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EVAL-AD5941BATZ can't work correctly

I use EVAL-AD5941BATZ to calculate the EIS of Lithium iron phosphate battery. But some problems have occurred.  I connect F+ and S+ to the positive pole of the battery and connect F- and S- to the negative pole of the battery. The first problem is that Analog  Devices SensorPal will flash back when drag Battery Impedance tool into the work area. The second problem is that the EIS figure is not correct, it should be a curve. Please help me, thanks!