Difference between revisions of "Team:Sherbrooke/Experiments"
Line 18: | Line 18: | ||
<hr> | <hr> | ||
<p> | <p> | ||
− | A <a href="#MC96 Thermal Experimentations">thermal experimentation </a> | + | A <a href="#MC96 Thermal Experimentations">thermal experimentation </a>has been the only experimentation done on the <i>MC96</i> module. |
</p> | </p> | ||
<span id="MC96 Thermal Experimentations"> </span> | <span id="MC96 Thermal Experimentations"> </span> | ||
Line 30: | Line 30: | ||
Thermal simulations have been done on the software COMSOL. These simulations have been used | Thermal simulations have been done on the software COMSOL. These simulations have been used | ||
to verify the heat transfer of the aluminium mold of the modules, thus helping us improve their | to verify the heat transfer of the aluminium mold of the modules, thus helping us improve their | ||
− | design. For the <i>MC96</i>, some | + | design. For the <i>MC96</i>, some simulation has been done on early design, but none on the final design, |
− | due to the | + | due to the impossibility to simulate heat pipes. |
</p> | </p> | ||
Line 42: | Line 42: | ||
<tr> | <tr> | ||
<td>Peltier element cooling power</td> | <td>Peltier element cooling power</td> | ||
− | <td> | + | <td>4X60W</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
<td>Peltier element heating power</td> | <td>Peltier element heating power</td> | ||
− | <td> | + | <td>4X250W</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
Line 86: | Line 86: | ||
<hr> | <hr> | ||
<h4>Simulation</h4> | <h4>Simulation</h4> | ||
− | + | <p> | |
+ | Thermal simulations have been done on the software COMSOL. | ||
+ | These simulations have been used to verify the heat transfer | ||
+ | of the aluminium mold of the modules, thus helping us improving | ||
+ | their design. For the MC1.5, many simulations have been done on different designs. | ||
+ | These are the simulation parameters for the latest design. | ||
+ | </p> | ||
<h5>Simulation parameters</h5> | <h5>Simulation parameters</h5> | ||
<table> | <table> | ||
Line 127: | Line 133: | ||
<h4>Trials protocols</h4> | <h4>Trials protocols</h4> | ||
<p> | <p> | ||
− | These are the protocol used to test the thermal | + | These are the protocol used to test the thermal characteristics of the <i>MC1.5</i> prototype. |
These protocols have been tested on a single sub-module of a <i>MC1.5</i> . | These protocols have been tested on a single sub-module of a <i>MC1.5</i> . | ||
</p> | </p> | ||
Line 165: | Line 171: | ||
to the Peltier element (PS vcc to Peltier gnd and PS gnd to Peltier vcc)</li> | to the Peltier element (PS vcc to Peltier gnd and PS gnd to Peltier vcc)</li> | ||
<li>Set the thermocouple probe at the bottom of the middle hole of the aluminium mold</li> | <li>Set the thermocouple probe at the bottom of the middle hole of the aluminium mold</li> | ||
− | <li>Wait for the thermometer measure to stabilize for 20 | + | <li>Wait for the thermometer measure to stabilize for 20 seconds</li> |
</ol> | </ol> | ||
Line 171: | Line 177: | ||
<ol> | <ol> | ||
<li>Set the voltage of the high current power supply to 1V</li> | <li>Set the voltage of the high current power supply to 1V</li> | ||
− | <li>Wait for thermometer measure to stabilize for at least 20 | + | <li>Wait for thermometer measure to stabilize for at least 20 seconds</li> |
<li>Note the thermometer measure and the voltage associated with it</li> | <li>Note the thermometer measure and the voltage associated with it</li> | ||
<li>Repeats set 1, 2 and 3 and increased the voltage by 1V each time until the thermometer measure is below the specified lower limit (0℃)</li> | <li>Repeats set 1, 2 and 3 and increased the voltage by 1V each time until the thermometer measure is below the specified lower limit (0℃)</li> | ||
Line 203: | Line 209: | ||
to the Peltier element (PS vcc to Peltier vcc and PS gnd to Peltier gnd)</li> | to the Peltier element (PS vcc to Peltier vcc and PS gnd to Peltier gnd)</li> | ||
