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MODEL 5081-T SECTION 1.0
DESCRIPTION AND SPECIFICATIONS
SECTION 1.0
DESCRIPTION AND SPECIFICATIONS
• CHOICE OF COMMUNICATION PROTOCOL: HART or FOUNDATION Fieldbus.
• LARGE, EASY-TO-READ two-line display shows the process measurement and temperature.
• SIMPLE MENU STRUCTURE.
• ROBUST NEMA 4X and NEMA 7B ENCLOSURE.
• INTRINSICALLY SAFE DESIGN allows the transmitter to be used in hazardous environments
(with appropriate safety barriers).
• NON-VOLATILE MEMORY retains program settings and calibration data during power failures.
• MEASURES CONDUCTIVITY, % CONCENTRATION, PPM, OR CUSTOM CURVE VARIABLE.
• AUTOMATIC TC RECOGNITION simplifies start up.
• AUTOMATIC/MANUAL TEMPERATURE COMPENSATION ensures accurate monitoring and control.
• AUTOMATIC COMPENSATION FOR SENSOR CABLE RESISTANCE improves accuracy of high
conductivity/ low resistivity measurements.
• BUILT-IN PERCENT CONCENTRATION CURVES INCLUDE 0-15% NaOH, 0-16% HCl, 0-30%
and 96-99.7% H
2
SO
4
.
1.1 FEATURES AND APPLICATIONS
The Model 5081-T can be used to measure conductivity
in a variety of process liquids. The 5081 is compatible
with most Rosemount Analytical sensors. See the
Specifications section for details.
The transmitter has a rugged, weatherproof, corrosion-
resistant enclosure (NEMA 4X and IP65) of epoxy-painted
aluminum. The enclosure also meets NEMA 7B explo-
sion-proof standards.
The transmitter has a two-line seven-segment display.
The main measurement appears in 0.8-inch (20 mm) high
numerals. The secondary measurement, temperature
(and pH if free chlorine is being measured), appears in
0.3-inch (7 mm) high digits.
Two digital communication protocols are available: HART
(model option -HT) and FOUNDATION Fieldbus (model
options -FF and FI). Digital communications allows
access to AMS (Asset Management Solutions). Use AMS
to set up and configure the transmitter, read process vari-
ables, and troubleshoot problems from a personal com-
puter or host anywhere in the plant.
A handheld infrared remote controller or the HART and
F
OUNDATION Fieldbus Model 375 communicator can also
be used for programming and calibrating the transmitter.
The remote controller works from as far away as six feet.
Housed in a rugged NEMA 4X and NEMA 7 case, the
5081T measures conductivity or resistivity in the harshest
environments. Transmitter can also be configured, using
the "Custom Curve" feature, to measure ppm, %, or a no
unit variable according to a programmable conductivity vs.
variable curve. The transmitter will automatically recog-
nize the type of RTD (Pt100 or Pt1000) being used.
Measurements are automatically corrected for the resist-
ance of the sensor cable to improve accuracy of high con-
ductivity readings. Temperature compensation choices
are linear slope correction or none (display of raw conduc-
tivity.