An output of an analogue soil moisture sensor is ranged from 0 - 3.3 V based on the moisture measurement range from 0 - 100%. The sensor is connected to a PLC using its analogue input (ADC) channel. (a) Find an equation that shows the relationship between the moisture measurement range and the output voltage. (b) What is the resolution of the PLC ADC if the conversion is made based on 10-bit data

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An output of an analogue soil moisture sensor is ranged from 0-3.3 V based on the
moisture measurement range from 0-100%. The sensor is connected to a PLC using its
analogue input (ADC) channel.
(a) Find an equation that shows the relationship between the moisture measurement range
and the output voltage.
(b) What is the resolution of the PLC ADC if the conversion is made based on 10-bit data
and a reference voltage of 5 V?
(c) Identify the smallest moisture change (%) that the ADC can detect?
(d) Based on (b) find an equation that can be used to convert the digital data from the
ADC back to the moisture unit.
Transcribed Image Text:An output of an analogue soil moisture sensor is ranged from 0-3.3 V based on the moisture measurement range from 0-100%. The sensor is connected to a PLC using its analogue input (ADC) channel. (a) Find an equation that shows the relationship between the moisture measurement range and the output voltage. (b) What is the resolution of the PLC ADC if the conversion is made based on 10-bit data and a reference voltage of 5 V? (c) Identify the smallest moisture change (%) that the ADC can detect? (d) Based on (b) find an equation that can be used to convert the digital data from the ADC back to the moisture unit.
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