http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0231609-A3
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S210-90 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N27-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01R27-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N27-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N33-18 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01R27-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N33-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N27-06 |
| filingDate | 1986-11-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1987-10-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-0231609-A3 |
| titleOfInvention | Pure water conductivity sensor |
| abstract | A multiple electrode conductivity sensor generates an noutput to be applied to a special temperature compensation nsystem that responds to a temperature sensor signal indicantive of the sample water temperature. The temperature signal nselectively operates a memory unit that contains separate nwater and salt correction values to be used in adjusting the nmeasured conductivity output. The water correction value renpresents the conductivity of absolutely pure water at the nmeasured temperature, and this value can be subtracted nfrom the measured total conductivity to produce a connductivity value attributable only to salt impurities. The salt ncorrection signal from the memory unit is then used to scale nthe measured salt conductivity signal at the standard refernence temperature of 25°C, thereby achieving a corrected salt nconductivity measurement that can be added to a fixed pure nwater correction signal representative of the conductivity of npure water at that temperature. The sum of these values nyields an adjusted output signal that accurately reflects the nconductivity (or resistivity) of the pure water solution at the nstandard 25°C temperature. To avoid inaccuracies due to elnectrode deposits, the excitation voltage applied across the ncurrent electrodes of a four electrode conductivity sensor is nmonitored to produce a warning whenever the sensor circunitry nears the limit of its ability to overcome the effect of acncumulated deposits, thus alerting the operator to the need for ncleaning the electrodes before substantial inaccuracies can noccur. |
| priorityDate | 1985-12-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 18.