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Description
The T773 isolating two-wire
transmitter has 5 input ranges
and 2 output ranges, all of
which are field selectable via
top-accessed DIP switches. The
T773 can accept square, triangle
or pulse waveforms up to 18KHz
with amplitudes from 10mVrms
to 35V peak-to-peak. The T773
provides 1000Vrms of transformer-
coupled isolation with outputs
of either 4-20mA or 10-50mA.
Current outputs are in proportion
to a selected frequency input.
The
T773 has 30% zero "turn-up"
and 80% span "turn-down"
adjustments within any user-selected
input range. For example, Range
3 of Table 1 specifies 0 to
2100Hz with a minimum span of
420Hz (2100Hz - 420Hz = 1680Hz,
or 80%). This 80% adjustability
allows the user to field calibrate
the unit for the maximum range
of 0 to 2100Hz down to the minimum
range of 0 to 420Hz. The maximum
obtainable offset is 30% of
the calibrated span: a calibrated
range of 0 of 1000 Hz can be
offset by 300Hz (e.g., 300Hz
to 1000Hz).
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Application
The T773 is useful in any application
requiring isolation of a 2-wire
loop current from a pulse output
transducer, such as a magnetic
pickup or a turbine flowmeter.
The output of the T773 can be
used to drive a digital meter
for direct display of flow or
velocity, or to interface with
a computer or PLC for monitoring
and control applications.
The
T773 is CSA approved for intrinsically
safe operation in Class I, Division
1, Groups A, B, C and D hazardous
locations when installed per
manufacturing drawing number.
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