Differences

This shows you the differences between two versions of the page.

--- projects:lasercutterfilterpdmonitor [2019/01/14 05:14]
branth [Readings]
+++ projects:lasercutterfilterpdmonitor [2024/01/08 13:35] (current)
branth [Readings]
@@ Line 1: / Line 1: @@
 ====== Laser Cutter Exhaust Filter Pressure Drop Monitor ======
-{{:projects:pdmonitor:1209181829b.jpg?100|}}
+{{:projects:pdmonitor:pxl_20230813_171245724.jpg?200|}}
-{{:projects:pdmonitor:1212181917.jpg?200|}}
+{{:projects:pdmonitor:pxl_20230813_171250060.jpg?200|}}
-{{:projects:pdmonitor:1125181043.jpg?200|}}
 ===== Purpose =====
   * Monitor the performance and effectiveness of filters
@@ Line 10: / Line 9: @@
   * Built/tested 11/25/18
   * Installed 12/09/18
+  * Removed ???
+  * Revamped 7/27/23
 ===== Readings =====
 ^ Date  ^ Stage 1 PD  ^ Stage 2 PD ^ Stage 3 PD ^ Comments ^
@@ Line 17: / Line 18: @@
 |01/02/19|    0.22    |    1.20    |    0.62    | |
 |01/12/19|    0.28    |    1.16    |    0.32    | Markus changed out the Stage 1 filter |
+|01/15/19|    0.31    |    1.12    |    0.78    | |
+|01/20/19|    0.18    |    1.15    |    0.32    | |
+|01/23/19|    0.44    |    1.12    |    0.31    | |
+|02/07/19|    0.66    |    1.13    |    0.34    | |
+|03/02/19|    1.37    |    1.13    |    0.32    | |
+|03/08/19|    1.45    |    1.16    |    0.30    | |
+|03/10/19|    0.96    |    1.20    |    0.23    | Brant changed out the Stage 1 filter |
+|03/14/19|    0.98    |    1.16    |    0.31    | |
+|03/22/19|    1.07    |    1.17    |    0.35    | |
+|03/22/19|    1.01    |    1.25    |    0.22    | Markus replaced the Stage 1 filter with a 12" deep model |
+|05/10/19|    1.14    |    1.22    |    0.32    |
+|07/11/19|    1.78    |    0.00    |    0.32    | Stage 2 removed? |
+|07/21/19|    1.80    |    0.00    |    0.30    |  |
+|08/25/19|    1.85    |    0.00    |    0.30    |  |
+|10/27/19|    1.99    |    0.28    |    0.60    | |
+|01/26/20|    2.15    |    0.27    |    2.59    | Wood floor installed, room rearranged|
+|?|    ?    |    ?    |    ?    | Removed|
+|07/27/23|    0.25    |    0.03    |    0.00    | Revamped, no can filter |
+|08/13/23|    0.27    |    0.06    |    0.00    |  |
+|09/02/23|    0.17    |    0.01    |    0.01    | Before leaks in flex ducts were found |
+|09/02/23|    0.18    |    0.01    |    0.24    | After leaks fixed |
+|09/09/23|    0.27    |    0.27    |    0.30    | All new filters installed |
+|09/10/23|    0.27    |    0.28    |    0.35    |  |
+|10/07/23|    0.27    |    0.27    |    0.05    | Can filter removed |
+|10/15/23|    0.41    |    0.28    |    0.15    | New can filter with cloth cover |
+|12/09/23|    1.32    |    0.28    |    0.25    | Tubing swapped incorrectly, now fixed |
+|12/28/23|    1.25    |    0.28    |    0.25    | |
+|01/05/24|    1.22    |    0.28    |    0.25    | |
+|01/07/24|    0.05    |    0.28    |    0.25    | Raymond cleaned the filters during SID, Brant connected new ductwork |
 All values measured in inches of water column (in.w.c.)\\
-The analog signals read the following when no air is flowing (Stg1=-0.26, Stg2=-0.28, Stg3=-0.24)\\
