16 Advanced functions
FLUXUS G801
16.12 Behavior of the alarm outputs
143
UMFLUXUS_G801V1-0EN, 2020-06-26
16.12.4 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. fluctuation 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
switching condition is no longer met. The alarm remains 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.
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 CLR 3 times.
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.
The alarm state can be displayed after the configuration of the alarm outputs and during the measurement. This function
can be activated in the menu item
Special Funct.\SYSTEM settings\Dialogs/Menus
. The activation of this
function is recommended when alarm outputs have to be reconfigured frequently.
• Select the menu item
SHOW RELAIS STAT
.
• Select
on
to activate the alarm state indication.
• Press ENTER.
If the alarm state indication is activated, the alarm output state is displayed after configuring the alarm outputs.
The alarm state indication is structured as follows:
Rx =
, with
x
being the number of the alarm output and
a pictogram according to the table below.
The configuration of the alarm outputs can be repeated by pressing C. When the configuration of the alarm outputs is
finished, press ENTER. The main menu will be displayed.
If the alarm output indication is activated, the alarm state can be displayed during the measurement. Press
or
to scroll through the upper or lower line, respectively, until the alarm state is displayed.
Fig. 16.1: Behavior of a relay when the flow direction changes
Notice!
There is no visual or acoustic indication of alarm output switching.
Special Funct.\SYSTEM settings\Dialogs/Menus\SHOW RELAIS STAT
0
0
+
-
+
-
flow
flow
type
NON-HOLD
type
HOLD
approx. 1 s
reset of the alarm
(3 × CLR)
