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Lindburg Tube Furnace Operating Summary and Instructions

Summary

The inside of the Lindberg furnace consists of a white snowy material used as insulation. Please be advised the material is refractory ceramic fibers. LANL treats RCFs like asbestos. Avoid disturbing or creating an aerosol from RCFs. If the RCF is disturbed, clean up using wet methods.

The controller is marked “Micristar” and is located on the bottom right panel of the furnace controller. There are three operating sections on each panel: the upper display, the lower display and the command entry section.

Panel Operating Section

Upper Display- This monitors the set point, process variable, deviation, percent output and five process alarm conditions.

Lower Display- The operator panel is used to monitor and change the basic controller and programmer values required for everyday use operation. The lower display on the primary panel provides a complete set if controller and programmer displays, including all actual and operating parameters.

   
       

Operating Instructions

Start-Up Procedures
     Equipment Set-Up
     Power-Up Response
     Parameter Entry
     To View or Change Existing Programs
     To Check Valve Operation
Operating Procedures
     Manual Operation
     Automatic Operation: Fixed Setpoint
     Automatic Operation: Programmed Setpoint
          Segment Start
          Segment Continue
          Recipe Start
          Time of Day Start

Start-Up Procedures

Equipment Set-Up
  1. Turn on the Micristar controller and programmer by flipping the silver toggle switch on the gray box below the furnace controller.
Power-Up Response

COLD START- In an initial startup or power loss conditions, the controller and programmer parameters are set to a default value. Cold starts are usually “safe” in startup situations because and extraneous parameter values are erased. Check the Cold Start Default Parameters on 3-14 of the Micristar 828 User Manual before continuing.

  1. Turn on gas cylinder and set regulators appropriate to your application.
  2. Turn on the furnace by flipping the black toggle switch marked “Power” in front of the furnace controller.
Parameter Entry

The Micristar’s controller and programmer operating parameters must be entered before the Micristar begins normal operations. These parameters can be entered through the primary panel lower display in FULL ACCESS. For parameter entry procedures, see Section 8 of the Micristar 828 User Manual.

To View or Change Existing Programs

  1. Open front panel.
  2. Push Hidden Buttons 1 and 2
  3. Press PGMR Tables once. Both Controller and Programmer lights should be off.
  4. Press Select until Segment is lit. The description of each program step appears to the right of the LED.
  5. Press ADVANCE or the arrows below the ENTER button until the desired Segment number is displayed.
  6. Press the Select arrows to scroll through the program steps within the segment.
  7. To program the segment:
    1. Press SELECT until the desired program step is lit (such as setpoint or time).
    2. Observe the arrows located beneath the ENTER button. The arrows are lit only when they are active. If the arrows are lit, press them until the desired value is displayed on the screen.
    3. If the arrows are not lit, press ENTER. Each time ENTER is pressed, the display will toggle to a different portion of the program step. The arrows will light up as each portion on the program is displayed. When the arrows light up, press them until the desired value is displayed on the screen.
    4. Repeat a thru c to program remaining steps within the selected segment.
      Note: It is not necessary to press enter to save program changes.
  8. Repeat steps 4 through 7 to view or change steps with other segments.
  9. Close front panel to exit.
To Check Valve Operation

Description of valves:

Event 1 = Valve 1 = N2
Event 2 = Valve 2 = 6%H2/94%Ar
Event 3 = Valve 3 = O2
Remaining Events are unassigned
  1. Verify front cover is closed.
  2. SCROLL arrows until Event 1-4 is selected. Screen will display four bars, representing four events.
  3. Press; ENTER until the desired Event bar is flashing. (Example: third position from left = Valve 3).
  4. Use the arrows beneath the ENTER button to open (up) and close (down) the valve.
  5. When check is complete, press ENTER until all segments stop flashing.
  6. If desired, press SCROLL arrow to display other channels.
Operating Procedures

Manual Operation

Perform all applicable startup procedures (including parameter entry) before manual operation.