+The signals used to read this when no air was flowing (Stg1=-0.26, Stg2=-0.28, Stg3=-0.24)\\
-Analog signal correction factors are not included in the code just yet because I am le tired\\
+Signal calibration factors are now included in the programming\\
 ===== Design/Construction =====
   * Designed/built by [[members:brantholeman|BrantH]]
   * Uses three differential pressure transducers, 5 VDC, 20 mA
-      * [[https://www.sciplus.com/5vdc-fluid-pressure-sensors-62817-p|American Science & Surplus #46251P2]]
+      * [[https://sciplus.com/5vdc-fluid-pressure-sensors-pkg-2/|American Science & Surplus #    SZZ99946251P0002]]
       * [[http://www.kavlico.com/kavlico-pressure/pressure-products/silicon-capacitive-pressure-sensors/p992|Kavlico P992-5008 series silicon capacitive sensor]]
   * Custom shield (a very crappy perforated board with several wire/solder connections)
@@ Line 82: / Line 112: @@
 double PDB = 0;
 double PDC = 0;
+int lifeA = 0;
+int lifeB = 0;
+int lifeC = 0;
 const int numReadingsA = 10;
@@ Line 102: / Line 137: @@
 void setup() {
   for (int thisReading = 0; thisReading < numReadingsA; thisReading++) {
@@ Line 117: / Line 149: @@
   lcd.begin(20, 4);
   // Print a message to the LCD.
-  lcd.print("Filter PD Monitor   ");
-  lcd.print("Stage2: ");
+  lcd.setCursor(0, 0);
-  lcd.print(PDB);
+  lcd.print("Filter Life Monitor");
-  lcd.print(" in.w.c.");
-  lcd.print("Stage1: ");
+  lcd.setCursor(0, 1);
+  lcd.print("Base:");
   lcd.print(PDA);
-  lcd.print(" in.w.c.");
+  lcd.print(" ");
-  lcd.print("Stage3: ");
+  lcd.print(lifeA);
+  lcd.print("% loaded");
+  lcd.setCursor(0, 2);
+  lcd.print("HEPA:");
+  lcd.print(PDB);
+  lcd.print(" ");
+  lcd.print(lifeB);
+  lcd.print("% loaded");
+  lcd.setCursor(0, 3);
+  lcd.print("Can:");
   lcd.print(PDC);
-  lcd.print(" in.w.c.");
+  lcd.print(" ");
+  lcd.print(lifeC);
+  lcd.print("% loaded");
+  //adjust for sensor calibration
+  PDA = abs((averageA / 1023.00 * 5.00) - 0.27);
+  PDB = abs((averageB / 1023.00 * 5.00) - 0.28);
+  PDC = abs((averageC / 1023.00 * 5.00) - 0.25);
   // SENSOR A
   // subtract the last reading:
@@ Line 143: / Line 194: @@
   // calculate the average:
   averageA = totalA / numReadingsA;
   // SENSOR B
@@ Line 160: / Line 212: @@
   averageB = totalB / numReadingsB;
   // send it to the computer as ASCII digits
     // SENSOR C
@@ Line 177: / Line 230: @@
   averageC = totalC / numReadingsC;
   // send it to the computer as ASCII digits
+  //end of life filter section pressure drops
+int deadA = 200; //can filter
+int deadB = 150; //HEPA
+int deadC = 80; //entry
+  // estimate remaining life
+  lifeA = (PDA*100 / deadA) * 100;
+  lifeB = (PDB*100 / deadB) * 100;
+  lifeC = (PDC*100 / deadC) * 100;
-  PDA = (averageA / 1023.00 * 5.00);
-  PDB = (averageB / 1023.00 * 5.00);
-  PDC = (averageC / 1023.00 * 5.00);
   delay(1000);
 }
 </code>
+Old photos:\\
+{{:projects:pdmonitor:1209181829b.jpg?100|}}
+{{:projects:pdmonitor:1212181917.jpg?200|}}
+{{:projects:pdmonitor:1125181043.jpg?200|}}

Milwaukee Makerspace Wiki

User Tools

Site Tools

Differences

Page Tools