Omron K3NR - Flow Rate Ratio: F5

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3-5 Flow Rate Ratio: f5
Application example
A
B
Measures the flow rate
ratio of the mixture of A
and B.
Basic Operation
From the frequency of INA and INB, displays the flow rate ratio of INB in percent-
age. Obtain display value D as follows:
D (%) =
f
B
x β
x 100
f
A
x
α
+ f
B
x β
f
A
: Input frequency of INA (Hz)
f
B
: Input frequency of INB (Hz)
α: Prescale value of INA
β: Prescale value of INB
Mode Unit of display Prescale value
Flow rate ratio % INA Na
INB Nb
Where,
Na: Number of pulses for specific quantity of A input
Nb: Number of pulses for specific quantity of B input
Example:
Displaying mixed liquid concentration calculated from the flow rate ratio of
two flow sensors each with a capacity of 10 ȏ/400 rpm.
Prescale value of INA (α) = 10/400 = 0.025 = 2.5000 x 10
–2
Prescale value of INB (β) = 10/400 = 0.025 = 2.5000 x 10
–2
Prescale value = X x 10
Y
(X: mantissa, Y: exponent)
X (mantissa) of input A = 2.5000
Y (exponent) of input A = –2
X (mantissa) of input B = 2.5000
Y (exponent) of input B = –2
Refer to 4-2 Setting Mode.
FUNCTION
SETTING
REFERENCE
Flow Rate Ratio: f5
Section 3-5