Metrohm 788 IC Filtration Sample Processor - Manual (Page 81)

4.2 Basic settings
788 IC Filtration Sample Processor
73
4.2.2 Locking keyboard functions
Switch on +
CONFIG
Certain domains of the user dialog can be made inac-
cessible to the novice user by locking particular keys.
For example, the inadvertent overwriting of a method or
even the changing of parameters can be prevented in
this way.
The menu
'>keyboard options' for the corresponding
functions is opened by holding down the <CONFIG>
key while switching on the 788 IC Filtration Sample
Processor. Alternatively, a reset can be executed by
pressing <CLEAR> and then the <CONFIG> key
within 0.4 seconds. This menu is also accessible when
the entire keyboard has been locked
The individual key domains that can be locked are the
following:
>keyboard options
lock keyboard: OFF
ON,OFF
Locking the entire keyboard
If, during routine use, only one particular method is to
be used, it may be desirable to block manual manipula-
tions on the 788 IC Filtration Sample Processor. Almost
all the keys on the keyboard can be locked for this pur-
pose. The <START>, <STOP> and <CLEAR/RESET>
keys however, remain operable so that it is still possible
to start and stop a method. This can also be beneficial
when using the 788 IC Filtration Sample Processor with
a PC software (e.g. «IC Net»). For this application the
keyboard may be disconnected.
>keyboard options
lock configuration: OFF
ON,OFF
Locking <CONFIG> key
The basic configuration of the changer can be pro-
tected from overwriting. All settings of the configuration
menu are no longer accessible at this point.
>keyboard options
lock parameters: OFF
ON,OFF
Locking <PARAM> key
If user methods are generally used, it might be wise to
protect the stored method parameters from alteration.
The parameter menu can then be made inaccessible.