FLUXUS ADM 8027, F801, ADM 8127B
18 Outputs
130
UMFLUXUS_F8V4-6-1EN, 2018-10-10
18.7.2
Reset and Initialization of the Alarms
After an initialization of the transmitter all alarm outputs will be configured 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 is stopped and the main menu is selected. All alarm outputs will be de-energized,
independently of the programmed idle state.
18.7.3
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 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.
Switching of the alarms into the idle state will not be displayed.
18.7.4
Alarm Outputs during 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 min. 1 s even if the switching condition is met for a shorter
period of time.
Alarm output s 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 of the type
NON-HOLD
will be activated with each change of the
flow direction for approx. 1 s (see Fig. 18.2).
Alarm outputs with the switching condition
+
→
- -
→
+
and of the type
HOLD
will be activated after the first change of the flow
direction. They can be switched back by pressing key CLR 3 times (see Fig. 18.2).
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. 18.5: Alarm state after an initialization
func
OFF
typ
NON-HOLD
mode
NO Cont.
Limit
0.00
Fig. 18.2: Behavior of a relay when the flow direction changes
0
0
+
-
+
-
flow
type
NON-HOLD
type
HOLD
reset of the alarm
(3x key CLR)
approx. 1 s
flow