  1. Press the CONTROLLER key to select the CONTROLLER function.
  2. Use the lower display SCROLL KEY to select the % OUTPUT display type.
  3. Press the MANUAL/AUTO key if the LED is not on
  4. Press the enter key.
  5. Watch the lower display and press the INC/DEC keys to set the desired output level.
  6. To monitor the process variable, press the upper display scroll key to select the PV display type for the appropriate channel.
Automatic Operation: Fixed Setpoint

Perform all applicable startup procedures (including parameter entry) and control loop tuning before beginning automatic operation.

  1. Select the lower display CONTROLLER function SETPOINT display type.
  2. Press the ENTER key.
  3. Press the INC/DEC keys to select the desired setpoint value.
  4. Press the MANUAL/AUTO key if the LED is on.
  5. The process variable and deviation values can be monitored in the upper display. Press the upper display scroll key to select the desired display type.
Automatic Operation: Programmed Setpoint
SEGMENT START
  1. RUN/HOLD must be in HOLD (HOLD light is on, RUN light is off).
  2. Press RUN
    1. The HOLD light stays on; the Run light begins to blink.
    2. The lower display goes to PROGRAMMER/SEGMENT.
  3. Use the INC/DEC key to select the starting segment.
  4. Press ENTER
    1. If the TOD Start is not armed, the HOLD light goes off, the RUN light goes on, and the run starts at the beginning of the selected starting segment.
    2. If the TOD Start is armed, the HOLD light goes off, the RUN light continues to blink, and the programmer enters a time-of-day-wait state, during which the and events remain at their current values; the setpoint(s) and events cannot be changed without returning to Hold. When the TOD Clock reaches the selected TOD Start setting, the run starts at the beginning of the selected starting segment.
SEGMENT CONTINUE
  1. During a run, press HOLD. The HOLD light goes on and the RUN light goes out.
  2. During the Hold, the PROGRAMMER/SETPOINT (or CONTROLLER/SETPOINT) display can be used to change the setpoint value for each channel.

    The PROGRAMMER/EVENT 1-4 and EVENT 5-8 displays also can be used to change the event settings.

  3. Press RUN to initiate a transfer back to Run. The HOLD light remains on and the RUN light begins to blink.
  4. Press ENTER. The programmer will continue the current segment from the point at which Hold was activated. If either setpoint has been changed during Hold, the programmer will calculate a new increment value to ramp the setpoint smoothly to the segment’s setpoint parameter value (endpoint).

    If any event settings were changed during Hold, those events remain at their current settings when the segment continued.

    Note that if the segment value is changed before pressing ENTER< the programmer starts a new run at the beginning of the selected segment.

RECIPE START
  1. RUN/HOLD must be in HOLD.
  2. Press RECIPE START
    1. The HOLD light remains on; the RUN light begins to blink.
    2. The lower display goes to PROGRAMMER/RECIPE ID.
  3. Select the desired starting segment from the Recipe Id table:

    OPERATOR INTERFACE: Press Recipe select PRIMARY INTERFACE: Press Advance

  4. Press ENTER
    1. If the TOD Start is not armed, the HOLD light goes off, the RUN light goes on, and the run starts at the beginning of the segment selected from the Recipe Id table.
    2. If the TOD Start is armed, the HOLD light goes off, the RUN light continues to blink, and the programmer enters a time-of-day-wait state. During time-of-day wait, the setpoint(s) and events cannot be changed without returning to hold. When the TOD Clock reaches the selected TOD Start setting, the run starts at the beginning of the segment selected from the Recipe Id table.
TIME OF DAY START
  1. The lower display goes to PROGRAMMER/RECIPE ID.
  2. Use the SCROLL key to select the TOD START display.
  3. Press ENTER to make the enabled/disabled field changeable (blinking).
  4. Use the INC/DEC key to toggle the enabled/disabled field to “Y”(enabled).
  5. Press ENTER to make the time field changeable.
  6. Use the INC/DEC and FAST INC/DEC keys to set the TOD Start Time:

    FAST INC/DEC sets the hours digits INC/DEC sets the minutes digits

  7. If desired, Press ENTER to make TOD start display non-changeable (not blinking).
  8. To disable TOD Start, press the ENTER key until the “Y” is changeable (blinking). Press the INC/DEC key so that the “Y” disappears and a flashing blank (“_”) is displayed.



 

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