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After grinding jars are secured in clamps, the pin is in the closed position and the clear cover is closed it is time to select grinding settings. Program 1 (A) is currently set for 12 min at 25 1/s. This setting is good for clay rich material. Softer sediments such as CaCO3 typically need less time. It is important to only grind soft sediments in the agate jars and hard material should be ground in the shatter box. After Grinding cycle has completed twist knob counter clockwise and pill pin up and into its open position( Figure 18a). Unscrew clamp and open jar to verify grind size. If sediment is still too coarse regrind.
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Figure 19 A) Preset programs. B) The shaker frequency C) The time grinder is set for D) The start and stop
Transferring Powder
After grinding is complete remove grinding jar from clamps. rotate black screw counter clockwise a quarter turn and pull the pin up into the open position (Figure 18a). open pin is in the open position unscrew black knob until grinding gar is loose enough to remove. Unscrew grinding jar, poor powder onto weigh paper or directly into clean and labeled sample bag.
Cleaning the Jars
To clean the jars amd grinding ball rinse with DI water and kim wipes until kimwhipes come out clean. Finish cleaning by rinsing with isopropal alcohol and drying with kim wipe.
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