<li>Set the thermocouple probe at the bottom of the middle hole of the aluminium mold</li> | <li>Set the thermocouple probe at the bottom of the middle hole of the aluminium mold</li> | ||
− | <li>Wait for the thermometer measure to stabilize for 20 | + | <li>Wait for the thermometer measure to stabilize for 20 seconds</li> |
</ol> | </ol> | ||
Line 209: | Line 215: | ||
<ol> | <ol> | ||
<li>Set the voltage of the high current power supply to 1V</li> | <li>Set the voltage of the high current power supply to 1V</li> | ||
− | <li>Wait for thermometer measure to stabilize for at least 20 | + | <li>Wait for thermometer measure to stabilize for at least 20 seconds</li> |
<li>Note the thermometer measure and the voltage associated with it</li> | <li>Note the thermometer measure and the voltage associated with it</li> | ||
<li>Repeats set 1, 2 and 3 and increased the voltage by 1V each time until the thermometer measure is over the specified upper limit (80℃)</li> | <li>Repeats set 1, 2 and 3 and increased the voltage by 1V each time until the thermometer measure is over the specified upper limit (80℃)</li> | ||
Line 246: | Line 252: | ||
<ol> | <ol> | ||
<li>Set the voltage of the high current power supply to reach 85℃</li> | <li>Set the voltage of the high current power supply to reach 85℃</li> | ||
− | <li>Wait for thermometer measure to stabilize for at least 20 | + | <li>Wait for thermometer measure to stabilize for at least 20 seconds</li> |
<li>Stop the high current power supply </li> | <li>Stop the high current power supply </li> | ||
<li>Invert connection between the Peltier element and the high current power supply</li> | <li>Invert connection between the Peltier element and the high current power supply</li> | ||
<li>Set the high current power supply to 15.5V (calculated by this <a href="#MethodCoolingVoltage">method</a>)</li> | <li>Set the high current power supply to 15.5V (calculated by this <a href="#MethodCoolingVoltage">method</a>)</li> | ||
<li>Start the chronometer when the thermometer measure reach 80℃</li> | <li>Start the chronometer when the thermometer measure reach 80℃</li> | ||
− | <li>For each 10℃ temperature drop, note the timestamp until | + | <li>For each 10℃ temperature drop, note the timestamp until 4℃ is reached</li> |
<li>Stop the high current power supply </li> | <li>Stop the high current power supply </li> | ||
<li>Invert connection between the Peltier element and the high current power supply</li> | <li>Invert connection between the Peltier element and the high current power supply</li> | ||
Line 289: | Line 295: | ||
<font color="#565656">Measurement</font> | <font color="#565656">Measurement</font> | ||
<ol> | <ol> | ||
− | <li>Set the voltage of the high current power supply to reach - | + | <li>Set the voltage of the high current power supply to reach -1℃</li> |
<li>Wait for thermometer measure to stabilize for at least 20 second</li> | <li>Wait for thermometer measure to stabilize for at least 20 second</li> | ||
<li>Stop the high current power supply </li> | <li>Stop the high current power supply </li> | ||
<li>Invert connection between the Peltier element and the high current power supply</li> | <li>Invert connection between the Peltier element and the high current power supply</li> | ||
<li>Set the high current power supply to 24V (Maximal voltage available for the Peltier element)</li> | <li>Set the high current power supply to 24V (Maximal voltage available for the Peltier element)</li> | ||
− | <li>Start the chronometer when the thermometer measure reach | + | <li>Start the chronometer when the thermometer measure reach 4℃</li> |
<li>For each 10℃ temperature rise, note the timestamp until 80℃ is reached</li> | <li>For each 10℃ temperature rise, note the timestamp until 80℃ is reached</li> | ||
<li>Stop the high current power supply </li> | <li>Stop the high current power supply </li> | ||
Line 306: | Line 312: | ||
<a href="#top_menu_under">Back to top</a> | <a href="#top_menu_under">Back to top</a> | ||
− | + | </br> | |
<span id="MC1.5 Magnetisation Experimentations"> </span> | <span id="MC1.5 Magnetisation Experimentations"> </span> | ||
