Rosemount Manual: XMT Foundation fieldbus Two-Wire pH/ORP Transmitter Abridged | Rosemount Manuals & Guides
Model Solu Comp™Xmt-P-FF/FI
FOUNDATION®Fieldbus Two-Wire
pH/ORP Transmitter
Instruction Sheet
PN 51A-Xmt-P-FF-FI/rev.F
October 2010
ESSENTIAL INSTRUCTIONS
READ THIS PAGE BEFORE PROCEEDING!
Your purchase from Rosemount Analytical, Inc. has resulted in one of the finest instruments available for your
particular application. These instruments have been designed, and tested to meet many national and international standards. Experience indicates that its performance is directly related to the quality of the installation
and knowledge of the user in operating and maintaining the instrument. To ensure their continued operation to
the design specifications, personnel should read this manual thoroughly before proceeding with installation,
commissioning, operation, and maintenance of this instrument. If this equipment is used in a manner not specified by the manufacturer, the protection provided by it against hazards may be impaired.
• Failure to follow the proper instructions may cause any one of the following situations to occur: Loss of life;
personal injury; property damage; damage to this instrument; and warranty invalidation.
• Ensure that you have received the correct model and options from your purchase order. Verify that this manual covers your model and options. If not, call 1-800-854-8257 or 949-757-8500 to request correct manual.
• For clarification of instructions, contact your Rosemount representative.
• Follow all warnings, cautions, and instructions marked on and supplied with the product.
• Use only qualified personnel to install, operate, update, program and maintain the product.
• Educate your personnel in the proper installation, operation, and maintenance of the product.
• Install equipment as specified in the Installation section of this manual. Follow appropriate local and national
codes. Only connect the product to electrical and pressure sources specified in this manual.
• Use only factory documented components for repair. Tampering or unauthorized substitution of parts and
procedures can affect the performance and cause unsafe operation of your process.
• All equipment doors must be closed and protective covers must be in place unless qualified personnel are
performing maintenance.
• If this equipment is used in a manner not specified by the manufacturer, the protection provided by it against
hazards may be impaired.
For additional information, please visit our website at
www.emersonprocess.com/raihome/liquid/.
WARNING
EXPLOSION HAZARD
DO NOT OPEN WHILE CIRCUIT IS LIVE
DO NOT RUB OR CLEAN WITH SOLVENTS
9241589-00/A
MODEL Xmt-P SPECIFICATIONS
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SPECIFICATIONS - GENERAL
Case: ABS (panel mount), polycarbonate (pipe/surface
ount). Both versions are NEMA 4X/CSA 4 (IP65).
Dimensions
Panel (code -10): 6.10 x 6.10 x 3.72 in. (155 x 155 x
94.5 mm)
Surface/Pipe (code -11): 6.23 x 6.23 x 3.23 in. (158
x 158 x 82 mm); see page 5 for dimensions of pipe
mounting bracket.
Conduit openings: Accepts PG13.5 or 1/2 in. conduit fit-
tings
Ambient Temperature: 32 to 122°F (0 to 50°C). Some
degradation of display above 50°C.
Storage Temperature: -4 to 158°F (-20 to 70°C)
Relative Humidity: 10 to 90% (non-condensing)
Weight/Shipping Weight: 2 lb/3 lb (1 kg/1.5 kg)
Display: Two line, 16-character display. Character height:
4.8 mm; first line shows process variable (pH, ORP,
conductivity, % concentration, oxygen, ozone, chlorine, or monochloramine), second line shows process
temperature and output current. For pH/chlorine combination, pH may also be displayed. Fault and warning messages, when triggered, alternate with temperature and output readings.
During calibration and programming, messages,
prompts, and editable values appear on the two-line
display.
Temperature resolution: 0.1°C (≤99.9°C); 1°C (≥100°C)
Hazardous Location Approval: For details, see specifi-
cations for the measurement of interest.
RFI/EMI: EN-61326
Power & Load Requirements: A power supply voltage of
9-32 Vdc at 13 mA is required.
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 Xmt-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 Sensor Failure
High Temperature Warning CPU Failure
Low Temperature Warning Input Warning
ROM Failure Glass Warning
Glass Failure Reference Warning
Reference Failure
Once one of the above is diagnosed, the display will show
a message describing the problem.
