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Rosemount
™
928
Wireless Gas Monitor
Reference Manual
00809-0100-4928, Rev AF
December 2019
Safety information
Read this manual before working with this product. For personal and system safety and for optimum product performance, make sure to thoroughly understand the contents before installing, using, or maintaining this product.
The United States has two toll-free assistance numbers and one international number.
Customer Central: 1 800 999 9307 (7:00 a.m. to 7:00 p.m. Central Time)
National Reponse Center: 1 800 654 7768 (24 hours a day) for equipment service needs
International: 1 952 906 8888
NOTICE
Read this document before working with the product. For personal and system safety, and for optimum product performance, make sure you thoroughly understand the contents before installing, using, or maintaining this product. For technical assistance, contacts are listed below:
Customer Central
Technical support, quoting, and order-related questions.
United States - 1-800-999-9307 (7:00 am to 7:00 pm Central Time)
Asia Pacific- 65 777 8211
Europe/Middle East/Africa - 49 (8153) 9390
North American Response Center
Equipment service needs.
1-800-654-7768 (24 hours—includes Canada)
Outside of these areas, contact your local Emerson representative.
WARNING
Explosions
Explosions could result in death or serious injury.
Installation of device in an explosive environment must be in accordance with appropriate local, national, and international standards, codes, and practices.
Review Product certifications for any restrictions associated with a safe installation.
Before connecting a handheld communication device in an explosive atmosphere, ensure the instruments are installed in accordance with Intrinsically Safe or non-incendive field wiring practices.
When connecting an external device to the Rosemount 928's discrete output in a hazardous area, ensure that the external device is installed in accordance with Intrinsically Safe or non-incendive field wiring practices.
WARNING
Electrical shock
Electrical shock could cause death or serious injury.
Avoid contact with the leads and terminals. High voltage that may be present on leads can cause electrical shock.
WARNING
Physical access
Unauthorized personnel may potentially cause significant damage to and/or misconfiguration of end users’ equipment. This could be intentional or unintentional and needs to be protected against.
Physical security is an important part of any security program and fundamental to protecting your system. Restrict physical access by unauthorized personnel to protect end users’ assets. This is true for all systems used within the facility.
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CAUTION
Nuclear applications
The products described in this document are not designed for nuclear qualified applications. Using non-nuclear qualified products in applications that require nuclear-qualified hardware or products may cause inaccurate readings.
For information on Rosemount nuclear-qualified products, contact an Emerson sales representative.
CAUTION
Installation problems
Only install the Rosemount 928 and all other wireless devices after the Wireless Gateway has been installed and is functioning properly. Power up wireless devices in order of proximity from the Wireless Gateway, beginning with the closest. This will result in a simpler and faster network installation.
CAUTION
Shipping considerations for wireless products
Battery hazards remain when cells are discharged.
The unit was shipped to you without the power module installed. Remove the power module prior to shipping.
Each power module contains two "C" size primary lithium batteries. Primary lithium batteries are regulated in transportation by the US Department of Transportation and are also covered by IATA (International Air Transport Association), ICAO
(International Civil Aviation Organization), and ARD (European Ground Transportation of Dangerous Goods). It is the shipper's responsibility to ensure compliance with these or any other local requirements. Consult current regulations and requirements before shipping.
The power module with the wireless unit contains two "C" size primary lithium/thionyl chloride batteries. Each battery contains approximately 2.5 grams of lithium, for a total of 5 grams in each pack. Under normal conditions, the battery materials are self-contained and are not reactive as long as the batteries and the pack integrity are maintained. Take care to prevent thermal, electrical, or mechanical damage. Protect contacts to prevent premature discharge.
Power modules should be stored in a clean and dry area. For maximum battery life, storage temperature should not exceed 86
°F (30 °C).
The power module has surface resisitivity greater than one gigaohm and must be properly installed in the wireless device enclosure. Take care during transportation to and from the point of installation to prevent electrostatic charge buildup.
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Contents
December 2019
Contents
Rosemount 928 v
Contents
December 2019
Reference Manual
00809-0100-4928
vi Emerson.com/Rosemount
Reference Manual
00809-0100-4928
Contents
December 2019
Rosemount 928 vii
Contents
December 2019
Reference Manual
00809-0100-4928 viii Emerson.com/Rosemount
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Introduction
December 2019
1
1.1
1.2
Rosemount 928
Introduction
Using this manual
The sections in this manual provide information on installing, operating, and maintaining the Rosemount 928 Wireless Gas Monitor. Models 928XSS00 and 928XUT00 are the standard wireless gas monitors. Models 928XXSS01 and 928XUT01 include discrete outputs, which can be used to trigger optional external device alarms, such as beacons or annunciators, when an alarm condition occurs.
The manual sections are organized as follows.
contains information on the configuration and calibration of the transmitter. You can configure with the AMS Wireless Configurator or Field
Communicator. This section also includes Field Communicator menu trees.
contains information on the installation of the transmitter, installation of the sensor on the transmitter, and the wiring of external devices to the transmitter discrete output.
contains information for the commissioning of the transmitter onto the wireless network and how to verify that the transmitter has successfully joined.
provides detailed information on operation of the transmitter. The chapter shows LCD display messages and includes maintenance information, such as power module replacement, bump testing, and periodic calibration.
Troubleshooting provides descriptions and recommended corrective actions for common
errors and problems.
Specifications and reference data contains functional, physical, and performance
specifications, as well as ordering information.
Product certifications contains telecommunication compliance information, ordinary
location certification, hazardous locations certificates, and intrinsic safety installation drawings.
High gain remote antenna option
contains specifications, description, and installation information for the optional high gain remote antenna.
contains information about alerts in the HART ® command, 48 additional status field and device variables, and variable mapping indexes for the transmitter. This information can be used by DeltaV
Wireless Gateway for additional status mapping in Modbus communications protocols.
™ for alert monitoring and in the
® , OPC, or other
Models covered
This manual covers the following modules:
• Rosemount 928XSS00 Wireless Gas Monitor
— Ships with a separately specified Rosemount 628 Universal Gas Sensor.
• Rosemount 928UTX00 Wireless Gas Monitor
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Introduction
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1.4
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— Ships without a Rosemount 628 Universal Gas Sensor.
• Rosemount 928XSS01 Wireless Gas Monitor
— Wireless gas monitor with discrete output to be used as a switch for triggering external equipment on an alarm state.
— Ships with a separately specified Rosemount 628 Universal Gas Sensor.
