Parameters For Flow Rate Calculation - Wittmann Tempro basic C 90 Translation Of Original Operating Manual

Tempro basic C 90 & Tempro primus C 90
Page 55
The current pressure is measured again 5 seconds after the pump start and saved
as the total pressure. The system then determines the difference between these
two measured values and save it as the pump pressure.
The current flow rate is calculated using the data (max. / min. flow rate, etc.)
entered by the manufacturer in the configuration menu (code 120) and displayed
in menu 5.
If no value has yet been calculated or if the pressure difference is too small (for
instance because the user has not entered any parameter values in the
configuration menu), no flow rate is indicated and "- - -" is displayed.

11.6.2 Parameters for flow rate calculation:

T1 = 30°C:
1p1 (pT1 at Qmax) – pressure at 30°C, valve open
1c1 (Qmax) – flow rate at 30°C, valve open
1p- (pT1 at Pmax) – pressure at closed valve
T2 = 90 / 140°C (maximum temperature of device):
1p2 (pT2 at Qmax) – pressure at max. temperature (90 /140°C), valve open
1c2 (Qmax) – flow rate at max. temperature (90 /140°C) , valve open
1p= (pT2 at Pmax) – pressure at closed valve
BASIC & PRIMUS C90 V 3.0 english / 10.04.2012