3051SFA - Pemit měření regulace elektro automatizace

3051SFA - Pemit měření regulace elektro automatizace
Product Data Sheet
71-5081/rev.K
April 2006
Model 5081
TWO-WIRE TRANSMITTERS FOR pH, ORP,
CONDUCTIVITY, OXYGEN, OZONE, AND
CHLORINE
Model 5081 Family of Two-wire Transmitters
• 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.
FEATURES AND APPLICATIONS
The Model 5081 family of transmitters can be used to
measure pH, ORP, conductivity (using either contacting or toroidal sensors), resistivity, oxygen (ppm and
ppb level), free chlorine, total chlorine, and ozone in a
variety of process liquids. The 5081 is compatible with
most Rosemount Analytical sensors. See the Specification sections 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 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.
Two digital communication protocols are available:
HART (model option -HT) and Foundation Fieldbus
(model options -FF or -FI). 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 and
Foundation 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.
Model 5081-P pH/ORP Transmitter
• 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).
Model 5081-C Contacting Conductivity Transmitter
• MEASURES CONDUCTIVITY, RESISTIVITY, 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 TEMPERATURE COMPENSATION ALGORITHMS include straight slope, ultrapure water, cation conductivity, and no compensation.
Model 5081-T Toroidal Conductivity Transmitter
• MEASURES CONDUCTIVITY, PERCENT CONCENTRATION, OR
CUSTOM CURVE VARIABLE.
• AUTOMATIC TC RECOGNITION simplifies start up.
• AUTOMATIC/MANUAL TEMPERATURE COMPENSATION ensures
accurate monitoring and control.
• BUILT-IN CONCENTRATION CURVES FOR 0-12% NaOH, 0-15% HCl,
0-25% and 96-99.7% H2SO4.
• PROGRAMMABLE REFERENCE TEMPERATURE enables temperature
compensation to temperatures other than 25 degrees Celsius.
• AUTOMATIC COMPENSATION FOR SENSOR CABLE RESISTANCE
improves accuracy of high conductivity measurements.*
Model 5081-A Amperometric Transmitter
• MEASURES dissolved oxygen (ppm and ppb level), free chlorine,
total chlorine, and ozone.
• SECOND INPUT FOR A pH SENSOR ALLOWS AUTOMATIC pH
CORRECTION for free chlorine measurement. No expensive, messy
reagents needed.
• AUTOMATIC BUFFER RECOGNITON FOR pH CALIBRATION.
*Patent pending
Page 2
SPECIFICATIONS - GENERAL
Enclosure: Cast aluminum containing less than 6%
magnesium, with epoxy polyester coating. NEMA
4X (IP65) and NEMA 7B. Neoprene O-ring cover
seals.
Dimensions: See drawing.
Conduit Openings: ¾-in. NPT
Ambient Temperature: -4 to 149°F (-20 to 65°C)
Storage Temperature: -22 to 176°F (-30 to 80°C)
Relative Humidity: 0 to 95% (non-condensing)
Weight/Shipping Weight: 10 lb/11 lb (4.5/5.0 kg)
Display: Two-line LCD; first line shows process variable (pH, ORP, conductivity, % concentration,
oxygen, ozone, or chlorine), second line shows
process temperature and output current. For
pH/chlorine combination, the second line can
be toggled to show pH. Fault and warning messages, when triggered, alternate with temperature
and output readings.
First line: 7 segment LCD, 0.8 in. (20 mm) high.
Second line: 7 segment LCD, 0.3 in. (7mm) high.
Display board can be rotated 90 degrees clockwise or
counterclockwise.
During calibration and programming, messages and
prompts appear in the second line.
Temperature resolution: 0.1°C
HART option
HART —
Power & Load Requirements:
Supply voltage at the transmitter terminals should be
at least 12 Vdc. Power supply voltage should cover
the voltage drop on the cable plus the external load
resistor required for HART communications (250 Ω
minimum). Minimum power supply voltage is 12 Vdc.
