FC Flow Computer
74
RELAYS
6.12
RELAYS
Set relay output to be configured. Two or three relay outputs are
available.
Selection:
1 (Relay 1)
2 (Relay 2)
3 (Relay 3, optional)
Display:
1
SELECT RELAY
Both relays (1 and 2, and optional 3rd relay) can be assigned to
various functions as required:
Alarm functions
Relays activate upon exceeding limit setpoints. Freely assignable to
measured or calculated variables or totalizers.
Malfunction
Indication of instrument failure, power loss, etc.
Pulse output
The relays can be defined as additional pulse outputs for totalizer
values such as heat, mass, volume or corrected volume.
Wet steam alarm
The flow computer can monitor pressure and temperature in
superheated steam applications continuously and compare them to
the saturated steam curve. When the degree of superheat (distance
to the saturated steam curve) drops below 5 °C, the relay switches
and the message "WET STEAM ALARM" is displayed.
NOTE:
Relay response time is affected by the value entered for display
damping. The larger the display damping value, the slower the
relay response time will be. This is intended to prevent false
triggering of the relays. Enter a display damping factor of zero
(0) for fastest relay response time.
Selection:
Different selections are available depending on the flow equation
and type of transmitter selected.
HEAT TOTAL, MASS TOTAL,
CORRECTED VOL. TOTAL,
ACTUAL VOLUME TOTAL, HEAT FLOW,
MASS FLOW, COR. VOL. FLOW,
VOLUME FLOW, TEMPERATURE,
TEMPERATURE 2, DELTA TEMPERATURE, PRESSURE,
DENSITY, WET STEAM ALARM, MALFUNCTION, PEAK
DEMAND, DEMAND LAST HOUR
Display:
VOLUME FLOW
RELAY FUNCTION
SELECT RELAY
RELAY FUNCTION
Summary of Contents for FC
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