Controller Temperature for Infrared Paint Curing Design Report 4/17/01
Abstract
The purpose of this project is to design a temperature controlling system that automates automobile paint curing by using infrared lamps. A non-contact infrared temperature sensor will be used for surface temperature detection. A temperature controller will receive the surface temperature from the sensor as input. Based on the sensor input, the controller will adjust the power input of the infrared curing lamps. The output of the infrared curing lamps will modulate the surface temperature according to time and temperature specifications. The controller will also contain a time and temperature display and keypad for indication purposes. This method will greatly increase the consistency and efficiency of the paint curing process.
Definition of Terms
Curing Using heat, radiation, or reaction with chemical additives to change the properties of a polymeric system into a more stable, usable condition. For liquid coatings, it is the process by which the liquid is converted into a solid film. Infrared An invisible band of radiation at the lower end of the electromagnetic spectrum. It starts at the middle of the microwave spectrum and goes up to the beginning of visible light. Infrared transmission requires an unobstructed line of sight between the transmitter and receiver. It is used for wireless transmission between computer devices as well as for most TV, video and stereo handheld remotes. Microcontroller A highly integrated chip that contains all controller components. Typically, this includes a CPU, RAM, some form of ROM, I/O ports, and timers. Unlike a general-purpose computer, which also includes all of these components, a microcontroller is designed for a very specific task for example a temperature microcontroller could be used to control the surface temperature of an automobile. As a result, the parts can be simplified and reduced to cut down on production costs. Microcontrollers are sometimes called embedded controllers, which simply means that they are part of an embedded system -- that is, one part of a larger device or system. Programmable Logic Controller (PLC) A computer used in process control applications. PLC microprocessors are typically RISC-based and are designed for high-speed, real-time and rugged industrial environments.
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Temperature Controller for Infrared Paint Curing Design Report 4/17/01
Introduction
A design report ensures consistency as well as structure on the set of activities required to complete a project on time and on budget. A description of the general background of the project, a definition of the technical problem faced in the project, the operating environment as well as the intended users and uses of the final product, and the assumptions and limitations of the project are all described in the subsections below. This information will provide a clear understanding of the overall project design. General background The goal of the project is to automate the current paint curing process. This task will involve three major components: an infrared temperature sensor, a temperature controller, and infrared heating lamps. The temperature sensor has the ability to measure the temperature of a surface without contact. The sensor will be utilized in detecting the temperature of the curing surface and the measured value will be inputted to the temperature controller. The temperature controller will use this inputted temperature value and will adjust the power input to the infrared heating lamps to control the temperature of the cured surface. The temperature controller can be programmed to vary temperature levels as well as timing at each level to properly cure automobile surfaces. The temperature controlling system will continue to sense and adjust surface temperatures until the curing procedure is completed. A basic illustration of the system is provided in Figure 1.
Figure 1: Temperature Controlling System The temperature controller has an output of 4 to 20 milliamps. This will require the controller to be calibrated such that 4 milliamps will turn the infrared lamps off to produce an output temperature of 0 degrees Fahrenheit. When the output of Department of Electrical and Computer Engineering
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Temperature Controller for Infrared Paint Curing Design Report 4/17/01 the temperature controller is 20 milliamps, the lights will be at maximum power to increase the surface temperature to as much as 150 degrees Fahrenheit. The temperature controller will display the surface temperature detected by the infrared temperature sensor and the time remaining for the current curing stage. A small keypad is integrated on the front of the controller for turning the device on and off, programming the controller, and selecting between different controller functions such as time left on a curing stage and surface temperature. The controller has the ability to adjust curing times and temperatures. This ability is required for a proper curing procedure. The controller will be contained in a small, protective box connected to the infrared lamp stand. This box allows for wire adjustments between the components of the temperature controlling system without temperature interference. Because this box will be attached to the infrared curing lamp stand, the device will be easier to transport. The box will also protect the controller from environmental factors such as dirt, sparks, or being dropped. A picture of the non-contact infrared sensor to be used in the project appears in Appendix D. Pictures of the infrared curing lamps that will be used appear in Appendix C. A picture of the temperature controller appears in Appendix E. Technical problem
