Rosemount Analytical Xmt Operating Manual
Solu Comp Xmt-A-HT
HART®SMART Chlorine, Dissolved Oxygen, and Ozone
Transmitter
Instruction Manual
PN 51-Xmt-A-HT/rev.K
March 2012
ESSENTIAL INSTRUCTIONS
READ THIS PAGE BEFORE PROCEEDING!
Rosemount Analytical designs, manufactures, and tests its products to meet many national and international
standards. Because these instruments are sophisticated technical products, you must properly install, use, and
maintain them to ensure they continue to operate within their normal specifications. The following instructions
must be adhered to and integrated into your safety program when installing, using, and maintaining Rosemount
Analytical products. 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.
• Read all instructions prior to installing, operating, and servicing the product. If this Instruction Manual is not the
correct manual, telephone 1-800-654-7768 and the requested manual will be provided. Save this Instruction
Manual for future reference.
• If you do not understand any of the instructions, contact your Rosemount representative for clarification.
• Follow all warnings, cautions, and instructions marked on and supplied with the product.
• Inform and educate your personnel in the proper installation, operation, and maintenance of the product.
• Install your equipment as specified in the Installation Instructions of the appropriate Instruction Manual and per
applicable local and national codes. Connect all products to the proper electrical and pressure sources.
• To ensure proper performance, use qualified personnel to install, operate, update, program, and maintain the
product.
• When replacement parts are required, ensure that qualified people use replacement parts specified by
Rosemount. Unauthorized parts and procedures can affect the product’s performance and place the safe
operation of your process at risk. Look alike substitutions may result in fire, electrical hazards, or improper
operation.
• Ensure that all equipment doors are closed and protective covers are in place, except when maintenance is
being performed by qualified persons, to prevent electrical shock and personal injury.
Emerson Process Management
2400 Barranca Parkway
Irvine, CA 92606 USA
Tel: (949) 757-8500
Fax: (949) 474-7250
http://www.rosemountanalytical.com
© Rosemount Analytical Inc. 2012
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.
5. Choose the desired language. Choose >> to show more choices.
6. Choose type of measurement: Oxygen, Ozone, Free Chlorine, Total Chlorine, or
Monochloramine. To see more choices, move the cursor to >> and press ENTER.
If you chose Oxygen, go to step 6a.
If you chose Ozone, go to step 7a.
If you chose Free Chlorine, go to step 8a.
If you chose Total Chlorine or Monochloramine, go to step 9a.
7a. For Oxygen, select the manufacturer of the sensor, Rosemount or Other. If you chose
Rosemount, go to step 6b. If you chose Other go to step 6c.
7b. Select the application: Water/Waste, Trace Oxygen, or Biopharm. To see more choic-
es, move the cursor to >> and press ENTER.
7c. Choose the units in which you want the oxygen measurement dis-played. If you chose
partialPress (partial pressure), the default units are mm Hg. To select different units,
refer to Section 7.4.
7d. Choose temperature units: °C or °F.
8a. For Ozone, select units: ppm or ppb.
8b. Choose temperature units: °C or °F.
9a. For Free Chlorine, select Auto or Manual pH compensation.
9b. If you selected Manual, enter the pH of the process liquid.
9c. Choose temperature units: °C or °F.
10a.For Total Chlorine and Monochloramine, choose temperature units: °C or °F.
11. To change output settings, to scale the 4-20 mA output, to change pH-related settings
(free chlorine only) from the default values, and to set security codes, press MENU.
Select Program and follow the prompts. For more information refer to section 7.0. For
calibration information, refer to section 8.0.
12. To return the transmitter to default settings, choose ResetAnalyzer in the Program menu.
The menu tree for the Solu Comp Xmt-A-HT is on the following page.
Measurement type
Oxygen
Ozone >>
units?
ppm
%sat ppb >>
units?
ppm
ppb
Application?
Water/Waste
>>
Manufacturer?
Rosemount
Other
Temperature in?
°C °
F
Temperature in?
°C °
F
pH Comp?
Auto
Manual
Manual pH
0
7.00 pH
Temperature in?
°C °
F
Temperature in?