Maximum power supply voltage is 42.4 Vdc (30 Vdc
for intrinsically safe operation). The graph shows the
supply voltage required to maintain 12 Vdc (upper
line) and 30 Vdc (lower line) at the transmitter terminals when the current is 22 mA.
Hazardous Location Approval: For details, see
specifications for the measurement of interest.
Analog Output: Two-wire, 4-20 mA output with
superimposed HART digital signal. Fully scalable
over the operating range of the sensor.
RFI/EMI: EN-61326
Output accuracy: ±0.05 mA
Digital Communications: For details, see specifications for the measurement of interest.
FOUNDATION FIELDBUS —
Power & Load Requirements: A power supply voltage
of 9-32 Vdc at 22 mA is required.
Specifications subject to change without notice.
Fieldbus Intrinsically Safe COncept/FISCO-compliant
versions of Model 5081 Foundation Fieldbus transmitter are available.
Page 3
MODEL 5081-P pH/ORP TRANSMITTER
FEATURES
The Model 5081-P Transmitter with the appropriate sensor can be configured for either pH or ORP (oxidation
reduction potential) measurement of aqueous solutions. Housed in a NEMA 4X and NEMA 7 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 calibration 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 coefficient of the measured liquid is provided.
FUNCTIONAL SPECIFICATIONS
pH Range: 0 to 14
ORP Range: -1400 to +1400mV
Calibrations/standardization: The automatic buffer recognition uses stored buffer values and their temperature curves
for the most common buffer standards available worldwide.
The transmitter also performs a stabilization check on the
sensor in each buffer.
A manual two-point calibration is made by immersing the
sensor in two different buffer solutions and entering the pH
values. The microprocessor automatically calculates the
slope which is used for self-diagnostics. An error message
will be displayed if the pH sensor is faulty. This slope can be
read on the display and/or manually adjusted if desired.
An on-line one-point process standardization is accomplished by entering the pH or ORP value of a grab sample.
Preamplifier Location: A preamplifier must be used to convert the high impedance pH electrode signal to a low impedance signal for transmitter use. The integral preamplifier of
the Model 5081-P may be used when the sensor to transmitter distance is less than 15 ft (4.5 m). Locate the preamplifier in the sensor or junction box for longer distances.
Automatic Temperature Compensation: External 3 or 4
wire Pt 100 RTD or Pt 1000 RTD located in the sensor, compensates the pH reading for temperature fluctuations. Compensation covers the range -15 to 130°C (5 to 270°F).
Manual temperature compensation is also selectable.
Accuracy: ± 1 mV @ 25°C ± 0.01 pH
Repeatability: ± 1 mV @ 25°C ± 0.01 pH
Stability: 0.25% / year @ 25°C
Diagnostics: The internal diagnostics can detect:
Calibration Error
Low Temperature Error
High Temperature Error
Sensor Failure
Line Failure
CPU Failure
ROM Failure
Input Warning
Glass Failure
Glass Warning
Reference Failure
Reference Warning
Once one of the above is diagnosed, the LCD will display a
message describing the failure/default detected.
Digital Communications:
HART (pH): PV assigned to pH. SV, TV, and 4V assignable to pH, temperature, mV, glass impedance, reference impedance, or RTD resistance.
HART (ORP): PV assigned to ORP. SV, TV, and 4V
assignable to ORP, temperature, reference impedance, or RTD resistance.
Fieldbus (pH): Four AI blocks assigned to pH, temperature, reference impedance, and glass impedance.
Fieldbus (ORP): Three AI blocks assigned to ORP,
temperature, and reference impedance.
