Fluid Components International CMB - Manual (Page 64)

13.5.3 Mass flow QM limit MIN
The MIN limiting value for mass flow can be evaluated via the status output. You enter the value as a
percentage of the set upper-range value. If the mass flow is lower than that limit value, the status output
will be set in case the corresponding assignment has been made. If the alarm function has also been
activated for the assigned current output, the applied current will change to < 3.2 mA or > 20.5 mA /
22 mA. After choosing the Mass flow QM limit MIN function and pressing
↵, the following selection field
will be displayed:
Mass flow limit
MIN = 10 %
The current MIN upper-range value for mass flow will be displayed. According to the description in Sec-
tion 12.4.3.2 Input window/modify a value, the current value can be changed.
13.5.4 Mass flow QM limit MAX
The MAX limiting value for mass flow can be evaluated via the status output. You enter the value as a
percentage of the set upper-range value. If the mass flow surpasses this limit value, the status output will
be set in case the corresponding assignment has been made. If the alarm function has also been acti-
vated for the assigned current output, the applied current will change to < 3.2 mA or > 20.5 mA / 22 mA.
After choosing the Mass flow QM limit MAX function and pressing
↵, the following selection field will be
displayed:
Mass flow limit
MAX = 90 %
The current MAX upper-range value for mass flow will be displayed. According to the description in Sec-
tion 12.4.3.2 Input window/modify a value, the current value can be changed.
13.5.5 Mass flow QM limit hysteresis
The hysteresis of the QM limiting values is the flow rate in percent based on the upper-range value and
indicates the value which must fall below or surpass the set limiting values in order to activate or deacti-
vate the function. The hysteresis of the QM limiting values can be set in 1-percent increments from 0 to
10 %. After choosing the Mass flow QM limit hysteresis function and pressing
↵, the following selection
field will be displayed:
Mass flow limit
Hysteresis 00 %
The current hysteresis value will be displayed. According to the description in Section 12.4.3.2 Input win-
dow/modify a value, the current value can be changed.
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