YOKOGAWA SL1400 - Page 178

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IM 701240-01E
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App
Index
Horizontal and Vertical Axes
Measurement Items (Functions)
The following nine measurement items are available.
Frequency
Frequency (Hz) = 1/Tw (s)
Measurable range: 0.01 Hz to 200 kHz
Period
Period (s) = Tw (s)
Measurable range: 5 µs to 50 s
RPMs/RPSs
• RPMs = Frequency (Hz)/the number of pulses per rotation (Nr) × 60
Measurable range: 0.01 to 100000 rpm
• RPSs = Frequency (Hz)/the number of pulses per rotation (Nr)
Measurable range: 0.001 to 2000 rps
Duty
Duty cycle (%) = Thigh (s)/Tw (s)
Or, duty cycle (%) = Tlow (s)/Tw (s)
Measuring range: 0 to 100%
Pulse Width
Pulse width (s) = Thigh (s)
or pulse width (s) = Tlow (s)
Measurable range: 2 µs to 50 s
Power Supply Frequency
Power supply frequency (Hz) = 1/Tw (s)
Resolution 0.01 Hz
Measurable range: (50 Hz, 60 Hz, or 400 Hz) ± 20 Hz
Pulse Integration (Distance/Flow Rate)
Pulse integrated value = N (count) × physical amount per pulse (I)
Set the physical amount per pulse (I) to distance or flow rate.
A suitable user-defined unit can be assigned to the specified
physical amount.
Measurable range: Up to 2×10
9
count
Velocity
Velocity (km/h) = Distance per pulse l (km)/Tw (s) × 3600
Velocity (m/s) = Distance per pulse l (m)/Tw (s)
The distance and unit can be user defined (angular velocity, etc.).
Measurable range: F (=1/Tw) = 0.01 Hz to 200 kHz
Tw (s)
Thigh (s)
Tw (s)
Tlow (s)
Thigh (s)
Tlow (s)
Tw (s)
N (count)
l
5.17 Setting the Frequency (Number of Rotations, Period, Duty Cycle, Power Supply Frequency, Pulse Width,
Pulse Integration, and Velocity) Measurement
F (Hz)
Nr: The number
of pulses per
rotation
Tw (s)
Distance per
pulse (l)