‘Minimum metering range 0 %’
: Enter the value of the requirement
as a minimum % of the metering range for which this relay is to
operate. The current value here is 0. Possible setting of 0 ... 100%.
‘Maximum metering range 100 %’
: Enter the value of the require‐
ment as a maximum percentage of the metering range for which
this relay is to operate. The current value here is 100. Possible set‐
ting of 0 ... 100%.
‘Metering range - remain active after’
: Select this relay operating
mode if the metering requirement is outside the range entered.
This option is only active if the maximum metering range is less
than 100%. If this option is enabled (checkbox ticked), the relay
continues metering at 100% outside the programmed range, other‐
wise the relay stops metering.
‘Metering range’
: The percentage of the metering range corre‐
sponds to the percentage proportion of the relay metering require‐
ment. This function can be enabled, for example, if you use 2
relays to meter a single parameter. It is possible to program the
first relay for a stop with , for example, active metering of between
30 ... 100 % and the second relay for more powerful metering of
between 30 ... 100 %. It is thus possible to use a low flow pump to
maintain metering and use a pump with a higher flow for more
powerful metering when demand is high.
For a programmed range of 0 ... 50 %, the relay output varies
between 0 .. 100 % between these two limits. If the metering
requirement is 50%, the relay is set to 100% of its metering
capacity.
Metering range of relay 1
Programmed by 0 ... 50 %
Metering range of relay 2
Programmed by 50 ... 100%
0 % 50 % 100 %
% - Relay
100 %
Relay 1 at 100
Relay 2 at 100
Programmed
metering range
A3128
Fig. 81: Example with disabled option to stop metering at relay 1
Setting measuring and control parameters
89
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