Armfield Instruction Manual
170
In the software, click on the heater controller and alter the temperature set point to
60°C (unless the initial set point value chosen was not 50°C, when a value of 10°C
higher than the initial set point is suggested instead). Apply the new setting and close
the controller window.
Select the
icon to begin data logging.
Log the temperature for 10 minutes, and then select the
icon to finish data
logging.
Create a new results sheet by selecting the
icon.
In the software, click on the heater controller and alter the temperature set point to
70°C. Apply the new setting and close the controller window.
Select the
icon to begin data logging.
Log the temperature for 10 minutes, and then select the
icon to finish data
logging.
Create a new results sheet by selecting the
icon.
Note that the heater circuit includes a safety cut-out which shuts off power to the
heater if the temperature in the vessel exceeds approximately 80°C. Set point values
should therefore be kept well below this temperature.
Leave the Set Point at 70°C for the next part of the exercise.
Temperature Set Point for Flow Rate Controller
Investigate the effect of changing the set point temperature for the gear pump
controller:
In the software, click on the Pump Controller and alter the temperature set point to
35°C (unless the initial set point value chosen was not 30°C, when a value of 5°C
higher than the initial set point is suggested instead). Apply the new setting and close
the controller window.
Select the
icon to begin data logging.
Log the temperature for 10 minutes, and then select the
icon to finish data
logging.
Create a new results sheet by selecting the
icon.
Repeat the procedure, altering the set point and recording the change in temperature
over time. Suggested values for the temperature set point value are 40 and 45°C, but
more values may be attempted if laboratory time allows. Remember to create a new
results sheet for each set of data. Note that during indirect heating it is unlikely that
process fluid temperatures of greater than 50°C will be achievable.
Return the Set Point for the pump controller to its original value (usually 50°C).
Return the Set Point for the heater controller to its original value (usually 30°C).
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