Data Acquisition & Telemetry


Multiparameter acquisition system for analytical measurements

April 2003 Data Acquisition & Telemetry

JUMO in Germany has developed a versatile acquisition system suitable for use with most sensor signals, based on its successful Logoscreen 500 paperless recorder.

The Logoscreen Aqua 500, available from ASStech Process Electronics & Instrumentation, can be fitted with three or six measurement channels. Input signals include standard current or voltage signals - or signals from temperature sensors as well as special measurement variables such as pH value, redox potential, chlorine, chlorine dioxide, ozone or conductivity. The Logoscreen 500 functions are all present in the Logoscreen Aqua 500.

An innovative feature is that the calibration procedures, for example for pH measurement, are integrated into the instrument, so that a separate full-function pH transmitter is not required. For pH/redox measurement via a JUMO 2-wire transmitter, or an impedance converter, the Aqua 500 offers menu-led calibration of the sensors, with 1, 2 or 3-point calibration and featuring automatic temperature compensation.

When measuring conductivity, features include calibration of cell constant and temperature coefficient, and automatic temperature compensation. The non-linear concentration curves are integrated (H2SO4, fuming sulphuric acid, HNO3, HCl, NaOH, NaCl, KOH) and high-purity water compensation is as per ASTM and USP.

Free chlorine, chlorine dioxide and ozone measurement has single-point calibration and pH value and temperature-compensation for chlorine measurement. Common features of all measurement inputs include evaluation of the electrode condition in plain text, log of calibration procedures and sensor ageing, integrated calibration procedures, a maximum of three alarm relays and optional interface.

For more information contact Anastas Schnippenkotter, ASSTech Process Electronics & Instrumentation, 011 794 7057.



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