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 56 of 192. - A date and time anomaly was detected at midnight. This caused a misreading of data when the 'LOGIN' processor was utilised. This has since been rectified. The software available is not guaranteed to provid,= a faithful record of downloaded data. Anomalies could possibly occur (at random) due to the logger/laptop data transfer process. eliminate this Provision of an possibility. It echo checking routine would is common that data is "missed" or misread in any data transfer process (including modems) and echo checking should be a matter of course. The software required for this is known to be available in other non-standard vElrsions and is called 'checksum'. This may be made available by negotiation at extra cost. Channel 3 or 4 could not be activated unless Channels 1 and 2 were also activated. This was expected to be a problem since logger input channels are dedicated to specific transc.ucers. This has since been rectified. The choice of logging interval is limited to either fixed interval or significant event. A desirable addition would be a logarithmic time scale for recording. The system of venting through the logger is questioned. Termination of the vent is at the plug and provision has been made to vent internally. However, the box is claimed to be at least watertight. (ie. IP67) iii) Tornms Data Logger. (4 analogue input, 12 channels per input) This logger is currently the foundation of the electronic data acquisition system for hydrographic data. The system has been implemented reliabili ty n,eeds to be section. since 1988 and some comment on the obtained from the Hydrographic )l,ccuracy tests were not conducted since it was assumed that its resolution was within the available tolerance of the transducers to be attached. Similarly to the Mindata logger, it is recommended that temperature effects be checked under controlled conditions.
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