<h3>Magnetisation experimentations</h3> | <h3>Magnetisation experimentations</h3> | ||
Line 320: | Line 326: | ||
<p> | <p> | ||
Determine if the neodymium magnets are powerful enough to attract the | Determine if the neodymium magnets are powerful enough to attract the | ||
− | microscopic magnetic beads on the side of the test tube within | + | microscopic magnetic beads on the side of the test tube within 5 minutes. |
</p> | </p> | ||
<font color="#565656">Material</font> | <font color="#565656">Material</font> | ||
Line 363: | Line 369: | ||
<hr> | <hr> | ||
<h4>Simulation</h4> | <h4>Simulation</h4> | ||
− | + | <p> | |
+ | Thermal simulations have been done on the software COMSOL. | ||
+ | These simulations have been used to verify the heat transfer | ||
+ | of the aluminium mold of the modules, thus helping us improving | ||
+ | their design. For the TAC, many simulations have been done with | ||
+ | different designs. These are the parameters of the simulation for the latest design. | ||
+ | </p> | ||
<h5>Simulation parameters</h5> | <h5>Simulation parameters</h5> | ||
<table> | <table> | ||
Line 441: | Line 453: | ||
to the Peltier element (PS vcc to Peltier gnd and PS gnd to Peltier vcc)</li> | to the Peltier element (PS vcc to Peltier gnd and PS gnd to Peltier vcc)</li> | ||
<li>Set the thermocouple probe at the bottom of the middle hole of the aluminium mold</li> | <li>Set the thermocouple probe at the bottom of the middle hole of the aluminium mold</li> | ||
− | <li>Wait for the thermometer measure to stabilize for 20 | + | <li>Wait for the thermometer measure to stabilize for 20 seconds</li> |
</ol> | </ol> | ||
Line 447: | Line 459: | ||
<ol> | <ol> | ||
<li>Set the voltage of the high current power supply to 1V</li> | <li>Set the voltage of the high current power supply to 1V</li> | ||
− | <li>Wait for thermometer measure to stabilize for at least 20 | + | <li>Wait for thermometer measure to stabilize for at least 20 seconds</li> |
<li>Note the thermometer measure and the voltage associated with it</li> | <li>Note the thermometer measure and the voltage associated with it</li> | ||
<li>Repeats set 1, 2 and 3 and increased the voltage by 1V each time until the thermometer measure is below the specified lower limit (0℃)</li> | <li>Repeats set 1, 2 and 3 and increased the voltage by 1V each time until the thermometer measure is below the specified lower limit (0℃)</li> | ||
Line 479: | Line 491: | ||
to the Peltier element (PS vcc to Peltier vcc and PS gnd to Peltier gnd)</li> | to the Peltier element (PS vcc to Peltier vcc and PS gnd to Peltier gnd)</li> | ||
<li>Set the thermocouple probe at the bottom of the middle hole of the aluminium mold</li> | <li>Set the thermocouple probe at the bottom of the middle hole of the aluminium mold</li> | ||
− | <li>Wait for the thermometer measure to stabilize for 20 | + | <li>Wait for the thermometer measure to stabilize for 20 seconds</li> |
</ol> | </ol> | ||
Line 485: | Line 497: | ||
<ol> | <ol> | ||
<li>Set the voltage of the high current power supply to 1V</li> | <li>Set the voltage of the high current power supply to 1V</li> | ||
− | <li>Wait for thermometer measure to stabilize for at least 20 | + | <li>Wait for thermometer measure to stabilize for at least 20 seconds</li> |
<li>Note the thermometer measure and the voltage associated with it</li> | <li>Note the thermometer measure and the voltage associated with it</li> | ||
<li>Repeats set 1, 2 and 3 and increased the voltage by 1V each time until the thermometer measure is over the specified upper limit (37℃)</li> | <li>Repeats set 1, 2 and 3 and increased the voltage by 1V each time until the thermometer measure is over the specified upper limit (37℃)</li> | ||
Line 523: | Line 535: | ||
<ol> | <ol> | ||
<li>Set the voltage of the high current power supply to reach 42℃</li> | <li>Set the voltage of the high current power supply to reach 42℃</li> | ||
