16 Outputs
118
If the switching condition
func
is selected in the scroll list
QUANT.
, 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.
16.5.3
Defining the hysteresis
A hysteresis can be defined for the alarm output R1. This prevents a constant triggering of the alarm when measured val-
ues 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.
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 when 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
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