• Rosemount 928UTX021
— Wireless gas monitor with discrete output to be used as a switch for triggering external equipment on an alarm state.
— Ships without a Rosemount 628 Universal Gas Sensor.
Device overview
The Rosemount 928 Wireless Gas Monitor uses the Rosemount 628 Universal Gas Sensor to monitor the presence of toxic gases. The Rosemount 628 Universal Gas Sensor consists of an electrochemical sensor inside a hot-swappable sensor module installed into the transmitter housing. The transmitter sends the gas concentrations measured by the sensor to the host system using the Wireless HART ® protocol.
Electrochemical toxic sensors, such as those contained in the Rosemount 628 Series Gas
Sensor Module, consist of a set of electrodes separated by electrolyte material. When the target gas is present inside the sensor housing, it oxidizes or reduces on the sensing electrode. This creates an electric signal across the cell, which the transmitter interprets and converts into a wireless-enabled signal.
Product recycling/disposal
Consider recycling equipment and packaging. Dispose of the product and packaging in accordance with local and national legislations and regulations.
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2.1
2.2
Configuration
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Configuration
Overview
This section contains information on configuring the transmitter, including the sensor, using Field Communicator or AMS Wireless Configurator. It also includes sensor calibration information.
Safety messages
Instructions and procedures in this section may require special precautions to ensure the safety of the personnel performing them.
WARNING
Follow installation guidelines.
Failure to follow these installation guidelines could result in death or serious injury.
Ensure that only qualified persons perform the installation.
WARNING
Explosions
Explosions could result in death or serious injury.
Before connecting a handheld communication device in an explosive atmosphere, make sure that the instruments are installed in accordance with Intrinsically Safe or non-incendive field wiring practices.
Verify that the operating atmosphere of the transmitter is consistent with the appropriate hazardous locations certifications.
WARNING
Electrical shock
Electrical shock could cause death or serious injury.
Use extreme caution when making contact with the leads and terminals.
The power module may be replaced in a hazardous area. The power module has a surface resistivity greater than one gigaohm and must be properly installed in the wireless device enclosure. Take care during transportation to and from the point of installation to prevent electrostatic charge buildup.
The surface resistivity of the antenna is greater than one gigaohm. To avoid electrostatic charge buildup, do not rub or clean the antenna with solvents or a dry cloth.
Substitution of components may impair intrinsic safety.
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Install the sensor
The Rosemount 928 Wireless Gas Monitor is compatible with the Rosemount 628
Universal Gas Sensors. These sensors are contained within a sensor module that fits integrally into the transmitter housing without using tools. Make electrical connections when the sensor module is fully seated in the transmitter sensor module housing.
CAUTION
Install the Ingress Protection (IP) filter.
If the IP filter is not installed, damage may occur to the sensor inside the sensor.
Do not operate the transmitter without the correct IP filter installed in the sensor.
When installing the IP filter, verify that the IP filter gasket is in place and properly
aligned and that it does not block the white filter media. Refer to Figure 2-1
.
When handling the IP filter, avoid contact with the filter media.
Verify that all three legs are fully latched by pushing upward on each leg of the IP filter.
Avoid getting water inside the IP filter.
Do not attempt to clean the IP filter.
Do not rinse or spray the IP filter with water.
Do not immerse the IP filter in water.
Figure 2-1: IP Filter
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A. IP filter housing
B. IP filter gasket
C. Filter media
Note
Use Rosemount 628 Universal Gas Sensors only with the Rosemount 928 Transmitter.
The sensor is held in place using a tight-fitting seal and snap connections. The sensor is connected to the transmitter by two latching tabs that fit into the bottom portion of the housing as shown in
.
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Figure 2-2: IP Filter Latching Tabs Locations
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Rosemount 928
A. Transmitter housing
B. Gas sensor module
C. Latching tabs
The seal between the transmitter housing and the sensor assembly is designed so that a snug, airtight fit is achieved between the two assemblies when properly installed.
Procedure
1. Remove the sensor from its packaging.
2. If installing a sensor on the transmitter for the first time, remove the protective plastic cap from the sensor module housing.
3. The sensor contains a keying feature that ensures that the module cannot be forced into the transmitter housing incorrectly. Confirm that the keying feature is aligned by rotating it into position before installing the sensor into the transmitter.
4. Slide the sensor assembly up into the main transmitter housing until it is completely seated.
5. To ensure a firm latch and seal, push the sensor upward until the two latching tabs are fully engaged. Push up on the bottoms of the tabs after they are seated.
6. Allow the transmitter to warm up before continuing.
for maximum warm-up times based on gas type. During the warm-up period, the displayed values, alerts, and gas concentrations do not reflect actual measurements; readings are not transmitted.
Table 2-1: Maximum Warm-up Periods
Gas type
Hydrogen sulfide (H
2
S)
Maximum warm-up period
One minute
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Table 2-1: Maximum Warm-up Periods (continued)
Gas type
Oxygen (O
2
)
Carbon monoxide (CO)
Maximum warm-up period
Seven minutes
One minute
Postrequisites
To remove the sensor, compress the two latching tabs and pull downward until the module is released from the transmitter housing.
Install the power module
The transmitter is powered by the Emerson 701 SmartPower ™ the module to the transmitter, do the following:
Module - Black. To connect
Procedure
1. Remove the rear housing cover.
A. Rear housing cover
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2. Connect the Emerson 701 SmartPower Module - Black.
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2.5.1
3. Verify the connection by viewing the LCD display.
4. Replace the rear housing cover and completely tighten.
5. Allow the transmitter to warm up before continuing.
for maximum warm-up times based on gas type. During the warm-up period, the displayed values, alerts, and gas concentrations do not reflect actual measurements; readings are not transmitted.
Table 2-2: Maximum Warm-up Periods
Gas type
Hydrogen sulfide (H
2
S)
Oxygen (O
2
)
Carbon monoxide (CO)
Maximum warm-up period
One minute
Seven minutes
One minute
Bench configuration
To configure, you must install the sensor in a functional transmitter. The transmitter receives any HART ® communication from a handheld Field Communicator or from an AMS
Wireless Configurator.
Remove the rear housing cover to expose the terminal block and HART communication terminals; then connect the power module to power the device for configuration.
Bench configure using a Field Communicator
A transmitter Device Description (DD) is required for HART ® communication.
To connect to the transmitter using a handheld communication device, refer to Guided setup
. To obtain the latest DD, go to EmersonProcess.com/DeviceFiles and then visit the
Emerson web page for your handheld device.
