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FLXA21 HART 2-Wire Analyzer
Brand: Yokogawa Electric Corporation
The model FLXA21 2-Wire Analyzer, one model of FLEXA series, offers single or dual sensor measurement.
The modular-designed analyzer offers 4 kinds of measurements – pH/ORP (oxidation-reduction potential), contacting conductivity (SC), inductive conductivity (ISC) or dissolved oxygen (DO) – with the respective sensor module.
For dual sensor measurement, the combination of two same type sensor inputs – pH/ORP and pH/ORP (Analog sensor only), SC and SC, and DO and DO – are available with two sensor modules.
Dual sensor measurement offers additional functionalities, calculated data function and redundant system.
Variety of calculated data from two measuring parameters is selectable for each measurement.
On the redundant system built on two measuring parameters of two sensor inputs, main output parameter is automatically switched over to the second sensor output in case of the main sensor’s failure condition.
In the FLXA21 Human Machine Interface (HMI), 2-wire type analyzer FLXA21 offers easy touch screen operation and simple menu structure in 12 languages. Menus of display, execution and setting are displayed in a selected language.
For the wide range of industrial environment, the FLXA21 is designed with the enclosure of plastic, stainless steel or stainless steel with corrosion resistant coating. And, for hazardous location, the FLXA21 has approvals of ATEX, IECEx, FM, CSA and NEPSI.
Features- 4 kinds of measurements; pH/ORP, SC, ISC and DO
- Dual sensor measurement on 2-wire type analyzer; pH/ORP and pH/ORP, SC and SC, and DO and DO
- Calculated data from dual sensor measurement
- Redundant system on dual sensor measurement
- Connection of digital FU20F pH/ORP SENCOM Sensor
- Easy touch screen operation on 2-wire type analyzer
- Simple HMI menu structure in 12 languages
- Quick setup menu for immediate measurement
- Indication of sensor wellness
- Hazardous location approvals – ATEX, IECEx, FM, CSA, NEPSI and KOSHA
Specifications
Accuracy
- ± 0.05 ppm or ± 0.8 % of Full Scale, whichever is greater - for Dissolved Oxygen
- ± 0.3° C (± 0.54° F) - Temperature with Pt1000, Pb36, Ni100, 6.8k, PTC10k, NTC 8k55, 3k Balco, PTC500 for PH/ORP with Analog Sensors, Dissolved Oxygen, Conductivity
- ± 0.4° C (± 0.72° F) - Temperature with Pt100, NTC 8k55 for PH/ORP with Analog Sensors, Conductivity
- ± 0.5 % of Full Scale - Conductivity & Resistivity
- ± 1 ppb or ± 0.8 % of Full Scale, whichever is greater - for Dissolved Oxygen
- ± 1 % of Full Scale - Conductivity, Resistivity
- ORP: ± 1 mV - for PH/ORP with Analog Sensor
- pH: ± 0.01 PH - for PH/ORP with Analog Sensor
Ambient Temperature Range
- -20° to 55° C (-4° to 131° F)
Approvals & Certifications
- ATEX: Intrinsically Safe
- CE
- CSA: Intrinsic Safety & Non-Incendive
- EAC Ex
- EMC: EN 61326-1 Class A,Table 2 (For use in Industrial Locations), EN 61326-2-3, EN 61326-2-5, AS/NZS CISPR11, RCM: EN 55011 Class A, Group 1, Korea Electromagnetic Conformity Standard Class A
- FM: Intrinsic Safety & Non-Incendive
- IEC Ex: Intrinsic Safety
- KOSHA
- NAMUR 43 - for Burn Out Function (Except ISC)
- NEPSI: Intrinsic Safety
- UL: 61010-1, 61010-2-030
Cable Entry
- 1-Sensor Measurement: 3 Holes, M20 Cable Gland x 3-Pieces - for Plastic & Stainless Steel Case
- 2-Sensor Measurement: 4 Holes, M20 Cable Gland x 4-Pieces - for Plastic Case
Cable Length
- 200 feet (60 metres): Conductivity, Inductive Conductivity
Communication
- HART
- RS-485: Bi-Directional Digital Communication
Conduit Connection
- 1/2” NPT Female - Conduit Adapter
- G 1/2” Female - Conduit Adapter
- M20 x 1.5 Female - Conduit Adapter
Diameter
- 0.13” to 0.27” (3.4 to 7 mm) Grounding Cable for Plastic Case - Outer Diameter for Cable Size
- 0.23” to 0.47” (6 to 12 mm) Suitable for M20 Cable Gland - Outer Diameter for Cable Size
- Maximum
Display
- LCD with a Touch Screen (Black/White: 213 x 160 Pixels)
Electrical Connectors
- M4 Screw Terminal
Electrical Contacts
- Normally Closed
- Normally Open
Electrical Rating
- 220 Vdc, Max.
