IFC 110 F V2.0 IFC 110 F-EEx V2.0 - Krohne

Part C Special applications, functional checks, service, and order numbers Sect. 6.56.5 Pulsating flowApplicationDownstream of positive displacement pumps (reciprocating or diaphragm pumps) withoutpulsation damper.Resetting the signal converter, see Sections 4 and 5.Changing the settings• Fct. 3.02 FIELD FREQ. (change the magnetic field frequency)– Stroke frequency less than 80 strokes/min. (at max. pump lift), do not change setting.– Stroke frequency 80-200 strokes/min. (at max. pump lift), change setting to 1/2,only recommended for PROFIFLUX 5000 F (DN 2.5-100 and 1 / 10 ”-4”)and ALTOFLUX 4000 F (DN 10, 15, 50-100 and 1 / 10 ”, 1 / 2 ”, 2”-4”),for other types and sizes please consult factory.– Please note: at stroke frequencies near the limit of 80 strokes/min. additional measurementdeviations of ± 0.5 % of the measuring value may occur occasionally.• Fct. 3.06 APPLICAT. (adapt modulation limit of A/D converter to the application)Change setting of subfunction ”FLOW” to ”PULSATING”.• Fct. 1.04 DISP. FLOW (change display of flow)Change setting to ”BARGRAPH” in order to be able to evaluate the display ripple.• Fct. 1.02 TIMECONST. (change time constant)– Change setting to ”ALL” and set time (t) to seconds.– Recommendation: t [s] =1000min. number of strokes/min.– Example: min. number of strokes during operation = 50 strokes/min.t [s] =100050/min.= 20 sWith this setting, the residual ripple of the display is approx. ± 2 % of themeasuring value. Doubling the time constant reduces the residual ripple ofthe display by a factor of 2.05/2003 IFC 110 F 61