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| I had the same problem. I spoke with an engineer in California from DJ and they say they know about the issue and are working for a solution. He also said DJ flow meters are one of the few that have a very low cal factor (ie: not in the hundreds) so it makes them difficult to use with the 750. I did find out from the local Case dealer GIS tech that if you update your firmware for the Field IQ, the section and rate control modules, and the master switch module to v2.06; the accuracy goes way up. (The one I saw had v1.02 when it was new.) This firmware is appearently only available to Trimble dealers. Also, as a starting point, set valve gain to 5%, min response to 8%, and the allowable error to 2%.
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Trimble CFX-750 / NH3 Field IQ
