GAS-PHASE ADSORPTION

9) When the cell has been evacuated, turn on the turbomolecular pump by turning the switch on its control panel to the 4:00 position. The thermocouple gauge should display a rapid decrease in pressure to 1-2 mtorr. If the MKS Baratron gauge does not read zero within its uncertainty of 0.1 torr, consult the instructor for an adjustment. ................
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