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Description
The T798 is a Highway Addressable
Remote Transducer (HART) based
temperature transmitter that
can be factory or field config-
ured using an optional 1 or
2 line alpha-numeric display,
optional PC based software and
cable. Alternatively an HC275
Hand Held Communicator loaded
with the T798 Device Description
from the Hart Foundation Library
can be used.
The
T797 is a programmable temperature
transmitter that can be factory
or field configured using the
same optional 1 or 2 line alphanumeric
display as the T798.
Both
the T798 and T797 accept a wide
variety of thermocouples (B,
C, E, J, K, L, N, R, S, T, U
& special) and 2-wire, 3-wire,
or 4-wire Platinum RTDs (DIN
alpha = 0.00385, SAMA alpha
= 0.003923 and special) as well
as millivolt (mV) and resistance
inputs. They provide an isolated
4-20mA output loop that is proportional
and linear to the desired temperature
input range. The factory can
configure custom curves and
accommodate other input types
including 10 Ohm Copper and
120 Ohm Nickel RTDs.
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Application
The T797 and T798 are ideal
for any application requiring
a 4-20mA two-wire transmitter
loop output in proportion to
a tem- perature, mV or resistance
input. In applications where
the advantages of communications
with a HART based host computer
or hand held terminal unit are
utilized, the T798 proves to
be a valuable solution. It offers
the on line diagnostic functions
and calibration certification
features employed by a growing
number of advanced users. Additionally,
the efficiency advantages of
PC based range programming can
also be realized.
The
T797 with the easy field programming
display option provides a flexible
'off the shelf' solution to
the majority of process temperature
measurement applications, minimizing
inventory requirements for spares.
Either
mounted in an explosion proof
enclosure or wired through intrinsic
safety barriers, the T79X series
can meet the stringent safety
requirements of most hazardous
environments.
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