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YOKOGAWA SC202G 2-Wire Conductivity/Resistivity Analyzer |
YOKOGAWA SC202G 2-Wire Conductivity/Resistivity Analyzer
Flexibility, reliability and low maintenance are among the benefits provided by the EXA SC202 conductivity/resistivity analyzer. Designed to meet the exacting requirements of measuring conductivity and resistivity in the modern industrial environment, it contains many features to ensure the best precision whatever the application.
The SC202 is housed in a robust IP65 field mountable case. The mA output, digital communication; HART®, Foundation Fieldbus H1 and Profibus PA, and a clear LCD make the SC202 a complete industrial analyzer.
A wide variety of temperature compensation possibilities (NaCl according to IEC 60746-3, manual TC, preprogrammed matrices and a free programmable 5x5 matrix), provide a high-accuracy measurement with minimum effort. The addition of a USP<645> as issued in ed. 23 pure water monitoring feature makes the SC202 ideal for the pharmaceutical industry.
Features
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Universal conductivity/resistivity, software switchable. |
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On-line sensor checking. |
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Event logbook in software. |
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Matrix temperature compensation for pure water applications. |
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Password protection for all levels of software. |
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Easy to use EXA control panel. |
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Pharmaceutical pure water monitoring (USP<645> as issued in ed. 23.). |
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HART®, PROFIBUS-PA, FOUNDATION Fieldbus H1 communications. |
Specifications
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Input specifications |
Two or four electrode measurement with square wave excitation.
Cell constant from 0.008 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: Minimum: 0 μS/cm
Maximum: 200 mS x C (overrange 1999 mS/cm).
Resistivity: Minimum: 0.005 kΩ/C
Maximum: 999 MΩ x cm
Temperature:
Pt1000: -20 to 250℃ (0 to 500℉)
Pt100 and Ni100: -20 to 200℃ (0 to 400deg F)
8k55 NTC: -10 to 120℃ (10 to 250℉)
PB36 NTC: -20 to 120℃ (0 to 250℉) |
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Output Span |
Conductivity: Min. 0.01 μS/cm, Max. 1999 mS/cm. (Max 90 % zero suppression)
Resistivity: Min. 0.001 kΩ x cm, Max. 999 MΩ x cm. (Max 90 % zero suppression) |
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Transmission Signals |
Isolated output of 4 to 20 mA DC. Burn up (21 mA) or Burn down (3.6 mA when HART or distributor comm. is non-used, 3.9 mA when HART or distributor comm. is used) or pulse of 21 mA to signal failure. |
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Temperature compensation |
Automatic, for temperature ranges
Reference temp.: programmable from 0 to 100℃ or 30 to 210℉ (default 25℃). |
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Compensation algorithm |
NaCl: According IEC60746-3 NaCl tables (default).
T.C: Two independent user programmable temperature coefficients, from 0 to 3.5 % per℃ (℉) by adjustment or calibration.
Matrix: Conductivity function of concentration and temperature. Choice out of 5 preprogrammed matrices and a 25-point user programmable matrix. |
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Communications |
HART®, PROFIBUS-PA, FOUNDATION Fieldbus H1 |
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Ambient temperature |
-10 to 50℃ |
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Humidity |
10 to 90 % RH (Non-condensing) |
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Display |
Custom liquid crystal display, with a main display of 3 1/2 digits 12.5 mm high. |
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Power supply |
Nominal 24 volt DC loop powered system.
SC202G: 17 to 40 V
SC202S: 17 to 31.5 V |
Performance (Under reference conditions with sensor simulation)
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Conductivity |
Accuracy: ±0.5 % F.S. (2 μS x K cm-1 to 200 mS x K cm-1) |
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Resistivity |
Accuracy: ±0.5 % F.S. (0.005 kΩ/K cm-1 to 0.5 MΩ/K cm-1) |
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Temperature |
Accuracy: ±0.3℃ (Pt1000, PB36NTC, Ni100) |
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Step responce |
90 % (<2 decades) in 7 seconds | |
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