Endress+Hauser Liquisys M CUM253 - Key Assignment and Navigation

Operability Liquisys M CUM223/253
24 Endress+Hauser
5.2.3 Key assignment
CAL key
When you press the CAL key, the device first prompts you for the
calibration access code:
• Code 22 for calibration
• Code 0 or any other code for reading the last calibration data
Use the CAL key to accept the calibration data or to switch from field
to field within the calibration menu.
ENTER key
When you press the ENTER key, the device first prompts you for the
setup mode access code:
• Code 22 for setup and configuration
• Code 0 or any other code for reading all configuration data.
The ENTER key has several functions:
• Calls up the Setup menu from the measuring mode.
• Saves (confirms) data entered in the setup mode.
• Moves on within function groups.
PLUS key and MINUS key
In the setup mode, the PLUS and MINUS keys have the following
functions:
• Selection of function groups.
Press the MINUS key to select the function groups in the order
given in the "System configuration" section.
• Configuration of parameters and numerical values
• Operation of the relay in manual mode
In the measuring mode, you get the following sequence of functions
by repeatedly pressing the PLUS key:
1. Temperature display in F
2. Temperature display hidden
3. Current input signal in %
4. Current input signal in mA
5. Measured value display in FNU or NTU (uncompensated value
without reflection compensation offset and slope, referred to data
set 1)
In the measuring mode, the following is displayed in sequence by
repeatedly pressing the MINUS key:
1. Current errors are displayed in rotation (max. 10).
2. Once all the errors have been displayed, the standard
measurement display appears. In the function group F, an alarm
can be defined separately for each error code.
REL key
In the manual mode, you can use the REL key to switch between the
relay and the manual start of cleaning.
In the automatic mode, you can use the REL key to read out the
switch-on points (for limit contactor) or set points (for PID controller)
assigned to the relay in question.
Press the PLUS key to jump to the settings of the next relay. Use the
REL key to get back to the display mode (automatic return after 30 s).
REL 1
REL 2