Yokogawa Zirconia Analyzer ZR202G
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 Zirconia Analyzer ZR202G
• 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 Zirconia Analyzer ZR202G
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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 Zirconia Analyzer ZR202G
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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 Zirconia Analyzer ZR202G
Model - - - - - - - - ZR202G, Integrated type Zirconia Oxygen/ High Temperature Humidity
Length
-040 - - - - - - - - - - 0.4 m
-070 - - - - - - - - - - 0.7 m
-100 - - - - - - - - - - 1.0 m
-150 - - - - - - - - - - 1.5 m
-200 - - - - - - - - - - 2.0 m
-250 - - - - - - - - - - 2.5 m (*1)
-300 - - - - - - - - - - 3.0 m (*1)
Wetted material
-S - - - - - - - - - - - Stainless steel
-C - - - - - - - - - - - Stainless steel with Inconel calibration gas tube (*10)
Flange (*2)
-A - - - - - - - - - - ANSI Class 150 2 RF SUS304 (JIS)
-B - - - - - - - - - - ANSI Class 150 3 RF SUS304 (JIS)
-C - - - - - - - - - - ANSI Class 150 4 RF SUS304 (JIS)
-E - - - - - - - - - - DIN PN10 DN50 A SUS304 (JIS)
-F - - - - - - - - - - DIN PN10 DN80 A SUS304 (JIS)
-G - - - - - - - - - - DIN PN10 DN100 A SUS304 (JIS)
-K - - - - - - - - - - JIS 5K 65 FF SUS304 (JIS)
-L - - - - - - - - - - JIS 10K 65 FF SUS304 (JIS)
-M - - - - - - - - - - JIS 10K 80 FF SUS304 (JIS)
-P - - - - - - - - - - JIS 10K 100 FF SUS304 (JIS)
-Q - - - - - - - - - - JIS 5K 32 FF SUS304 (JIS) (for high temperature use) (*4)
-R - - - - - - - - - - JPI Class 150 4 RF SUS304 (JIS)
-S - - - - - - - - - - JPI Class 150 3 RF SUS304 (JIS)
-W - - - - - - - - - - Westinghouse
Auto Calibration
-N - - - - - - - - - - Not required
-A - - - - - - - - - - Horizontal mounting (*8)
-B - - - - - - - - - - Vertical mounting (*8)
Reference gas
-C - - - - - - - - - - Natural convection
-E - - - - - - - - - - External connection (Instrument air) (*11)
-P - - - - - - - - - - Pressure compensated (*11)
Gas Thread
-R - - - - - - - - - - Rc1/4
-T - - - - - - - - - - 1/4NPT(Female)
Connection box thread
-P - - - - - - - - - - G1/2
-G - - - - - - - - - - Pg13.5
-M - - - - - - - - - - M20 x1.5
-T - - - - - - - - - - 1/2 NPT
Instruction manual
-J - - - - - - - - - - Japanese
-E - - - - - - - - - - English
-C - - - - - - - - - - Chinese
-A - - - - - - - - - - Always -A
Options
Valves
/C, Inconel bolt (*3)
/HS, Set for Humidity Analyzer (*4)
/CV, Check valve (*5)
/SV, Stop valve (*5)
/H, Hood (*9)
/F1, Dust Filter (*6)
/F2, Dust Guard Protector (*6)
Tag plates
/SCT, Stainless steel tag plate (*7)
/PT, Printed tag plate (*7)
NAMUR NE43 compliant
/C2, Failure alarm down-scale: Output status at CPU failure and hardware error is 3.6 mA or less (*12)
/C3, Failure alarm up-scale: Output status at CPU failure and hardware error is 21.0 mA or more (*12)
*1 For the horizontally installed probe whose insertion length is 2.5 m or more, use the Probe Protector. Be sure to specify ZO21R-L-200- . Specify the flange suffix code either -C or -K. Yokogawa Zirconia Analyzer ZR202G
*2 The thickness of the flange depends on its dimensions.
*3 Inconel probe bolts and U shape pipe are used. Use this option for high temperature use (ranging from 600 to 700°C).
*4 For humidity measurements, be sure to specify /HS options. Pressure compensation of reference gas can not be selected.
*5 Specify either /CV or /SV option code.
*6 Not used with the high temperature humidity analyzer.
*7 Specify either /SCT or /PT option code.
*8 No need to specify the option codes, /CV and /SV, since the check valves are provided with the Automatic Calibration Unit. Automatic calibration cannot be used when natural convection is selected as reference air.
*9 Sun shield hood is still effective even if scratched. Hood is necessary for outdoor installation out of sun shield roof.
*10 Recommended if sample gas contains corrosive gas like chlorine.
*11 Piping for reference gas must be installed to supply reference gas constantly at a specified flow rate.
*12 Output signal limits: 3.8 to 20.5 mA. Specify either /C2 or /C3 option code.