Fieldbus (pH and ORP): Execution time 75 msec. One
PID block; execution time 150 msec. Device type
4085. Device revision 1. Certified to ITK 4.5.
SENSOR COMPATIBILITY CHART
pH/ORP SENSOR
320HP-58
328A
370
371
372
381 pHE-31-41-52
381+
385+
389-02-54 / 389VP-54
396-54-62 / 396VP
396P-55 / 396PVP-55
396R / 396RVP-54
397-54-62
398-54-62 / 398VP-54
398R-54-62 / 398RVP-54
399-09-62 / 399VP-09
Hx338
Hx348
TF396
Page 4
DIAGNOSTIC CAPABILITY
Glass only
Glass only
Glass only
Glass only
Glass only
Glass only
Glass and Reference
Glass and Reference
Glass only
Glass only
Glass and Reference
Glass and Reference
Glass only
Glass only
Glass only
Glass only
Glass only
Glass only
none
MODEL 5081-P pH/ORP TRANSMITTER
HAZARDOUS LOCATION APPROVAL
Intrinsic Safety:
Class I, II, III, Div. 1
Groups A-G
T4
Tamb = 70°C
Exia Entity
Class I, Groups A-D
Class II, Groups E-G
Class III
T4
ATEX
Tamb = 70°C
0600 II 1 G
Baseefa02ATEX1284
EEx ia IIC T4
Tamb = -20°C to +65°C
Non-Incendive:
Class I, Div. 2, Groups A-D
Dust Ignition Proof
Class II & III, Div. 1, Groups E-G
NEMA 4X Enclosure
Class I, Div. 2, Groups A-D
Suitable for
Class II, Div. 2, Groups E-G
T4
Tamb = 70°C
Explosion-Proof:
Class I, Div. 1, Groups B-D
Class II, Div. 1, Groups E-G
Class III, Div. 1
Class I, Groups B-D
Class II, Groups E-G
Class III
Tamb = 65°C max
Page 5
MODEL 5081-A AMPEROMETRIC TRANSMITTER
FEATURES
The Model 5081-A Transmitter with the appropriate sensor
measures dissolved oxygen (ppm and ppb level), free chlorine, total chlorine, and ozone in a variety of process liquids.
The transmitter is compatible with Rosemount Analytical 499A
amperometric sensors for oxygen, chlorine, and ozone; and
with Hx438 and Gx448 steam-sterilizable oxygen sensors.
For free chlorine measurements, both automatic and manual
pH correction are available. pH correction is necessary
because amperometric chlorine sensors respond only to
hypochlorous acid, not free chlorine, which is the sum of
hypochlorous acid and hypochlorite ion. To measure free
chlorine, most competing instruments require an acidified
sample. Acid lowers the pH and converts hypochlorite ion to
hypochlorous acid. The Model 5081-A eliminates the need for
messy and expensive sample conditioning by measuring the
GENERAL SPECIFICATIONS FOR 5081-A
Input ranges: 0-330 nA, 0.3-4μA, 3.7-30 μA, 27-100 μA
Repeatability (input): ±0.1% of range
Linearity (input): ±0.3% of range
Temperature range: 0-100°C (0-150°C for steam sterilizable
sensors)
Temperature accuracy using RTD: ±0.5°C between 0 and
50°C, ±1°C above 50°C
Temperature accuracy using 22k NTC: ±0.5°C between 0 and
50°C, ±2°C above 50°C
Digital Communications:
HART: PV, SV, TV, and 4V assignable to measurement (oxygen,
ozone, or chlorine), temperature, pH, and sensor current.
Fieldbus: Four (4) AI blocks assignable to measurement
(oxygen, ozone, or chlorine), temperature, pH, and sensor
current; execution time 75 msec. One PID block; execution time 150 msec. Device type: 4083. Device revision: 1.
Certified to ITK 4.01.
SPECIFICATIONS — OXYGEN
Measurement Range: 0-99 ppm (mg/L), 0-200% saturation
sample pH and using it to correct the chlorine sensor signal. If
the pH is relatively constant, a fixed pH correction can be
used, and the pH measurement is not necessary. If the pH is
greater than 7.0 and fluctuates more than about 0.2 units,
continuous measurement of pH and automatic pH correction
is necessary. See Specifications section for recommended pH
sensors. Corrections are valid to pH 9.5.
