K3HB-R

4

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

Function

Operation

Operation image (application)

F1

Rpm/

circumfer-

ential

speed/

Instanta-

neous

flowrate

Measures frequency for input A and displays the

rotation (rpm) or circumferential speed proportional to

the input frequency.

Display value D = fa

× 60 × α fa: Input frequency (Hz)

N = Pulses per rotation

πd = Circumferential length per rotation (m)

F2

Absolute

ratio

Multiples input B divided by input A ( ) by 100 and

displays the ratio as a percentage (%).

Display unit: %

Measuring the speed ratio between two rollers

Function name

Function No.

Rpm/circumferential

speed

f1

Absolute ratio

f2

Error ratio

f3

Rotational difference

f4

Flow rate ratio

f5

Passing time

f6

Length of

processing stage

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) =

Frequency (f) =

• Rotation speed (rpm) = f

× 60

• Circumferential speed = Roll circumference

× Rotation speed (rpm)

• Passing time=

These calculations are automatically made internally and displayed whenever any input pulse

is received.

T

1

T

Length of processing stage

Circumferential speed

Calculation Display unit

Prescale value (

α)

Rotation

speed

rpm

1/N

rps

1/60 N

Frequency

(of input

pulse)

Hz

1/60

kHz

1/60000

Circumfer-

ential

speed

mm/s

1000

πd/60 N

cm/s

100

πd/60 N

m/s

πd/60 N

m/min

πd/N

km/h

0.06

πd/N

Instanta-

neous

flowrate

l/min

Check the output

specifications of the input

device and calculate the

prescale value from the

following equation:

Display value D = ƒa

× 60

×

α

l/h

H

PASS

L

OK/NG

judgment

Measuring roller winding speed

Measuring motor speed

(for product testing)

B

A

H

HH

PASS

L

LL

Warning