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Temperature Controller for Infrared Paint Curing Design Report 4/17/01 The control device employs a microprocessor-based temperature controller powered by a 120-volt outlet. The temperature controller will utilize one input and one output to control the temperature of the curing surface. The controller has a display screen in LED format that shows the temperature of the paint surface and the time remaining for the current curing stage. The display will be visible from outside of the protective box around the controller. The protective box will be attached to the stand holding the infrared curing lamps. This will make it easier to move the whole curing system at the same time. The times and temperatures for each curing stage are programmed into the temperature controller by the keypad on the front of the controller. When programmed, the controller will utilize the temperature of the curing surface as input and the temperature and time that the lamps hold the surface temperature at a specified value as output. If the surface temperature that the program is attempting to provide does not agree with the temperature the infrared sensor detects, then the controller will adjust the power input to the lights. The power sent to the lights will be increased if the surface temperature is too low and decreased if the surface temperature is too high. The controller will also allow the operator to change curing times and temperatures to compensate for differences in paint and surface types. More information about how to program the controller is provided later in this report. The infrared temperature sensor is attached to the controller via a wired connection. The sensor uses infrared technology to detect the temperature of the paint surface within plus or minus two degrees Fahrenheit without direct contact with the surface. The controller will be calibrated such that it displays accurate temperature readings after receiving the sensor input. The sensor will be attached to the stand that the curing lamps are on. It will not, however, be contained within the protective box when in use. This will ensure that the sensor is reading the paint surface temperature instead of an intermediate surface temperature such as protective plastic or glass. The sensor will be attached to the side of the box at an angle that allows it to point directly at the surface. When not in use, the sensor will be covered by a separate box so that it will not damaged by the harsh environment. The infrared curing lamps will be connected to the controller via a wired connection. The output from the controller will be calibrated to the lamps so that the infrared heat will generate a surface temperature that will agree with the controller's specifications. Operating environment The curing system will be used in an autobody shop where it may be exposed to dirt, sparks, paint fumes, and extreme hot or cold temperatures. These environmental hazards could degrade the performance and accuracy of the temperature controlling system. For these reasons, the temperature controller will be contained in a protective box. The temperature sensor has an exterior plastic protective shell that is robust enough to withstand extreme temperatures, sparks, Department of Electrical and Computer Engineering
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Temperature Controller for Infrared Paint Curing Design Report 4/17/01 and paint fumes during operation. When the sensor is not in use, a box will shield it from the environment. Intended users and intended uses Mechanics and auto technicians will use this device to ensure correct and efficient automobile paint curing. The product is intended to control the temperature and duration of infrared lamp power for retouching or repainting damaged vehicles. Assumptions 1. There will be no more than one curing station running at one time when using this control system. 2. The controller will accurately detect the output from the temperature sensor. 3. Wires from the temperature sensor and infrared lamps will not interfere when they are both connected to the controller. 4. The controller has the ability to display the temperature of the paint surface and the time remaining on a curing stage. 5. The temperature sensor will be accurate within plus or minus two degrees Fahrenheit of the actual surface temperature. 6. The controller will have a timer that is accurate within plus or minus five seconds. 7. Infrared curing lamps will provide uniform temperature coverage over the entire paint surface. 8. Infrared curing lamps will not directly affect the infrared temperature sensor readings of the paint surface. Limitations 1. Running wires between components could obstruct the equipment or the operators. 2. The device should be easily moveable. 3. The cost of a compatible infrared temperature sensor for this project ranges from $75-$200. 4. The cost of a compatible temperature controller for this project is typically more than $250. 5. Communication from the controller to the temperature sensor and infrared lamps will not involve radio frequencies because of a lack of knowledge about how to perform such a task. 6. Communication from the controller to the temperature sensors and lamps will not involve an infrared system. The group lacks the knowledge to complete this activity. Also, environmental concerns, such as dirt and temperature extremes make an infrared communication system very difficult to employ accurately. 7. The time required to complete the project is limited. The group will need to work quickly and efficiently to complete the project on time. 8. The temperature sensor accuracy and field-of-view will decrease as distance from the surface increases. Department of Electrical and Computer Engineering
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Temperature Controller for Infrared Paint Curing Design Report 4/17/01
Design Requirements
