Display And Operating Elements - Endress+Hauser RTA421 Mode D'emploi

4. Display and operating elements

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Measured value display:
4 digit 7 segment display. Displayed are:
- Dialogue text for setting up
- Actual limit values
- Actual measured value as bargraph or as numeric
percentage after operating "+"or "-" operating keys
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Alarm set point condition:
The numbers 1 and 2 are activated by the built-in relays. Each
alarm condition, high or low is identified by its respective
symbol.
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Relay condition display:
LED yellow, Operating condition to NAMUR NE 44.
- Off, relay inactive
- On, relay active (rest position)
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Enter key:
Entry into operating menu
- selection of operation functions within a function group.
- Saving entered data.
- Start Quick-Set by simultaneous operation with the
"+" key.
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+/- key:
- Selection of function groups within the menu.
- Setting parameters and numeric values.
- Display actual measured value as a percentage
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Operational
indicator:
LED green, illuminated
when power supply is
active.
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Fault indicator:
 LED red, operating
condition indicator to
NAMUR NE 44
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- Off, fault free operation
- On, unit internal fault
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- Flashing, incorrect
Input signal or
cable open circuit,
Meas. range excess or
under cut.
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Contactor
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