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Signal Conditioning Solutions
New Family of Configurable Temperature Transmitters Offers High Performance, Small Size and Low Cost
Dataforth Corporation, Tucson,
Arizona announces the introduction of its new DSCP and SCTP series of external
powered and loop powered configurable temperature transmitters. Three model families
of transmitters, the DSCP20, DSCP80, and SCTP20, are designed around an ASIC chip
specifically engineered for thermocouple and RTD sensor interface. The ASIC design
provides a high degree of versatility, allowing customer configuration of eight
operational functions, selection of 12 industry standard thermocouple types and
two standard RTD types, and selection of 270 input ranges. All sensor inputs are
linearized using a 23-point interpolation table.
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Two transmitters are loop
powered, deriving their power from the input signal. Another accepts external
universal power of either 24 to 60V AC/DC or 85 to 230V AC/DC. Two separate package
designs allow for installation into head mount housings in accordance with DIN
43 729 standard or mounting to DIN rails. Models are available in either non-isolated
or isolated versions. The ASIC based transmitters are designed to protect valuable
measurement and control signals as well as connected equipment from the dangerous
and degrading effects of noise, transient power surges, internal ground loops,
and other hazards present in industrial environments.
The transmitters can be
easily configured to the specific measuring task with a PC, an interface cable
and the menu-driven DSCX-895 configuration software that runs on Windows 3.1x,
95, 98, NT, and 2000. Communication is serial RS-232C, and all models can be configured
with or without their power supply connected. Configurable features include: temperature
units of °C, °F or K, internal or external cold junction compensation for thermocouple
connection, selection of two-, three-, or four-wire RTD, selection of RTD or thermocouple
sensor type and input range adjustment, type of linearization to be applied to
input signal, output response for open or short-circuit sensor or cable failure,
normal or inverted output, ripple suppression for 50Hz or 60Hz, and output time
response. The DSCX-895 configuration software has a comprehensive help file and
allows query, printout and saving of configuration settings, display of input
measurement value, and display of interpolation table points for linearization.
The DSCP20 is a low cost
non-isolated two-wire temperature transmitter, completely powered from the current
loop. It requires a loop supply of 12 to 30VDC and is reverse supply protected.
It is packaged in a compact DIN rail mountable case measuring only 2.44 x 0.67
x 2.56 inches (62 x 17 x 65 mm). Accuracy is better than 0.2%, and operating temperature
range is -25°C to +80°C.
The DSCP80 is an isolated
temperature transmitter, accepting external universal power of either 24 to 60V
AC/DC or 85 to 230V AC/DC. Isolation is 2300Vrms between input and output, and
3700Vrms between either input or output to power supply. Packaging is a compact
DIN rail mountable case measuring only 2.72 x 0.69 x 4.49 inches (69.2 x 17.5
x 114 mm). Accuracy is better than 0.2%, and operating temperature range is -25°C
to +55°C.
The SCTP20 is a two-wire
temperature transmitter in a shape B head-mount package meeting the DIN 43 729
standard. Two model versions are offered; the SCTP20-01 is a low cost non-isolated
version and the SCTP20-02 is a 1500Vrms input to output isolated version. Both
are powered from the current loop and require a loop supply voltage of 12 to 30VDC.
The packages are very small, both measuring only 1.69 inches (43mm) in diameter,
and 0.66 inches (16.8mm) thick for the SCTP20-01 and 1.21 inches (30.8 mm) thick
for the SCTP20-02. Accuracy is better than 0.2%, and operating temperature range
is -25°C to +80°C.
Dataforth Corporation was
established in 1984 and is a worldwide leader in the design and manufacture of
signal conditioning and data communications products for industrial and institutional
markets. The Company offers a broad range of analog and digital I/O modules, two-wire
transmitters, industrial data modems, and modem systems.
Go
directly to our DSCP/SCTP family in our
Signal Conditioning Products Catalog.
Data acquisition. Signal conditioning. Signal conditioners. Thermocouple.
Strain gage. Data loggers. Data logging. PC-based data acquisition.
5B signal conditioning. Dataforth provides all data acquisition and
signal conditioning solutions.
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