− | <li>Wait for thermometer measure to stabilize for at least 20 | + | <li>Wait for thermometer measure to stabilize for at least 20 seconds</li> |
<li>Stop the high current power supply </li> | <li>Stop the high current power supply </li> | ||
<li>Invert connection between the Peltier element and the high current power supply</li> | <li>Invert connection between the Peltier element and the high current power supply</li> | ||
Line 563: | Line 575: | ||
<ol> | <ol> | ||
<li>Set the voltage of the high current power supply to reach -5℃</li> | <li>Set the voltage of the high current power supply to reach -5℃</li> | ||
− | <li>Wait for thermometer measure to stabilize for at least 20 | + | <li>Wait for thermometer measure to stabilize for at least 20 seconds</li> |
<li>Stop the high current power supply </li> | <li>Stop the high current power supply </li> | ||
<li>Invert connection between the Peltier element and the high current power supply</li> | <li>Invert connection between the Peltier element and the high current power supply</li> | ||
Line 578: | Line 590: | ||
</br> | </br> | ||
<a href="#top_menu_under">Back to top</a> | <a href="#top_menu_under">Back to top</a> | ||
+ | </br> | ||
+ | |||
+ | <span id="TAC Turbidity Experimentations"> </span> | ||
+ | <h3>Turbidity experimentations</h3> | ||
+ | <hr> | ||
+ | <p> | ||
+ | One of the main features of the TAC is the ability to measure the optical density | ||
+ | of the liquid inside the test tube. This measure could be used to calculate the | ||
+ | population of microorganism in the liquid. This experiment was conducted to calibrate | ||
+ | the optical density measurement. | ||
+ | </p> | ||
+ | |||
+ | <h5>Protocol</h5> | ||
+ | <font color="#565656">Purpose</font> | ||
+ | <p> | ||
+ | Calibrate the optical density measurement in the TAC. | ||
+ | </p> | ||
+ | <font color="#565656">Material</font> | ||
+ | <ul> | ||
+ | <li><i>TAC</i> sub-module</li> | ||
+ | <li>Reference test tube filled with liquid with different known optical density</li> | ||
+ | </ul> | ||
+ | |||
+ | <font color="#565656">Setup</font> | ||
+ | <ol> | ||
+ | |||
+ | </ol> | ||
+ | |||
+ | <font color="#565656">Measurement</font> | ||
+ | <ol> | ||
+ | |||
+ | </ol> | ||
+ | |||
+ | <a href="#TAC">Back to TAC</a> | ||
+ | </br> | ||
+ | <a href="#top_menu_under">Back to top</a> | ||
+ | |||
</div></div> <!--Closing tag for div id="mainContainer" and div id="contentContainer". Opening tag are in the template--> | </div></div> <!--Closing tag for div id="mainContainer" and div id="contentContainer". Opening tag are in the template--> | ||
</html> | </html> |
Revision as of 18:24, 12 September 2015
Experiments & Protocols
Projects modules
MC96
A thermal experimentation has been the only experimentation done on the MC96 module.
Thermal experimentations
The only experimentations done are simulations because no prototype has been built yet.
Simulation
Thermal simulations have been done on the software COMSOL. These simulations have been used to verify the heat transfer of the aluminium mold of the modules, thus helping us improve their design. For the MC96, some simulation has been done on early design, but none on the final design, due to the impossibility to simulate heat pipes.
Simulation parameters
Parameters | Values |
---|---|
Peltier element cooling power | 4X60W |
Peltier element heating power | 4X250W |
Air convective heat transfer coefficient | 50W/(m2 ℃) |
Isolation conductive heat transfer coefficient | 5W/(m ℃) |
Aluminium type | 6061-t6 |
Aluminium conductive heat transfer coefficient | 167W/(m ℃) |
Aluminium specific heat capacity | 0.896J/(g ℃) |
MC1.5
Thermal and magnetisation experimentations have been conduct to validate the design of the MC1.5 module.
Thermal experimentation
Simulation
Thermal simulations have been done on the software COMSOL. These simulations have been used to verify the heat transfer of the aluminium mold of the modules, thus helping us improving their design. For the MC1.5, many simulations have been done on different designs. These are the simulation parameters for the latest design.