°C °
F
1. Refer to Section 2.0 for installation instructions.
2. Wire sensors to the analyzer. See section 3.0.
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 t or u key to move the cursor left or right. Use the p or q key to move the cursor up or down or to increase or
decrease the value of a digit. Use the p or q 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-A-HT TRANSMITTER
English
Français
Español >>
QUICK START GUIDE
MENU TREE FOR MODEL SOLU COMP Xmt-A-HT TRANSMITTER
Language
i
MODEL XMT-A-HT TABLE OF CONTENTS
MODEL XMT-A-HT MICROPROCESSOR TRANSMITTER
TABLE OF CONTENTS
Section Title Page
1.0 DESCRIPTION AND SPECIFICATIONS ................................................................ 1
1.1 Features and Applications........................................................................................ 1
1.2 Specifications - General........................................................................................... 2
1.3 Specifications - Oxygen ........................................................................................... 4
1.4 Specifications - Free Chlorine.................................................................................. 4
1.5 Specifications - Total Chlorine.................................................................................. 4
1.6 Specifications - Monochloramine ............................................................................. 4
1.7 Specifications - Ozone ............................................................................................ 4
1.8 Transmitter Display During Calibration and Programming ...................................... 5
1.9 HART Communication ............................................................................................. 5
1.10 Ordering Information ............................................................................................... 6
1.11 Accessories ............................................................................................................. 6
2.0 INSTALLATION ....................................................................................................... 7
2.1 Unpacking and Inspection........................................................................................ 7
2.2 Installation................................................................................................................ 7
2.3 Power Supply/Current Loop..................................................................................... 11
3.0 SENSOR WIRING ................................................................................................... 14
3.1 Wiring Model 499A Oxygen, Chlorine, Monochloramine, and Ozone Sensors........ 14
3.2 Wiring Model 499ACL-01 (Free Chlorine) Sensors and pH Sensors....................... 15
3.3 Wiring Model Hx438, Gx448, and Bx438 Sensors................................................... 18
4.0 INTRINSICALLY SAFE AND EXPLOSION PROOF INSTALLATIONS.................. 19
5.0 DISPLAY AND OPERATION ................................................................................... 28
5.1 Display ..................................................................................................................... 28
5.2 Keypad..................................................................................................................... 28
5.3 Programming and Calibrating the Model Xmt — Tutorial......................................... 29
5.4 Security .................................................................................................................... 30
5.5 Using Hold ............................................................................................................... 30
6.0 OPERATION WITH MODEL 375............................................................................. 31
6.1 Note on Model 375 HART Communicator................................................................ 31
6.2 Connecting the HART Communicator...................................................................... 31
6.3 Operation ................................................................................................................. 32
7.0 PROGRAMMING..................................................................................................... 37
7.1 General .................................................................................................................... 37
7.2 Changing Start-up Settings...................................................................................... 37
7.3 Configuring and Ranging the Output ....................................................................... 39
7.4 Choosing and Configuring the Analytical Measurement .......................................... 42
7.5 Making Temperature Settings .................................................................................. 46
7.6 Setting a Security Code ........................................................................................... 47
7.7 Making HART-Related Settings ............................................................................... 48
7.8 Noise Reduction....................................................................................................... 48
7.9 Resetting Factory Calibration and Factory Default Settings .................................... 48
7.10 Selecting a Default Screen and Screen Contrast .................................................... 49
MODEL XMT-A-HT TABLE OF CONTENTS
TABLE OF CONTENTS CONT’D
Section Title Page
8.0 CALIBRATION — TEMPERATURE ........................................................................ 50
8.1 Introduction .............................................................................................................. 50
8.2 Procedure — Calibrating Temperature .................................................................... 51
9.0 CALIBRATION — DISSOLVED OXYGEN .............................................................. 52
9.1 Introduction .............................................................................................................. 52
9.2 Procedure — Zeroing the Sensor ............................................................................ 53
9.3 Procedure — Calibrating the Sensor in Air .............................................................. 54
9.4 Procedure — Calibrating the Sensor Against a Standard Instrument ...................... 56
10.0 CALIBRATION — FREE CHLORINE ..................................................................... 57
10.1 Introduction .............................................................................................................. 57
10.2 Procedure — Zeroing the Sensor ............................................................................ 58
10.3 Procedure — Full Scale Calibration......................................................................... 59
10.4 Dual Slope Calibration ............................................................................................. 60
11.0 CALIBRATION — TOTAL CHLORINE ................................................................... 62
11.1 Introduction .............................................................................................................. 62
