XICOY JM-CGMBASIC User Manual
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Contents | 
4Basic operation:This instrument allows to do several measures, and to do so, it needs to know somedata from your plane. Depending on your needs, some of the data is not necessary tobe entered. We will describe step by step the measures that can be done, the data tobe entered to do these measures and how to take these measures.Measuring the weight:To measure the weight, it is notnecessary to enter any data, but it isimportant to check and calibrate thesensors, especially if they have gotmechanical stress, like transport orshock, if the temperature is significantlydifferent since last calibration, or atleast once per year. See the section of“sensor calibration” for details.First place the scales and the plane over a flat and hard surface. Don’t put the planeover the scales yet. First connect the battery, connect the terminal to the Wi-Fi serveras described above, and the touch the “Tare” button, toset all 3 scales to zero. If the ambient temperature issignificantly different (i.e., the instrument has beeninside a car in the sun and is hotter than ambienttemperature), then wait few minutes so that the sensorsequalize its temperature to avoid a measure drift later.Once the tare is complete and all 3 scales are at zero,place the plane over the scales. Check that the wheelsare centered over the sensors and don’t make any forcesideways that could distort the measure of the realweigh, if landing gear has some play, it is easy to pushone leg against the other, causing the scales to sit atangle and generating instability and errors.Now you can read on the terminal the weight on eachsensor and the total weight. All data is displayed inMetric and imperial units at same time.Measuring the current CG position:OK, now we know the weight of our plane and we know that it weights a little more onleft side that on right side. Now we can measure where the CG actually is.First of all, and this is really IMPORTANT, the plane should be always placed in levelflight. Not useful to balance the plane with its nose pointing up or down, when duringin flight, the plane will not fly in the position you have balanced it. |
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