Simulation parameters
Parameters | Values |
---|---|
Peltier element cooling power | 60W |
Peltier element heating power | 250W |
Air convective heat transfer coefficient | 50W/(m2 ℃) |
Isolation conductive heat transfer coefficient | 5W/(m ℃) |
Aluminium type | 6061-t6 |
Aluminium conductive heat transfer coefficient | 167W/(m ℃) |
Aluminium specific heat capacity | 0.896J/(g ℃) |
Trials protocols
These are the protocol used to test the thermal characteristics of the MC1.5 prototype. These protocols have been tested on a single sub-module of a MC1.5 .
Thermal Experimentations Protocols
- Maintaining a temperature below room temperature test
- Maintaining a temperature over room temperature test
- Cooling speed test
- Heating speed test
Maintaining a temperature below room temperature test
PurposeDetermine if the module temperature stability fits the specified of ±1.5℃, when the set temperature is below room temperature. Also, this test determines the voltage versus the set temperature relation.
Material- MC1.5 sub-module
- High current power supply (bk precision 1694 power supply)
- Power supply (Topward 6303D)
- Electronic thermometer (Fluke 51K/J thermometer)
- Connect the power supply (Topward 6303D) to the fan
- Power up the power supply and adjust the voltage to 12V
- Connect the high current power supply (bk precision 1694 power supply) to the Peltier element (PS vcc to Peltier gnd and PS gnd to Peltier vcc)
- Set the thermocouple probe at the bottom of the middle hole of the aluminium mold
- Wait for the thermometer measure to stabilize for 20 seconds
- Set the voltage of the high current power supply to 1V
- Wait for thermometer measure to stabilize for at least 20 seconds
- Note the thermometer measure and the voltage associated with it
- Repeats set 1, 2 and 3 and increased the voltage by 1V each time until the thermometer measure is below the specified lower limit (0℃)
- Stop the high current power supply
- Stop the fan power supply
Maintaining a temperature over room temperature test
PurposeDetermine if the module temperature stability fits the specification of ±1.5℃, when the set temperature is over room temperature. Also, this test determines the voltage versus the set temperature relation.
Material- MC1.5 sub-module
- High current power supply (bk precision 1694 power supply)
- Power supply (Topward 6303D)
- Electronic thermometer (Fluke 51K/J thermometer)
- Connect the power supply (Topward 6303D) to the fan
- Power up the power supply and adjust the voltage to 12V
- Connect the high current power supply (bk precision 1694 power supply) to the Peltier element (PS vcc to Peltier vcc and PS gnd to Peltier gnd)
- Set the thermocouple probe at the bottom of the middle hole of the aluminium mold
- Wait for the thermometer measure to stabilize for 20 seconds
- Set the voltage of the high current power supply to 1V
- Wait for thermometer measure to stabilize for at least 20 seconds
- Note the thermometer measure and the voltage associated with it
- Repeats set 1, 2 and 3 and increased the voltage by 1V each time until the thermometer measure is over the specified upper limit (80℃)
- Stop the high current power supply
- Stop the fan power supply
Cooling speed test
PurposeDetermine if the module cooling speed fits the specification of 0.5 to 1℃/s. Also, this test determines the optimal voltage to apply to cool the aluminium mold.
Material- MC1.5 sub-module
- High current power supply (bk precision 1694 power supply)
- Power supply (Topward 6303D)
- Electronic thermometer (Fluke 51K/J thermometer)
- Chronometer
- Connect the power supply (Topward 6303D) to the fan
- Power up the power supply and adjust the voltage to 12V
- Connect the high current power supply (bk precision 1694 power supply) to the Peltier element (PS vcc to Peltier vcc and PS gnd to Peltier gnd)
- Set the thermocouple probe at the bottom of the middle hole of the aluminium mold
- Set the voltage of the high current power supply to reach 85℃
- Wait for thermometer measure to stabilize for at least 20 seconds
- Stop the high current power supply
- Invert connection between the Peltier element and the high current power supply
- Set the high current power supply to 15.5V (calculated by this method)
- Start the chronometer when the thermometer measure reach 80℃
- For each 10℃ temperature drop, note the timestamp until 4℃ is reached
- Stop the high current power supply
- Invert connection between the Peltier element and the high current power supply
- Repeats step 1 to 9 for cooling voltage of 15V and 16V
Theoretical method to determine the optimised cooling voltage
Back to MC1.5 Thermal Experimentations ProtocolsHeating speed test
PurposeDetermine if the module heating speed fits the specified 0.5 to 1℃/s.