The transmitter fully compensates oxygen, ozone, free chlorine, and total chlorine readings for changes in membrane
permeability caused by temperature changes.
For pH measurements — pH is available with free chlorine
only — the 5081-A features automatic buffer recognition and
stabilization check. Buffer pH and temperature data for commonly used buffers are stored in the transmitter. Glass impedance diagnostics warn the user of an aging or failed pH
sensor.
pH Correction: Automatic between pH 6.0 and 9.5. Manual pH
correction is also available.
Calibration: against grab sample analyzed using portable test kit.
SENSOR — FREE CHLORINE:
Model 499A CL-01-54
SPECIFICATIONS — pH
Application: pH measurement available with free chlorine only
Measurement Range: 0-14 pH
Resolution: 0.01 pH
Sensor Diagnostics: Glass impedance (for broken or aging
electrode) and reference offset. Reference impedance (for
fouled reference junction) is not available.
Repeatability: ±0.01 pH at 25°C
SENSORS — pH:
Use Model 399-09-62, 399-14, or 399VP-09.
SPECIFICATIONS — TOTAL CHLORINE
Measurement Range: 0-20 ppm (mg/L) as Cl2
Resolution: 0.01 ppm, 0.1 ppb for 499A TrDO sensor
Resolution: 0.001 ppm (Autoranges at 0.999 to 1.00 and 9.99
to 10.0)
Temperature correction for membrane permeability: automatic between 0 and 50°C (can be disabled)
Temperature correction for membrane permeability: automatic between 5 and 35°C (can be disabled)
Calibration: air calibration (user must enter barometric pressure) or calibration against a standard instrument
Calibration: against grab sample analyzed using portable test kit.
SENSORS — OXYGEN:
Model 499A DO-54 for ppm level
Model 499A TrDO-54 for ppb level
Hx438 and Gx448 steam-sterilizable oxygen sensors
SENSOR — TOTAL CHLORINE:
Model 499A CL-02-54 (must be used with SCS 921)
SPECIFICATIONS — OZONE
Measurement Range: 0-10 ppm (mg/L)
SPECIFICATIONS — FREE CHLORINE
Resolution: 0.001 ppm (Autoranges at 0.999 to 1.00 and 9.99
to 10.0)
Measurement Range: 0-20 ppm (mg/L) as Cl2
Resolution: 0.001 ppm (Autoranges at 0.999 to 1.00 and 9.99
to 10.0)
Temperature correction for membrane permeability: automatic between 5 and 35°C (can be disabled)
Temperature correction for membrane permeability: automatic between 0 and 50°C (can be disabled)
SENSOR — OZONE:
Page 6
Calibration: against grab sample analyzed using portable test kit.
Model 499A OZ-54
MODEL 5081-A AMPEROMETRIC TRANSMITTER
HAZARDOUS LOCATION APPROVAL
Intrinsic Safety:
Class I, II, III, Div. 1
Groups A-G
T4
Tamb = 70°C
Exia Entity
Class I, Groups A-D
Class II, Groups E-G
Class III
T4
ATEX
Tamb = 70°C
0600 II 1 G
Baseefa02ATEX1284
EEx ia IIC T4
Tamb = -20°C to +65°C
Non-Incendive:
Class I, Div. 2, Groups A-D
Dust Ignition Proof
Class II & III, Div. 1, Groups E-G
NEMA 4X Enclosure
Class I, Div. 2, Groups A-D
Suitable for
Class II, Div. 2, Groups E-G
T4 Tamb = 70°C
Explosion-Proof:
Class I, Div. 1, Groups B-D
Class II, Div. 1, Groups E-G
Class III, Div. 1
Class I, Groups B-D
Class II, Groups E-G
Class III
Tamb = 65°C max
Page 7
MODEL 5081-C CONTACTING CONDUCTIVITY TRANSMITTER
FEATURES
Housed in a rugged NEMA 4X and NEMA 7 case, the 5081C 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
recognize the type of RTD (Pt100 or Pt1000) being used. Measurements are automatically corrected for the
resistance of the sensor cable to improve accuracy of high conductivity readings. The 5081C provides several
temperature compensation algorithms to ensure optimal performance: linear slope, ultra-pure water (neutral salt),
or cation conductivity. Alternatively, temperature compensation feature can be turned off to provide display of raw
conductivity.