An excellent understanding of design requirements is necessary for a successful design report. The components found in this section include the design objectives which further define the technical problem, the functional requirements which describe the end product's functionality, the design constraints to be considered throughout the design and implementation process, and the measurable milestones to evaluate the success of the project. Thoroughly considering these components ensures success in this engineering project. Design objectives This project involves a non-contact infrared temperature sensor, a microprocessor-based temperature controller, and infrared curing lamps to create a temperature controlling system used in the paint curing of automobiles. A description of the uses for these devices is provided below. 1. Utilize non-contact infrared temperature sensors The temperature sensor is pointed at a surface and reads the temperature of that surface. The detected temperature is then sent to the temperature controller via a wired connection. 2. Utilize a temperature controller The controller utilizes one input and one output. The input comes from a non-contact infrared temperature sensor. The output from the controller is a 4 to 20 milliamp signal that adjusts the infrared curing lamp output temperature. The controller has an LED display that will show the surface temperature and the time remaining for different curing stages. The controller has a keypad on the front panel used for turning the device on and off, programming curing times and temperatures, and viewing the status of the controller during the curing process. The controller can be programmed by pressing a sequence of keys on the keypad. This process is described later in the report. 3. Utilize infrared curing lamps The lamps can provide varying temperatures to cure paint based on the power input from the temperature controller. The connection between the controller and curing lamps is wired. Functional requirements The functional requirements for the project provide a clear illustration of the tasks the final product will perform. The main functional requirements involved in this project are regulation of the inputs and outputs of the temperature controller, the Department of Electrical and Computer Engineering
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Temperature Controller for Infrared Paint Curing Design Report 4/17/01 display requirements provided by the temperature controller, the temperature sensor requirements, and the infrared lamp requirements. A description of these constraints is provided below. 1. Temperature controller requirements The controller adjusts the temperature of a surface by varying the power input to infrared lamps. In addition, the controller keeps track of the time and temperature required throughout each curing phase. The controller can adjust the temperature of the infrared lamps to match the required temperature for a particular curing stage. The controller allows adjustments to be made to the remaining curing time and to the optimal surface temperature by using the keypad on the controller. If the surface temperature is not equal to the specified program temperature, then the controller adjusts the power input to the curing lamps to achieve the desired temperature. A surface temperature that is lower than what the program calls for will cause the controller to increase the power input to the curing lamps in order to increase the surface temperature. A surface temperature that is higher than what the program calls for will cause the controller to decrease the power input to the curing lamps in order to decrease the surface temperature. The controller automatically turns a station off when curing has been completed. Display requirements The controller can display the temperature of the paint surface. The controller can display the time remaining on the current curing stage. Intermediate programming steps can be displayed on the controller. Temperature sensor requirements Accuracy for the temperature sensor must be within plus or minus two degrees Fahrenheit in order to ensure that the curing surface will be very close to the program specifications. The sensor has the ability to produce an output to the controller. Infrared lamp requirements The surface temperature provided by the lamps will be uniform across the entire curing area. Lamps may be controlled by the temperature controller.
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Temperature Controller for Infrared Paint Curing Design Report 4/17/01 Calibration between the temperature controller and the infrared curing lamps will provide correct surface temperature adjustments.
Design constraints In order to operate a system properly and according to specification, an engineering project must have constraints. This project includes constraints in the size of the device, operation of the system as whole, and environmental factors that must be considered when the system is implemented. A description of these constraints is provided below. 1. Size constraints The box that the controller is contained in will be no more than cubic feet larger than the controller itself. This will ensure that the keypad on the controller will be easy to reach and that the wires coming from the controller will be a reasonable length. The total controller unit (not including infrared curing lamps) is light enough for someone to easily lift so that it can be moved without difficulty. 2. Control constraints The temperature sensor needs to output detected temperature information to the controller. The temperature sensor is accurate within plus or minus two degrees Fahrenheit to ensure proper curing. A 120-volt power outlet provides power to the controller. The timer on the controller should be accurate within plus or minus five seconds. The power input to the lamps should be consistent so that the temperature output of the lamps is accurate. Calibration between the temperature sensor, controller, and curing lamps may be difficult. The input signal may need to be manipulated within the controller to provide an accurate temperature reading. Also, the input signal to the infrared curing lamps may need to be manipulated within the controller to create the appropriate lamp output temperature. 3. Environmental constraints There will be a small box covering the controller to prevent dirt, sparks, and other environmental factors from affecting it. The wires running from the temperature sensors to the controller and from the controller to the infrared lamps should be durable enough to withstand extreme temperatures.
