Heat and Temperature

Mechanical equivalence of heat

• Lab Quest Mini (LQM)
• LQM USB cord
• Rotary encoder on wooden bracket
• LQM digital to telecom adapter
• Force sensor
• Pasco Mechanical equivalence of heat (“friction”) device
  • Either aluminum or brass (use only one at each setup… doesn't matter which)
• Mass pan (200 g total)
• 2 C-Clamps (3“ or greater opening)
• Short yellow (heavy duty) string with loops at both ends
• Homemade board (red and yellow cables on one end, telecom cable on the other end) w/ female telecom to female telecom adapter
• Rotary encoder to LQM telecom cable
• 2 Digital to telecom cables

Setup tips:

• This experiment works best if set up on the corners of the island benches.
• Clamp both rotary encoder and mechanical equivalence device to the bench FIRMLY.
• Connect rotary encoder to Dig 1 on LQM
• Connect force sensor to Ch1 on LQM and set to 50 N scale
• Connect thermistor to Ch2 on LQM

Test by running Logger Pro config file (“friction”) and pulling a few cycles to ensure all sensors are reading properly.

Ideal gas law

• Lab Quest Mini (LQM)
• LQM USB cord
• Ideal gas law device w/ connections
  • 3 stereo to LQM cables
  • 1 power cord
• 1 C-Clamp (2” or greater opening)

Setup tips:

• Clamp the device to the table to make sure it does not move.
• Check the values to make sure they are not locked (too hard to open/close) or leaky. Use valve grease if needed.
• Connect temperature to Ch1 on LQM
• Connect volume to Ch2 on LQM
• Connect pressure to Ch3 on LQM

Test by running the Logger Pro config file (“ideal gas law”). Type in the calibration settings (unique values pasted to the side of each device) and push/pull a few cycles to test sensors.

Heat engine/Heat pump

• Lab Quest Mini (LQM)
• LQM USB cord
• Battery eliminator
• Pasco heat engine/heat pump board
• Short banana cable (connecting “B” to “output load” on board)
• Precision 1 ohm resistor w/ short red and black banana cables
• Multimeter
• 2 homemade boards (red and yellow cables on one end, telecom cable on the other end) w/ female telecom to female telecom adapters
• Digital to red and black banana cables (use the longer, single-piece cables, not the shorter ones with the adapters on the end because they are wired differently)
• 2 Digital to telecom cables
• 2 red and 2 black banana cables

Setup tips:

• On the board, make sure the short banana cable is connecting “B” to “output load” on board.
• On the battery eliminator, make sure the current knob is turned all the way to maximum and the voltage knob (which might not have a knob connected anymore) is turned such that the eliminator provides between 5 and 10 V when in use.
• Connect the hot thermistor to Ch1 on the LQM
• Connect the cold thermistor to Ch2 on the LQM
• Connect the Peltier current to the 1 ohm resistor, and then connect the voltage probe in parallel across the resistor and connect the other end to Ch3 on the LQM
• Connect the Peltier voltage to the multimeter

Test by running the Logger Pro config file (“heat engine”). Run through both the heat engine cycle (first) and then the heat pump cycle (second) to test all sensors.

• 2 mass balances
• Extra parts:
  • Several multimeters
  • 1 Lab Quest Mini (LQM)
  • 1 LQM USB cord
  • 1 Battery eliminator
  • 1 Pasco heat engine/heat pump board w/ short banana cable
  • 1 Precision 1 ohm resistor w/ short red and black banana cables
  • 2 homemade boards (red and yellow cables on one end, telecom cable on the other end) w/ female telecom to female telecom adapters
  • 1 Digital to red and black banana cables (use the longer, single-piece cables, not the shorter ones with the adapters on the end because they are wired differently)
  • 1 Digital to telecom cables
  • 1 Rotary encoder on wooden bracket
  • Rotary encoder to LQM telecom cable
  • 1 Force sensor
  • 2 Pasco Mechanical equivalence of heat (“friction”) devices (one brass and one aluminum)
  • 1 short yellow (heavy duty) string with loops at both ends