2-Wire Transmitter/Analyzer FLXA202

The FLEXA™ series analyzers are modular-designed analyzers used for continuous online measurements in industrial installations. They offer single or dual sensor measurement, making them the most flexible 2-wire analyzer available.

With the FLXA202, there is no need for multiple analyzers, since it is easily scalable at the site location by swapping the internal measurement module to what is needed, giving you more flexibility and optimizing your OPEX.

What is an Analyzer/Transmitter?

Transmitters and analyzers communicate a range of measurement data to help detect, diagnose, and predict problems to maintain plant performance and profitability. Analyzers and transmitters play an important role in many industries, including chemical plants, water treatment, industrial water, oil & gas, pulp & paper, and food & beverage.

Details

Main Features

Support of Up to Two Sensors

Dual Channel analyzerThrough the installation of up to two sensors, FLXA202 realizes interruption-free measurement even during maintenance. For dual sensor measurement, the sensor modules must be the same parameter – pH/ORP and pH/ORP, SC and SC, and DO and DO. Dual sensor measurement offers additional functionalities including a variety of calculated data from the two measuring parameters, as well as, the option to program the analyzer as a redundant system.

Advanced Functions

With the FLXA202, one analyzer can accept any of four types of measurements: pH/ORP, Contacting Conductivity (SC), Inductive Conductivity (ISC) and Dissolved Oxygen (DO)Sensors with self-diagnostics capabilities. Additional functions include:

  • Continuous measurement of sensor impedance, asymmetric potential, and slope, and continuous monitoring for electrode contamination/damage, burnout, and decline in measurement liquid level (ex. pH Analyzer).
  • Online Sensor Wellness checking for predictive maintenance.

Clear Touch Panel Display for Improved Operability

The FLEXA series analyzer provides improved operability with intuitive touchscreen operation, featuring a clear display and user-friendly indication with 12 languages. A quick setup menu for immediate measurement and a display of sensor status and estimated maintenance time improve efficiency. The interactive screen is housed in a robust aluminum die-cast housing (FLXA202).

Modular Design for Increased Scalability

The FLEXA™ series analyzer features a modular design with replaceable sensor modules, enabling the construction of a variety of systems. Users can opt to do without a display and can also select the case material (plastic or stainless steel).

 

Common Specification

Area Classification General Purpose
Class I Div II (without the use of IS Barrier)
Class I Div I (with the use of IS Barrier)
Enclosure Material Aluminum alloy die cast with epoxy coating (Standard offering
Aluminum alloy die cast with urethane or high anti-corrosion coating (available upon request)
Housing Rating IP66 (except Canada), Type 4X (except Canada), Type 3S/4X (Canada)
Power Supply 2-wire 24VDC Loop Powered
Output Signal Bi-directional HART digital communication, superimposed on mA (4-20mA) signal
Intrinsically safe type ATEX, IECEx, FM, CSA and NEPSI, and nonincendive of FM and CSA

Benefits of pH / ORP Measurement

Achieves high-precision pH measurement

  • Built-in calibration standard table with temperature compensation function and stability check function.
  • The detector status is checked and monitored in real time.
  • Temperature and oxidation-reduction potential (ORP) can also be measured.

Reduced maintenance man-hours by checking health level and predicting maintenance timing

  • Continuously measures the impedance, asymmetric potential, slope, etc. of the detector to continuously self-diagnose the status of the detector, such as contamination/damage, disconnection of the electrode, lowering of the measuring liquid level, etc.
  • Save the latest five calibration results to predict the health of the detector and future maintenance and calibration timing.

