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WTC 600 LP / MP APPENDIX
Service Handbook 08.2004
4.3 Operating levels
Similar to the operating modes, the user surface has different operating levels:
Normal level:
In this level, the text display shows the operating mode, the operating condition, the current
measured values and operating values as well as special messages (maintenance message) by
means of different (scrolling) masks (see 4.3.1).
User level:
The user level (see 4.3.2) allows operation and setting of the most important functions and
operating settings/parameters respectively as well as the calibration of the conductivity sensors.
Technician's level:
The technician's level is a extended user level: It allows to carry out the functions of the user
level, to manipulate Í all operating settings/parameters and to fulfil a hardware test by means of
a specific diagnostic function.
The different operating levels and their functions as well as the operating options and the
displayed texts (as far as possible) are described below.
4.3.1 Normal level
According to the operating mode, the sequence of displays in the normal level is as follows:
The only operation which is admitted is the acknowledgement of a failure (only for ps
acknowledgment = without password); the purpose is to protect the control system against
unintentional/unauthorized manipulations. When the system is switched on, it always is in the
normal level, so that is also can be called the basic level.