Material- MC1.5 sub-module
- High current power supply (bk precision 1694 power supply)
- Power supply (Topward 6303D)
- Electronic thermometer (Fluke 51K/J thermometer)
- Chronometer
- Connect the power supply (Topward 6303D) to the fan
- Power up the power supply and adjust the voltage to 12V
- Connect the high current power supply (bk precision 1694 power supply) to the Peltier element (PS vcc to Peltier gnd and PS gnd to Peltier vcc)
- Set the thermocouple probe at the bottom of the middle hole of the aluminium mold
- Set the voltage of the high current power supply to reach -1℃
- Wait for thermometer measure to stabilize for at least 20 second
- Stop the high current power supply
- Invert connection between the Peltier element and the high current power supply
- Set the high current power supply to 24V (Maximal voltage available for the Peltier element)
- Start the chronometer when the thermometer measure reach 4℃
- For each 10℃ temperature rise, note the timestamp until 80℃ is reached
- Stop the high current power supply
Magnetisation experimentations
Applying an electromagnetic field on the test tube liquid is one of the key functionality of the MC1.5. This experiment was conduct in order to confirm that the neodymium magnets are powerful enough.
Protocol
PurposeDetermine if the neodymium magnets are powerful enough to attract the microscopic magnetic beads on the side of the test tube within 5 minutes.
Material- 1.5 ml test tube with liquid and magnetic beads inside
- Neodymium magnet (Type N42)
- Metric Ruler
- Chronometer
- Agitate the 1.5ml test tube to ensure that the magnetic beads are spreads through the liquid
- Place the 1.5ml test tube at the end of the ruler
- Place the center of the magnet in the same relative position as in the MC1.5 module (5mm from the bottom of the test tube and 4mm from the side of the test tube)
- As soon as the magnet is in position, start the chronometer
- Stop the chronometer when the liquid has the same transparency as distilled water
- Note the timestamp on the chronometer
TAC
Thermal and turbidity experimentations have been conduct to validate the design of the TAC module.
Thermal experimentation
Simulation
Thermal simulations have been done on the software COMSOL. These simulations have been used to verify the heat transfer of the aluminium mold of the modules, thus helping us improving their design. For the TAC, many simulations have been done with different designs. These are the parameters of the simulation for the latest design.
Simulation parameters
Parameters | Values |
---|---|
Peltier element cooling power | 60W |
Peltier element heating power | 250W |
Air convective heat transfer coefficient | 50W/(m2 ℃) |
Isolation conductive heat transfer coefficient | 5W/(m ℃) |
Aluminium type | 6061-t6 |
Aluminium conductive heat transfer coefficient | 167W/(m ℃) |
Aluminium specific heat capacity | 0.896J/(g ℃) |
Trials protocols
These are the protocol used to test the thermal characteristic of the TAC prototype. These protocols have been tested on a single sub-module of a TAC .
Thermal Experimentations Protocols
- Maintaining a temperature below room temperature test
- Maintaining a temperature over room temperature test
- Cooling speed test
- Heating speed test
Maintaining a temperature below room temperature test
PurposeDetermine if the module temperature stability fits the specified of ±1.5℃, when the set temperature is below room temperature. Also, this test determines the voltage versus the set temperature relation.
Material- TAC sub-module
- High current power supply (bk precision 1694 power supply)
- Power supply (Topward 6303D)
- Electronic thermometer (Fluke 51K/J thermometer)
- Connect the power supply (Topward 6303D) to the fan
- Power up the power supply and adjust the voltage to 12V
- Connect the high current power supply (bk precision 1694 power supply) to the Peltier element (PS vcc to Peltier gnd and PS gnd to Peltier vcc)
- Set the thermocouple probe at the bottom of the middle hole of the aluminium mold
- Wait for the thermometer measure to stabilize for 20 seconds
- Set the voltage of the high current power supply to 1V
- Wait for thermometer measure to stabilize for at least 20 seconds
- Note the thermometer measure and the voltage associated with it
- Repeats set 1, 2 and 3 and increased the voltage by 1V each time until the thermometer measure is below the specified lower limit (0℃)
- Stop the high current power supply
- Stop the fan power supply
Maintaining a temperature over room temperature test
PurposeDetermine if the module temperature stability fits the specification of ±1.5℃, when the set temperature is over room temperature. Also, this test determines the voltage versus the set temperature relation.
