6
Operation
6.1
Operator interface
6.2
Display elements
LED indicators
Indication for relay controlled in “manual” mode (red LED).
Indication for “auto” (green LED) or “manual” (yellow LED) mode.
Indicates the status of relays 1 and 2.
LED green: measured value is within permissible limits, relay is inactive.
LED red: measured value is outside of permissible limits, relay is active.
Alarm indication for continuous limit violation, sensor / process alarm, sensor error,
AD converter overflow or system error.
Liquid crystal display
for display of
measured values and
configuration data
4 main control keys for
calibration and instrument
configuration
Key for displaying
limits and switching
relays or wiper
selection in manual
mode
LED indicator for
alarm function
LED indicators
for switched limit
outputs
um
22
1-
0
1
.cd
r
Key for switching
between automatic /
manual operation
Fig. 6.1
Operating elements of Liquisys CUM 252
Operation
liquisys CUM 252
16
Hauser