FUNCTIONAL SPECIFICATIONS
Calibration: Calibration is easily accomplished by
immersing the sensor in a known solution and entering its value or entering the cell constant for ultra pure
applications.
Automatic Temperature Compensation:
3-wire Pt 100 or Pt 1000 RTD
Conductivity: 0 to 200°C (32 to 392°F)
Resistivity: 0 to 100°C (32 to 212°F)
Low Conductivity: 0 to 100°C (32 to 212°F)
Diagnostics: The internal diagnostics can detect:
Calibration Error
Zero Error
Temperature Slope Error Low Temperature Error
High Temperature Error Sensor Failure
Line Failure
CPU Failure
ROM Failure
Input Warning
Once one of the above is diagnosed, the LCD will display a message describing the failure/default detected.
Digital Communications:
HART: PV, SV, and TV assignable to measurement
(conductivity, resistivity, or concentration), temperature, and raw conductivity. Raw conductivity is
measured conductivity before temperature correction.
Fieldbus: Three AI blocks assignable to measurement (conductivity, resistivity, or concentration),
temperature, and raw conductivity. Raw conductivity is measured conductivity before temperature
correction. Execution time 75 msec. One PID
block; execution time 150 msec. Device type:
4084. Device revision: 1. Certified to ITK 4.5.
TRANSMITTER SPECIFICATIONS @ 25°C
Measured Range: 0-20,000 μS/cm
Accuracy: ± 0.5% of reading and ± 0.001 μS/cm
Repeatability: ± 0.25% of reading
Stability: 0.25% of output range/month, non-cumulative
Ambient Temperature Coefficient:
± 0.05% of reading/°C
Page 8
Temperature Slope Adjustment: 0-5%/°C
Other temperature compensation algorithms: ultrapure water compensation, cation conductivity, or
raw (uncompensated) conductivity.
Compatible RTD: 100Ω or 1000Ω with Automatic
Recognition
LOOP SPECIFICATIONS
Accuracy: under controlled laboratory conditions at
25°C (77°F) with perfectly calibrated ENDURANCE
sensor of appropriate cell constant:
up to 5,000 μS/cm: ± 1.0% and ± 2 least significant digit
from 5,000 to 20,000: ± 2% of reading and ± 2
least significant digit
SENSOR SELECTION GUIDELINES
Cell Constant
0.01/cm
0.1/cm
1.0/cm
Suggested Conductivity Range
up to 50 μS/cm
1.0 to 500 μS/cm
10 to 20,000 μS/cm
Note: The conductivity values shown in the above chart are
for UNCOMPENSATED (or RAW) conductivity at 25°C.
Maximum range values will vary due to temperature
compensation selection, process temperature, and other
process conditions.
