18 Outputs
UMFLUXUS_G8V4-6-1EN, 2018-10-10
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If the switching condition
QUANT.
is selected in the scroll list
func
, the limit of the output will have to be defined:
A positive limit will be compared to the totalizer value for the positive flow direction.
A negative limit will be compared to the totalizer value for the negative flow direction.
The comparison will also take place if the totalizer of the other flow direction is displayed.
18.6.3
Defining the Hysteresis
A hysteresis can be defined for the alarm output R1 to prevent a constant triggering of the alarm due to small fluctuations
of the measured values around the limit. This prevents a constant triggering of the alarm when measured values fluctuate
marginally around the limit.
The hysteresis is a symmetrical range around the limit. The alarm will be activated if the measured values exceed the up-
per limit and deactivated if the measured values fall below the lower limit.
18.7
Behavior of the Alarm Outputs
18.7.1
Apparent Switching Delay
The measured values and the totalizer values will be displayed rounded to 2 decimal places. The limits, however, will be
compared to the non-rounded measured values. This might cause an apparent switching delay when the measured value
changes marginally (less than 2 decimal places). In this case the switching accuracy of the output is higher than the accu-
racy of the display.
Example 2:
Low Limit:
-10 m³/h
volumetric flow rate = -11 m³/h
the measured value is below the limit, the alarm switches
volumetric flow rate = -9.9 m³/h
the measured value is not below the limit, the alarm does not switch
switching condition:
QUANT.
Enter the limit of the totalizer. Press ENTER.
The alarm will switch if the measured value reaches the limit.
Note!
The unit of measurement of the limit corresponds to the unit of measurement of the selected physical
quantity.
If the unit of measurement of the physical quantity is changed, the limit has to be converted and en-
tered again.
Example 1:
physical quantity: volumetric flow rate in m³/h
Quantity Limit:
1 m³
Example 2:
physical quantity: volumetric flow rate in m³/h
Low Limit:
60 m³/h
The unit of measurement of the physical quantity is changed to m³/min. The new limit to be entered is
1 m³/min.
Example:
High Limit:
30 m³/h
Hysterese
: 1 m³/h
The alarm is triggered for measured values > 30.5 m³/h and deactivated for measured values < 29.5
m³/h.
switching condition:
MIN
or
MAX
Enter the value for the hysteresis.
or
Enter 0 (zero) to work without a hysteresis.
Press ENTER.
Quantity Limit:
1.00
m3
R1 Hysterese:
1.00
m3/h
