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).
Power and Water Authority
Report ; 39/1992
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Technical Report WRD92039 Viewed at 15:07:17 on 29/07/2010 Page 23 of 192. (iii) To provide an objective record of the performance of vClrious componentry in terms of accuracy, repeatability, calibration factors and responsiveness. 3.2.2 Description l'he tests were carried out in a facility which allowed full range access of the transducers in question, "accurate" manual measurement as a benchmark, and controllable conditions (see Plates 7 ",nd 8). The claimed accuracy of manual readings is to at least 10mm under static conditions and 20mm for dynamic. In the subsequent text, these readings will be termed "manuals". Two test scenarios termed "static" and "Drawdown" were conducted. is provided A comprehensive description of the test procedures in Appendix c. The static test is designed to check the system calibration, response time and accuracy under static (ie. non-moving water level) conditions. The transducer is moved through the wa'cer by an attached measuring tape giving direct manual measurenent of its depth which is then compared to the logged data. The Drawdown test is designed to gauge system accuracy in a pump test observation bore (OB ) or remote site monitoring bore situation in which the water level is dynamic. The transducer is placed in a well from which water is pumped at a reasonably steady rate using a submersible pump. 3.2.3 Results 220.127.116.11 Calibration 'I'here are a variety of calibration methods available (Methods I,II,III in Procedure"). It should Appendix be noted C "standard Calibration that although inaccurate calibration can later be corrected using a recalibration
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