K3HB Datasheet, PDF (7/32 Pages) Omron Electronics LLC – Digital Indicators

Operation
■ Functions (Operating Modes)
F1 to F6
Functions F1 to F6 provide rpm/circumferential speed and other calculation displays by measuring continuous pulses (frequencies).
Example
Length of
processing stage
Function name
Rpm/circumferential
speed
Absolute ratio
Error ratio
Rotational difference
Flow rate ratio
Passing time
Function No.
f1
f2
f3
f4
f5
f6
F1:
Displays rotation (rpm) or circumferential speed for one input.
F2 to F5: Displays the calculation result for two rotation (rpm) speeds.
F6:
Displays the passing time calculated from the circumferential speed and the length
of the processing stage for one input.
The basic principle used by the Digital Indicator to calculate the rotation speed (rpm) display is
to count the ON/OFF time (T) for input sensor or other device inputs using the internal system
clock, and then automatically calculate the frequency. This frequency (f) is multiplied by 60 and
displayed as the rotation (rpm) speed.
Input sensor or other input pulse ON/OFF time (T) =
T
Frequency (f) =
1
T
• Rotation speed (rpm) = f × 60
• Circumferential speed = Roll circumference × Rotation speed (rpm)
• Passing time= ^{Length of processing stage}
Circumferential speed
These calculations are automatically made internally and displayed whenever any input pulse
is received.
Function
Operation
F1
Rpm/cir-
cumferen-
tial speed/
Instanta-
neous
flowrate
Measures frequency for input A and displays the
rotation (rpm) or circumferential speed proportional to
the input frequency.
Calculation
Rotation
speed
Display
unit
rpm
rps
Prescale value (α)
1/N
1/60 N
Frequency (of
input pulse)
Circumferenti
al speed
Hz
kHz
mm/s
cm/s
m/s
m/min
1/60
1/60000
1000 πd/60 N
100 πd/60 N
πd/60 N
πd/N
Instantaneous
flowrate
km/h
l/min
l/h
0.06 πd/N
Check the output
specifications of the input
device and calculate the
prescale value from the
following equation:
Display value D = ƒa × 60 ×
α
N = Pulses per rotation
πd = Circumferential length per rotation
Operation image (application)
Measuring roller winding speed
Measuring motor speed
(for product testing)
H
PASS
L
OK/NG
judgment
Rotary Pulse Indicator K3HB-R
7