thermcraft_tube_oven
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| thermcraft_tube_oven [2022/09/28 08:55] – [Tube oven annealing - Description] scholma | thermcraft_tube_oven [2023/03/15 14:11] (current) – scholma | ||
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| - | ====== Tube oven annealing | + | ====== Tube oven annealing ====== |
| The tube oven has a temperature range of 50-1200 °C and can fit 1 inch diameter tubes. Temperature regulation is done by a Eurotherm 2404 controller. | The tube oven has a temperature range of 50-1200 °C and can fit 1 inch diameter tubes. Temperature regulation is done by a Eurotherm 2404 controller. | ||
| Three different process gasses can be connected, at the moment H2 and Ar are connected. Gas flow of each gas is controlled by a mass flow controller (MFC), mixing is possible. | Three different process gasses can be connected, at the moment H2 and Ar are connected. Gas flow of each gas is controlled by a mass flow controller (MFC), mixing is possible. | ||
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| * if you want to use a pressure setpoint you can set the pressure control valve to setpoint mode. | * if you want to use a pressure setpoint you can set the pressure control valve to setpoint mode. | ||
| * start pump | * start pump | ||
| - | * open manual valves near MFCs of the gasses you would like to use | ||
| * pressure should reach < | * pressure should reach < | ||
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| * close safety cabinet | * close safety cabinet | ||
| * open manual valve behind the hydrogen MFC | * open manual valve behind the hydrogen MFC | ||
| - | * set nitrogen flow; nitrogen flow should be 100x hydrogen flow to dilute the gas mixture going into the pump. | + | * set nitrogen flow with the large round black needle valve on the wall; nitrogen flow should be >100x hydrogen flow setpoint |
| - | * make sure all safety interlocks are met; now you can open the hydrogen safety valve from the GUI | + | |
| * When first opening the valve you will have a small burst of flow, set a high nitrogen flow ~20000sccm when starting, later you can lower this to 100x hydrogen flow setpoint. | * When first opening the valve you will have a small burst of flow, set a high nitrogen flow ~20000sccm when starting, later you can lower this to 100x hydrogen flow setpoint. | ||
| + | * make sure all safety interlocks are met; now you can open the hydrogen safety valve from the GUI | ||
| + | |||
| + | * open manual valves near MFCs of the gasses you would like to use | ||
| * set other process parameters with the GUI | * set other process parameters with the GUI | ||
| * load temperature program from itools to the controller and run the program | * load temperature program from itools to the controller and run the program | ||
| + | * hold the run/hold button for a few seconds to stop the controller, if the controller is in hold state the program will not load. | ||
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| * put blind flanges or aluminium foil on the open parts of the system and tube | * put blind flanges or aluminium foil on the open parts of the system and tube | ||
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| + | ===== Common problems ===== | ||
| + | |||
| + | === PLC not connected === | ||
| + | The extra network card in the PC sometimes loses connection. Open the PC and unplug and plug back the network card. Restart the computer. Open the PLC program and try to connect to the PLC. LOGO!SoftComfort will recognize that the IPadres of the PLC is not in the same subnet mask and will ask to add this; acknowledge. Now you should have connection again. | ||
thermcraft_tube_oven.1664355334.txt.gz · Last modified: 2022/09/28 08:55 by scholma