11.2 Procedure — Zeroing the Sensor ............................................................................ 63
11.3 Procedure — Full Scale Calibration......................................................................... 64
11.4 Dual Slope Calibration ............................................................................................. 65
12.0 CALIBRATION — MONOCHLORAMINE ............................................................... 67
12.1 Introduction .............................................................................................................. 67
12.2 Procedure — Zeroing the Sensor ............................................................................ 68
12.3 Procedure — Full Scale Calibration......................................................................... 69
13.0 CALIBRATION — OZONE ...................................................................................... 70
13.1 Introduction .............................................................................................................. 70
13.2 Procedure — Zeroing the Sensor ............................................................................ 71
13.3 Procedure — Full Scale Calibration......................................................................... 72
14.0 CALIBRATION — pH .............................................................................................. 73
14.1 Introduction .............................................................................................................. 73
14.2 Procedure — Auto Calibration ................................................................................. 74
14.3 Procedure — Manual Calibration............................................................................. 76
14.4 Procedure — Standardization.................................................................................. 77
14.5 Procedure — Entering a Known Slope Value .......................................................... 78
ii
iii
MODEL XMT-A-HT TABLE OF CONTENTS
TABLE OF CONTENTS CONT’D
Section Title Page
15.0 TROUBLESHOOTING ........................................................................................... 79
15.1 Overview .................................................................................................................. 79
15.2 Troubleshooting When a Fault or Warning Message is Showing ............................ 80
15.3 Troubleshooting When No Fault Message is Showing — Temperature................... 82
15.4 Troubleshooting When No Fault Message is Showing — Oxygen .......................... 83
15.5 Troubleshooting When No Fault Message is Showing — Free Chlorine................. 86
15.6 Troubleshooting When No Fault Message is Showing — Total Chlorine................. 88
15.7 Troubleshooting When No Fault Message is Showing — Monochloramine ............ 89
15.8 Troubleshooting When No Fault Message is Showing — Ozone ............................ 92
15.9 Troubleshooting When No Fault Message is Showing — pH .................................. 94
15.10 Troubleshooting Not Related to Measurement Problems ........................................ 97
15.11 Simulating Input Currents — Dissolved Oxygen...................................................... 97
15.12 Simulating Input Currents — Chlorine and Ozone ................................................... 98
15.13 Simulating Inputs — pH ........................................................................................... 99
15.14 Simulating Temperature........................................................................................... 100
15.15 Measuring Reference Voltage.................................................................................. 101
16.0 MAINTENANCE ...................................................................................................... 102
17.0 RETURN OF MATERIAL......................................................................................... 103
Appendix Title Page
A BAROMETRIC PRESSURE AS A FUNCTION OF ALTITUDE............................... 104
LIST OF TABLES
Number Title Page
7-1 Default Settings ....................................................................................................... 38
iv
MODEL XMT-A-HT TABLE OF CONTENTS
LIST OF FIGURES
Number Title Page
1-1 HART Communication.............................................................................................. 5
2-1 Removing the Knockouts ......................................................................................... 7
2-2 Panel Mount Installation ........................................................................................... 8
2-3 Pipe Mount Installation ............................................................................................. 9
2-4 Surface Mount Installation........................................................................................ 10
2-5 Load/Power Supply Requirements........................................................................... 11
2-6 Power Supply/Current Loop Wiring .......................................................................... 12
2-7 Power & Sensor Wiring Terminals and Wiring Label for Xmt-A-HT Panel Mount ... 12
2-8 Power & Sensor Wiring Terminals and Wiring Label for Xmt-A-HT Pipe/Surface Mount 13
3-1 Xmt-A-HT panel mount; 499A sensors with standard cable .................................... 14
3-2 Xmt-A-HT panel mount; 499A sensors with optimum EMI/RFI cable or Variopol cable 14
3-3 Xmt-A-HT wall/pipe mount; 499A sensors with standard cable............................... 14
3-4 Xmt-A-HT wall/pipe mount; 499A sensors with optimum EMI/RFI cable or ...........
Variopol cable .................................................................................................... 14
3-5 Xmt-A-HT panel mount; free chlorine sensor with standard cable and 399-09-62 .
pH sensor .................................................................................................... 15
3-6 Xmt-A-HT panel mount; free chlorine sensor with standard cable and 399-VP-09
pH sensor .................................................................................................... 15
3-7 Xmt-A-HT panel mount; free chlorine sensor with standard cable and 399-14 pH
sensor .................................................................................................... 16
3-8 Xmt-A-HT panel mount; free chlorine sensor with optimum EMI/RFI cable or ......
Variopol cable and 399-09-62 pH sensor................................................................. 16
3-9 Xmt-A-HT panel mount; free chlorine sensor with optimum EMI/RFI cable or ......
Variopol cable and 399-VP-09 pH sensor................................................................ 16
3-10 Xmt-A-HT panel mount; free chlorine sensor with optimum EMI/RFI cable or ......
Variopol cable and 399-14 pH sensor...................................................................... 17
3-11 Xmt-A-HT wall/pipe mount; free chlorine sensor with standard cable and 399-09-62
pH sensor .................................................................................................... 17
3-12 Xmt-A-HT wall/pipe mount; free chlorine sensor with standard cable and .............
