YOKOGAWA FLXA21 Modular 2-Wire Conductivity Analyzer
The FLXA21 two-wire liquid analyzer 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.
The FLXA21 Conductivity Analyzer with temperature compensation function and built-in standard calibration table can monitor the contamination of cells and measure the electrical conductivity with higher precision. It has high versatility with the cell constant in the range of 0.005 to 50 cm-1, and both the 2-electrode and 4-electrode sensors can be used. In addition, 5 types of temperature sensors can be used to ensure accurate temperature compensation can be performed.
The FLXA21 offers ultrapure water compensation for demineralized water, steam, condensate and boiler water analysis. As for the ultrapure water monitoring in the pharmaceutical industry, the FLXA21 can monitor the water quality of process liquid according to the water quality standards to meet the USP (United States Pharmacopoeia) Chapter <645> (see Chapter 645 in the USP 23).
For the wide range of industrial environment, the FLXA21 pH/ORP Analyzer is designed with the enclosure of plastic, stainless steel or stainless steel with corrosion resistant coating.
Features
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Dual sensor measurement on 2-wire type analyzer; Conductivity sensor and conductivity sensor |
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Calculated data from dual sensor measurement |
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Redundant system on dual sensor measurement |
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Easy touch screen operation on 2-wire type analyzer |
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Simple HMI menu structure in 12 languages
(English, German, Portuguese, Russian, Chinese, Korean, Japanese, French, Italian, Spanish, Czech and Polish New) |
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Quick setup menu for immediate measurement |
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Cell fouling monitoring and indication of sensor wellness |
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HART communications |
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Enclosure – plastic, stainless steel or stainless steel with corrosion-resistant coating |
Specifications
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Input specification |
Two or four electrode measurement with square wave excitation, using max. 60 m cable and cell constants from 0.005 to 50.0 cm-1 |
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Detection method |
Frequency, read-pulse position and reference voltage are dynamically optimized. |
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Input ranges |
Conductivity: 0.000 μS/cm to 2000 mS/cm
Minimum: 1 μS/cm (underrange 0.000 μSx C).
Maximum: 200 mS/cm (overrange 2000 mS x C).
Resistivity: 0.0 Ω x cm to 1000 MΩ x cm
Minimum: 5 Ω x cm (underrange 0 Ω/C).
Maximum: 1 MΩ x cm (overrange 1000 MΩ/C).
Temperature: Pt1000: -20 to 250℃ (0 to 500℉)
Pt100 and Ni100: -20 to 200℃ (0 to 400℉)
NTC 8k55: -10 to 120℃ (10 to 250℉)
Pb36 NTC: -20 to 120℃ (0 to 250℉) |
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Transmission Signals |
One output of 4 to 20 mA DC. Bi-directional HART digital communication, superimposed on mA(4 to 20 mA) signal. Burn up (22.0 mA) or Burn down (3.6 mA) to signal failure accorded with NAMUR NE43. |
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Temperature compensation |
Automatic or manual, for temperature ranges.
Reference temp.: programmable from 0 to 100℃ or 30 to 210℉ (default 25℃). |
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Compensation algorithm |
According IEC 60746-3 NaCl tables (default).
Two independent user programmable temperature coefficients, from 0 to 10.0 %/deg C (deg F) by adjustment or calibration.
Matrix compensation: with conductivity function of concentration and temperature. Choice out of 13 preprogrammed matrixes. |
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Display |
Black/White (213 x 160 pixels) LCD with a touch screen. |
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Calibration |
Semi-automatic calibration using pre-configured OIML (KCl) buffer tables, with automatic stability check. Manual adjustment to grab sample. |
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Explosion-proof |
ATEX, IECEx, FM, CSA (pending) |
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Analyzer Structure |
Module structure |
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Housing |
Case: Plastic (Polycarbonate), stainless steel without painting, stainless steel with epoxy coating, stainless steel with urethane coating
Window: Polycarbonate (flexible)
Protection: NEMA4X, IP66 |
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Environment and operation conditions |
Ambient Operating Temperature : -20 to + 55℃
Storage Temperature : -30 to + 70℃
Humidity : 10 to 95% RH (Non-condensing) |
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Regulatory Compliance |
Safety : EN61010-1, CSA C22.2 No.61010-1(pending)
EMC : EN61326-1 Class A,Table 2 (For use in industrial locations), EN61326-2-3, AS/NZS CISPR11, Korea Electromagnetic Conformity Standard
Installation altitude: 2000 m or less
Category based on IEC 61010: I
Pollution degree based on IEC 61010: 2 |
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Power Supply |
Nominal 24 V DC loop powered system
One (1) Sensor module (1 input): 16 to 40V DC
Two (2) Sensor modules (2 inputs): 22.8 to 40V DC |
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Conduit Adapter |
G1/2, 1/2NPT, M20 x 1.5 |
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Weight |
Approx. 1 kg (Plastic housing), Approx. 2 kg (Stainless steel housing) |
Performance (Accuracy)
(The specifications are expressed with simulated inputs.)
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Conductivity |
Accuracy; |
±0.5% F.S. (2μS x Kcm-1 to 200mS x Kcm-1)
±1% F.S. (1μS x Kcm-1 to 2μS x Kcm-1) |
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Resistivity |
Accuracy; |
±0.5% F.S. (0.005kΩ/Kcm-1 to 0.5MΩ/Kcm-1)
±1% F.S. (0.5MΩ/Kcm-1 to 1MΩ/Kcm-1) |
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Temperature |
Accuracy; |
±0.3℃(Pt1000, Pb36, Ni100)
±0.4℃(Pt1000, NTC 8k55) |
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Temperature compensation |
NaCl table: ±1 %, Matrix: ±3 % |
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Step response |
90 % (< 2 decades) in 7 seconds | |
