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2 Explanation of the most important key functions, FAQs
2.1 Levels and rights of access
The ERZ 2000 system provides three access levels to change parameters or device settings. The lowest level
is the user level which is protected by code. It is marked B, C or P in the documentation.
The second level is protected by the official calibration lock in the form of a sealable turn switch. It is
marked E in the documentation.
The higher level is the special-purpose level (superuser) which is reserved for type changes, etc. The special-
purpose level can be reached by entering the code and by additionally opening the calibration lock. It is
marked S in the documentation.
A symbol (point, rhombus or blank) indicates whether a value displayed can be edited. The symbol is located
between the line information and the text, e.g.
Any column, line 2:
02 Input value
Blank: Value cannot be edited
Any column, line 9:
09 • Lower alarm limit
Point: Value can be edited but is locked by means of the user code or the official calibration lock
09 ♦ Lower alarm limit
Rhombus: Value has been enabled for editing.
2.1.1
Display modes, user profiles and visibility levels
Dynamic hiding or showing of displays in the coordinate system depends on several factors. Firstly, the
device type set (ERZ 2004, ERZ 2104, etc.) determines which functions are relevant and only those are
shown.
Secondly, there are visibility levels which can make further restrictions. These levels have been given names
which correspond to the scope or range of displays shown.
The lowest level is the "Gas meter reader" who can access only a few useful displays or overviews via the
keyboard while the rest cannot be accessed by him/her. This level can be selected by the user.
The next level up is the standard setting and is named "User". With this setting, all measured values,
parameters, auxiliary quantities, etc. which are useful for the selected device type and the chosen operating
modes are visible and can be edited.
Above this level there is another level which is called "Service". At the service level, there is no dynamic
hiding or showing as with the "User" level and the service staff can view all values even those which are not
directly needed in the current operating mode.
The topmost level is the "Developer" user profile. In this mode, additional auxiliary quantities and
intermediate values are shown which may be useful for diagnostic purposes if a fault occurs.
You can select the visibility level with the <0> Mode key in the Display chapter.
We would recommend setting the visibility level at "Service" before you start to parameterize
the device.
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