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2.5.2
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Procedure
1. On the Home screen, select Configure.
2. Do one of the following:
• On the Configure screen, select Guided Setup to verify or change initial
configuration settings. Refer to Guided setup
. Refer to the Field Communicator subsections for each configuration task.
• On the Configure screen, select Manual Setup to verify or change all configuration settings, including optional advanced settings. Refer to
Manual setup . Refer to the Field Communicator subsections for each configuration task.
3. When finished, select Send to implement configuration changes.
4. When configuration is completed, remove the HART communications leads from the COMM terminals on the terminal block and replace the rear housing cover.
Bench configure AMS Wireless Configurator
AMS Wireless Configurator is capable of connecting to devices directly, using a HART ® modem, or though a Wireless Gateway.
Procedure
1. In the AMS Device Manager pane, select the HART modem.
2. In the device pane, double-click the device icon.
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3. Select Configure .
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4. In the Configure pane, do one of the following:
• Select Guided Setup to verify or change initial configuration settings. Refer to
Guided setup . Refer to the AMS Wireless Configurator subsections for each
configuration task.
• Select Manual Setup to verify or change all configuration settings, including optional advanced settings. Refer to
Manual setup . Refer to the AMS Wireless
Configurator subsections for each configuration task.
5. When finished, select Send to implement configuration changes.
HART
®
menu trees
show the navigation paths for Field Communicator commands and options.
A Rosemount 928 Wireless Gas Monitor DD is required for HART Wireless transmitter communication. To obtain the latest Emerson DD, visit the System Software and Device
Description web page for your handheld communicator device. Refer to the reference manual for your handheld communicator device.
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Figure 2-3: Field Communicator Overview Menu Tree
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Figure 2-4: Field Communicator Configure Menu Tree
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Figure 2-5: Field Communicator Service Tools Menu Tree
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2.7
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Guided setup
Guided setup contains basic configurations settings. The Guided Setup menus are useful during initial configuration.
Note
Emerson developed the Field Communicator Guided Setup configuration procedures using Emerson AMS Trex ™ Device Communicator. The menus are identical to those found in other Field Communicators, but are navigated using touch screens rather than fast keys.
Refer to the manual for your handheld communicator device for more information.
WARNING
Explosions
Do not connect to the COMM terminals when an explosive atmosphere is present.
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Procedure
1. Connect the HART communicator.
® communication leads to the HART terminals on the handheld
2. Connect the HART communication leads to the COMM terminals on the transmitter terminal block.
3. Start your handheld communicator device. If necessary, open the HART Field
Communicator application on your handheld device to establish HART communication.
Refer to the manual for your handheld communicator device for more information.
4. On the Overview screen, select Configure .
5. On the Configure screen, select Guided Setup .
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Postrequisites
Refer to
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2.7.1
Basic setup
Basic setup using Field Communicator
Procedure
1. On the Guided Setup screen, select Basic Setup .
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2. On the Device Information screen, select any of the following and configure as
needed. Otherwise, continue with Step 3 .
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• Long tag: Enter an identifier for the device up to 32 characters long using the virtual keypad. The Long tag field is blank by default and does not display if left blank.
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• Tag: Enter an identifier for the device up to eight uppercase alphabetic and numeric characters long using the virtual keypad. The Tag field is blank by default and does not display if left blank.
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• Descriptor: Enter a description of the device up to 16 alphabetic, numeric, and special characters long. The Descriptor field is blank by default and does not display if left blank.
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• Message: Enter a message up to 32 alphabetic, numeric, and special characters long. The Message field is blank by default, does not display if left blank, and may be used for any purpose.
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3. On the Device Information screen, select Next .
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4. On the Basic Setup screen, select OK to confirm successful completion of basic setup.
Basic setup using AMS Wireless Configurator
Procedure
1. On the Guided Setup tab, in the Initial Setup field, select Basic Setup .
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2. On the Device Information tab, configure any of the following as needed. Otherwise,
Rosemount 928
• Long tag: Enter an identifier for the device up to 32 characters long using the virtual keypad. The Long tag field is left blank by default and does not display if left blank.
• Tag: Enter an identifier for the device up to eight uppercase alphabetic and numeric characters long using the virtual keypad. The Tag field is blank by default and does not display if left blank.
• Descriptor: Enter a descriptor of the device up to 16 alphabetic, numeric, and special characters long. The Descriptor field is blank by default and does not display if left blank.
• Message: Enter a message up to 32 alphabetic, numeric, and special characters long. The Message field is left blank by default, does not display if left blank, and may be used for any purpose.
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3. On the Basic Setup screen, select Next .
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2.7.2
4. Select Finish .
Joining the transmitter to a wireless network
To communicate with the Wireless Gateway and the host system, you must use the wireless network to configure the transmitter.
This procedure is the wireless equivalent of connecting wires from a transmitter to the host system. Using Field Communicator or AMS Wireless Configurator, enter the network
ID and join key so that they match the network ID and join key of the Wireless Gateway and other devices in the network. If the network ID and join key are not identical, the transmitter will not communicate with the network. You can obtain the network ID and join key from the Wireless Gateway on the Setup → Network → Settings page on the web server.
Note
The amount of time required to join the new device or devices to the network is dependent on the number of devices being joined and the number of devices in the current network. One new device joining an existing network with multiple devices may take up to five minutes. Multiple new devices joining an existing network may take up to
60 minutes.
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Join a wireless network using Field Communicator
Procedure
1. On the Guided Setup screen, select Join to Network .
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2. On the Join to Network screen, use the numeric keypad to enter the Wireless HART ® network ID.
The network ID must match the Wireless Gateway network ID. Refer to the System
Settings → Network → Network Settings page in the Wireless Gateway web-based user interface for the network ID.
3. Select OK .
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4. On the Join Key screen, use the hexadecimal keypad to enter the first part of the join key.
Refer to the System Settings → Network → Network Settings page in the Wireless
Gateway web-based user interface for the join key.
5. Select OK .
6. Repeat
Step 4 and Step 5 for parts 2 - 4 of the join key.
Join a wireless network using AMS Wireless Configurator
Procedure
1. On the Guided Setup tab, in the Wireless field, select Join Device to Network .
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2. On the Join Device to Network tab, enter the network ID and join key.
