Sartorius Stedim Biotech MD8 airscan, Руководство по эксплуатации, Страница: 31 / 57

8.2 Resetting of default values
If, when calibrating the MD8 airscan, data were entered which are so absurd that they make
it impossible for the instrument to be controlled correctly by the phase controller, it may be
very difficult to recalibrate correctly.
Even though this case is very unlikely, because the consequences would be serious, a hidden
option has been implemented in the MD8 airscan, allowing the service technician to reset the
instrument to its default values.
Procedure:
Switch off the MD8 airscan. While holding down both the
⇒ and STOP keys simultaneously,
switch the instrument on. Do not release the keys until the message “self-testing” is displayed.
Now press the
⇑ key while this message is displayed.
Pressing of the ⇑ key must be made while the “self-testing” message is displayed, as only
then will the display change to “delete data? <Start> = yes”.
By now pressing
ENTER , you confirm this and all data will be overwritten to the default
settings. A self-test is then re- started.
If you press any other key, instead of
ENTER , the MD8 airscan will enter its standard operating
mode without altering the data.
8.3 Service menu
The service menu should only be accessed by authorized service staff. No one other
than authorized service staff should make changes to the service program. Such changes
could result in invalidation of the Validation Certificate supplied with the instrument.
To hinder incorrect usage, access to the service menu has been made difficult.
For information on the combination of keys required to call up this menu in the
“sartorius MD8 ready to start” mode, contact the Sartorius Stedim Biotech Service
Department.
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