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Description
The AP7500 and AP7501 are useful
in totalizing applications,
where the total number of pulses
counted in a given time period
represents the time integral
of the DC input. If, for example,
the input represents a flow
in gallons per hour, then the
time integral of this flow signal
(total count) will represent
total gallons (see Figure 1).
The AP7500’s 6V square
wave output can be used to drive
electronic counters (DTL, TTL,
CMOS). The AP7501 can be used
to drive electromechanical counters
when connected to an external
AC or DC power source. In the
AP7501, the DPDT relay contacts
are pulsed (closed) for only
a short duration (100 milliseconds)
for compatibility with standard
electromechanical counters.
The AP7500 can also be used
in telemetry systems, where
the dc signal is converted to
a frequency, transmitted over
long lines, and then decoded
at the receiving end by means
of a frequency to DC converter,
such as the AP7380.
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Applications
The AP7500 and AP7501 are useful
in totalizing applications,
where the total number of pulses
counted in a given time period
represents the time integral
of the DC input. If, for example,
the input represents a flow
in gallons per hour, then the
time integral of this flow signal
(total count) will represent
total gallons. The AP7500's
6V square wave output can be
used to drive electronic counters
(DTL, TTL, CMOS). The AP7501
can be used to drive electromechanical
counters when connected to an
external AC or DC power source.
In the AP7501, the DPDT relay
contacts are pulsed (closed)
for only a short duration (100
milliseconds) for compatibility
with standard electromechanical
counters. The AP7500 can also
be used in telemetry systems,
where the dc signal is converted
to a frequency, transmitted
over long lines, and then decoded
at the receiving end by means
of a frequency to DC converter,
such as the AP7380.
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