1. assembly of conductivity flow loop living with the lab (in preparation for calibrating conductivity sensor)

2. living with the lab 2 The content of this presentation is for informational purposes only and is intended only for students attending Louisiana Tech University. The author of this information does not make any claims as to the validity or accuracy of the information or methods presented. Any procedures demonstrated here are potentially dangerous and could result in injury or damage. Louisiana Tech University and the State of Louisiana, their officers, employees, agents or volunteers, are not liable or responsible for any injuries, illness, damage or losses which may result from your using the materials or ideas, or from your performing the experiments or procedures depicted in this presentation. If you do not agree, then do not view this content. The copyright label, the Louisiana Tech logo, and the “living with the lab” identifier should not be removed from this presentation. You may modify this work for your own purposes as long as attribution is clearly provided. DISCLAIMER & USAGE

3. living with the lab Mount Pump Drill pilot hole with #42 bit. Drill into a solid part of the pump. Orient the pump as shown with exit facing far side of system. Use 1” long, #6 sheet metal screw 3

4. living with the lab Wiring with 5V and 12V Power Bus Strips, the Conductivity Sensor and the LCD 12VDC from power supply 4 12VDC from power supply and into Vin and GND regulated power from 5V and GND pins to bus strips

5. living with the lab Wiring Tips + - 12VDC power supply pump 5VDC power from Arduino to upper and lower breadboards (use 22 gage wire & plug into 5V and GND pins) switch Use a 12VDC power supply capable of supplying 1.5A to power the pump, the heater and the solenoid valves. This schematic shows a switch to power the pump and a switch to power the bus strip on the right side of the breadboard. Adding these switches makes it more convenient to test and troubleshoot your system. We recommend that you power the Arduino and sensor circuits using a single 12VDC power supply. We will use diodes to diffuse back currents from the pump motor, relay coils, and solenoid coils. 5 12VDC power from power supply to lower and upper breadboards (use 22 gage solid core wire)

6. living with the lab Install Switch & Plug 6 use a larger wire here if a single wire carries the current for the pump, heater and valves positive supply power to be run to pump power to be run to breadboard power to be run to breadboard

7. living with the lab Other Views 7

8. living with the lab Other Views 8

9. living with the lab Other Views 9

10. living with the lab Other Views 10