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2.7.3
3. Select Next .
4. Follow the steps in the wizard to complete the network configuration.
Update rate considerations
Before configuring the wireless update rate for your wireless devices, evaluate the safety concerns, conditions, and wireless network in your facility to select the current update rate to meet your needs.
When specifying the update rate, consider the potential for toxic gas release, the severity of potential gas concentration that may be released, and whether the device is located in a populated area. The default update rate is eight seconds and is appropriate for most applications. You may use a more frequent update rate if desired. A less frequent update rate extends transmitter power module life and optimizes Wireless Gateway device capacity.
Consider the speed with which you want to be alerted to a dangerous condition of toxic gas. Emerson does not recommend reporting by exception for the Rosemount 928
Wireless Gas Monitors or Emerson Wireless Gateways due to its potential adverse effect on
Wireless Gateway capacity and network integrity. Therefore, select an update rate for all wireless gas monitors that corresponds to the safety needs of your facility but does not exceed the capacity of the Wireless Gateway or your wireless network.
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Note
The configured wireless update rate does not affect the LCD display and the optional alarm output (if installed) update rates.
Configuring the update rate
The Rosemount 928 takes measurements every two seconds. The update rate is the frequency at which new measurements and device statuses are transmitted over the wireless network. You may change the update rate during configuration. The update rate range is one second to sixty minutes. The default update rate is eight seconds. Less frequent update rates help extend power module life and optimize Wireless Gateway capacity.
Configure the update rate using Field Communicator
Procedure
1. On the Guided Setup screen, select Configure Update Rate .
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2. On the Configure Update Rate screen, do one of the following:
• a. For an update rate from 1 to 60 seconds, select an update rate from the list.
b. Select OK .
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• a. For update rates greater than 60 seconds, select 61-3600 seconds from the list.
b. Enter the update rate in number of seconds. For example, enter 1800 seconds for 30 minutes.
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00809-0100-4928 c. Select OK .
3. On the Emerson Wireless Gateway Optimizations screen, select Yes - Enable
Optimizations to save and use wireless optimizations or select No - Disable
Optimizations to reject wireless optimizations.
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Note
Wireless gateway optimizations combine process measurement and device diagnostic messages from field devices to the wireless gateway, saving network bandwidth. If you don't use optimizations, you will need more message packets to receive the same amount of information. Emerson recommends enabling wireless gateway optimizations unless they are incompatible with the wireless gateway.
4. Select OK .
5. On the Configure Update Rate screen, select OK to confirm successful update rate configuration.
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Configure the update rate using AMS Wireless Configurator
Procedure
1. On the Guided Setup tab, in the Wireless field, select Configure Update Rate to configure the frequency at which the device reports measurement and diagnostic information.
2. On the Configure Update Rate screen, do one of the following:
• a. Select an update rate from 1 to 60 seconds from the list.
b. Select Next .
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• a. Select 61-3600 from the list.
36 b. Type the number of seconds for an update rate from 61 seconds to 60 minutes. For example, enter 1800 seconds for 30 minutes.
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Rosemount 928 c. Select Next .
3. On the Wireless Gateway Optimization screen, select Yes - Enable Optimizations to save and use wireless optimizations or select No - Disable Optimizations to reject wireless optimizations.
Note
Wireless gateway optimizations combine process measurement and device diagnostic messages from field devices to the wireless gateway, saving network bandwidth. If you don't use optimizations, you will need more message packets to receive the same amount of information. Emerson recommends enabling wireless gateway optimizations unless they are incompatible with the wireless gateway.
4. Select Next .
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5. Select Next and then select Finish to save the update rate configuration.
Configuring the device display mode
The device display mode defines whether or how frequently the LCD display is turned on to display selected dynamic variables screens. Disabling the display mode or selecting a less frequent display mode extends power module life.
Configure the device display mode using Field
Communicator
Procedure
1. On the Guided Setup screen, select Configure Device Display .
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2. On the Device Display Options screen, select one of the following display mode options.
• Disabled: The display is turned off. This is useful if the display will never be viewed locally.
• On Demand: The display is on when the gas monitor is connected to a handheld communication device or when it receives a signal from its wireless gateway.
• Periodic: The display is on only during updates at the configured update rate.
• High Availability: The display is always on regardless of the configured update rate. This is the default display mode option.
3. Select OK to save the selected device display options.
Note
When a handheld communication device is connected to the transmitter, the LCD display is in High Availability mode. Selecting and accepting the On Demand or Periodic options does not take effect until approximately five minutes after the handheld communicator device is disconnected. Selecting and displaying Disabled takes effect immediately.
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Configure the device display mode using AMS Wireless
Configurator
Procedure
1. On the Guided Setup tab, in the Optional Setup field, select Configure Device
Display .
2.7.6
40
2. Select one of the following display mode options:
• Disabled: The display is turned off. This is useful if the display will never be viewed locally.
• On Demand: The display is on when the gas monitor is connected to a handheld communication device or when it receives a signal from its wireless gateway.
• Periodic: The display is on only during updates at the configured update rate.
• High Availability: The display is always on regardless of the configured update rate. This is the default display mode option.
3. Follow the steps in the wizard to configure the device display mode.
Configuring process alerts
Process alerts allow you to configure the device to send a HART ® message when the configured data point is exceeded. Alerts remain active if the set points are exceeded and the alert mode is ON. Process alerts are displayed on a handheld communication device, on the AMS Device Manager status screen, on the Wireless Gateway web interface, on host systems with which the Wireless Gateway communicates, and in the error section of the
LCD display (if so configured). Disable process alerts if the Rosemount 928 is not connected to a wireless network.
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The gas concentration may be latched. If you select Latch Concentration Alarms, the alarm output is latched until the alert is manually cleared.
You can reset a latched gas concentration alarm by using Field Communicator or AMS
Wireless Configurator. Refer to
Resetting latched alarms for information about clearing
latched local alarms. If you select Not Latched, the gas concentration alarm clears automatically when the gas concentration level dissipates below the specified High
Concentration Threshold.
You can also clear latched alarms by resetting the alarm by removing and reinstalling the power module. Refer to
and
. Latched alarms do not remain latched following a device reset or power module failure.
Clearing alert history clears process alert history for other alerts, but does not clear latched gas concentration alerts. Refer to
Clearing process alarm history . You may query alert
history for other process alerts to determine whether they have been active.
Configure process alerts using Field Communicator
Procedure
1. On the Guided Setup screen, select Configure Process Alerts .
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2. On the Process Alerts screen, select a process alert to configure.