399-VP-09pH sensor................................................................................................ 17
3-13 Xmt-A-HT wall/pipe mount; free chlorine sensor with standard cable and 399-14 .
pH sensor .................................................................................................... 17
3-14 Xmt-A-HT wall/pipe mount; free chlorine sensor with optimum EMI/RFI cable or
Variopol cable and 399-09-62 pH sensor................................................................. 17
3-15 Xmt-A-HT wall/pipe mount; free chlorine sensor with optimum EMI/RFI cable or
Variopol cable and 399-VP-09 pH sensor................................................................ 18
3-16 Xmt-A-HT wall/pipe mount; free chlorine sensor with optimum EMI/RFI cable or
Variopol cable and 399-14 pH sensor...................................................................... 18
3-17 Xmt-A-HT panel mount with Hx438 or Gx448 sensor.............................................. 18
3-18 Xmt-A-HT wall/pipe mount with Hx438 or Gx448 sensor ........................................ 18
3-19 Wiring Model Bx438 to Xmt-A-HT-10....................................................................... 18
3-20 Wiring Model Bx438 to Xmt-A-HT-11 ....................................................................... 18
4-1 FM Intrinsically Safe Installation Label..................................................................... 19
4-2 FM Intrinsically Safe Installation Wiring ................................................................... 20
4-3 CSA Intrinsically Safe Installation Label................................................................... 22
4-4 CSA Intrinsically Safe Installation Wiring ................................................................. 23
About This Document
This manual contains instructions for installation and operation of the Model Solu Comp Xmt-A-HT Dissolved
Oxygen, Chlorine, and Ozone Transmitter.
The following list provides notes concerning all revisions of this document.
Rev. Level Date Notes
A 9/03 This is the initial release of the product manual.
B 12/03 Added note to troubleshooting, p. 70.
C 9/04 Added agency wiring drawings.
D 11/04 Updated mounting drawings.
E 4/05 Revised panel mount drawing.
F 9/05 Added Foundation fieldbus agency approvals and FISCO version.
G 2/06 Revised section 1.0, p. 1, and substituted standard text on 1.2, p.2.
H 6/06 Revised Quick Start choices adding language as #5. Added Language
box to Quick start guide on page D. Deleted 230A in accessories chart on page 5.
I 10/08 Addition of Hazardous Location Approvals.
J 05/10 Include EC Certificates on page 107
K 03/12 Update addresses - mail and web and DNV certificate logo
MODEL XMT-A-HT TABLE OF CONTENTS
LIST OF FIGURES (continued)
Number Title Page
4-5 Baseefa/ATEX Intrinsically Safe Installation Label................................................... 25
4-6 Baseefa/ATEX Intrinsically Safe Installation Wiring ................................................. 26
5-1 Displays During Normal Operation........................................................................... 28
5-2 Solu Comp II Keypad ............................................................................................... 28
6-1 Connecting the HART Communicator ...................................................................... 31
6-2 Xmt-A-HT HART/Model 275 Menu Tree .................................................................. 33
9-1 Sensor Current as a Function of Dissolved Oxygen Concentration ........................ 52
10-1 Sensor Current as a Function of Free Chlorine Concentration ............................... 57
10-2 Dual Slope Calibration ............................................................................................. 60
11-1 Determination of Total Chlorine................................................................................ 62
11-2 Sensor Current as a Function of Total Chlorine Concentration ............................... 62
11-3 Dual Slope Calibration ............................................................................................. 65
12-1 Sensor Current as a Function of Monochloramine Concentration........................... 67
13-1 Sensor Current as a Function of Ozone Concentration........................................... 70
14-1 Calibration Slope and Offset .................................................................................... 72
15-1 Simulate dissolved oxygen....................................................................................... 97
15-2 Simulate chlorine and ozone.................................................................................... 98
15-3 Simulate pH.............................................................................................................. 99
15-4 Three-wire RTD Configuration ................................................................................. 100
15-5 Simulating RTD Inputs ............................................................................................. 100
15-6 Checking for a Poisoned Reference Electrode........................................................ 101
16-1 Exploded View of Model Xmt-A-HT Transmitter ...................................................... 102
v
1
MODEL XMT-A-HT SECTION 1.0
DESCRIPTION AND SPECIFICATIONS
SECTION 1.0
DESCRIPTION AND SPECIFICATIONS
Xmt Family of Two-wire Transmitters
• CHOICE OF COMMUNICATION PROTOCOLS:
HART
®
or FOUNDATION®Fieldbus
• CLEAR, EASY-TO-READ two-line display shows commissioning menus
and process measurement displays in English
• SIMPLE TO USE MENU STRUCTURE
• CHOICE OF PANEL OR PIPE/SURFACE MOUNTING
• NON-VOLATILE MEMORY retains program settings and calibration
data during power failures
• SIX LOCAL LANGUAGES - English, French, German, Italian, Spanish and Portuguese
1.1 FEATURES AND APPLICATIONS
The Solu Comp Xmt 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, monochloramine and ozone in
a variety of process liquids. The Xmt is compatible with
most Rosemount Analytical sensors. See the Specification
sections for details.
