Frequency (Pulse) Flow Calculations LIQUI-VIEW

See below the table to calculate the flow or frequency output for the LVB-P models.

Model	Measuringrange	Flow range [m/s]	Pressure drop	Quantity per pulse @50% FS	Frequency range unfiltered [Hz}	Q0 [l/min]	Kf [(l/min) / f]
LVB-06-P	0.5 .. 10 [l/min]	0.074 ... 1.474	240.00*Q²	0.386 ml	27 ... 426	-0.14	0.0238
LVB-08-P	0.9 .. 15 [l/min]	0.133 ... 2.210	85.00*Q²	0.628 ml	30 ... 384	-0.3	0.0398
LVB-10-P	2.0 .. 40 [l/min]	0.295 ... 5.895	22.50*Q²	1.403 ml	26 ... 473	-0.2	0.085
LVB-15-P	3.5 .. 50 [l/min]	0.290 ... 4.145	6.70*Q²	3.047 ml	20 ... 272	-0.2	0.1843
LVB-20-P	5.0 .. 85 [l/min]	0.265 ... 4.506	2.50*Q²	6.213 ml	14 ... 227	-0.3	0.3754
LVB-25-P	9.0 .. 150 [l/min]	0.283 ... 4.709	0.92*Q²	12.412 ml	12 ... 201	-0.2	0.7467

Legend
Qv	Volume flow rate [l/min]
Q0	Axis intercept [l/min]
Kf	Coefficient frequency output [l/min/f]
f	Frequency [Hz]
Quantiy/Pulse	Quantity per pulse [Litres/Pulse]

Characteristic line formula frequency output unfiltered
QV = Kf * f + Q0

Formula quantity per pulse [litres/pulse]
Quantity = Kf * QV
Pulse 60 * (QV - Q0 )

Examples

Need to know the Frequency output for 17 l/min for the LVB-10-P
17 l/min = 0.0850 * f + (-0.2)
17+(0.2)/0.0850 = 202.35 hz

Find the flow with a certain output 112 Hz for example LVB-20-P
QV = 0.3754 * 112 Hz + (-0.3)
(0.3754*112)+(-0.3)= 41.7448 l/min