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 146 of 192. C2 STANDARD 1l,CCURACY AND RESPONSE TEST C2.1 INTRODUCTION A standard test has been devised the accuracy and responsiveness of equipment in controlled conditions. to assess and compare water level measuring The test is carried out in a well, with the transducer being moved through the Iflater, and is done in three stages to find : I II accuracy within transducer range; accuracy outside transducer range; responsiveness of system to change in water level. The over-range accuracy is recorded because the transducer may be over-ranged for short periods from which data may be important (e.g. in first few minutes of recovery after a pump test). The transducer can only be immersed to a depth inside its' specified "overpressure" range (i. e. the depth to which it can be immersed without affecting its' calibration or response). Since it is possible that the calibration may be affected by going outside the specified linear range (even while, remaining stage I mus': over-ranged. within the specified allowable overpressure), be completed before the transducer is Readings are taken With the transducer exposed to normal operating water temperature and pressure conditions; At a number of depths throughout the transducer range, to allow for non-linearity; FIt the same depths at non-repeatability, and after different times, approaching those both above and below, to allow for hysterisis. to allow depths for from }lore than one probe of the same range can be tested

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