The transmitter has a rugged, weatherproof, corrosionresistant enclosure (NEMA 4X and IP65). The panel mount
version fits standard ½ DIN panel cutouts, and its shallow
depth is ideally suited for easy mounting in cabinet-type
enclosures. A panel mount gasket is included to maintain
the weather rating of the panel. Surface/pipe mount enclosure includes self-tapping screws for surface mounting. A
pipe mounting accessory kit is available for mounting to a
2-inch pipe.
The transmitter has a two-line 16-character display. Menu
screens for calibrating and registering choices are simple
and intuitive. Plain language prompts guide the user
through the procedures. There are no service codes to
enter before gaining access to menus.
Two digital communication protocols are available: HART
(model option -HT) and F
OUNDATION fieldbus (model option
-FF or -FI). Digital communications allow 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.
The seven-button membrane-type keypad allows local programming and calibrating of the transmitter. The HART
Model 375 communicator can also be used for programming and calibrating the transmitter.
The Model Xmt-A Transmitter with the appropriate sensor
measures dissolved oxygen (ppm and ppb level), free
chlorine, total chlorine, monochloramine, and ozone in
water and aqueous solutions. The transmitter is compatible with Rosemount Analytical 499A amperometric sensors for oxygen, chlorine, monochloramine, and ozone;
and with Hx438, Bx438, and Gx448 steam-sterilizable oxygen sensors.
For free chlorine measurements, both automatic and manual pH correction are available. pH correction is necessary
because amperometric free 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 Xmt-A eliminates the
need for messy and expensive sample conditioning by
measuring the 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, total chlorine, and monochloramine readings for
changes in membrane permeability caused by temperature changes.
For pH measurements — pH is available with free chlorine
only — the Xmt-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.
2
MODEL XMT-A-HT SECTION 1.0
DESCRIPTION AND SPECIFICATIONS
1.2 SPECIFICATIONS - GENERAL
Case: ABS (panel mount), polycarbonate (pipe/wall mount);
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: 10 lb/10 lb (4.5/5.0 kg)
Display: Two line, 16-character display. Character height:
4.8 mm; first line shows process variable (oxygen,
ozone, free chlorine, total 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 in the two-line
display.
Temperature resolution: 0.1°C (≤99.9°C);
1°C (≥100°C)
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 steriliz-
able 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
HART Communications: PV, SV, TV, and 4V assignable
to measurement (oxygen, ozone, or chlorine), temperature, pH, and sensor current.
RFI/EMI: EN-61326
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.
Analog Output: Two-wire, 4-20 mA output with superim-
posed HART digital signal. Fully scalable over the
operating range of the sensor.
Output accuracy: ±0.05 mA
3
MODEL XMT-A-HT SECTION 1.0
DESCRIPTION AND SPECIFICATIONS
HAZARDOUS LOCATION APPROVALS
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
4
MODEL XMT-A-HT SECTION 1.0
DESCRIPTION AND SPECIFICATIONS
1.3 SPECIFICATIONS — OXYGEN
Measurement Range: 0-20 ppm (mg/L),
or equivalent partial pressure or % saturation
(limited by sensor)
Units: ppm, ppb, % saturation, partial pressure (mmHg,
inHg, atm, mbar, bar, kPa)
Resolution: 4 digits. Position of decimal point depends
on units selected
for partial pressure (x.xxx to xxxx)
for % saturation (fixed at xxx.x%)
for ppm (fixed at xx.xx ppm)
for ppb (fixed at xxx.x ppb, changes to 1.00 ppm
when ppb reading exceeds 999.9 ppb)
Temperature correction for membrane permeability:
automatic between 0 and 50°C (can be disabled)
Calibration: air calibration (user must enter barometric
pressure) or calibration against a standard instrument
SENSORS — OXYGEN:
Model 499A DO-54, 499A DO-54-VP for ppm level
Model 499A TrDO-54, 499A TrDO-54-VP for ppb level
Hx438, Gx448, and Bx438 steam-sterilizable oxygen
sensors
1.4 SPECIFICATIONS — FREE CHLORINE
Measurement Range: 0-20 ppm (mg/L) as Cl
2
(limited by 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)
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, 499A CL-01-54-VP
SPECIFICATIONS — pH
Application: pH measurement available with free chlo-
rine 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.
See pH sensor product data sheet for complete ordering
information.
1.5 SPECIFICATIONS — TOTAL CHLORINE
Measurement Range: 0-20 ppm (mg/L) as Cl
2
(limited by 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 5 and 35°C (can be disabled)
Calibration: against grab sample analyzed using portable
test kit.
SENSOR — TOTAL CHLORINE:
Model 499A CL-02-54 (must be used with SCS 921)
1.6 SPECIFICATIONS — MONOCHLORAMINE
Measurement Range: 0-20 ppm (mg/L) as Cl
2
(limited by 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 5 and 35°C (can be disabled)
Calibration: against grab sample analyzed using portable
test kit.
