FRITSCH PULVERISETTE 7 premium line - Manual (Page 5)

5.1.3 Grinding bowl lid............................................................... 31
5.2 Choice of grinding bowls and grinding balls........................ 31
5.2.1 Useful capacity of the grinding bowls............................... 33
5.2.2 Size of the grinding balls................................................... 33
5.2.3 Number of balls per grinding bowl (independent of the
material quantity)............................................................. 34
5.2.4 Calculated weight of a ball................................................ 35
5.3 Impact of the ball size and the material during grinding..... 35
5.4 Filling quantities of grinding bowls...................................... 36
5.5 Filling the grinding bowl....................................................... 36
5.6 Factors with an impact on grinding..................................... 37
5.6.1 Running time (grinding duration)..................................... 37
5.6.2 Speed................................................................................ 37
5.6.3 Reverse mode................................................................... 37
5.6.4 Number and size of the balls............................................ 37
5.6.5 Weight of the balls (type of material)............................... 38
5.7 Dry grinding.......................................................................... 38
5.8 Wet grinding (grinding in a suspension).............................. 38
5.8.1 The effect of high temperature........................................ 39
5.8.2 Safety measures against an excessively high pressure..... 40
5.9 Handling the grinding bowl.................................................. 40
5.9.1 Design............................................................................... 40
5.9.2 Opening the grinding bowl after a grinding operation..... 41
5.9.3 Closing the grinding bowl.................................................. 42
5.9.4 Inserting the grinding bowl in the grinding bowl holder. . 44
5.9.5 Removing the grinding bowl............................................. 45
5.10 Mass balance..................................................................... 47
5.11 Grinding duration............................................................... 47
5.12 Conducting a grinding operation....................................... 48
5.12.1 Program sequence after switching on............................ 49
5.12.2 Starting grinding at high speed....................................... 52
5.12.3 Overload......................................................................... 53
5.12.4 "Program" menu item..................................................... 53
5.12.5 Saving the current data................................................... 54
5.12.6 Loading the program....................................................... 54
5.12.7 Setting the time control.................................................. 55
5.12.8 Imbalance check............................................................. 56
5.12.9 Switching off................................................................... 57
5.12.10 Cooling the grinding bowl............................................. 58
6 Accessories................................................................................... 59
6.1 Standard gassing lid for grinding with inert gas................... 59
6.1.1 Scope of delivery............................................................... 59
6.1.2 Fitting the gassing lid on the grinding bowl...................... 60
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