RECOMMENDED SENSORS:
Model
Model
Model
Model
Model
Model
Model
Model
Model
Model
Model
Model
140
141
142
150
400
400VP
401
402
402VP
403
403VP
404
Retractable Conductivity
Insertion High Conductivity
Insertion Low Conductivity
Insertion/Submersion Conductivity
Screw-In Low Conductivity
Screw-In Low Conductivity
Screw-In High Conductivity
Retractable Conductivity
Retractable Conductivity
Sanitary Conductivity
Sanitary Conductivity
Low Flow Conductivity
MODEL 5081-C CONTACTING CONDUCTIVITY TRANSMITTER
HAZARDOUS LOCATION APPROVAL
Intrinsic Safety:
Class I, II, III, Div. 1
Groups A-G
T4
Tamb = 70°C
Exia Entity
Class I, Groups A-D
Class II, Groups E-G
Class III
T4
ATEX
Tamb = 70°C
1180
II 1 G
Baseefa03ATEX0099
EEx ia IIC T4
Tamb = -20°C to +65°C
Non-Incendive:
Class I, Div. 2, Groups A-D
Dust Ignition Proof
Class II & III, Div. 1, Groups E-G
NEMA 4X Enclosure
Class I, Div. 2, Groups A-D
Suitable for
Class II, Div. 2, Groups E-G
T4 Tamb = 70°C
Explosion-Proof:
Class I, Div. 1, Groups B-D
Class II, Div. 1, Groups E-G
Class III, Div. 1
Class I, Groups B-D
Class II, Groups E-G
Class III
Tamb = 65°C max
Page 9
MODEL 5081-T TOROIDAL CONDUCTIVITY TRANSMITTER
FEATURES
Housed in a rugged NEMA 4X and NEMA 7 case, the 5081T measures conductivity or % concentration 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 recognize the type of RTD (Pt100 or Pt1000) being used. Measurements are automatically corrected
for the resistance of the sensor cable to improve accuracy of high conductivity readings. The 5081T is preprogrammed with several percent concentration curves: 0-12% NaOH, 0-15% HCl, 0-30% and 96-99.7% H2SO4.
Temperature compensation choices are linear slope correction or none (to provide display of raw conductivity).
FUNCTIONAL SPECIFICATIONS
TRANSMITTER SPECIFICATIONS @ 25°C
Calibration: Calibration is easily accomplished by
immersing the sensor in a known solution and entering
its value.
Automatic Temperature Compensation:
3-wire Pt 100 RTD
Conductivity: 0 to 200°C (32 to 392°F)
% Concentration: 0 to 100°C (32 to 212°F)
Measured Range*: 50 to 2,000,000 μS/cm (see chart)
Accuracy: ± 1.0% of reading
Repeatability: ± 0.25% of reading
Stability: 0.25% of output range/month,
non-cumulative
Ambient Temperature Coefficient: ± 0.2% of FS/°C
Temperature Slope Adjustment: 0-5%/° C
% Concentration Ranges:
Sodium Hydroxide: 0 to 12%
Hydrochloric Acid: 0 to 15%
Sulfuric Acid: 0 to 25% and 96 to 99.7%
Diagnostics: The internal diagnostics can detect:
Calibration Error
Zero Error
Temperature Slope Error Low Temperature Error
High Temperature Error Sensor Failure
Line Failure
CPU Failure
ROM Failure
Input Warning
Once one of the above is diagnosed, the LCD will display a message describing the failure/default detected.
Digital Communications:
HART: PV, SV, and TV assignable to measurement
(conductivity, resistivity, or concentration), temperature, and raw conductivity. Raw conductivity is
measured conductivity before temperature correction.
Fieldbus: Three AI blocks assignable to measurement (conductivity, resistivity, or concentration),
temperature, and raw conductivity. Raw conductivity is measured conductivity before temperature
correction. Execution time 75 msec. One PID
block; execution time 150 msec. Device type:
4084. Device revision: 1. Certified to ITK 4.5.
LOOP SPECIFICATIONS
Loop Accuracy: With a standard Model 228 or 225
sensor with 20' cable, laboratory accuracy at 25°C
can be as good as ± 2% of reading and ± 50 μS/cm.
To achieve optimum performance, standardize the
sensor in the process at the conductivity and temperature of interest.
Results under real process conditions, at different
temperatures, or using other sensors may differ
from above.
RTD accuracy: Utilizing a perfect 100 Ohm RTD
after 1 point temperature standardization, temperature reading can be as good as ± 0.5°C.
