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Thermo Fisher Scientific
Operation Manual HM550
• To quit the submenu, press the menu button (fig. 95.9).
• Now continue working with the selected settings.
Note:
If there is no time to reset the internal counter for the coarse filter, it is pos-
sible to ignore the message “CHANGE COARSE FILT.” for the moment.
• For this press the scroll/enter button (fig. 95.8). However, this
means that the counter must still be reset. After further sections, the
message will appear on the display again every 1000 µm.
Note:
It is also possible to check if the filter must be replaced.
• For this open the submenu “coarse filter” in the menu.
• If the message “COARSE FILT. ==> OK” appears on the display,
the entire sum of sections of 50 000 µm has not yet reached.
• However, if the message “COARSE FILT.ꢞꢞꢞꢞꢞ” appears on the
display, the filter must be replaced.
Depending on how often the instrument is used, the micro filter must
be replaced at regular intervals, however, at least every 6 months.
If the internal software detects that the micro filter must be replaced,
the message “CHANGE MICRO FILT.” appears on the display.
• For this, remove the cover for the micro filter (fig. 96.3) which is
placed beside the coarse filter.
• Pull off upper and lower connecting pieces (fig. 96.1) and remove
the micro filter.
• Dispose of the micro filter according to the respective lab regulati-
ons.
Note:
e micro filter is to be understood as a disposable filter and must not be
used again.
• Connect the filter again with the connecting pieces.
Note:
When inserting the filter, please note the correct direction (fig. 96.4). e
arrow on the micro filter must show upwards.
ꢀeplacing the micro filter
Inserting the micro filter
Operating instructions
Option V – Vacutome
