4.3
Key functions
CAL key
When the CAL key is pressed, the instrument
prompts for the calibration access code (fixed
setting: 22 for calibration or any other number
to view the calibration data). Acknowledge
with the CAL key to proceed. Use the CAL
key to continue through the calibration
process.
Note:
The calibration data set in function
group C is used for calibration.
ENTER key
The ENTER key has several functions:
–
It calls up the setup menu from the
measuring mode
–
It is used to store (acknowledge) data
entered in setup mode
–
It is used to start calibration (same function
as CAL key).
PLUS key
MINUS key
The PLUS and MINUS keys have the following
functions:
–
They are used to select function groups;
–
to set parameters and numeric values (the
setting speed increases when the key is
held down); and
–
to operate the relays in manual mode (see
chapter 4.2).
–
In the measuring mode, the PLUS key
switches to °F and disables the temperature
display (see chapter 4.7), while the MINUS
key selects the error display (see chapter 4.7).
–
Display of the uncompensated conductivity
value (PLUS key).
REL key
The REL key is used in manual mode to
switch between the relays and the manual
start cleaning function.
AUTO key
This key is used to toggle between the
automatic and manual modes of operation.
Escape function
Press the PLUS and MINUS keys
simultaneously to return to the measuring
mode (in calibration mode: at the end of
calibration). Press the PLUS and MINUS
keys again to return to the main menu.
Locking the hardware
Access to field operation can be locked for
communication via HART or Profibus.
Press the PLUS key and the ENTER key at the
same time to lock the instrument. The code
prompt displays the code 9999.
Unlocking the hardware
To unlock, press the CAL and MINUS keys at
the same time. The code prompt displays the
code 0.
LM253E04.CHP
Liquisys M CLM 223 / 253
Operation
Hauser
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