SENSOR — MONOCHLORAMINE:
Model 499A CL-03-54, 499A CL-03-54-VP
1.7 SPECIFICATIONS — OZONE
Measurement Range: 0-10 ppm (mg/L) (limited by sensor)
Units: ppm and ppb
Resolution:
for ppm: x.xxx to xxxx
for ppb: xxx.x to xxxx
Temperature correction for membrane permeability:
automatic between 5 and 35°C (can be disabled)
Calibration: against grab sample analyzed using portable
test kit.
SENSOR — OZONE:
Model 499A OZ-54, 499A OZ-54-VP
5
MODEL XMT-A-HT SECTION 1.0
DESCRIPTION AND SPECIFICATIONS
1.8 TRANSMITTER DISPLAY DURING CALIBRATION AND PROGRAMMING
The display can be readily configured to meet user requirements.
Basic display for all measurements:
For the measurement of oxygen, a variety of units are available: ppm, ppb (for 499ATrDO sensor only), % saturation,
and partial pressure (in units of mm Hg, in Hg, bar, mbar, atm, or kPa).
For chlorine measurements with continuous pH correction, the basic display also shows the pH.
A display showing the raw sensor current can also be selected.
1.9 HART COMMUNICATION (Figure 1-1)
The Model 375 HART Communicator is a hand-held device that provides a common link to all HART SMART instruments and allows access to AMS (Asset Management Solutions). Use the HART communicator to set up and control the
Xmt-A-HT and to read measured variables. Press ON to display the on-line menu. All setup menus are available through
this menu.
FIGURE 1-1. HART Communication
1.234ppm
25.0°C 12.34mA
1.234ppm
7.89pH 25.0°C
1.234ppm
25.0°C 500nA
6
MODEL XMT-A-HT SECTION 1.0
DESCRIPTION AND SPECIFICATIONS
1.10 ORDERING INFORMATION
The Model Xmt-A-HT Transmitter is intended for the determination of oxygen (ppm and ppb level), free chlorine, total
chlorine, monochloramine, and ozone. For free chlorine measurements, which often require continuous pH correction, a
second input for a pH sensor is available.
ACCESSORIES
MODEL/PN DESCRIPTION
515 DC loop power supply (see product data sheet 71-515)
23820-00 2-in. pipe mounting kit
9240048-00 Stainless steel tag, specify marking
Model 375 To order HART Model 375 Communicator, call Emerson Process Management at (800) 999-9307
AMS software To order AMS software, call Emerson Process Management at (800) 999-9307
23554-00 Gland fittings PG 13.5, 5 per package
1.11 ACCESSORIES
POWER SUPPLY: Use the Model 515 Power Supply to
provide dc loop power to the transmitter. The Model 515
provides two isolated sources at 24Vdc and 200 mA each.
For more information refer to product data sheet 71-515.
ALARM MODULE: The Model 230A alarm Module
receives the 4-20 mA signal from the Xmt-A-HT transmitter and activates two alarm relays. High/high, low/low, and
high/low are available. Hysteresis (deadband) is also
adjustable. For more information, refer to product data
sheet 71-230A.
HART COMMUNICATOR: The Model 375 HART communicator allows the user to view measurement values as
well as to program and configure the transmitter. The
Model 375 attaches to any wiring terminal across the output loop. A minimum 250 Ω load must be between the
power supply and transmitter. Order the Model 375 communicator from Emerson Process Management. Call
(800) 999-9307.
CODE REQUIRED SELECTION
HT Analog 4-20 mA output with superimposed HART digital signal
FF Foundation fieldbus digital output
FI Foundation fieldbus digital output with FISCO
CODE REQUIRED SELECTION
10 Panel mounting enclosure
11 Pipe/Surface mounting enclosure (pipe mounting requires accessory kit PN 23820-00)
CODE AGENCY APPROVALS
60 No approval
67 FM approved intrinsically safe and non-incendive (when used with appropriate sensor and safety barrier)
69 CSA approved intrinsically safe and non-incendive (when used with appropriate sensor and safety barrier)
73 ATEX approved intrinsically safe (when used with appropriate sensor and safety barrier)
CODE REQUIRED SELECTION
P pH/ORP
MODEL
Xmt SMART TWO-WIRE MICROPROCESSOR TRANSMITTER
Xmt-P-HT-10-67 EXAMPLE
7
MODEL XMT-A-HT SECTION 2.0
INSTALLATION
SECTION 2.0
INSTALLATION
Type of Mounting Section
Panel 2.2.2
Pipe 2.2.3
Surface 2.2.4
2.1 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.
2.2 INSTALLATION
2.2.1 General Information
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, pipe, or surface mounting. Refer to the table below.
