Category 2GD, T2, T300℃
ZR22S-B (FM); Class I, Division1, Groups B, C and D, Class II/III, Division1, Groups E, F and G, T2
ZR22S-C (CSA); Class I, Division1, Groups B, C and D, Class II/III, Division1, Groups E, F and G, T2
ZR22S-D (IECEx); Exd II B + H2, T2, ExtD A21 IP66 T300℃ |
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Oxygen concentration |
0.01 to 100 vol% O2 |
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Output signal |
4 to 20 mA DC, two points (maximum load resistance 550Ω) |
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Measurement range |
Any setting in the range of 0 - 5 vol%O2 to 0 - 100 vol%O2 (in 1 vol% O2), or partial range. |
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Digital communication (HART) |
250 to 550Ω, depending on number of field devices connected to the loop (multi-drop mode) |
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Sample gas pressure |
-5 to +5 kPa
For 0.15m probe, -0.5 to +5 kPa.
No pressure fluctuation in the furnace should be allowed. |
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Sample gas temperature |
0 to 700℃(Probe only)
700 to 1400℃ (with 0.15 m probe and high temperature probe adapter) |
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Probe length |
0.15, 0.4, 0.7, 1.0, 1.5, 2.0 m |
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Contact output (ZR402G) |
Four points (one is fail-safe, normally open) |
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Contact input (ZR402G) |
Two points |
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Calibration (ZR402G) |
Method; zero/span calibration
Calibration mode; automatic, semi-automatic and manual (with an LCD touch screen) |
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Construction of detector |
Equivalent to NEMA4X/IP66 |
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Construction of converter |
Outdoor installation, equivalent to NEMA4X/IP66 |
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Ambient Temperature (ZR22S) |
-20 to +60℃ (-20 to +150℃ on the terminal box surface) |
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Ambient Temperature (ZR402G) |
-20 to +55℃ |
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Reference Air System |
Instrument Air; 50 kPa + the pressure inside the furnace Consumption; Approx. 1Nl/min |
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Wiring Connection |
ATEX; M20 by 1.5 mm or 1/2 NPT select one type (2 pieces)
FM; 1/2 NPT (2 pieces)
CSA; 1/2 NPT (2 pieces)
IECEx; M20 by 1.5 mm or 1/2 NPT select one type (2 pieces) |
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Power supply |
85 to 264 V AC; 45 to 66 Hz | |
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