Autonomous Data Collector DCX-16 (VG, SG)
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Catalog excerpts

Autonomous Data Collector DCX-16 (VG, SG) - 1

Autonomous Data Collector smallest diameter The DCX-16 is an autonomous, battery-powered data collector in a stainless steel housing with a very small diameter of only 16 mm. The housing and the pressure sensor element are completely welded in, so sealing rings are eliminated at this point. In applications where a small probe diameter is an advantage, the logger can record the water level (pressure) and the tempe-rature over long periods. As well as the battery compartment with its double seal, the small-diameter (16 mm) submersible sensor includes electronic circuitry featuring the latest microprocessor technology. It records the pressure and temperature of the medium with high measurement accuracy and resolu-tion, and it uses a mathematical model to correct any linearity or temperature errors made by the pressure sensor. High data reliability is guaranteed thanks to the use of a nonvolatile data memory. The various configuration options allow the data logger to be adapted to the measuring point so that only specified events will be detected and stored. Event-controlled recording and log-interval recording can be set independently of one another. In addition, installation data and comments on the measuring point can be stored in the logger. Installation is fast and simple with fixing disks of various sizes which can be fitted as options: these match locking units (caps) from different manufacturers for levels of 1” or more (2” or more with light plummet aperture), so measuring points can be implemented at a fraction of the previous cost. Three versions of the data collector are available: DCX-16 The sensor, electronics and battery are accommodated in one housing. To extract data, the data collector must be removed from the measuring point, and the watertight screw cap that allows access to the read-out plug/interface must be unscrewed. The DCX-16 operates with an absolute pressure sensor. In shallow water, when the influence of air pressure fluctuations has to be taken into account, a second logger (barometric logger, obtainable separately) positioned on the surface of the water must be used to record the air pressure progression. The com-puter software then calculates the differential pressure or the water level by subtracting the two measured data. DCX-16 SG/VG Instead of a watertight screwed closure, these versions have a cable output. The interface plug is fixed on the sounding tube above the surface of the water with the help of a screw-on fixing disk. This means that there is no need to remove the DCX-16 SG/VG from the sounding tube in order to read the data. In the VG version (reference pressure measurement), the reference pressure-compensating capillary is routed in the same cable into the read-out plug housing; this also contains the reference aperture (protected by a Gore-Tex® diaphragm) which produces the pressure equalization. Thread for screw-on fixing disks Venting Holes for VG-Version Mark of the diaphragm position on the level sensor KELLER AG für Druckmesstechnik CH-8404 Winterthur +41 52 235 25 25 info@keller-druck.com Screw cap/ interface plug KELLER Ges. für Druckmesstechnik mbH D-79798 Jestetten +49 7745 9214 0 eurocenter@keller-druck.com Electronics- resp. battery housing Mark of the diaphragm position on the level sensor Edition 08/2013 Subject to alterations Companies approved to ISO 9001 www.kell

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Autonomous Data Collector DCX-16 (VG, SG) - 2

□ KELLER Specifications Pressure Ranges PAA: Absolute. Zero at vacuum PR: Vented Gauge. Zero at atmospheric pressure (other ranges on request) *The system length can be selected (optional); for lengths of 100 m or more, use an anchor clamp. Tolerance for system length: < 10 m: ± 2 cm; > 10 m: ± 1% of system length Supply Lithium battery 3,6 V (Type AAA) Battery Life 3 4 years @ 1 measurement/hour Output RS 485 digital Electrical Connection Fischer DEE 103A054 Pressure Sensor Specifications Comp. Temperature Range Accuracy Error Band 4 (-10.40 °C) Resolution Long Term Stability...

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