ADXL1003Z self-test

Hello, I am Darshan, bought a new ADXL1003Z. I am using both Arduino and DAQ for evaluating the sensor. First, I did the self-test by providing 5V at Vdd and removed it, and connected it to the self-test pin. The self-test delta value is coming out to be 360mV but should be around 85mV, as mentioned in the datasheet. Is the sensor defective? Can you help me out what might be wrong?

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