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Victoria University Antarctic Research Expedition Science and Logistics Reports 2004-05: VUWAE 49

Programming

Programming

The Vibrating wire transducer is plucked and read every 10 seconds and an average value (from 60 readings) calculated every 5 minutes and recorded at the beginning of the next 5-minute interval. Six Barometric pressure readings are made between 2 and 3 minutes in the 5-minute interval and averaged and recorded with the tide value at the beginning of the next 5-minute interval. Time is recorded in UTC.

The transducer pressure value is converted to a seawater equivalent using a density value of 1.02825 for seawater with a salinity of 35 parts per thousand at a constant temperature of minus 1.8 degrees Celsius (freezing point).

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Instrumentation: Cape Roberts Tide Gauge @ 3 December 2002
Pressure Transducer: Geokon 4500 ALV SN 14740
Vibrating Wire transducer Interface: Campbell AVW1
Data logger: Campbell CR10X
Storage Module: Campbell SM4M 4 M Byte
Barometer: Vaisala PTB220 Class B, SN X3610009
Batteries: Sonnenschein A212/110A (3 total 330 Ahr)
Solar Panels: Solarex 20 W, two; 40 W total
Solar Regulator: Morningstar SS-10-12
Enclosure: Polythene Space Case 0944
Equipment Costs (Exclusive of GST)
Installed equipment value: $ 14,870.5
Servicing & Installation equipment: $ 2,793.5
Total: $ 17,664