- 250 Vac, Max.
Enclosure Finish
- Electro-Polishing (For Stainless Steel Case without Painting) - Case Finish
- Silver Gray (Equivalent to Munsell 3.2PB7.4/1.2) - Case Color
- Stainless Steel with Epoxy Coating - Case, Hood
- Stainless Steel with High Anti-Corrosion Coating
- Stainless Steel with Urethane Coating - Case, Hood
Enclosure, Body Material
- Plastic (Polycarbonate)
- Stainless Steel
Environmental Protection
- Hazardous Area
- Intrinsically Safe
- IP66 (Except Canada)
- NEMA 3S (Canada)
- NEMA 4X
- Non-Incendive
Humidity
- 0 to 100 % Non-Condensing Relative Humidity - Ambient
- 10 to 90 % Relative Humidity, Non-Condensing at 40° C (104° F)
Input
- 0 to 100 RH - for PH/ORP with Analog Sensors & Digital Sensor
- 0 to 14 PH - for PH/ORP with Digital Sensor
- 0 to 50 mg/L (ppm) - Dissolved Oxygen for DO30 Sensor
- 0-1 µA - Dissolved Oxygen for Polarographic Sensors
- 0 to 50 µA to Dissolved Oxygen for Galvanic Sensors
- -2 to 16 PH - for PH/ORP with Analog Sensors
- ORP: -1,500 to 1,500 mV - for PH/ORP with Analog Sensors & Digital Sensor
- PTC/NTC Thermistor
Input Impedance
- Dual High Input Impedance: ≥ 10¹² ohms - for PH/ORP with Analog Sensors
Linearity
- ± (0.4 % of Full Scale + 0.3 μS/cm) - for Inductive Conductivity
- ± 0.01 PH - for PH/ORP with Analog Sensors
- ± 0.05 ppm or ± 0.8 % of Full Scale, whichever is greater - for Dissolved Oxygen
- ± 0.3° C (± 0.54° F) - Temperature with Pt1000, 6.8k, PTC10k, NTC 8k55, 3k Balco, PTC500: for PH/ORP with Analog Sensors, Dissolved Oxygen
- ± 0.4° C (± 0.72° F) - Temperature with Pt100: for PH/ORP with Analog Sensors
- ± 1 mV - ORP for PH/ORP with Analog Sensors
- ± 1 ppb or ± 0.8 % of Full Scale, whichever is greater - for Dissolved Oxygen
Load Resistance
- 0 to 1,295 ohms
- 2 kiloohms or Less (1-5 Vdc Output)
Materials of Construction
- Hood & Tag Plate: Stainless Steel
Measuring Range
- 10 ppb to 40 ppm - for Dissolved Oxygen Hamilton Sensor (Oxyferm)
- 2 ppb to 40 ppm - for Dissolved Oxygen Hamilton Sensor (Oxygold G)
- 8 ppb to 40 ppm - for Dissolved Oxygen Hamilton Sensor (Oxygold B)
Mounting
- Panel Mounting Hardware
- Pipe Mounting Hardware
- Universal Mounting Kit
- Wall Mounting Hardware
Operating Temperature
- -20° to 55° C (-4° to 131° F) - Ambient Operating Temperature
Output
- 1 to 50 mg/L (ppm) - Dissolved Oxygen Concentration
- 1 to 9,999 ppb - Dissolved Oxygen Concentration
- 10 to 600 % - Saturation for Dissolved Oxygen Concentration
