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Matt Riley

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  1. NRG IceFreeIII sensors are designed to be run with the heater connected at all times. There are several reasons for this: 1) All calculations regarding the accuracy of the transfer function are performed with the heater on. 2) The heater, once the sensor gets to temperature, is variable, and only draws what power it needs to maintain the temperature. 3) The internal mechanisms, including the bearings, are designed to function optimally when heated. 4) Heating helps eliminate the possibility of moisture contamination within the sensor, which can lead to shorts and oxidation. 5) If the heater gets disconnected, it is highly probable, and historically well documented, that it may not get reconnected prior to an unforeseen icing event. 6) Connecting the heater does alter the reaction time and threshold of the sensor, resulting in better low speed readings.
  2. The #40C and #40H Anemometers feature drainage ports in the base of the sensor within the boom mounting tube. Exposure to water and moisture is a given in most anemometer field applications. As long as the sensor is allowed to properly drain, this should not affect the sensor's capabilities. However, if a solid post boom is used, the drainage ports can become blocked, preventing proper sensor drainage. NRG recommends mounting #40 Anemometers on hollow booms to allow for drainage.
  3. After a great deal of trial and error, NRG Systems has determined that Digicel's network in the Turks & Caicos Islans supports GSM iPack communications. We were unable to establish a successful connection utilizing Cable & Wireless. The functional APN: web.digiceltci.com
  4. Thanks for the question Keith! One of the first troubleshooting steps you should take with your Symphonie logger is to view the data your logger successfully recorded before it stopped working. After opening the last data file with Symphonie Data Retriever software click the Read Data button and then select the volts/temperature option from the view menu. These two graphs reflect the internal temperature of your logger and its voltage.If your Logger is connected to an NRG iPack the volts should be a straight line at 2v. If not, the graph reflects your Logger's battery charge, which I'm guessing may have dropped significantly. If your battery voltage drops too low, your logger will not be able to properly record data and should have its batteries replaced immediately. If changing the batteries does not solve your issue, the next step should be to contact NRG Tech Support at Support@NRGSystems.com to arrange a repair diagnosis. -Matt
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