Rosemount Manual: XMT HART Two-Wire pH/ORP Transmitter Abridged | Rosemount Manuals & Guides

Model Solu Comp®Xmt-P-HT

HART SMART®Two-Wire pH/ORP
Transmitter

Instruction Sheet

PN 51A-Xmt-P-HT/rev.I
January 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.

CAUTION

If a Model 375 Universal Hart® Communicator is used with these
transmitters, the software within the Model 375 may require
modification.

If a software modification is required, please contact your local
Emerson Process Management Service Group or National Response
Center at 1-800-654-7768.

For additional information, visit our website

at www.emersonprocess.com/raihome/liquid/.

MODEL Xmt-P SPECIFICATIONS

2

Sira MC070113/00

SPECIFICATIONS - GENERAL

Case: ABS. Pipe, surface, and panel mount 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 15 for dimen­sions of pipe mounting bracket.

Conduit openings: Accepts PG13.5 or 1/2 in.

conduit fittings

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

specifications for the measurement of interest.

RFI/EMI: EN-61326

DIGITAL COMMUNICATIONS:

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. 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.

Analog Output: Two-wire, 4-20 mA output with

superimposed HART

®3

digital signal. Fully

scalable over the operating range of the sensor.

Output accuracy: ±0.05 mA

3

MODEL Xmt-P SPECIFICATIONS

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 self­diagnostics. 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-

wire Pt100 RTD or Pt1000 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

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:

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 4088. Device revision 1. Certified to
ITK 4.6.

HAZARDOUS LOCATION APPROVALS

Intrinsic Safety (with appropriate safety barrier):

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

4

5. Choose the desired language. Choose >> 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-HT TRANSMITTER

English

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MODEL Xmt-P INSTALLATION

5

UNPACKING AND INSPECTION

Inspect the shipping container. If it is damaged, contact
the shipper immediately for instructions. Save the box. If
there is no apparent damage, unpack the container. Be
sure all items shown on the packing list are present. If
items are missing, notify Emerson Process Management
immediately.

INSTALLATION

1. Although the transmitter is suitable for outdoor use,

do not install it in direct sunlight or in areas of extreme
temperatures.

2. Install the transmitter in an area where vibrations and

electromagnetic and radio frequency interference are
minimized or absent.

3. Keep the transmitter and sensor wiring at least one

foot from high voltage conductors. Be sure there is
easy access to the transmitter.

4. The transmitter is suitable for panel (Figure 3), pipe

(Figure 4), or surface (Figure 5) mounting.

5. The transmitter case has two 1/2-inch (PG13.5) con-

duit openings and either one or four 1/2-inch knock­outs. The panel mount Xmt-P-HT has four knockouts.
The pipe/surface mount transmitter has two knock­outs*. One conduit opening is for the power/output
cable; the other opening is for the sensor cable.

Figure 1 shows how to remove a knockout. The
knockout grooves are on the outside of the case.
Place the screwdriver blade on the inside of the case
and align it approximately along the groove. Rap the
screwdriver sharply with a hammer until the groove
cracks. Move the screwdriver to an uncracked portion
of the groove and continue the process until the
knockout falls out. Use a small knife to remove the
flash from the inside of the hole.

6. Use weathertight cable glands to keep moisture out to

the transmitter. If conduit is used, plug and seal the
connections at the transmitter housing to prevent
moisture from getting inside the instrument.

7. To reduce the likelihood of stress on wiring connec-

tions, do not remove the hinged front panel (-11 mod­els) from the base during wiring installation. Allow
sufficient wire leads to avoid stress on conductors.

*NEMA plug may be supplied instead of knockout for
pipe/surface version.

FIGURE 1. Removing the Knockouts

FIGURE 2. Power Supply/Current Loop Wiring

MODEL Xmt-P INSTALLATION

6

FIGURE 3. Panel Mount Installation

Access to the wiring terminals is through the rear cover. Four screws hold the cover in place.

Panel Mounting.

MILLIMETER

INCH