Compatible with various other types of explosion-proof

 

pH / ORP Measurement Specification

Input Range pH: -2 to 16 pH (with option /K: 0 to 14 pH) 
ORP: -1500 to 1500 mV 
rH: 0 to 100 rH 
Temperature: Pt1000, Pt100, 6.8k, PTC10k, 3k Balco, PTC500: -30 to 140 ºC, NTC 8k55: -10 to 120 ºC
Performance
(The specifications are expressed with simulated inputs.)
pH Linearity: ±0.01 pH, Repeatability: ±0.01 pH, Accuracy: ±0.01 pH
ORP Linearity: ±1 mV, Repeatability: ±1 mV, Accuracy: ±1 mV
Temperature with Pt1000, PTC500, 6.8k, PTC10k, NTC 8k55, 3k Balco
Linearity: ±0.3 ºC, Repeatability: ±0.1 ºC, Accuracy: ±0.3 ºC
with Pt100
Linearity: ±0.4 ºC, Repeatability: ±0.1 ºC, Accuracy: ±0.4 ºC

 

Sensors to combine

Analog Sensors

The analog detector connects directly to the FLXA202 module.

Please confirm the details of each detector from the following.
→ pH sensors/ORP sensors

Dual Channel analyzer

SENCOM smart adapter SA11 compatible sensor

When used as a digital compatible sensor, it is used in combination with the SA11 SENCOM  smart adapter.

Applicable to the following detectors with Variopin connector option.
→ All-in-One pH/ORP (REDOX) Sensor FU20  and FU24
→ Wide Body Sensor for Water and Wastewater PH21
→ pH/ORP Sensors PH8EFP/PH8ERP
→ Pure Water pH and ORP Sensors PH8EHP

Dual Channel analyzer

 

Benefits of Conductivity / Resistivity Measurement

Realizes highly versatile and high-precision measurement

  • The built-in temperature compensation function and calibration standard table enable higher-precision conductivity measurement by monitoring the contamination of the cell.
  • Cell constants correspond to 0.005 to 50 cm-1.
  • Both 2-electrode and 4-electrode sensors can be used.
  • Five types of temperature detectors are supported, and accurate temperature compensation (linear temperature compensation/matrix temperature compensation) is performed.

Pure water and compliance with stringent standards for WFI monitoring (USP item <645>)

  • In the analysis of demineralized water, steam, condensate, and boiler water, pure water compensation is performed.
  • Monitors the quality of the process solution in accordance with the USP (U.S. PHARMACEUTICAL) entry <645> (see Section 645 of USP23) guideline (U.S. PHARMACEUTICAL GUIDE), which serves as the basis for monitoring pure water in the PHARMACEUTICAL INDUSTRY.

Compatible with various other types of explosion-proof

 

Conductivity / Resistivity Measurement Specification

Input Specification Two or four electrodes measurement with square wave excitation, using max 60m (200ft) cable (WU40/WF10) and cell constants from 0.005 to 50.0 cm-1
Display range Conductivity min. 0.01 µS/cm, max. 2000 mS/cm (max 90% zero suppression)
Resistivity min. 0.001 kΩ x cm, max. 1000 MΩ x cm (max 90% zero suppression)
Temperature min. span 25 ºC, max. span 270 ºC
Performance
(Accuracy)(The specifications are expressed with simulated inputs.)
Conductivity 2 µS x K cm-1 to 200 mS x K cm-1: Accuracy: ±0.5%F.S.
1 µS x K cm-1 to 2 µS x K cm-1: Accuracy: ±1%F.S.
Resistivity 0.005kΩ / K cm-1 to 0.5MΩ /K cm-1: Accuracy: ±0.5%F.S.
0.5MΩ / K cm-1 to 1MΩ /K cm-1: Accuracy: ±1%F.S.
Temperature with Pt1000, Pb36, Ni100:  Accuracy: ±0.3 ºC
with Pt100, NTC 8k55:  Accuracy: ±0.4 ºC
Temperature compensation NaCl table: ±1 %
Matrix: ±3 %
Temperature 90 % (< 2 decades) in 7 seconds

 

Sensors to combine

Analog Sensors

The analog detector connects directly to the FLXA202 module.

Please confirm the details of each detector from the following.
→ Conductivity Sensors

Dual Channel analyzer

SENCOM smart adapter SA11 compatible sensor

When used as a digital compatible sensor, it is used in combination with the SA11 SENCOM  smart adapter.

Applicable to the following detectors with Variopin connector option.
→ Contacting Conductivity Sensors SC42/SC4A

Dual Channel analyzer

 

Benefits of Inductive Conductivity Measurement

Strong acid and strong alkali are also measured, and high-precision measurement with confidence is available for a wide range of applications.