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3. On the selected process alert screen, select Mode .
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4. On the Mode screen, select Enabled .
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5. Select OK .
6. On the selected process alert screen, select Alert Limit .
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7. On the Alert Limit screen, use the numeric keypad to enter an alert limit for the selected process alert based on your needs and local regulations.
8. Select OK .
9. On the selected process alert screen, select Next .
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10. On the Configure Process Alerts screen, select OK to confirm successful process alert configurations.
11. Repeat
as necessary to configure additional process alerts.
12. When you have completed configuration, remove the HART ® communication leads from the Comm terminals on the terminal block and replace the rear housing cover.
Configure process alerts using AMS Wireless Configurator
Procedure
1. On the Guided Setup tab, in the Optional Setup field, select Configure Process
Alerts .
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The Process Alerts window is displayed.
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2. In the Mode list, in the HI-HI Alarm field, select Enabled to enable the alarm.
3. In the Alert Limit field, enter an alert limit for the selected process alert based on your needs and local regulations.
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4. Repeat
Step 2 and Step 3 if necessary to configure the Hi Alarm process alert.
5. Select Next .
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6. Select Next to confirm successful process alert configuration.
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2.8
Rosemount 928
7. Select Finish .
Calibrating the sensor
Calibrating the sensor ensures that the analog, digital, and discrete outputs accurately transmit the target gas concentrations registered by the module. Although Emerson calibrated the device at the factory, you must calibrate it at the following times to ensure accuracy and correct operation:
• During installation.
• At least every 180 days throughout the device's service life.
• When replacing the sensor.
The Rosemount 628 Universal Gas Sensor is a smart sensor. As such, it retains its own calibration information. It must be connected to a transmitter to calibrate, but the calibration settings are stored in the sensor itself rather than in the transmitter. You may uninstall the sensor from a transmitter and reinstall it in another transmitter without affecting its calibration.
CAUTION
If you are calibrating in a windy environment (over five mph), use a calibration cup to ensure calibration accuracy.
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Note
You do not need a conventional calibration cup to calibrate the sensor. Connect calibration tubing (PVC tubing, 3/16-in. ID, 5/16-in. OD) directly to the fitting on the IP filter assembly (part number 00628-9000-0001).
Calibrate using Field Communicator
Note
Emerson developed the Field Communicator guided setup configuration procedures in this manual using Emerson AMS Trex Device Communicator. The menus are identical to those found in other Field Communicators, but you navigate using touch screens rather than fast keys. Refer to the manual for your handheld communication device for more information.
WARNING
Explosions
Do not connect to the COMM terminals when an explosive atmosphere is present.
Procedure
1. Connect the HART ® communication leads from the Field Communicator HART terminals to the COMM terminals on the terminal block of the transmitter.
A B
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A. +COMM terminal
B. -COMM terminal
2. Establish communication between the transmitter and the Field Communicator.
3. On the Home screen, select Configure .
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4. On the Configure screen, select Guided Setup .
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5. On the Guided Setup screen, select Calibrate Sensor .
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6. Select OK to accept the current date as the calibration date and continue.
7. Acknowledge the warning. If necessary, remove the loop from automatic control.
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Note
Calibration of an O
2
sensor is unlikely to use a true zero value for its lower limit; one must calibrate the sensor to a known lower percent oxygen value (such as 15 percent oxygen level by volume) in order to "zero" the sensor as outlined in the remainder of the calibration steps below.
8. When calibrating for H
2
When calibrating for O
2
S and CO, expose the sensor to clean air to zero the reading.
, expose the sensor to a known percent of oxygen content calibration gas (recommended 15 percent oxygen by volume) to be used as the
"zero" calibration value. If the ambient air may contain trace amounts of target gas or other gases (for example, carbon monoxide from engine exhaust) that may interfere with zeroing the device, do the following: a) Obtain a cylinder of verified clean air (H
2
S and CO) or a cylinder of verified percent oxygen content calibration gas (O
2
) and a length of calibration tubing (PVC tubing, 3/16-in. ID, 5/16-in. OD).
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c) Attach a length of calibration tubing (PVC tubing, 3/16-in. ID, 5/16-in. OD) from the regulator on the cylinder to the fitting on the IP filter assembly (part number 00628-9000-0001).
Rosemount 928 d) Release the clean air/known percent oxygen specified calibration gas to the sensor.
Note
If you need a long length of calibration tubing to reach the device, make allowances for a delay in response time from the sensor while the clean air travels the length of the calibration tubing.
e) Complete
through
.
f) Turn off the clean air (or percent oxygen specified calibration gas) when the sensor is correctly zeroed.
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9. Select OK when the zero measurement reading stabilizes.
Note
Negative measurement readings may occur and are normal during zeroing.
10. Wait while the Field Communicator performs zero adjustment.
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11. Select OK to accept the new zero.
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12. On the Calibrate Sensor screen, enter a gas concentration level that corresponds to the concentration of calibration gas that will be applied during calibration.
For oxygen, use 20.9 percent oxygen from clean air. This step may be performed with surrounding air if no contaminants are present.
13. Select OK .
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14. Install a regulator on the target gas source.
WARNING
Toxic gas
Before performing the next step, verify that the regulator is closed to avoid releasing target gas into the air during calibration.
15. Attach a length of calibration tubing (PVC tubing, 3/16-in. ID, 5/16-in. OD) from the regulator on the target gas source to the fitting on the IP filter assembly (part number 00628-9000-0001).
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16. Release the target gas from the target gas source.
Emerson recommends a flow rate of 1.0 liters per minute to ensure a consistent sensor reading.
Note
If you need a long length of tubing to reach the device, make allowances for a delay in response time from the sensor while the target gas travels the length of the calibration tubing.
A gas concentration should begin to register on the LCD display and gradually increase to the calibration gas concentration level. The gas concentration level shown on the device display may not exactly match that shown on the label of the target gas source.
17. Wait while the gas concentration measurement stabilizes.
.
Figure 2-6: Typical Calibration Profile
Rosemount 928
A. Gas concentration ppm
B. Time (in seconds)
C. Gas concentration measurement has stabilized
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18. Select OK when the gas concentration measurement stabilizes at or near the target gas concentration level.
19. Wait while the Field Communicator calibrates.
When the calibration process finishes, the Field Communicator displays the new adjusted reading.
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20. Select OK .
