17 Outputs FLUXUS F808, F809
UMFLUXUS_F808_8091V1-2-1EN, 2019-08-23 157
17.7.2 Reset and initialization of the alarms
After an initialization, all alarm outputs will be initialized as follows:
Press key CLR three times during the measurement to set all alarm outputs to the idle state. Alarm outputs whose switch-
ing condition is still met will be activated again after 1 s. This function is used to reset alarm outputs of the type HOLD if the
switching condition is no longer met.
By pressing key BRK, the measurement will be stopped and the main menu selected. All alarm outputs will be de-ener-
gized, independently of the programmed idle state.
17.7.3 Alarm outputs during transducer positioning
At the beginning of the transducer positioning (bar graph display), all alarm outputs switch back to the programmed idle
state.
If the bar graph is selected during the measurement, all alarm outputs will switch back to the programmed idle state.
An alarm output of the type HOLD that has been activated during the previous measurement will remain in the idle state af-
ter the transducer positioning if the switching condition is no longer met.
The switching of the alarm outputs into the idle state will not be displayed.
17.7.4 Alarm outputs during the measurement
An alarm output with switching condition MAX or MIN will be updated max. once per second to avoid humming (i.e. fluctua-
tion of the measured values around the value of the switching condition).
An alarm output of the type NON-HOLD will be activated if the switching condition is met. It will be deactivated if the switch-
ing condition is no longer met. The alarm will remain activated for at least 1 s even if the switching condition is met for a
shorter period of time.
Alarm outputs with the switching condition QUANT. will be activated if the limit is reached.
Alarm outputs with the switching condition ERROR will only be activated after several unsuccessful measuring attempts.
Therefore, typical short-term disturbances of the measurement (e.g., switching on of a pump) will not activate the alarm.
Alarm outputs with the switching condition +→- -→+ and the type NON-HOLD will be activated with each change of the flow
direction for approx. 1 s (see Fig. 17.2).
Alarm outputs with the switching condition
+→- -→+ and the type HOLD will be active after the first change of the flow direc-
tion. They can be switched back by pressing 3 times key CLR (see Fig. 17.2).
When adjusting to changed measurement conditions, e.g, a substantial increase of the fluid temperature, the alarm will not
be switched. Alarm outputs with the switching condition OFF will be set automatically to the switching function NO Cont.
Tab. 17.5: Alarm state after an initialization
func OFF
typ NON-HOLD
mode NO Cont.
Limit 0.00
Fig. 17.2: Behavior of a relay when the flow direction changes
flow
type NON-HOLD
type HOLD
reset of the alarm
(3 x key C)
approx. 1 s
flow
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