- 1-5 Vdc
- 4-20 mA DC
Output Function
- Linear or Non-Linear Ouput
Output Span - Maximum
- 160° C (320° F) - for Inductive Conductivity
- 170° C (338° F) - for Dissolved Oxygen, PH/ORP with Analog & Digital Sensor
- 270° C (518° F) - for Conductivity
- ORP: 3,000 mV - for PH/ORP with Analog Sensors & Digital Sensors
- pH: 20 PH - for PH/ORP with Analog Sensors & Digital Sensors
- rH: 100 RH - for PH/ORP with Analog Sensors & Digital Sensors
Output Span - Minimum
- 25° C (77° F)
- ORP: 100 mV - for PH/ORP with Analog Sensors & Digital Sensors
- pH: 1 PH - for PH/ORP with Analog Sensors & Digital Sensors
- rH: 2 RH - for PH/ORP with Analog Sensors & Digital Sensors
Power Supply
- 16-40 Vdc (For PH/ORP Analog Sensor, SC & DO) - One Sensor Module (1 Input)
- 17-40 Vdc (For ISC) - One Sensor Module (1 Input)
- 21-40 Vdc (For PH/ORP SENCOM Sensor) - One Sensor Module (1 Input)
- 22.8-40 Vdc (For PH/ORP Analog Sensor, SC & DO) - Two Sensor Modules (2 Inputs)
- Nominal 24 Vdc Loop Powered System
Pressure Range
- psi: 11.6 to 15.95 (kPa: 80 to 110, bar: 0.8 to 1.1) - Atmosphere Pressure
Process Temperature
- 0° to 40° C (32° to 104° F) - for Dissolved Oxygen DO30 Sensor
Repeatability
- ± (0.4 % of Full Scale + 0.3 μS/cm) - for Inductive Conductivity
- ± 0.01 PH for PH/ORP with Analog Sensors
- ± 0.05 ppm or ± 0.8 % of Full Scale, whichever is greater - for Dissolved Oxygen
- ± 0.1° C (± 0.18° F) - Temperature with Pt1000, 6.8k, PTC10k, NTC 8k55, 3k Balco, PTC500, Pt100 for PH/ORP with Analog Sensors, Dissolved Oxygen
- ± 1 mV - ORP for PH/ORP with Analog Sensors
- ± 1 ppb or ± 0.8 % of Full Scale, whichever is greater - for Dissolved Oxygen
Response Time
- 90 % (< 2 Decades) in 7 seconds - Step Response for Conductivity (SC)
- 90 % (< 2 Decades) in 8 seconds - Step Response for Inductive Conductivity (ISC)
RTD Type
- Ni100
- Pt100
- Pt1000
Sensor, Probe Type
- NTC 8k55
- NTC22k
- NTC30k
- Pb36 (JIS NTC 6k)
- PTC10k
- PTC500
Storage Temperature
- -30° to 70° C (-22° to 158° F)
Temperature Range
- -10° to 105° C (14° to 221° F) - PH/ORP with Digital Sensor, FU20F PH/ORP SENCOM Sensor
- -20° to 140° C (-4° to 284° F) - Inductive Conductivity
- -20° to 150° C (-4° to 302° F) - Dissolved Oxygen
- -20° to 250° C (-4° to 482° F) - Conductivity
- -30° to 140° C (-22° to 284° F) - PH/ORP with Analog Sensors
Tolerance
- ± 0.02 mA
Torque
- 10.62 In/Lbs (1.2 Nm) - Torque of Screw Up
Window Material
- Polycarbonate (Flexible)