  • For non-contact measurement, it is subject to measurement from acid and alkaline solutions to salt-containing solutions.
  • It has a matrix compensation and output linearization function to accurately analyze solutions of strong acid and strong alkali.
  • Level monitoring in the chemical industry, food and chemical industries, plating and surface treatment industries, paper and pulp industries, etc. makes measurements of electromagnetic conductivity for a wide range of applications with high accuracy.

Output function

  • One 4-20 mA output for recording, display, and control.
  • Select the measurement parameter from Conductivity, Level or Temperature.
  • Only one sensor can be connected.

Compatible with various other types of explosion-proof

 

Inductive Conductivity Measurement Specification

Input Specification Compatible with the Yokogawa inductive conductivity ISC40 series with integrated temperature sensor: NTC30k or Pt1000.
Input Range Conductivity 0 to 2000 mS/cm at 25 ºC reference temperature.
Temperature -20 to 140 ºC
Cable length max. 60 meters total length of fixed sensor cable + WF10(J) extension cable.
Influence of cable can be adjusted by doing an AIR CAL with the cable connected to a dry cell.
Performance
(The specifications are expressed with simulated inputs.)
Conductivity Linearity: ±(0.4 %F.S. + 0.3 µS/cm)
Repeatability: ±(0.4 %F.S. + 0.3 µS/cm)
Temperature ±0.3 ºC
Step response 90 % (< 2 decades) in 8 seconds

 

Sensors to combine

Analog Sensors

The analog detector connects directly to the FLXA202 module.

Please confirm the details of each detector from the following.
→ Conductivity Sensors

Dual Channel analyzer

Benefits of Dissolved Oxygen Measurement

Process Analyzer with High Functionality, High Reliability, and Reduced Maintenance
Can be used under severe environmental conditions and is ideal for on-site installation

  • Either galvanic or polarographic sensors can be used.
  • Indicated units are mg/L, ppm and % saturation.
  • Corrections are made for changes in atmospheric pressure, salinity, and temperature depending on altitude, etc., even in harsh environments.
  • High-precision measurement is possible.
  • One 4-20 mA output is provided for recording, display, and control.
  • Concentration, temperature or calculated values of the two detectors, plus the following output functions are also configurable:
    • Hold function: Hold the output signal to the last measured value or fixed value (hold).
    • Burnout function: Burn-up (22.0mA) or burn-down signal (3.6 mA) is output in case of failure.

Compatible with various other types of explosion-proof

 

Dissolved Oxygen Measurement Specification

Input Specification The FLXA202 accepts output from membrane covered Dissolved Oxygen sensors. These sensors can be Galvanic type, where the sensor generates its own driving voltage or Polarographic type, where the sensor uses external driving voltage from the converter.
The input range is 0 to 50 µA for Galvanic sensors and 0 to 1 µA for Polarographic sensors.
For temperature compensation, the FLXA202 accepts Pt1000 (DO30 sensor) and NTC22k elements (OXYFERM and OXYGOLD sensors).
Measurement Range DO Sensors Dissolved Oxygen: 0 to 50 mg/l (ppm)
Temperature: -20 to 150 ºC
DO30G Measurement range: 0 to 20 mg/l (ppm)
Temperature: 0 to 40 ºC
Performance
(Accuracy) (Performance in ppm mode)
Linearity ±0.05 ppm or ±0.8% F.S., whichever is greater
Repeatability ±0.05 ppm or ±0.8% F.S., whichever is greater
Accuracy ±0.05 ppm or ±0.8% F.S., whichever is greater
Temperature Linearity: ±0.3 ºC
Repeatability: ±0.1 ºC
Accuracy: ±0.3 ºC

 

Sensors to combine

Analog Sensors

The analog detector connects directly to the FLXA202 module.

Please confirm the details of each detector from the following.
→ Dissolved Oxygen Sensors

Dual Channel analyzer

Resources

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Conductivity measurement can be used as a reliable indicator of the real-time brine concentration. Using an online process analyzer removes the need for timely grab sample analysis. 

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Overview:

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Application Note
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Industry:Electrical and Electronics

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