SunSPec 5 - Telemetry System

Voltage Transducer: Initial Testing We went to the workshop to experiment with the voltage transducer. The Voltage Transducer that is currently being experimented with is the CR5310 of the CR5300 Series. Figure 1: Voltage Transducer Figure 2: Set-up Configuration The voltage transducer receives a High Voltage input and scales it down, converting it to a Low Voltage output. The input range can take up to a range of 0 - 150V to return output from 0 - 5V for CR5310,  It isolates the LV output from the HV input. We proceeded to test it out to determine it's sensitivity. Ideally, the input of 150V would result in a 5V output and that the relationship between the input and output is linear. Thus we can calculate the gradient of the relationship between Vin and Vout to be y=30x. (where y=Vin, x= Vout). However, we weren't given the exact coefficient of the gradient for its' sensitivity, hence we need to test it out. ...

Week 2 A simple voltage sensing circuit is built by making use of the voltage divider theorem, whereby  Vout = [ {R2 / (R1+R2)] * Vin ]. We had previously experimented with this circuit where R1 is of value 980K while R2 is of value 10K, the voltage display was more inaccurate from the calculated voltage output as the accuracy was around  +/- 1V, as compared to the current accuracy of  +/- 0.4V . We begin experimenting and replaced the R1 with the value of 100K, only then did the circuit start displaying more accurate Voltage values.                     Figure 1: Voltage Divider Theorem Figure 2: Voltage Sensing Circuit The circuit is tested with a voltage output of 5V from the DC Power Supply, 4.72V is then being sensed by the circuit. Whereas for a voltage of 10V, a 9.49V is being sensed. This shows that the circuit is only accurate up to a certain extent, and can be improved.  ...