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CONFIGURATION MENU
11.5 Water Meter
• Ratio: Set volume per pulse of each water meter or auxiliary meter.
• Type: Define type of flow calculation:
Standard: In this function valves which are operated in a group should be connected to the same water
meter.
Note: If a few valves configured to different water meters will be started simultaneously, the NMC-Pro uses the
flow measured by the water meter connected to the leading valve.
Water source: The NMC-Pro will sum or deduct flow measured simultaneously from a few water meters.
When choosing this function an additional column called "SUM" will appear, this column enables to
define which water meters should be summed and which deducted from the total measured flow.
Note: Flow calculation type is a general definition for all water meters, therefore when changing type of water
meter for one of the water meters the type will be changed for all water meters.
Note: When setting flow calculation (water meter type) to Water source it is not possible to configure valves to
water meters.
• Sum: Define whether flow measured by each water meter should be added to the total measured flow or
deducted:
"+" Flow measured by this water meter will be added to the total measured flow.
"–" Flow measured by this water meter will be deducted from the total measured flow.
Note: Since flow cannot be negative, if the controller measures negative flow it will show zero.
Note: If all valves are set to "–" the system will ignore the measured flow and will use the calculated flow (based
on the nominal flow).
Note: It is very important to choose the correct flow meter for the application. Choosing a wrong flow meter might
result in measurement errors or an inaccurate control. For instructions regarding how to choose the correct water
meter see NMC-Pro Irrigation > General > Flow meter determination.
NMC-PRO Installation Manual
Page
115
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