5. The transmitter case has two 1/2-inch (PG13.5) conduit openings and four 1/2-inch knockouts. One conduit
opening is for the power/output cable; the other opening is for the sensor cable. The center knockout in the
bottom of the enclosure should be removed only if a second sensor is required, i.e., if free chlorine with continuous pH correction is being measured. (Note: Earlier versions of the Xmt-A-HT pipe/surface mount transmitters may have three openings in the bottom of the enclosure. The transmitter is shipped with a NEMA 4X
plug installed in the center opening.)
Figure 2-1 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 connections, do not
remove the hinged front panel (-11 models) from the base during
wiring installation. Allow sufficient wire length to avoid stress on conductors.
FIGURE 2-1. Removing the Knockouts
8
MODEL XMT-A-HT SECTION 2.0
INSTALLATION
FIGURE 2-2. Panel Mount Installation
Access to the wiring terminals is through the rear cover. Four screws hold the cover in place.
2.2.2 Panel Mounting.
MILLIMETER
INCH
9
MODEL XMT-A-HT SECTION 2.0
INSTALLATION
FIGURE 2-3. Pipe Mount Installation
The front panel is hinged at the bottom. The panel swings down for access to the wiring terminals.
2.2.3 Pipe Mounting.
MILLIMETER
INCH
10
MODEL XMT-A-HT SECTION 2.0
INSTALLATION
FIGURE 2-4. Surface Mount Installation
The front panel is hinged at the bottom. The panel swings down for access to the wiring terminals.
2.2.4 Surface Mounting.
MILLIMETER
INCH
11
MODEL XMT-A-HT SECTION 2.0
INSTALLATION
2.3 POWER SUPPLY/CURRENT LOOP
2.3.1 Power Supply and Load Requirements.
Refer to Figure 2-5.
The supply voltage must be at least 12.0 Vdc at the transmitter terminals. The power supply must be able to cover the
voltage drop on the cable as well as the load resistor (250 Ω
minimum) required for HART communications. The maximum power supply voltage is 42.0 Vdc. For intrinsically
safe installations, the maximum power supply voltage is
30.0 Vdc. The graph shows load and power supply requirements. The upper line is the power supply voltage needed
to provide 12 Vdc at the transmitter terminals for a 22 mA
current. The lower line is the power supply voltage needed
to provide 30 Vdc for a 22 mA current.
The power supply must provide a surge current during the
first 80 milliseconds of startup. The maximum current is
about 24 mA.
For digital communications, the load must be at least 250 ohms. To supply the 12.0 Vdc lift off voltage at the transmitter,
the power supply voltage must be at least 17.5 Vdc.
FIGURE 2-5. Load/Power Supply Requirements
FIGURE 2-6. Power Supply/Current Loop Wiring
2.3.2 Power Supply-Current Loop
Wiring.
Refer to Figures 2-6, 2-7, and 2-8.
Run the power/signal wiring through
the opening nearest TB-2.
For optimum EMI/RFI protection . . .
1. Use shielded power/signal cable
and ground the shield at the
power supply.
2. Use a metal cable gland and be
sure the shield makes good electrical contact with the gland.
3. Use the metal backing plate (see
Figure 2-6) when attaching the
gland to transmitter enclosure.
The power/signal cable can also be
enclosed in an earth-grounded
metal conduit.
Do not run power supply/signal
wiring in the same conduit or cable
tray with AC power lines or with
relay actuated signal cables. Keep
power supply/signal wiring at least
6 ft (2 m) away from heavy electrical
equipment.
12
MODEL XMT-A-HT SECTION 2.0
INSTALLATION
FIGURE 2-7. Power and Sensor Wiring Terminals and Wiring Label for Xmt-A-HT Panel Mount Enclosure.
13
MODEL XMT-A-HT SECTION 2.0
INSTALLATION
FIGURE 2-8. Power and Sensor Wiring Terminals and Wiring Label for Xmt-A-HT Pipe/Surface Mount Enclosure.
14
MODEL XMT-A-HT SECTION 3.0
SENSOR WIRING
SECTION 3.0
SENSOR WIRING
3.1 WIRING MODEL 499A OXYGEN, CHLORINE, MONOCHLORAMINE, AND OZONE SENSORS
All 499A sensors (499ADO, 499ATrDO, 499ACL-01, 499ACL-02, 499ACL-03, and 499AOZ) have identical wiring.
Use the pigtail wire and wire nuts provided with the sensor when more than one wire must be attached to a single terminal.
FIGURE 33. Xmt-A-HT wall/pipe mount; 499A sen-
sors with standard cable
FIGURE 3-4. Xmt-A-HT wall/pipe mount; 499A sen-
sors with optimum EMI/RFI or Variopol cable
FIGURE 3-1. Xmt-A-HT panel mount; 499A sensors
with standard cable
FIGURE 3-2. Xmt-A-HT panel mount; 499A sensors
with optimum EMI/RFI or Variopol cable
15
MODEL XMT-A-HT SECTION 3.0
SENSOR WIRING
FIGURE 3-5. Xmt-A-HT panel mount; free chlorine
sensor with standard cable and 399-09-62 pH sensor.