Note
If you can't calibrate the sensor, verify that the correct sensor is installed, the correct target gas is being applied, and the IP filter is not clogged or obstructed. A sensor that cannot accept a new calibration may have reached the end of its service
life. Replace the sensor and repeat this procedure. Refer to Replace the gas sensor .
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21. Select Accept calibration and then select OK .
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The Field Communicator displays the Service Reminder screen if a service reminder is configured and enabled.
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22. Select OK to accept the service reminder date or enter another date.
for more information.
23. Shut off the target gas flow at the regulator.
24. Detach the calibration tubing from the regulator on the target gas source and from the IP filter inlet on the bottom of the sensor.
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Calibrate using AMS Wireless Configurator
Procedure
1. On the Guided Setup tab, in the Initial Setup field, select Calibrate Sensor .
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2. On the Calibrate Sensor screen, select Next to accept the current date as the calibration date and continue.
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3. On the Warning screen, select Next .
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4. When calibrating for H
2
S, and CO, expose the sensor to clean air to zero the reading. When calibrating for O
2
, expose the sensor to a known percent oxygen content calibration gas (recommended 15 percent oxygen by volume) to be used as the "zero" calibration value. If the ambient air may contain trace amounts of target gas or other gases (for example, carbon monoxide from engine exhaust) that may interfere with zeroing the device, do the following: a) Obtain a cylinder of verified clean air (H
2
S and CO) or a cylinder of verified percent oxygen content calibration gas (O
2
) and a length of calibration tubing (PVC tubing, 3/16-in. ID, 5/16-in. OD).
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c) Attach a length of calibration tubing (PVC tubing, 3/16-in. OD, 5/16-in. OD) from the regulator on the cylinder to the IP filter on the bottom of the sensor.
Rosemount 928 d) Release the clean air/known percent oxygen specified calibration gas to the sensor.
Note
If you need a long length of calibration tubing to reach the device, make allowances for a delay in response time from the sensor while the clean air travels the length of the calibration tubing.
through
.
f) Turn off the clean air/known percent oxygen specified calibration gas when the sensor is correctly zeroed.
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5. Select Next when the zero measurement reading stabilizes.
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6. Select Next .
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7. Select Accept New Zero .
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8. Select Next .
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9. On the Calibrate Sensor screen, enter a gas concentration level.
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10. Select Next .
WARNING
Toxic gas
The regulator may release gas into the air during calibration.
Before starting the next step, verify that the regulator is closed.
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11. Install a regulator on the target gas source.
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12. Attach a length of calibration tubing (PVC tubing, 3/16-in. ID, 5/16-in. OD) from the regulator on the target gas source to the IP filter inlet on the bottom of the sensor.
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13. Release the target gas from the target gas source.
Emerson recommends a flow rate of 1.0 liters per minute to ensure a consistent sensor reading.
Note
If you need a long length of calibration tubing to reach the device, make allowances for a delay in response time from the sensor while the target gas travels the length of the calibration tubing.
A gas concentration should begin to register on the device display and gradually increase to the calibration gas concentration level. The gas concentration level shown on the device display may not exactly match that shown on the label attached to the target gas source.
14. Wait while the gas concentration measurement stabilizes.
.
Figure 2-7: Typical Calibration Profile
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A. Gas concentration ppm
B. Time (in seconds)
C. Gas concentration measurement has stabilized
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15. Select Next when the gas concentration measurement stabilizes at or near the target gas concentration level.
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16. Wait while the AMS Wireless Configurator calibrates.
When the calibration process finishes, the new adjusted reading is displayed.
17. Select Next .
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18. Select Accept calibration .
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19. Select Next .
The Service Reminder screen is displayed if a service reminder is configured and enabled.
2.9
20. Select Next to accept the service reminder date or enter another date.
for more information.
21. When the gas concentration reading stabilizes at or near the target gas concentration level, shut off the target gas flow at the regulator.
22. Detach the calibration tubing from the regulator on the target gas source and from the IP filter inlet on the bottom of the sensor.
Manual setup
Manual setup includes all available configuration settings. You may use it to change specific settings configured during initial setup without using the Guided Setup menus. You may also use it to configure advanced optional settings.
Note
Emerson developed the Field Communicator manual setup configuration procedures in this manual using Emerson AMS Trex Device Communicator. The menus are identical to those found in other Field Communicators, but are navigated using touch screens rather than fast keys. Refer to the manual for your handheld communicator device for more information.
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Procedure
1. Connect the HART communicator.
® communications leads to the HART terminals on the handheld
A. +COMM terminal
B. -COMM terminal
WARNING
Explosions
Do not connect to the COMM terminals when an explosive atmosphere is present.
2. Connect the HART communication leads to the COMM terminals on the terminal block.
3. Start your handheld communicator device. If necessary, open the HART Field
Communicator on your handheld device to establish HART communication.
Refer to the manual for your handheld communicator device for more information.
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4. On the Overview screen, select Configure .
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5. On the Configure screen, select Manual Setup .
2.9.1
Postrequisites
Complete
Configuring security settings , and
Configuring device information
as needed.
Configuring display options
The primary variable (gas concentration) is displayed by default on the LCD display.
To configure the display of additional dynamic variable items, do the following:
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Configure display options using Field Communicator
Procedure
1. On the Manual Setup screen, select Display .
2. On the Display screen, select Display Options .
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3. Select a display option or options to alternate displaying with the primary variable
(gas concentration):
• Concentration
• Percent of Range
• Sensor Temp (gas sensor module temperature)
• Electronics Temp (electronics temperature)
• Supply Voltage
4. Select On .
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5. Select OK .
6. Repeat
Step 3 through Step 5 for additional display options.
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7. On the Display Options screen, select Send .
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8. On the Send screen, do one or more of the following:
Rosemount 928
• Select Display Options if you want to review the selected display options.
• Select Cancel to return to the Display Options screen. Pending changes to display options are preserved.
• Select Discard to return to the Display Options screen and discard pending changes. Select OK to confirm or Cancel to return to the previous screen.
• Select Send to send display option changes to the device.
9. Select Back to return to the Manual Setup screen.
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Configure display options using AMS Wireless Configurator
Procedure
1. On the Manual Setup page, select the Display tab.
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2. On the Display tab, select a display option or options to alternate displaying with the primary variable (gas concentrations).
• Concentration
• Percent of Range
• Sensor Temperature (gas sensor module temperature)
• Electronics Temperature
• Supply Voltage
3. Select Send .
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4. In the Confirm Device Configuration Change dialog box, select a reason for the change from the Service Reason list. Select Details if you want to view additional information.