RECOMMENDED SENSORS:
Model
Model
Model
Model
Model
222
225
226
228
242*
Flow-Through
Clean-In-Place (CIP)
Submersion/Insertion
Submersion/Insertion/Retractable
Flow-Through
*no I.S. approval for loops of 5081-T with 242-06 or 242-08
RECOMMENDED RANGES FOR TOROIDAL SENSORS
Conductivity Sensor
Model Number
Nominal Cell Constant
μS/cm)
Minimum Conductivity (μ
μS/cm)
Maximum Conductivity (μ
226
1.0
50
1,000,000
228
3.0
200
2,000,000
225
3.0
200
2,000,000
222 (1in.)
6.0
500
2,000,000
222 (2 in.)
4.0
500
2,000,000
242
*
100*
2,000,000*
* Model 242 values depend on sensor configuration and wiring.
NOTE: Values shown are for 25°C conductivity with a temperature slope of 2% per °C. The maximum range value
will be lower for solutions with a higher temperature slope. Minimum conductivity depends on sensor.
Page 10
MODEL 5081-T CONTACTING TOROIDAL TRANSMITTER
HAZARDOUS LOCATION APPROVAL
Intrinsic Safety:
Class I, II, III, Div. 1
Groups A-G
T4
Tamb = 70°C
Exia Entity
Class I, Groups A-D
Class II, Groups E-G
Class III
T4
ATEX
Tamb = 70°C
0600
II 1 G
Baseefa03ATEX0399
EEx ia IIC T4
Tamb = -20°C to +65°C
Non-Incendive:
Class I, Div. 2, Groups A-D
Dust Ignition Proof
Class II & III, Div. 1, Groups E-G
NEMA 4X Enclosure
Class I, Div. 2, Groups A-D
Suitable for
Class II, Div. 2, Groups E-G
T4 Tamb = 70°C
Explosion-Proof:
Class I, Div. 1, Groups B-D
Class II, Div. 1, Groups E-G
Class III, Div. 1
Class I, Groups B-D
Class II, Groups E-G
Class III
Tamb = 65°C max
Page 11
TRANSMITTER DISPLAY DURING
CALIBRATION AND PROGRAMMING
(FIGURE 1)
1. Continuous display of pH, ORP, conductivity,
oxygen, chlorine, or ozone reading.
1
8
2
F
A
U
L
T
7
2. Units: pH, mV, μS/cm, mS/cm, ppm, ppb, or
% saturation.
3. Current menu appears here.
H
O
L
D
6
4. Submenus, prompts, and diagnostic readings
appear hear.
)c""
pH
3
CALIBRATE PROGRAM DIAGNOSE
/-[5ES-U1
5. Commands available in each submenu or at each
prompt appear here.
6. Hold appears when the transmitter is in hold.
♥
EXIT
5
NEXT
4
ENTER
7. Fault appears when the transmitter detects a sensor or instrument fault.
8.
♥ flashes during digital communication.
FIGURE 1. TRANSMITTER DISPLAY DURING
CALIBRATION AND PROGRAMMING
The program display screen allows access to
calibration and programming menus.
4.
INFRARED REMOTE CONTROLLER
(FIGURE 2)
3.
1. Pressing a menu key allows the user access to
calibrate, program, or diagnostic menus.
2. Press ENTER to store data and settings. Press
NEXT to move from one submenu to the next.
Press EXIT to leave without storing changes.
2.
1.
3. Use the editing keys to scroll through lists of
allowed settings or to change a numerical setting
to the desired value.
4. Pressing HOLD puts the transmitter in hold and
sends the output current to a pre-programmed
value. Pressing RESET causes the transmitter to
abandon the present operation and return to the
main display.
