Scaling The 4-20 Ma Analog Output (Aout); Gate Function (Gate); Contact Debounce Filter (Filter); Low-Flow Cutoff (Cutoff) - YOKOGAWA YPP6830-AP0-0 Instruction Manual

YPP6830 Explosion-Proof Pulse Input Rate/Totalizer
Scaling the 4-20 mA Analog Output
(Aout)
The Analog Output menu is used to program the
4-20 mA output based on display values.
The 4-20 mA analog output (if equipped) can be
scaled to provide a 4-20 mA signal for any display
range selected for either the rate, total, or grand total.
The output may be disabled (DSABL) and will only
output the minimum signal.
No equipment is needed to scale the analog output;
simply program two display values and corresponding
mA output signals.
•
Please note that when power is removed from the
meter, the analog output will drop below 1 mA.
•
Take this effect into consideration when designing
any system using the 4-20 mA output.

Gate Function (GATE)

The gate function is used for displaying slow pulse
rates. Using the programmable gate, the meter can
display pulse rates as slow as 1 pulse every 9,999
seconds (0.0001 Hz). The gate function can also be
used to obtain a steady display reading with a
fluctuating input signal.
There are two settings for the Gate, low gate (LO) and
high gate (HI).
Low Gate (LO GaTe)
For most applications, low gate setting should be left
at 1 second. Increase low gate setting to obtain a
steadier rate display. The rate display will update in
accordance with the low gate setting, for example if
low gate is set at 10, the display will update every 10
seconds; changes in rate between updates will not
be reflected until next display update.
High Gate (HI GaTE)
Set the high gate value to correspond to the highest
expected pulse period (lowest pulse rate). For
instance if the meter must display a rate when there is
1 pulse coming into the meter every 10 seconds, set
the high gate to 11 seconds. When the signal is
removed from the meter, the display will show the
last reading for 11 seconds; then it will read zero.

Contact Debounce Filter (FILTER)

The filter function (FILTER) can be used for
applications where the meter is set up to count pulses
generated by switch contacts. There are three
settings, HI (high speed), nmed (medium speed), and
LO (low speed). High speed disables the contact
debounce filter and allows any pulse of the minimum
specified width for the selected input type. Press
ENTER when nmeD or LO is displayed to enable the
filter function.
The medium filter ignored signals faster than 250 Hz
max, or pulse widths less than 2 ms at 50% duty cycle.
The low filter ignores signals higher than 100 Hz, or
pulse widths less than 5 ms at 50% duty cycle.

Low-Flow Cutoff (CUTOFF)

The low-flow cutoff feature allows the meter to be
programmed so that the often-unsteady output from a
transmitter at low flow rates, always displays zero on
the meter.
The cutoff value may be programmed from 0.1 to
99,999. Below the cutoff value, the meter will display
zero. Programming the cutoff value to zero disables
the cutoff feature.
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Instruction Manual