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Temperature Controller for Infrared Paint Curing Design Report 4/17/01 The wires running from the temperature sensors to the controller and from the controller to the infrared lamps should not obstruct equipment or operators.
Measurable milestones Milestones are a necessary means of measuring and evaluating the success of any engineering project. A brief description of each milestone, the importance of each milestone in terms of the project as a whole, as well its level of completion, is provided below.
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Select a temperature controller to be used for the project: 1% This task will be deemed complete when a controller that meets the specifications detailed in this report are found. Current milestone results: This task is 100% complete. H&S Autoshot previously purchased a temperature controller. The group has studied the controller and determined that it can perform the functions required for the project.
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Select a temperature sensor to be used for the project: 1% The temperature sensor must be accurate within plus or minus two degrees Fahrenheit and must output a signal to the temperature controller. Current milestone results: This task is 50% complete. H&S Autoshot has provided a non-contact infrared temperature sensor, however this sensor has not been tested for accuracy or output ability. After testing this sensor, the group will determine if a different sensor is needed. The group has researched other sensors and will be able to obtain one if the need arises.
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Learn how to use the controller, how to program it, and complete programming of the controller: 15% When designated members of the group have had a chance to read the controller operational manual and have shown that they can easily program the controller, this task will be complete. Current milestone results: This task is approximately 10% completed. The group has received the controller manual and associated materials. This information has been briefly reviewed to ensure that the controller can perform the required project functions; however, the group has not yet learned how to use or program the controller.
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Determine functionality of the temperature controlling system: 10% When the group discusses additional functions within the group, with H&S Autoshot, and with the project advisors, and cannot determine additional functions to be added, this task will be complete. Department of Electrical and Computer Engineering
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Temperature Controller for Infrared Paint Curing Design Report 4/17/01
Current milestone results: This task is 50% complete. An initial set of functions have been discussed within the group and included in this report. After learning more about the project and defining more clearly what H&S Autoshot wants for this project, additional functions will be discussed and addressed if the need arises.
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Determine design of the complete system: 15% When the group, the advisors, and H&S Autoshot are satisfied with the design, this task will be complete. Current milestone results: This task is 75% complete. The group has agreed on a large amount of the total design of the curing system. This design is discussed in detail in this report. The last step of this task is to discuss all design plans with the project advisors and H&S Autoshot to determine if any aspects of the design should be modified.
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Testing of curing system parts and functions: 15% After all tests on individual parts and functions are completed with successful conclusions, this task will be complete. The tests that will be performed and the definition for the success for each of these tests are discussed later in this report. Current milestone results: This task is 0% complete. No tests have been performed on any system parts or components at this time.
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Implementation of the curing system tests: 20% When the individual parts of the curing system have been completely tested, and all tests are successful, the unit will need to be completely connected and thoroughly tested to ensure that the entire system works correctly. Current milestone results: This task is 0% complete. The system will not be implemented until the Fall 2001 semester.
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Document project with poster, reports, and presentations: 18% When all poster, documentation criteria, and oral presentations are completed to the satisfaction of group members and advisors, this task will be complete. Current milestone results: This task is 50% complete. The project plan, poster, and design reports have been completed. The final report and oral presentations will be completed at later dates.
End-Product of Description
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Temperature Controller for Infrared Paint Curing Design Report 4/17/01 This product is used to control the curing of paint on automobiles using infrared lamps. A microprocessor-based temperature controller is used to control an infrared lamp paint curing station. The controller receives a temperature input from a non-contact infrared temperature sensor that reads the temperature of the paint surface. The controller uses an internal timer to indicate when the power input to the lamps needs to be changed in order to alter the temperature for various curing stages. When curing for the station is done, the controller switches the lights at that station off and the paint needs no further drying.