FIGURE 3-6. Xmt-A-HT panel mount; free chlorine
sensor with standard cable and 399-VP-09 pH sensor.
Xmt-A-HT mounting Free chlorine sensor cable pH sensor Figure
Panel standard 399-09-62 3.5
standard 399-VP-09 3.6
standard 399-14 3.7
EMI/RFI or Variopol 399-09-62 3.8
EMI/RFI or Variopol 399-VP-09 3.9
EMI/RFI or Variopol 399-14 3.10
Wall/pipe standard 399-09-62 3.11
standard 399-VP-09 3.12
standard 399-14 3.13
EMI/RFI or Variopol 399-09-62 3.14
EMI/RFI or Variopol 399-VP-09 3.15
EMI/RFI or Variopol 399-14 3.16
3.2 WIRING MODEL 499ACL-01 (Free Chlorine) SENSORS AND pH SENSORS
If free chlorine is being measured and the pH of the liquid varies more than 0.2 pH unit, a continuous correction for pH
must be applied to the chlorine reading. Therefore, a pH sensor must be wired to the transmitter. This section gives wiring
diagrams for the pH sensors typically used.
When using the 499ACL-01 (free chlorine) sensor with a pH sensor, use the RTD in the pH sensor for measuring
temperature. DO NOT use the RTD in the chlorine sensor.
The pH sensor RTD is needed for temperature measurement during buffer calibration. During normal operation, the RTD
in the pH sensor provides the temperature measurement required for the free chlorine membrane permeability correction.
Refer to the table to select the appropriate wiring diagram. Most of the wiring diagrams require that two or more shield
wires be attached to a single terminal. Use the pigtail wire and wire nuts provided with the chlorine sensor to make the connection. Insulate and tape back unused wires.
16
MODEL XMT-A-HT SECTION 3.0
SENSOR WIRING
FIGURE 3-9. Xmt-A-HT panel mount; free chlorine
sensor with optimum EMI/RFI or Variopol and
399-VP-09- pH sensor.
FIGURE 3-10. Xmt-A-HT panel mount; free chlorine
sensor with optimum EMI/RFI or Variopol
399-14 pH sensor.
FIGURE 3-7. Xmt-A-HT panel mount; free chlorine
sensor with standard cable and 399-14 pH sensor.
FIGURE 3-8. Xmt-A-HT panel mount; free chlorine
sensor with optimum EMI/RFI or Variopol cable
and 399-09-62 pH sensor.
17
MODEL XMT-A-HT SECTION 3.0
SENSOR WIRING
FIGURE 3-13. Xmt-A-HT wall/pipe mount; free chlorine
sensor with standard cable and 399-14 pH sensor.
FIGURE 3-14. Xmt-A-HT wall/pipe mount; free
chlorine sensor with optimum EMI/RFI or Variopol
cable and 399-09-62 pH sensor.
FIGURE 3-11. Xmt-A-HT wall/pipe mount; free chlorine
sensor with standard cable and 399-09-62 pH sensor.
FIGURE 3-12. Xmt-A-HT wall/pipe mount; free chlorine
sensor with standard cable and 399-VP-09 pH sensor.
18
MODEL XMT-A-HT SECTION 3.0
SENSOR WIRING
FIGURE 3-15. Xmt-A-HT wall/pipe mount; free
chlorine sensor with optimum EMI/RFI or Variopol
and 399-VP-09- pH sensor.
FIGURE 3-16. Xmt-A-HT wall/pipe mount; free chlorine sen-
sor with optimum EMI/RFI or Variopol 399-14 pH sensor.
FIGURE 3-17. Xmt-A-HT panel mount with Hx438 or
Gx448 sensor.
FIGURE 3-18. Xmt-A-HT wall/pipe mount with Hx438
or Gx448 sensor.
FIGURE 3-19. Wiring Bx438 to Xmt-A-HT-10 FIGURE 3-20. Wiring Bx438 to Xmt-A-HT-11
3.3 WIRING MODEL Hx438, Gx448, AND Bx438 SENSORS
19
MODEL XMT-A-HT SECTION 4.0
INTRINSICALLY SAFE OPERATION
FIGURE 4-1. FM Intrinsically Safe Installation Label
SECTION 4.0
INTRINSICALLY SAFE OPERATION
20
MODEL XMT-A-HT SECTION 4.0
INTRINSICALLY SAFE OPERATION
FIGURE 4-2. FM Intrinsically Safe Installation Wiring (1 of 2)
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