Material- TAC sub-module
- High current power supply (bk precision 1694 power supply)
- Power supply (Topward 6303D)
- Electronic thermometer (Fluke 51K/J thermometer)
- Connect the power supply (Topward 6303D) to the fan
- Power up the power supply and adjust the voltage to 12V
- Connect the high current power supply (bk precision 1694 power supply) to the Peltier element (PS vcc to Peltier vcc and PS gnd to Peltier gnd)
- Set the thermocouple probe at the bottom of the middle hole of the aluminium mold
- Wait for the thermometer measure to stabilize for 20 seconds
- Set the voltage of the high current power supply to 1V
- Wait for thermometer measure to stabilize for at least 20 seconds
- Note the thermometer measure and the voltage associated with it
- Repeats set 1, 2 and 3 and increased the voltage by 1V each time until the thermometer measure is over the specified upper limit (37℃)
- Stop the high current power supply
- Stop the fan power supply
Cooling speed test
PurposeDetermine if the module cooling speed fit the specification of 0.3℃/s above room temperature and 0.2℃/s under room temperature. Also, this test determines the optimal voltage to apply to cool the aluminium mold.
Material- TAC sub-module
- High current power supply (bk precision 1694 power supply)
- Power supply (Topward 6303D)
- Electronic thermometer (Fluke 51K/J thermometer)
- Chronometer
- Connect the power supply (Topward 6303D) to the fan
- Power up the power supply and adjust the voltage to 12V
- Connect the high current power supply (bk precision 1694 power supply) to the Peltier element (PS vcc to Peltier vcc and PS gnd to Peltier gnd)
- Set the thermocouple probe at the bottom of the middle hole of the aluminium mold
- Set the voltage of the high current power supply to reach 42℃
- Wait for thermometer measure to stabilize for at least 20 seconds
- Stop the high current power supply
- Invert connection between the Peltier element and the high current power supply
- Set the high current power supply to 15.5V (calculated by this method)
- Start the chronometer when the thermometer measure reach 37℃
- For each 2℃ temperature drop, note the timestamp until 0℃ is reached
- Stop the high current power supply
- Invert connection between the Peltier element and the high current power supply
- Repeats step 1 to 9 for cooling voltage of 15V and 16V
Heating speed test
PurposeDetermine if the module heating speed fits the specified 0.5 to 1℃/s.
Material- TAC sub-module
- High current power supply (bk precision 1694 power supply)
- Power supply (Topward 6303D)
- Electronic thermometer (Fluke 51K/J thermometer)
- Chronometer
- Connect the power supply (Topward 6303D) to the fan
- Power up the power supply and adjust the voltage to 12V
- Connect the high current power supply (bk precision 1694 power supply) to the Peltier element (PS vcc to Peltier gnd and PS gnd to Peltier vcc)
- Set the thermocouple probe at the bottom of the middle hole of the aluminium mold
- Set the voltage of the high current power supply to reach -5℃
- Wait for thermometer measure to stabilize for at least 20 seconds
- Stop the high current power supply
- Invert connection between the Peltier element and the high current power supply
- Set the high current power supply to 24V (Maximal voltage available for the Peltier element)
- Start the chronometer when the thermometer measure reach 0℃
- For each 5℃ temperature rise, note the timestamp until 37℃ is reached
- Stop the high current power supply
Turbidity experimentations
One of the main features of the TAC is the ability to measure the optical density of the liquid inside the test tube. This measure could be used to calculate the population of microorganism in the liquid. This experiment was conducted to calibrate the optical density measurement.
Protocol
PurposeCalibrate the optical density measurement in the TAC.
Material- TAC sub-module
- Reference test tube filled with liquid with different known optical density