Changes between Version 12 and Version 13 of Hardware/dInfrastructure/qPowerMeasurment

Timestamp:

Aug 23, 2013, 10:20:03 PM (11 years ago)

Author:

pavan717

Comment:

—

Hardware/dInfrastructure/qPowerMeasurment

@@ -52 +52 @@
 
 '''Procedure:''' 
-   1) Connect the Arduino Board and Arduino Ethernet Shield to the ORBIT Power Sensing Platform. The Arduino board will be connected to the bottom of the ORBIT Power Sensing Platform and the Arduino Ethernet Shield will be place on the top of the ORBIT Power Sensing Platform as shown below:
+   1) Connect the Arduino board and Arduino Ethernet Shield to the ORBIT Power Sensing Platform. The Arduino board will be connected to the bottom of the ORBIT Power Sensing Platform and the Arduino Ethernet Shield will be place on the top of the ORBIT Power Sensing Platform as shown below:
 
 || [[Image(board.PNG, 400px)]] ||
@@ -59 +59 @@
 [[BR]] 
    2) Upload the following code to the Arduino board from the attachments: {{{PowerSensingCode.ino}}} Note: MAC & IP Address will have to be changed for future       
-      sensors along with AD737JNZ chip off-set for each pin and proper toroid scaling ratio. [[BR]]
+      sensors along with AD737JNZ chip off-set for each analog pin and proper toroid scaling ratio. [[BR]]
    3) Calculations inside the code: [[BR]]
      {{{
@@ -78 +78 @@
       which are in double datatype.[[BR]] 
 {{{((((sensorReading/1024.0)*1100.0)/4.700)+2.468)}}}[[BR]] 
-      First convert the resolution reading into voltage reading by taking the 
-      ratio of the resolution reading and multiplying it by 1100mV internal Arduino voltage. Then by dividing the inverting amplifier gain of 4.7 and adding the 
-      AD737JNZ chip off-set of 2.468mV gives us a final voltage reading of the input signal.  The off-set for the AD737JNZ chip was calculated individually for 
-      each analog pin by testing 10 different AC signals and measuring the input and output for AD737JNZ chip.                     
+      First convert the resolution reading into voltage reading by taking the ratio of the resolution reading and multiplying it by 1100mV internal Arduino 
+      voltage. Then by dividing out the inverting amplifier gain of 4.7 and adding the AD737JNZ chip off-set of 2.468mV gives us a final voltage reading of the 
+      input signal. The off-set for the AD737JNZ chip was calculated individually for each analog pin by testing 10 different AC signals and measuring the input
+      and output of the AD737JNZ chip.[[BR]]
+ 
+|| [[Image(IndepPinOff-Set.PNG, 600px)]] ||
+|| Figure : Chip Off-Set  || 
+[[BR]]
+     
+      To view rest of the off-sets download {{{Off-Set-Chart.xlsx}}} from the attachments. The next step is to convert this voltage reading to a current 
+      reading by dividing the voltage by 42Ω.  Now the current has to be scaled back again by applying the inverse ratio of 40A to 26.23mA to the code and
+      lastly converting the proper current reading to a power reading by the applying the following equation: P = R* (I)^2.[[BR]]  
+
+   4)Use PuTTY Pageant Software to double tunnel to the ORBIT Network and then
+
+
+