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test-and-measurement:analog-discovery-pro-5250:power-measurement-demo [2021/09/25 16:29] – Keith M Kolmostest-and-measurement:analog-discovery-pro-5250:power-measurement-demo [2022/10/04 11:38] (current) – external edit 127.0.0.1
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 ===== Inventory ===== ===== Inventory =====
-  * Analog Discovery Pro with:+  * Analog Discovery Pro (ADP5250) with:
     * 2 BNC oscilloscope probes     * 2 BNC oscilloscope probes
     * A BNC to minigrabber clip cable     * A BNC to minigrabber clip cable
-  * Analog parts and wires (found in the Analog Parts Kit):+  * Analog parts and wires (found in the [[https://digilent.com/shop/analog-parts-kit-by-analog-devices-companion-parts-kit-for-the-analog-discovery/|Analog Parts Kit]]):
     * A 470 Ω resistor     * A 470 Ω resistor
     * A 4.7 nF capacitor     * A 4.7 nF capacitor
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     * A breadboard     * A breadboard
   * WaveForms Installation, version 3.15.18 or later   * WaveForms Installation, version 3.15.18 or later
-    * [[https://mautic.digilentinc.com/waveforms-download|Download]] 
  
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 +{{:test-and-measurement:analog-discovery-pro-5250:top.png?600 |}}
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 The power across the resistor can be calculated as well. To do so, the voltage across the sensing resistor is subtracted from the voltage across both resistors (Channel 2 Position 2), and the result multiplied by the current passing through the resistor. The power across the resistor can be calculated as well. To do so, the voltage across the sensing resistor is subtracted from the voltage across both resistors (Channel 2 Position 2), and the result multiplied by the current passing through the resistor.
  
-**Add** another Math channel, this time with the calculation of "(C2-C1)*C1/Rs". If the chart is too cluttered with signals, click the checkmarks in the upper left of the 3 Scope channels to stop them from being plotted. Set the units to "W" and adjust the range of this channel to 20 mW/div to view the power of the resistor component of the circuit. Select Math1 and then drag the red triangle on the left of the chart down to offset the channel from Math2, since they largely overlap.+**Add** another Math channel, this time with the calculation of "(C2-C1)*C1/Rs". If the chart is too cluttered with signals, click the checkmarks in the upper left of the 2 Scope channels to stop them from being plotted. Set the units to "W" and adjust the range of this channel to 20 mW/div to view the power of the resistor component of the circuit. Select Math1 and then drag the red triangle on the left of the chart down to offset the channel from Math2, since they largely overlap.
  
 Note: Scope measurement and math channels can be renamed and relabeled in order to clarify what they represent. This can be done by expanding the channel options (the gear icon) and editing the Name and Label properties of the channel. Note: Scope measurement and math channels can be renamed and relabeled in order to clarify what they represent. This can be done by expanding the channel options (the gear icon) and editing the Name and Label properties of the channel.
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-The capacitor power can also be calculated, by subtracting the voltage across both resistors from the total voltage across the circuit and multiplying the result by the current passing through the circuit. +To see the average value of each power measurement, click "View" in the top toolbar, then "Measurements". In the Measurements panel, click the "Add" button then "Defined Measurement". Select Math1 in the left panel, expand Vertical in the right then click Average. Click "Add", then repeat for Math2. Once done, click "Close".
- +
-**Add** one last Math channel with the calculation "(C2 - C3)*C1/Rs", set the units to "W" and adjusting the range accordingly (1 mW/div). This Math channel shows the power of the capacitor component of the circuit. +
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-{{reference:test-and-measurement:analog-discovery-pro-3x50:capacitor-power-math-channel-adj.png?600|}} +
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-Math3 is noisy but by averaging the signals across multiple measurements this can be reduced. To do so, expand the "Advanced Options" underneath the Time base and select 10 from the Average dropdown. +
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-To see the average value of each power measurement, click "View" in the top toolbar, then "Measurements". In the Measurements panel, click the "Add" button then "Defined Measurement". Select Math1 in the left panel, expand Vertical in the right then click Average. Click "Add", then repeat for Math2 and Math3. Once done, click "Close".+
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-{{reference:test-and-measurement:analog-discovery-pro-3x50:measurement-averages.png?600|}}+{{:test-and-measurement:analog-discovery-pro-5250:average.png?600 |}}
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 ===== Other Resources ===== ===== Other Resources =====
  
-For more guides and example projects for your Analog Discovery Pro, please visit its [[start|Resource Center]].+For more guides and example projects for your Analog Discovery Pro (ADP5250), please visit its [[start|Resource Center]].
  
 For technical support, please visit the [[https://forum.digilentinc.com|Digilent Forums]]. For technical support, please visit the [[https://forum.digilentinc.com|Digilent Forums]].