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Description
The T761 has 12 widely adjustable
input ranges and 2 output ranges,
all of which are field selectable
via top-accessed DIP switches.
The T761 provides 600 VDC of
isolation with outputs of either
4-20mA or 10-50mA. The current
outputs are in proportion to
selected AC voltage or current
input.
The
T761 measures the average value
of the AC input signal and is
calibrated for sine wave signals
over a frequency range of 20Hz
to 3KHz. For other wave forms,
the calibration may be different,
but the T761 will remain linear
for the same wave form. For
example, if the unit is calibrated
using a square wave, the calibration
will be valid for all square
wave inputs in that range. The
maximum DC component of the
input signal is 50% of the range
(e.g., 75VDC is half of a 0-150VAC
range).
The
T761 has 80% zero and span adjustability
within most user- selected input
ranges. For example, Range 3
of Table 1 specifies 0 to 25V
with a minimum span of 5V (25V-5V
= 20V, or 80%). This 80% adjustability
allows the user to field calibrate
the unit from the maximum (0
to 25V) down to any minimum
(5V) span (e.g. 10V to15V) as
long as that adjusted span remains
within the selected 0 to 25V
range.
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Applications
The T761 is useful in any application
requiring the isolation of a
2- wire loop current from an
AC signal source. Typical applications
include AC motor status and
energy management. The output
of the T761 can be used to drive
a digital meter for direct display
or interface with a computer
for monitoring and control.
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