Territory Stories

Electronic Data Collection and Analysis System



Electronic Data Collection and Analysis System


Yin Foo, Des; Foley, Margaret


E-Publications; PublicationNT; E-Books; Report ; 39/1992




Made available via the Publications (Legal Deposit) Act 2004 (NT).





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Power and Water Authority

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Report ; 39/1992

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Technical Report WRD92039 Viewed at 15:07:17 on 29/07/2010 Page 68 of 192. dynamic water level tests, up to SOrum. In-field testing of the 10m unit indicated there to be a maximum difference of IGGrum compared to the manually observed water levels during the 6 week trial period. The internal clock maintained accurate timing. 'rhere is no facility direct interrogation of function lS discontinued for monitoring battery status nor water level unless the logging (ie. the loggers current reading cannot be checked unless logging is ceased) . This facility is required since confirmation of the loggers operation (including bat.tery status) and the need for calibration correction should be checked during each site visit. iii) Cherryville Logger. The only trial conducted on this logger "laB concurrent to the Wesdata field trial. A 10m vented Hindata transducer ,vas attached to the logger for this test. The logger failed due to battery problems after 37 days. Compared to manually observed data, the maximum error in water levels was I50nun. 4.2.2 Suitability and Application (i) Wesdata Logging System. The system is purpose built for !50rum boreholes and external housing is not necessarily required for security of installation if adequate fixture is made at the borehead. However, a major design fault is the bouyanc.l of the unit (which should be designed to sink). A lead weight of approximately 1 kg was attached to the end of the unit. specific cable lengths for each bore need to be determined beforehand and made to order since cutting and joining of the cable is not the cable is only permitted feasible. That is termination of at either end. The t.ype of cable used is not preferred since it does not tolerate axial torsi.on. An u'Tvlarranted amount of care is therefore needed to

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