Emerson 5081-P Manuel D’Utilisation
1
MODEL 5081-P pH/ORP
SECTION 1.0
DESCRIPTION AND SPECIFICATIONS
SECTION 1.0
DESCRIPTION AND SPECIFICATIONS
• CHOICE OF COMMuNICATION PROTOCOL: HART
®
or F
OuNdATION
Fieldbus.
• LARGE, EASY-TO-REAd two-line display shows the process measurement and temperature.
• SIMPLE MENu STRuCTuRE.
• ROBuST TYPE 4X ENCLOSuRE.
• INTRINSICALLY SAFE dESIGN allows the transmitter to be used in hazardous environments
• SIMPLE MENu STRuCTuRE.
• ROBuST TYPE 4X 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.
• CHANGING FROM pH TO ORP operation takes only seconds.
• AuTOMATIC TWO-POINT BuFFER CALIBRATION reduces errors.
• SOLuTION TEMPERATuRE COMPENSATION converts measured pH to the pH at 25°C.
• CONTINuOuS dIAGNOSTICS monitor sensor performance and warn the user of failure (FAuLT)
• CHANGING FROM pH TO ORP operation takes only seconds.
• AuTOMATIC TWO-POINT BuFFER CALIBRATION reduces errors.
• SOLuTION TEMPERATuRE COMPENSATION converts measured pH to the pH at 25°C.
• CONTINuOuS dIAGNOSTICS monitor sensor performance and warn the user of failure (FAuLT)
or approaching failure (WARNING).
1.1 FEATURES AND APPLICATIONS
The Model 5081 family of transmitters can be used to
measure pH or ORP in a variety of process liquids. The
5081 is compatible with most Rosemount Analytical sen-
sors. See the Specifications section for details.
measure pH or ORP in a variety of process liquids. The
5081 is compatible with most Rosemount Analytical sen-
sors. See the Specifications section for details.
The transmitter has a rugged, weatherproof, corrosion-
resistant enclosure (Type 4X and IP65) of epoxy-painted
aluminum. The enclosure also meets explosion-proof
standards.
resistant enclosure (Type 4X and IP65) of epoxy-painted
aluminum. The enclosure also meets explosion-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.
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
option -FF). digital communications allows access to AMS
(Asset Management Solutions). use AMS to set up and
configure the transmitter, read process variables, and
troubleshoot problems from a personal computer or host
anywhere in the plant.
(model option -HT) and Foundation Fieldbus (model
option -FF). digital communications allows access to AMS
(Asset Management Solutions). use AMS to set up and
configure the transmitter, read process variables, and
troubleshoot problems from a personal computer or host
anywhere in the plant.
A handheld infrared remote controller or the HART Model
375 communicator can also be used for programming and
calibrating the transmitter. The remote controller works
from as far away as six feet.
375 communicator can also be used for programming and
calibrating the transmitter. The remote controller works
from as far away as six feet.
The Model 5081-P Transmitter with the appropriate sensor
can be configured for either pH or ORP (oxidation reduc-
tion potential) measurement of aqueous solutions. Housed
in a Type 4X case, the Model 5081 can be located close to
the sensor even in the harshest environments, including
process, water or wastewater monitoring.
can be configured for either pH or ORP (oxidation reduc-
tion potential) measurement of aqueous solutions. Housed
in a Type 4X case, the Model 5081 can be located close to
the sensor even in the harshest environments, including
process, water or wastewater monitoring.
Advanced features include automatic 2-point buffer cali-
bration routine, automatic recognition of Pt100 or Pt1000
RTd, and menu-selected internal preamplifier. Predictive
sensor diagnostic capability is possible through the
impedance measurement of the pH glass membrane and
reference electrode, fully supported by AMS. Solution
temperature calibration allows the instrument to calculate
and display the pH at 25°C when the temperature coeffi-
cient of the measured liquid is provided.
bration routine, automatic recognition of Pt100 or Pt1000
RTd, and menu-selected internal preamplifier. Predictive
sensor diagnostic capability is possible through the
impedance measurement of the pH glass membrane and
reference electrode, fully supported by AMS. Solution
temperature calibration allows the instrument to calculate
and display the pH at 25°C when the temperature coeffi-
cient of the measured liquid is provided.