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Dual input conductivity transmitters
Volume 24/Number l/January 1992
Dual Input Conductivity Transmitters A new electrolytic conductivity transmitter which features an advanced dual input capability for providing 'before' and 'after' comparative measurements in the treatment of water for industrial plants, has been developed by ABB Kent-Taylor. It is a high specification instrument and comes in two versions--the wall/ pipe-mounted Model 4511 and the panel-mounted Model 4521. Each has a two-cell input capability together with a facility for calculating the differential, or ratio, measurement between them. This ability to provide users with an 'at-a-glance' display of comparative conductivity readings from a single sample solution enables Models 4511/21 to do the work of two traditional instruments. Used in conjunction with ABB Kent-Taylor's range of conductivity cells, the new transmitters can also perform accurate and reliable monitoring operations. A measure of various charged ionic species withina sample solution electrolytic conductivity is used in many industries, particularly power generation, as a means of quality control and chemical dosing. It leads to increased efficiency, extended plant life and improved cost-effectiveness. Now, ABB Kent-Taylor's concept of dual inputs to a flexible microprocessoranalyser has given further impetus to electrolytic conductivity measurement by providing both technical and economic incentives for extending applications. Used, for example, in conjunction with 2155 series cation conductivity panels, the 4511/4521 instruments would enable 'before' and 'after' cation resin column measurements to be made--thus generating a cost saving of approximately 20% on the cost of the conductivity loops. Other typical applications include the monitoring of water softening, semi-conductor rinse tanks and the two-point monitoring of samples in critical processes. The 4511/4521 instruments are designed to provide accurate conductivity measurement over the ranges of 0 to 0.5 ~tS cm -~, up to a maximum of 10 000 ~tS cm -~. Precise ranging is determined by the user and the microprocessor, based on the cell constant and other data entered into the memory during the initial programming. Up to two fully isolated retransmission signals are available which may be configured for either a linear or logarithmic output of conductivity A, conductivity B, difference, or ratio measurements. Two blue filtered vacuum fluorescent displays facilitate easy reading of all parameters. An upper fivedigit display indicates the measured value, while a lower, 2t)-character dot matrix display unit provides user information during setting up and operation. This includes the cell constraints, reference temperature, temperature coefficients, alarm status and measured temperature. The instruments feature a non-volatile memory, linc voltage filtering and immunity against radio frequency interference.
New Rain-gauge Tippingbucket Cuts Costs In order to extend the life of existing rain-gauges and simplify the construction of new types, Thies-Clima have invented and produced a very innovative tippingbucket rain-gauge and data logging assembly which can be either incorporated into new instruments, or used to update rain-gauges previously thought to be totally unserviceable through age or mechanical failure. Designed to operate with standard World Meteorological Organization rain-gauge funnels, both from other manufacturers and including the Thies range, the unit renews and extends the life of rain-gauges, previously consigned to be scrapped. Additionally, the unit can provide data logging facilities in rain-gauge equipment previously only fitted with an on-off switching device. Constructed on a flat 4 mm steel baseplate of 178 mm diameter, the unit is simply fixed to the old rain-gauge base after removing all the existing fixings and mechanical parts. The data logger incorporates a 16 character LCD Display which shows date, time, precipitation of the day and the monthly total derived from a bucket with a precipitation resolution of 0.1 mm capacity. A ring memory provides permanent data over a recording cycle span of 62 days. The unit is easily set up and operated by means of two push-buttons on the datalogger case and is powered by four 1.5 volt highcapacity batteries which have a typical life of nine months. Other models shortly to be announced include
Thies-Clima Rain-gauge.
59
Dual Input Conductivity Transmitters A new electrolytic conductivity transmitter which features an advanced dual input capability for providing 'before' and 'after' comparative measurements in the treatment of water for industrial plants, has been developed by ABB Kent-Taylor. It is a high specification instrument and comes in two versions--the wall/ pipe-mounted Model 4511 and the panel-mounted Model 4521. Each has a two-cell input capability together with a facility for calculating the differential, or ratio, measurement between them. This ability to provide users with an 'at-a-glance' display of comparative conductivity readings from a single sample solution enables Models 4511/21 to do the work of two traditional instruments. Used in conjunction with ABB Kent-Taylor's range of conductivity cells, the new transmitters can also perform accurate and reliable monitoring operations. A measure of various charged ionic species withina sample solution electrolytic conductivity is used in many industries, particularly power generation, as a means of quality control and chemical dosing. It leads to increased efficiency, extended plant life and improved cost-effectiveness. Now, ABB Kent-Taylor's concept of dual inputs to a flexible microprocessoranalyser has given further impetus to electrolytic conductivity measurement by providing both technical and economic incentives for extending applications. Used, for example, in conjunction with 2155 series cation conductivity panels, the 4511/4521 instruments would enable 'before' and 'after' cation resin column measurements to be made--thus generating a cost saving of approximately 20% on the cost of the conductivity loops. Other typical applications include the monitoring of water softening, semi-conductor rinse tanks and the two-point monitoring of samples in critical processes. The 4511/4521 instruments are designed to provide accurate conductivity measurement over the ranges of 0 to 0.5 ~tS cm -~, up to a maximum of 10 000 ~tS cm -~. Precise ranging is determined by the user and the microprocessor, based on the cell constant and other data entered into the memory during the initial programming. Up to two fully isolated retransmission signals are available which may be configured for either a linear or logarithmic output of conductivity A, conductivity B, difference, or ratio measurements. Two blue filtered vacuum fluorescent displays facilitate easy reading of all parameters. An upper fivedigit display indicates the measured value, while a lower, 2t)-character dot matrix display unit provides user information during setting up and operation. This includes the cell constraints, reference temperature, temperature coefficients, alarm status and measured temperature. The instruments feature a non-volatile memory, linc voltage filtering and immunity against radio frequency interference.
New Rain-gauge Tippingbucket Cuts Costs In order to extend the life of existing rain-gauges and simplify the construction of new types, Thies-Clima have invented and produced a very innovative tippingbucket rain-gauge and data logging assembly which can be either incorporated into new instruments, or used to update rain-gauges previously thought to be totally unserviceable through age or mechanical failure. Designed to operate with standard World Meteorological Organization rain-gauge funnels, both from other manufacturers and including the Thies range, the unit renews and extends the life of rain-gauges, previously consigned to be scrapped. Additionally, the unit can provide data logging facilities in rain-gauge equipment previously only fitted with an on-off switching device. Constructed on a flat 4 mm steel baseplate of 178 mm diameter, the unit is simply fixed to the old rain-gauge base after removing all the existing fixings and mechanical parts. The data logger incorporates a 16 character LCD Display which shows date, time, precipitation of the day and the monthly total derived from a bucket with a precipitation resolution of 0.1 mm capacity. A ring memory provides permanent data over a recording cycle span of 62 days. The unit is easily set up and operated by means of two push-buttons on the datalogger case and is powered by four 1.5 volt highcapacity batteries which have a typical life of nine months. Other models shortly to be announced include
Thies-Clima Rain-gauge.
59