JFR2
P. / 8
EM-58
EXPLANATIONS OF TERMS & FUNCTIONS
■
LOW-END CUTOUT
The output frequency is forcibly set to 0 Hz when the input
frequency is below the low-end cutout setting by the PU-2x
Programming Unit. It is selectable from 0.3 to 100% of the
selected input frequency range (e.g. 30 Hz – 10 kHz for the
input frequency range 0 – 10 kHz). Use the same unit as
that for the input.
The low-end cutout is reset when the input frequency ex-
ceeds the cutout value by 1%. For example, with the input
frequency range 0 – 100 kHz, the input span frequency 10
kHz and the low-end cutout set to 1 kHz; the output equals
0 Hz while the input is within 0 – 1 kHz. When it goes
higher than 1.1 kHz, the output becomes proportional to the
input.
When the input frequency range setting is changed, the
low-end cutout value is automatically reset to the default
value, 0.3% of the range.
■
SCALING FACTOR, INPUT SPAN FREQUENCY & OUT-
PUT SPAN FREQUENCY
The scaling factor, rate of output frequency divided by input
frequency, are determined by two parameters: input span
frequency and output span frequency.
Although there are also input zero frequency and output
zero frequency, they are fixed to zero (0) Hz.
The output frequency is limited up to 115% of the output
span frequency.
■
INPUT/OUTPUT WAVEFORMS
The figure below shows an example of the output waveform
when the input is changed from 100% to 0% (0 Hz), with the
scaling factor 1 (no scaling).
The output, as shown in the figure, does not drop to 0 Hz im-
mediately after the input does, but rather decreases gradu-
ally down to 0 Hz.
The time required for the output reaches 0 Hz is longer
when the input frequency range is lower.
In general, it becomes shorter when the low-end cutout
value is greater.
INPUT
Input 100%
Input 0%
OUTPUT
Output 100%
Output frequency decreasing
Time