FIGURE 2. INFRARED REMOTE CONTROLLER
HART COMMUNICATION
(FIGURE 3)
Figure 3 shows how HART communication can be
used with the Model 5081-HT. Use HART to configure
and read process variables using the Model 375
HART Communicator, a personal computer, or any
other hosts that support HART communication protocol. HART allows communication through to AMS.
4/20 mA + Digital
250
ohm
Model 5081
Smart
Transmitter
Control System
Hand Held
Communicator
(“Configurator”)
Bridge
FIGURE 3. HART COMMUNICATION
Page 12
Computer
FOUNDATION FIELDBUS (FIGURE 4)
Figure 4 shows a 5081-A-FF being used to measure and control pH and chlorine levels in drinking water. The
figure also shows three ways in which Fieldbus communication can be used to read process variables and configure the transmitter.
FIGURE 4. CONFIGURING MODEL 5081-A TRANSMITTER WITH FOUNDATION FIELDBUS
ASSET MANAGEMENT SOLUTIONS (AMS) (FIGURES 5, 6, and 7)
Rosemount Analytical AMS windows provide access to all transmitter measurement and configuration variables.
The user can read raw data, final data, and program settings and can reconfigure the transmitter from anywhere
in the plant. Figures 5 and 6 show two of the many configuration and measurement screens available using
HART AMS. Figure 7 shows a configuration screen available through AMS Inside using FOUNDATION Fieldbus.
FIGURE 5. AMS CONFIGURATION SCREEN USING HART
Page 13
FIGURE 6. AMS MEASUREMENT SCREEN USING HART
FIGURE 7. AMS INSIDE CONFIGURATION SCREEN USING FOUNDATION FIELDBUS
Page 14
MILLIMETER
INCH
FIGURE 8. MODEL 5081 MOUNTING AND DIMENSIONAL DRAWINGS
Page 15
ORDERING INFORMATION
The Model 5081 Two-Wire Transmitter is intended for the determination of pH/ORP, conductivity (both contacting and toroidal), and for measurements using membrane-covered amperometric sensors (oxygen, ozone, and
chlorine). For free chlorine measurements, which often require continuous pH correction, a second input for a pH
sensor is available. A hand-held infrared remote controller is required for local configuration and calibration of the
transmitter.
MODEL
5081
SMART TWO-WIRE MICROPROCESSOR TRANSMITTER
CODE
P
C
T
A
REQUIRED SELECTION
pH/ORP
Contacting conductivity
Toroidal conductivity
Amperometric (oxygen, ozone, and chlorine)
CODE
HT
FF
FI
REQUIRED SELECTION
Analog 4-20 mA output with superimposed HART digital signal
Foundation Fieldbus digital output
Foundation Fieldbus digital output with FISCO
CODE
20
21
REQUIRED SELECTION
Infrared remote controller included
Infrared remote controller not included
CODE
60
67
AGENCY APPROVALS
No approval
FM approved intrinsically safe, non-incendive (when used with appropriate sensor and safety
barrier), and explosion-proof
CSA approved intrinsically safe, non-incendive (when used with appropriate sensor and safety
barrier), and explosion-proof
ATEX approved intrinsically safe (when used with appropriate sensor and safety barrier)
69
73
5081-P-HT-20-67
EXAMPLE
ACCESSORIES
MODEL/PN
515
230A
23572-00
2002577
9241178-00
Model 375
AMS software
DESCRIPTION
DC loop power supply (see product data sheet 71-515)
Alarm module (see product data sheet 71-230A)
Infrared remote controller (required, one controller can operate any 5081 transmitter)
2-in. pipe mounting kit
Stainless steel tag, specify marking
To order HART Model 375 Communicator, call Rosemount Measurement at (800) 999-9307
To order AMS software, call Rosemount Measurement at (800) 999-9307
Emerson Process Management
Liquid Division
2400 Barranca Parkway
Irvine, CA 92606 USA
Tel: (949) 757-8500
Fax: (949) 474-7250
http://www.raihome.com
© Rosemount Analytical Inc. 2006
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