5. Select Yes .
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Configuring security settings
You have the option to configure security settings to protect the device from unauthorized configuration changes.
Configure security settings using a Field Communicator
Procedure
1. On the Manual Setup screen, select Security .
2. Configure the following security settings as required.
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• Write Protect: If you select No (the default option), you may view and edit device configuration settings. If you select Yes , you may view device configuration settings but not edit them.
• Lock Device: If you select Unlock , you may access the device with any host to view and edit configuration settings. If you select Lock (the default option), you
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December 2019 cannot access the device with any host to view and edit configuration settings until a host unlocks the device. To change this option, do the following: a. On the Security screen, select Lock/Unlock .
b. On the Select HART Lock option screen, select Lock or Unlock to change the setting.
c. Select OK .
On the Security screen, the Device is Locked field displays On when the device is locked and Off when the device is unlocked.
• Over the Air Upgrade: If you select Unlock (the default option), you can upgrade the transmitter radio with programming sent over the air. If you select Lock , the transmitter prevents over-the-air radio upgrades.
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Configure security settings using AMS Wireless Configurator
Procedure
1. On the Manual Setup page, select the Security tab.
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2. Configure the following security settings as needed:
• Write Protection: If you select No (the default option) you can view and edit device configuration settings. If you select Yes , you will not be able to view and edit the configuration settings.
• Radio Upgrade: If you select Unlock (the default option), you can upgrade the transmitter radio with programming sent over the air. If you select Lock , you will not be able to upgrade the radio over the air.
• Lock Device: If you select Unlock (the default option), you can access the device with any host to view and edit configuration settings. If you select Lock , you will not be able to access the device with any host to view and edit configuration settings until a host unlocks the device. To change this option, do the following: a. Select Lock/Unlock .
b. In the HART Lock list, select Lock or Unlock to change the setting.
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Rosemount 928 c. Select Finish .
In the HART Lock field, the Device is Locked check box is selected when the device is locked.
3. When you are finished making changes, select Send to update the device configuration.
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Configuring device information
Configure device information using Field Communicator
Procedure
1. On the Manual Setup screen, select Device Information .
2. On the Device Information screen, select any of the following and configure as needed.
• Long tag: Enter an identifier for the device up to 32 characters long using the virtual keypad. The Long tag field is blank by default and does not display if left blank.
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• Tag: Enter an identifier for the device up to eight uppercase alphabetic and numeric characters long using the virtual keypad. The Tag field is left blank by default and does not display if left blank.
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• Descriptor: Enter a description of the device up to 16 alphabetic, numeric, and special characters long. The Descriptor field is blank by default and does not display if left blank.
• Message: Enter a message up to 32 alphabetic, numeric, and special characters long. The Message field is blank by default, does not display if left blank, and may be used for any purpose.
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• Date: Enter a date in mm/dd/yyy format using the virtual keypad. The date may be used for any purpose, such as recording the date of the most recent calibration.
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3. When you have finished making changes, select Send .
4. On the Send screen, do one of the following:
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• Select Cancel to return to the Device Information screen. Pending changes are preserved.
• Select Discard to return to the Device Information screen and discard pending changes. Select OK to confirm or Cancel to return to the previous screen.
• Select Send to send display option changes to the device.
5. Select Back to return to the Manual Setup screen.
Configure device information using AMS Wireless
Configurator
Procedure
1. On the Manual Setup page, select the Device Information tab.
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2. Enter any of the following as needed:
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2.10
2.10.1
• Long tag: Enter an identifier for the device up to 32 characters long. The Long
Tag field is blank by default and does not display if left blank.
• Tag: Enter an identifier for the device up to eight uppercase alphabetic and numeric characters long. The Tag field is blank by default and does not display if left blank.
• Descriptor: Enter a description of the device up to 16 characters long. The
Descriptor field is blank by default and does not display if left blank.
• Message: Enter text up to 32 characters long. The Message field is blank by default, does not display if left blank, and may be used for any purpose.
• Date: Enter a date in mm/dd/yyyy format. The date may be used for any purpose, such as recording the date of the most recent calibration.
3. When you have finished making changes, select Send to update the device configuration.
Advanced options
The following optional, advanced functionality is available to view calibration history for the sensor, set reminders to perform maintenance at regular intervals, and to reset or restore device settings.
Service reminders
You can configure service reminders for regular maintenance tasks such as calibration, bump testing, power module replacement, and sensor replacement. The device issues an
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Service reminders are not recurring. For example, if you create a service reminder to recalibrate the sensor in 90 days, you must create a new reminder for the next service interval by configuring a new service date. The transmitter must be connected to a wireless network to accurately maintain the current date.
Configure service reminders using Field Communicator
Procedure
1. On the Overview screen, select Configure .
2. On the Configure screen, select Alert Setup .
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3. On the Alert screen, select Service Reminder .
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4. On the Service Reminder screen, select Last Service Date .
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5. On the Last Service Date screen, use the numeric keypad to enter the date on which the last service was performed.
6. Select OK .
7. On the Service Reminder screen, select Reminder Mode .
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8. On the Reminder Mode screen, do one of the following:
• Select Disabled to disable the service reminder.
• Select Enabled to enable the service reminder.
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9. Select OK .
10. On the Service Reminder screen, select Reminder Date .
11. On the Reminder Date screen, use the numeric keypad to enter the date when the next service is due.
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12. Select OK .
13. When you are finished, select Send to implement configuration changes.
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Configure service reminders using AMS Wireless
Configurator
Procedure
1. In the Overview pane, select Configure .
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2. On the Configure pane, select Alert Setup .
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3. On the Alert Setup page, select the Service Reminder tab.
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4. In the Service Reminder Mode list, do one of the following:
• Select Disabled to disable the service reminder.
• Select Enabled to enable the service reminder.
5. In the Last Recorded Service Date field, enter the date on which the last service was performed.
6. In the Service Reminder Date field, enter the date when the next service is due.
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7. Select Send .
8. In the Confirm Device Configuration Change dialog box, select a reason from the
Service Reason list. Select Details if you want to view additional information.
2.10.2
9. Select Yes .
Reset or restore device settings
Reset or restore device settings using Field Communicator
Procedure
1. On the Overview screen, select Service Tools .
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2. On the Service Tools screen, select Maintenance .
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3. On the Maintenance screen, select Reset/Restore .
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4. On the Reset/Restore screen, select one of the following:
• Select Device reset to reset the transmitter electronics. This preserves current user configuration settings.