Approach and Design
Because there is rarely a perfect solution in any engineering project, many approaches must be thoroughly considered when planning a project. The technical approaches, technical design, testing description and the risks and their management are all described below. These features provide an understanding of how the final product will be created and tested and how possible risks will be handled. Technical approaches The project requires detecting the temperature of an automobile surface. Many approaches were considered to accomplish this task. These approaches included detecting the temperature by observing variations in paint color, adding a chemical to the paint to sense the temperature, or using a non-contact infrared temperature sensor. The sensor could be combined with a separate backside surface temperature contact to assist with accuracy. Research was done on each of these methods and the non-contact infrared temperature sensor without the backside surface temperature contact was found to be the most practical in terms of cost, flexibility and accuracy. Because the project requires temperature adjustment depending upon the sensor reading, a control device must be used to interact with the infrared curing lamps. Research was done in order to determine a controller that would perform these functions with the greatest efficiency. Microprocessor controllers, programmable logic controllers (PLCs), and temperature controllers were examined to determine the benefits and drawbacks of each in a temperature-controlling project. Although the microprocessor controllers and the PLCs had a variety of uses, temperature controllers were found to be the best solution for this project due to the ease in programming for temperature sensing projects. The group communicated with H&S Autoshot to get input on the functions and designs the company would like to include in the system. Ideas were also gathered from the client to best determine how the project should be completed. H&S Autoshot has donated a temperature controller as well as a temperature sensor; therefore, the project will be implemented with these devices. Technical design The curing system consists of a non-contact infrared temperature sensor, a microprocessor-based temperature controller, and infrared heating lamps. A simple design of the system is illustrated in Figure 2. Department of Electrical and Computer Engineering
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Temperature Controller for Infrared Paint Curing Design Report 4/17/01
Figure 2: Design of Temperature Controlling System The method used for communication, an explanation of the purpose of each component and a description of the user interface is all provided below. System Communication The system begins when the user turns the temperature controller on and selects the program that corresponds to a paint-curing task. For the system to work properly, the temperature sensor, temperature controller, and infrared lamps must communicate. Many methods of communication were studied while creating the design. Wired, infrared, and radio communication were all considered, but wired communication was selected for four reasons. First, wiring is inexpensive and easy to work with. Second, using infrared or radio communication is beyond the group's current capabilities. Third, wires may be a reasonable length because all devices are located within close range on the lamp stand. Finally, the operating environment of the final system makes it difficult to implement an infrared or radio communication system. Dirt, sparks, extreme temperatures and paint fumes can cause problems for these systems, but a wired system can withstand these obstacles. For example, if an infrared system were used, the communication integrity between the controller and the temperature sensor could break down because of extreme temperatures caused by the infrared curing lamps. This would damage the accuracy of the curing system. System Components A description of each component in the system design is provided below. This will provide a clear description of the paint curing system components. Non-contact Infrared Temperature Sensor A non-contact infrared temperature sensor was chosen over the use of the sensor with a backside surface temperature contact for a few reasons. First, the heat transmission through the surface material would be very hard to predict and may Department of Electrical and Computer Engineering
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Temperature Controller for Infrared Paint Curing Design Report 4/17/01 not be uniform. Because of this, the backside temperature contact would not provide an accurate reading of the surface temperature. This method would confuse temperature readings gathered by the non-contact infrared temperature sensor. Also, it may be very difficult to place a contact on the backside of a surface. For example, if an automobile door were being cured, it could be problematic to place a sensor on its backside. For these reasons it was determined that the infrared temperature sensor should be used alone to determine surface temperatures. The temperature sensor to be used in the project has been donated by H&S Autoshot. The sensor can be easily mounted onto the infrared lamp stand because it is small in size and lightweight. It is encased in a robust plastic jacket so it will be protected from the harsh operating environment characteristic of paint curing stations. The sensor manual indicates that it has the ability to detect temperatures ranging from 0 to 180 degrees Fahrenheit within plus or minus two degrees. This accuracy and temperature range is sufficient for the project needs. The temperature sensor has a 3:1 field-of-view which allows it to detect surface temperatures at an angle of 17 degrees from its direct line of sight. The output of the temperature sensor can easily be connected to a temperature-controlling device providing an accurate real-time temperature reading by using a wired connection. The specifications for the temperature sensor can be viewed in Appendix D. Temperature Controller A microprocessor-based temperature controller was chosen over the use of a PLC for a few reasons. Generally, PLCs are large and not easily moved from place to place. This application requires that the controller be portable to accommodate mobile curing stations. PLCs are also expensive and can be difficult to program for accurate measurements. Although the accuracy of a PLC versus a microprocessor-based temperature controller is very similar, the temperature controller was chosen based on its portability, inexpensiveness and programming ease. H&S Autoshot donated a Fuji temperature controller to the project team. A standard 120-volt outlet supplies power to the temperature controller. The controller has the ability to accept one temperature input and control one 4 to 20 milliamp output. The temperature sensor will provide the temperature of the curing surface as input to the controller. This input will be read and the output will be adjusted accordingly to control the power input to the infrared heating lamps. This will set the infrared heating lamps to the desired heat level to produce a specific temperature. The temperature sensor will continually monitor and report the surface temperature ensuring that the temperature required for the curing stage is met. The specifications for the temperature controller can be viewed in Appendices E-I.
