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--- lindberg_blue_tube_oven [2022/11/24 10:06] – scholma
+++ lindberg_blue_tube_oven [2023/03/31 09:20] (current) – [Oxygen and Argong tube oven annealing] scholma
@@ Line 1: / Line 1: @@
-====== Oxygen tube oven annealing ======
+====== Oxygen and Argon tube oven annealing ======
-The tube oven has a temperature range of up to 1100 °C and can fit 26mm diameter tubes. Temperature regulation is done by a Lindberg/Blue UP150 controller.
+The tube oven has a temperature range of up to 1100 °C and can fit 26mm diameter tubes. Temperature regulation is done by a Lindberg/Blue UP150 controller. \\
+Oxygen and Argon can be connected separately or mixed. Setting the gas flows is done via a needle valve separately for O2 and Ar.
 ====== Notes before usage ======
@@ Line 20: / Line 22: @@
   * Al2O3: 1700°C
-====== Safety ======
-  * high temperature
-  * pressurized gas cylinders
 ==== High temperature safety ====
@@ Line 39: / Line 38: @@
   * check that your tube and sample boat have a higher operating temperature specified than your process temperature
   * load sample and connect tube adaptors
-  * double check reducer is closed
+  * double check pressure reducers on the cylinders are closed
-  * open oxygen cylinder (make sure there is enough oxygen for you proces)
+  * open cylinder(s) you need (make sure there is enough oxygen for you proces)
-  * set 1 bar on secundary pressure gauge
+  * set 1 bar on secondary pressure gauge
-  * set desired flow rate with needle valve
+  * set desired flow rate with needle valve for both gasses separately.
   * setup heater program and start (see below on how to use the temperature controller)
@@ Line 49: / Line 48: @@
       * if you operated in single setpoint mode: turn off oven manually
       * wait until oven temp is below 50°C
-      * close cylinder, keep flow on until pressure on primary and secundary pressure gauges is 0.
+      * close cylinders with the angle key on the top of the cylinder, keep flow on until pressure on primary and secondary pressure gauges is 0. You can increase flow a bit if this takes a long time.
-      * close reducer and needle valve
+      * close manual valves, needle valves and pressure reducers
-      * take out sample and put aluminium foil on parts to keep them clean
+      * take out sample and put a tube back to keep everything clean.
 ==== Using the UP150 temperature controller ====
+{{::temperature_program.jpg?nolink&400|Temperature program with multiple segments}}
+A typical program for us will have three segments, a ramp-up, a dwell and ramp-down segment.\\
+In the ramp-up segment you specify the desired temperature and how fast you want to reach this temperature (do not heat to quickly).\\
+In the dwell segment you set the time how long you want to stay at the desired temperature in hours.\\
+In the ramp-down segment you specify the desired temperature and how fast you want to reach this temperature, since we don't have active cooling, the cooldown rate cannot be made faster.
+=== changing ramp-up segment ===
+  * hold set/ent button for 3 sec to go into the menu
+  * with set/ent button navigate to PrG
+  * set PrG to 1 with ▲
+  * set/ent button to confirm and enter the program
+  * with set/ent button navigate to SP1
+  * change desired temperature with ▼ and ▲, set/ent button to confirm
+  * change Tn1 with ▼ and ▲ (displayed in hours)
+  * hold set/ent button 3 sec to go back to main display
+Start program: hold ▼ for 3sec
-You can operate the temperature controller in two modes:
+Stop program: hold ▲ for 3sec
-  * single setpoint mode: the controller will go to the desired temperature and maintain the temperature indefinitely, you have to turn the oven off manually
-  * programming mode: the user can enter a series of setpoint and time values, the controller will follow the sequence.
-{{lindberg-blue_up150_temperature_controller_manual.pdf|Manual UP150 controller}}
+{{:lindberg-blue_up150_temperature_controller_manual.pdf|Manual UP150 controller}}