Digital Communications:
Fieldbus (pH): Four AI blocks assigned to pH, tem-
perature, 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.
Sira MC070113/00
3
MODEL Xmt-P SPECIFICATIONS
Intrinsic Safety:
Class I, II, III, Div. 1
Groups A-G
T4 Tamb = 50°C
Class I, II, III, Div. 1
Groups A-G
T4 Tamb = 50°C
1180 II 1 G
Baseefa04ATEX0213X
EEx ia IIC T4
Tamb = 0°C to 50°C
Non-Incendive:
Class I, Div. 2, Groups A-D
Dust Ignition Proof
Class II & III, Div. 1, Groups E-G
NEMA 4/4X Enclosure
Class I, Div. 2, Groups A-D
Dust Ignition Proof
Class II & III, Div. 1, Groups E-G
NEMA 4/4X Enclosure
T4 Tamb = 50°C
ATEX
PROCEDURE — QUICK STANDARDIZATION CALIBRATION
The pH measured by the transmitter can be changed to match the reading from a second or referee instrument. The
process of making the two readings agree is called standardization.
During standardization, the difference between the two values is converted to the equivalent voltage. The voltage, called
the reference offset, is added to all subsequent measured cell voltages before they are converted to pH. If after standardization the sensor is placed in a buffer solution, the measured pH will differ from the buffer pH by an amount equivalent to the standardization offset.
1. Install the pH sensor in the process liquid.
2. Once readings are stable, measure the pH of the liquid using a referee instrument.
3. Because the pH of the process liquid may change if the temperature changes, measure the pH of the grab sample
immediately after taking it.
4. For poorly buffered samples, it is best to determine the pH of a continuously flowing sample from a point as close as
possible to the sensor.
5. From the main display, press ENTER 3 times within 5 seconds.
6. The top line shows the present reading. Use the arrow keys to change the
pH reading in the second line to match the pH reading from the referee
instrument.
7. The screen at left appears if the entered pH was greater than 14.00 or if
the mV offset calculated by the transmitter during standardization exceeds
the reference offset limit programmed into the transmitter. The display then
returns to the main display. Repeat the standardization. To change the reference offset from the default value (60 mV), see section 7.4.
8. If the entry was accepted the display returns to the main display.
*Quick Standardization allows the Xmt-P-FF Fieldbus Transmitter to be standardized without the need to set the
Transducer Block to the Out of Service Mode. The measured pH status remains good and prevents any subsequent
function blocks linked to the Transducer Block from going to the Out of Service Mode, or exhibiting spurious block errors.
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5. Choose the desired language. Select >> to show more choices.
6. Choose measurement: pH, ORP, or Redox.
7. Choose preamplifier location. Select Xmtr to use the integral preamplifier in the
transmitter; select Sensor/JBox if your sensor has an integral preamplifier or if
you are using a remote preamplifier located in a junction box.
8. Choose temperature units: °C or °F.
9. To change output settings, to scale the 4-20 mA output, to change measurement-related settings from the default values, and to set security codes, press
MENU. Select Program and follow the prompts. Refer to the appropriate menu
tree (page 11).
10. To return the transmitter to default settings, choose ResetAnalyzer in the
Program menu.
Measure?
pH
Redox ORP
Use Preamp in?
Xmtr
Sensor/JBox
Temperature in?
°C °
F
1. Refer to page 5 for installation instructions.
2. Wire pH or ORP sensor to the transmitter. See Figure 6 for panel mount; Figure 7 for pipe or surface mount. Refer
to the sensor instruction sheet for details.
3. Once connections are secure and verified, apply power to the transmitter.
4. When the transmitter is powered up for the first time, Quick Start screens appear. Using Quick Start is easy.
a. A blinking field shows the position of the cursor.
b. Use the ⇐ or ⇒ key to move the cursor left or right. Use the ⇑ or ⇓ key to move the cursor up or down or to
increase or decrease the value of a digit. Use the ⇑ or ⇓ key to move the decimal point.
c. Press ENTER to store a setting. Press EXIT to leave without storing changes. Pressing EXIT also returns the
display to the previous screen.
QUICK START GUIDE
FOR MODEL SOLU COMP Xmt-P-FF/FI TRANSMITTER
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