As shown in the diagram attached, I am tapping sensor signal from a machine using USB1808 DAQ and the DAQ is connecting to a CPU through USB cable. In normal situation, the sensor reading should display 0. However, when my CPU is shut down (DAQ is not power ON), the sensor reading become negative value (approx -10). When CPU is turning on back (DAQ is powered ON), sensor reading back to normal (e.g. 0). Is there any method we can channel power directly to the USB1808 DAQ instead of using power source through USB cable? Or do we have any method which can avoid this problem through any circuit connection solution?
Question
Ricky Ooi
As shown in the diagram attached, I am tapping sensor signal from a machine using USB1808 DAQ and the DAQ is connecting to a CPU through USB cable. In normal situation, the sensor reading should display 0. However, when my CPU is shut down (DAQ is not power ON), the sensor reading become negative value (approx -10). When CPU is turning on back (DAQ is powered ON), sensor reading back to normal (e.g. 0). Is there any method we can channel power directly to the USB1808 DAQ instead of using power source through USB cable? Or do we have any method which can avoid this problem through any circuit connection solution?
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