Process Unit 73 LF - Knick

Complete Installation using all
Functions
Fig. 9–9, page 9–26 shows how to connect the
Process Unit 73 LF if you want to make use of all
measurement and control capabilities.
Alarm Settings
You can define alarm limits for each of the following
process variables:
conductivity
concentration (only with option 359, 360, 382)
measured temperature
cell constant
input current at current input
(only when used as signal input)
feeding time (controller output: 100 %)
(only with controller enabled)
You can define four independent alarm limits for
each of these variables (except feeding time):
Failure Limit Lo
If the measured value falls below this limit,
NAMUR contact ”Failure” will be activated, the
display will read ”FAIL”.
Warning Limit Lo
If the measured value falls below this limit,
NAMUR contact ”Warning” will be activated, the
display will read ”WARN”.
Warning Limit Hi
If the measured value exceeds this limit,
NAMUR contact ”Warning” will be activated, the
display will read ”WARN”.
Failure Limit Hi
If the measured value exceeds this limit,
NAMUR contact ”Failure” will be activated, the
display will read ”FAIL”.
The activated alarm messages can be read in the
Diagnostics menu ”Message List” (see page 3–2).
Furthermore, you can enable or disable the alarm
messages for each measured variable. The alarm
Capabilities 9–27