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Temperature Controller for Infrared Paint Curing Design Report 4/17/01 The varying times and temperatures required for proper operation in the curing process can be programmed in the temperature controller. This is necessary because there are many different types of paint properties and automobile surfaces, which require alternate temperature and time requirements. The designer can program all of the time and temperature requirements for the different types of paints used. Programming the controller is accomplished by pressing a sequence of keys on the front panel of the controller. After the programs are entered, they may be recalled by simply specifying a program number. Controller programs can be updated or added at any time. This procedure will greatly reduce the time needed to set up the controller for a desired curing process. In addition, the programmed controller will automate the paint curing process while remaining user-friendly. The programming procedure can be accomplished by using the controller manual or by speaking with a technical designer of the equipment. An excerpt from the manual describing how to program the controller is provided in Appendices F-I. The Appendices show the general system that the temperature controller uses to set temperature and time in the curing process. Infrared Heating Lamps The temperature controller will control the infrared heating lamps. The input supplied by the controller will adjust the heating lamps to a specific temperature to achieve the required temperature for the curing surface. The specifications for the infrared heating lamps can be viewed in Appendix C. User Interface The designers will preprogram the controller so the users can easily select the curing procedure for the specific paint type and automobile surface. The user will simply press a small sequence of keys to select the proper program and then the run button is pressed to execute the program. A description of how to run a program is show in Appendices F-I and an illustration of the user interface is supplied in Appendix E. Testing description To ensure proper operation of the temperature controller paint curing system, testing is required. A listing of the components to test as well as the methods by which to test them is provided below. Testing forms are included which will be used when performing the tests. Temperature sensor testing: 1. The connection between the temperature sensor and the temperature controller will be tested by aiming the sensor at a surface to determine if it detects a temperature. Detection will be verified by connecting the sensor to the temperature controller. If a value for the temperature of the surface is displayed on the temperature controller, the connection between the controller and temperature sensor works. If Department of Electrical and Computer Engineering
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Temperature Controller for Infrared Paint Curing Design Report 4/17/01 this test fails, connections between the controller and the sensor will be checked and the test will be performed again until it is successful. 2. The accuracy of the temperature controller and temperature sensor will be determined by aiming the temperature sensor at a known source and reading the value displayed. If the temperature display is not accurate with the predicted surface temperature, adjustments will be made to the controller to calibrate it correctly and the test will be performed until it is successful. Controller testing: 1. The controller will be tested by operating full runs with the lamps and temperature sensor hooked up. A short test run will be performed by changing the surface temperature from 0 to 100 degrees Fahrenheit, then to 145 degrees Fahrenheit to determine if the controller works correctly. Each temperature stage will be programmed to last for three minutes before changing. If the controller changes the power input to the infrared curing lamps at three minutes from the start time, the internal timer is working correctly. If this test fails, the program will be checked and the test will be performed again until it is successful. 2. After determining that the temperature sensor is accurate, the power input to the lamps from the controller will be tested. An input will be sent to the lamps, and the output from the lights should generate the desired surface temperature. The temperature sensors will be used to verify the accuracy of the controller output. If this test is not successful, the controller will be re-calibrated so that the power input to the lights will create the correct surface temperature. The test will then be performed again until it is successful. The forms that will be used when testing the temperature control system are shown in Tables 1 and 2. Table 1: Temperature Sensor Testing Form Tester name: Temperature sensor is connected to the controller and pointed at a surface. The controller displays a temperature value. Temperature sensor is Department of Electrical and Computer Engineering
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Test 1: Temperature Sensor Testing Test successful Date/Time (Yes/No)
Notes
Temperature Controller for Infrared Paint Curing Design Report 4/17/01 connected to the controller and is pointed at one known temperature surface. Controller displays correct temperature of known temperature surface. Table 2: Temperature Controller Testing Form Test 2: Temperature Controller Testing (Full run with lamps and temperature sensor hooked up) Tester name: Test successful Date/Time Notes (Yes/No) Controller turns lamps on and sets surface temperature...