4
Operation
4.1
Operator interface
4.2
Display
LED Display
Liquid crystal display
1 8 5
NTU
R262
Setpoint
HAUSER
LIQUISYS M
DISPLAY1E.CDR
Liquid crystal display
for display measured
values and
configurations data
4 main operating keys
for calibration and
instrument configuration
Key for switching
between automatic /
manual operation
LEDs indicators for
limit contactor relay
(switching state)
LED indicator for
alarm function
Display of active
contact and key for
relay switchover
in manual mode
Field for user labelling
Fig. 4.1
Operating elements of
Liquisys M
Indication of current operating mode “Auto” (green LED) or “Manual” (yellow LED)
Indication of controlled relay in “Manual” mode (red LED)
Indicates the state of relays 1 and 2
LED green:
measured value within permissible limits, relay inactive
LED red:
measured value outside permissible limits, relay active
Alarm indication e.g. for continuous limit violation, temperature sensor failure or system error
(see error list chap. 7)
1 8 5
NTU
R262
Setpoint
DISPLAY3.CDR
Measuring mode
indicator (normal
operation)
Calibration
mode indicator
Setup mode
indicator
(configuration)
Error:
error display
In measuring mode:
Secondary measured value.
In setup / calibr. mode
e.g. setting value
In measuring mode:
Main measured value.
In setup / calibr. mode
e.g. parameter
Function coding display
Rel 3/4:
state indicators
inactive
active
“Hold” mode indicator
(outputs reflect last
current state)
For instruments with
communication:
Display to receive
messages.
Constantly visible in
Burst mode (with HART)
Sensor symbol
flashes during
calibration
Fig. 4.2
Liquid crystal display
Operation
Liquisys M CUM 223 / 253
16
Hauser
