Yokogawa SC202G Conductivity/Resistivity Analyzer

Specifications Yokogawa SC202G 2-Wire Conductivity/Resistivity Analyzer

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Conductivity Analyzers   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

*	Universal conductivity/resistivity, software switchable.
*	On-line sensor checking.
*	Event logbook in software.
*	Matrix temperature compensation for pure water applications.
*	Password protection for all levels of software.
*	Easy to use EXA control panel.
*	Pharmaceutical pure water monitoring (USP<645> as issued in ed. 23.).
*	HART®, PROFIBUS-PA, FOUNDATION Fieldbus H1 communications.

Specifications

Input specifications	Two or four electrode measurement with square wave excitation. Cell constant from 0.008 to 50.0 cm-1
Detection method	Frequency, read-pulse position and reference voltage are dynamically optimized.
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°C (0 to 500°F)   Pt100 and Ni100: -20 to 200°C (0 to 400deg F)   8k55 NTC: -10 to 120°C (10 to 250°F)   PB36 NTC: -20 to 120°C (0 to 250°F)
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)
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.
Temperature compensation	Automatic, for temperature ranges Reference temp.: programmable from 0 to 100°C or 30 to 210°F (default 25°C).
Compensation algorithm	NaCl: According IEC60746-3 NaCl tables (default). T.C: Two independent user programmable temperature coefficients, from 0 to 3.5 % per°C (°F) by adjustment or calibration. Matrix: Conductivity function of concentration and temperature. Choice out of 5 preprogrammed matrices and a 25-point user programmable matrix.
Communications	HART®, PROFIBUS-PA, FOUNDATION Fieldbus H1
Ambient temperature	-10 to 50°C
Humidity	10 to 90 % RH (Non-condensing)
Display	Custom liquid crystal display, with a main display of 3 1/2 digits 12.5 mm high.
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)

Conductivity	Accuracy: ±0.5 % F.S. (2 μS x K cm-1 to 200 mS x K cm-1)
Resistivity	Accuracy: ±0.5 % F.S. (0.005 kΩ/K cm-1 to 0.5 MΩ/K cm-1)
Temperature	Accuracy: ±0.3°C (Pt1000, PB36NTC, Ni100)
Step responce	90 % (<2 decades) in 7 seconds