Yokogawa Zirconia Oxygen Analyzer ZR402G-M-C-C-A/SCT
This analyzer consists basically of a probe and a converter that are used as both a Zirconia Oxygen Analyzer and High Temperature Humidity Analyzer. The probe is of direct insertion type, and the converter uses a digital display.
Two types of analyzers are available: separate type and integrated type. As its name implies, the integrated type combines probe and converter.
Separate and integrated type Zirconia oxygen analyzers need not use 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 the oxygen concentration of combustion gases in large or small boilers, various industrial furnace and combustion devices, or for the control of low-oxygen combustion.
Separate type and integrated type Zirconia High Temperature Humidity Analyzers are used to measure the humidity of hot gases continuously in driers which use an electrical heater or hot gas as the heat source.
They can also be used in a variety of manufacturing applications in humidifiers, as well as in driers, for humidity measurement and control. They can help improve productivity in these application fields.
Features
Yokogawa ZR402G Separate type Zirconia Oxygen Analyzer, Converter
Yokogawa Zirconia Oxygen Analyzer ZR402G-M-C-C-A/SCT
• The built-in heater assembly of the probe can be replaced on site, reducing maintenance costs.
• The probe uses a long-life, high-reliability Zirconia sensor.
• The probe uses three-reference gas supply methods (natural air convection, instrument air, and pressure compensated) in its applications.
• The separate type converter incorporates a LCD touch screen for ease of operation.
• This converter can be used as an oxygen analyzer as well as a high temperature humidity analyzer.
• The integrated type integrates both probe and converter, to reduce wiring, piping, and installation costs. This type of unit uses an optical switch for ease of operation at the site.
•Remote maintenance using digital communications (HART) reduces maintenance costs.
General Specifications
Yokogawa ZR402G Separate type Zirconia Oxygen Analyzer, Converter
Yokogawa Zirconia Oxygen Analyzer ZR402G-M-C-C-A/SCT
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Measurement object
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Oxygen concentration in combustion exhaust gas and mixed gas.
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Measurement system
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Zirconia system
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Measurement range
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0.01 to 100 vol%O2
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Output signal
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4 to 20 mA DC, two points (maximum load resistance 550 Ω)
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Setting range
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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)
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250 to 550 Ω, depending on number of field devices connected to the loop (multi-drop mode)
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Sample gas pressure
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-5 to +250 kPa
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Sample gas temperature
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0 to 700°C (Probe only)
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700 to 1400°C (with 0.15m probe and High Temperature Probe Adapter)
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Probe length
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0.15, 0.4, 0.7, 1.0, 1.5, 2.0, 2.5, 3.0, 3.6,4.2, 4.8, 5.4 m
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Contact output
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Four points (one is fail-safe, normally open)
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Contact input
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Two points
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Calibration
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Method ; zero/span calibration
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Calibration mode ;
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automatic, semi-automatic and manual (All are operated interactively with an LCD touchscreen)
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Construction of detector
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Heater and thermocouple replaceable construction.
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Non-explosion-proof. Equivalent to NEMA4X/IP66
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Construction of converter
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Outdoor installation. Equivalent to NEMA4X/IP66
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Ambient temperature
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Probe: -20 to 150°C
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Converter: -20 to 55°C
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Power supply
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85 to 264 V AC; 45 to 66 Hz
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Performance
Yokogawa ZR402G Separate type Zirconia Oxygen Analyzer, Converter
Yokogawa Zirconia Oxygen Analyzer ZR402G-M-C-C-A/SCT
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Repeatability
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±0.5% Maximum value of set range
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Linearity
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±1% Maximum value of set range
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Drift
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±2% Maximum value of set range/month
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Response time
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90% response within 5 sec
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Model and Suffix Codes
Yokogawa ZR402G Separate type Zirconia Oxygen Analyzer, Converter
Yokogawa Zirconia Oxygen Analyzer ZR402G-M-C-C-A/SCT
Model - - - - - - - - ZR402G, Separate type Zirconia Oxygen Analyzer, Converter
-P - - - - - - G1/2
-G- - - - - - Pg13.5
-M - - - - - - M20x1.5
-T - - - - - - 1/2NPT
Display
-J - - - - - - Japanese
-E - - - - - - English
-G - - - - - - German
-F - - - - - - French
-C - - - - - - Chinese
Instruction manual
-J - - - - - - Japanese
-E - - - - - - English
-C - - - - - - Chinese
-A - - - - - - Always -A
Option
/HS, Set for Humidity Analyzer (*1)
/H, Hood (*3)
Tag plate
/SCT, Stainless steel tag plate (*2)
/PT, Printed tag plate (*2)
NAMUR NE43 complian
/C2, Failure alarm down-scale: Output status at CPU failure and hardware error is 3.6 mA or less (*4)
/C3, Failure alarm up-scale: Output status at CPU failure and hardware error is 21.0 mA or more (*4)
*1 For humidity measurements, be sure to specify /HS options.
*2 Specify either /SCT or /PT option code.
*3 Sun shield hood is still effective even if scratched.
*4 Output signal limits: 3.8 to 20.5 mA. Specify either /C2 or /C3 option code.
(Note) If AC line voltage is 125 V AC or greater, or in the EEC, the ZO21D cannot be used with the ZR402G.
