Grundfos Alldos DDI-209 User Manual - Industry Surplus Australia

Result of weightingIn the example, the following values were entered asreference points L d and H d :L d :mA min. = 6 mA, Q select mA min. = 2 l/hH d :mA max. = 16 mA, Q select mA max. = 8 l/h.The curve for current input/current output nowpasses through Q = 0 at < 6 mA, from Q = 2 l/h at6 mA to Q = 8 l/h at 16 mA, and through Q = 8 l/h at> 16 mA (curve 1d).In the same way, it is possible to enter a currentweighting with a negative gradient. In order to dothis, the value pair for reference point L must first beentered with the smaller mA value followed byreference point H.In the example, the following values were entered asreference points L e and H e :L e :mA min. = 2 mA, Q select mA min. = 12 l/hH e :mA max. = 16 mA, Q select mA max. = 2 l/h.The curve for current input/current output nowpasses through Q = 0 at < 2 mA, from Q = 12 l/h at2 mA to Q = 2 l/h at 16 mA, and through Q = 2 l/h at> 16 mA (curve 1e).Q [l/h]Q select mA mA min. min. e e10 l/h8 l/h1dQ select Q select mA mA max. max. d d6 l/h4 l/hQ select mA min. dselect mA min. dQ select Q select mA mA max. e2 l/h00 mA 4 mA 8 mA 12 mA 16 mA 20 mAI in I[mA]in 1eTM03 6613 4506Fig. 54 Result of weightingNoteThe maximum flow rate of the pumpmust not be exceeded!52