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The instruments in the lab need to be turned on in this order: (1) HASKRIS and (2) D4. The HASKRIS cools the water supplied to the D4 to prevent the X-ray tube from overheating. Turning the D4 on prematurely will damage the X-ray tube.

Procedure

Turning on Haskris and Bruker D4

1. Flip the "On" switch (Figure 1C) to the HASKRIS and the water in the tank will begin to cool. The water temperature needs to reach 69°F (Figure 1A). The Haskris temperature can range between 65°F to 69°F. Ensure all water valves to/from has kris are open.
   
   

   

   Figure 1. HASKRIS Control Panel. (A) Actual temperature. (B) Set temperature. (C) On/Off switch. (D) Flow meter

   
   
   
2. Flip the ON switch (Figure 2A) on the side of the machine.
   1. The solid green "Low Voltage Ready" light (Figure 2F) turns on.
   2. You will hear several beeps and the "System Activity" light (Figure 2D) will start flashing green.
3. Press the "High Voltage Enable" button (Figure 2B).
   1. The "System Activity" light turns green.
   2. An orange "High Voltage Ready" (Figure 2E) light will turn on.

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Figure 10: 8000 mixer mill. An older simplified version of the 8000M. Featured are the safety latch, timer dial, and start/stop button in the middle of the dial.

The main difference between the two mixer mills is the timer. The 8000M timer uses 2 buttons to adjust the minutes (Figure 9B) and seconds (Figure 9C), 2 separate buttons to start (Figure 9D) and manually stop (Figure 9E), and counts down time on the LCD display (Figure 9F). To operate the 8000 mixer mill, turn the knob to the desired time and press the "Start" button in the middle. That button will also stop the mixer mill. The dial does not move automatically, so if it is turned to 5 minutes it will stay there. The dial does not need be set back to 0 to work. 

Grinding Vessels
There are three types of grinding vessels available: alumina ceramic, tungsten carbide, and hardened steel (Figure 11). Tungsten carbide and steel vessels are better for more robust grinding, and alumina ceramic is better for minimizing contamination. Check with the Science Party to see which vessel type is preferred.

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