• Select Restore Default Settings to return the monitor, including the currently installed sensor, to its factory default settings. This deletes user configuration settings.
5. Do one of the following:
• Select Cancel to retain the current settings.
• Select Continue to reset configuration settings or to restore factory default settings.
• Select OK to continue.
• Select Cancel to return to the previous screen without making changes.
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Reset or restore device settings using AMS Wireless
Configurator
Procedure
1. In the Overview pane, select Service Tools .
2. In the Service Tools pane, select Maintenance .
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3. Select the Reset/Restore tab.
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4. Do one of the following:
• Select Device reset to reset the transmitter electronics. This preserves current user configuration settings.
• Select Restore Default Settings to return the monitor, including the currently installed sensor, to its factory default settings. This deletes user configuration settings.
5. Follow the steps in the wizard to reset the device or restore factory default settings.
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2.10.3
Configuring local alarm output
If an external device is connected to the transmitter, you can also configure local alarm output options.
Configure local alarm output using a Field Communicator
Complete the following steps to configure local alarm output options using a Field
Communicator.
Procedure
1. On the Overview screen, select Configure .
2. On the Configure screen, select Alert Setup .
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3. On the Alert Setup screen, select Local Output .
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4. On the Local Output screen, select Alarm Limit .
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5. On the Alarm Limit screen, enter a gas concentration limit to trigger the local alarm.
6. Select OK .
7. On the Local Output screen, select Alarm Latching .
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8. On the Alarm Latching screen, select one of the following:
• Not Latched: If you select this option, the local alarm is not latched. This is the default option.
• Latch Conc Alarms: If you select this option, the local alarm output latches for gas concentration alarms. Refer to
for information about resetting latched alarms.
9. Select OK .
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10. On the Local Output screen, select Alarm Output .
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11. On the Alarm Output screen, select one of the following:
• Measurement Value Only: If you select this option, only gas concentration alerts above the specified threshold trigger the local alarm. This is the default option.
• All Measurement Alerts: If you select this option, all gas concentration alerts trigger the local alarm.
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12. Select OK .
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Configure local alarm output using AMS Device Configurator
Procedure
1. In the AMS Device Manager pane, double-click the device icon.
2. Select Configure .
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3. In the Configure pane, select Alert Setup .
4. In the Alarm Limit field, enter an alarm threshold at which to trigger the local alarm output. The default alarm threshold is 5 ppm.
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5. In the Local Alarm Outputs list, select one of the following:
• All Measurement Alerts: If you select this option, all measurement alerts trigger the local alarm. This is the default option.
• Measurement Value Only: If this option is selected, only gas concentration alerts above the specified alarm threshold trigger the local alarm.
6. Select Send .
7. In the Confirm Device Configuration Change dialog box, select a reason from the
Service Reason list. Select Details if you want to view additional information.
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8. Select Yes .
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2.11
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Remove power module
After you have configured the device and the network, remove the power module and replace the rear housing cover. Insert the power module only when the device is ready for commissioning.
CAUTION
The power module may be damaged if dropped from heights in excess of 20 ft. (6.10 m).
Use caution when handling it.
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3
3.1
3.2
Installation
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Installation
Overview
A Rosemount ™ 928 Wireless Gas Monitor Quick Start Guide that includes basic installation and setup information is shipped with each Rosemount 928. Refer to
Dimensional drawings for dimensional drawings of each transmitter variation and mounting
configuration. Refer to Figure B-1
for an instrinsically safe installation drawing.
A Rosemount 628 Gas Universal Gas Sensor Quick Start Guide is shipped with each
Rosemount 628 that is sold separately.
Note
Always install the transmitter with the sensors facing downwards.
Safety messages
Instructions in this section may require special precautions to ensure the safety of personnel performing the operations.
WARNING
Follow installation guidelines.
Failure to follow these installation guidelines could result in death or serious injury.
Ensure that only qualified personnel perform the installation.
If installing an optional customer-supplied external alarm device, verify proper
function. Refer to External alarm device electrical connections
.
WARNING
Explosions
Explosions could result in death or serious injury.
Before connecting a handheld communication device in an explosive atmosphere, ensure that the instruments are installed in accordance with Intrinsically Safe or nonincendive field wiring practices.
Verify that the operating atmosphere of the transmitter is consistent with the appropriate hazardous locations certifications.
When connecting an external device to the Rosemount 928's discrete output in a hazardous area, ensure that the external device is installed in accordance with
Intrinsically Safe or non-incendive field wiring practices.
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3.3.1
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WARNING
Electrical shock
Electrical shock could cause death or serious injury.
Use extreme caution when making contact with the leads and terminals.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following conditions:
This device may not cause harmful interference.
This device must accept any interference received, including interference that may cause undesired operation.
This device must be installed to ensure a minimum antenna separation distance of 7.9
in. (20 cm) from all persons.
The power module may be replaced in a hazardous area. The power module has a surface resistivity greater than one gigaohm and must be properly installed in the wireless device enclosure. Take care during transportation to and from the point of installation to prevent electrostatic charge buildup.
The surface resistivity of the antenna is greater than one gigaohm. To avoid electrostatic charge buildup, do not rub or clean the antenna with solvents or a dry cloth.
Substitution of components may impair intrinsic safety.
Wireless considerations
Power up sequence
Only install the transmitter and all other wireless devices after you have installed the wireless gateway and the gateway is functioning properly. Install the Emerson 701
SmartPower ™ Module - Black into the transmitter to power the device. Power up wireless devices in order of proximity from the gateway, beginning with the closest. This results in a simpler and faster network installation. Enable active advertising on the gateway to ensure that new devices join the network faster. Refer to the reference manual for your wireless gateway for more information.
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Antenna position
Position the antenna vertically straight up and, if the application requirements allow, approximately three feet (one meter) from any large structure, building, or conductive surface to allow for clear communication with other devices.
Figure 3-1: Antenna Position
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Conduit entries
Upon installation, ensure that each conduit entry is either sealed with a conduit plug using appropriate thread sealant or has a conduit fitting or cable gland installed with appropriate thread sealant.
Figure 3-2: Conduit Entries
3.3.4
A. Conduit entries
Choosing an installation location and position
When choosing an installation location and position, take into account access to the transmitter for ease of power module and sensor replacement. For best performance, install the antenna vertically with space between objects in a parallel metal plane, such as a pipe or metal framework, as the pipes or framework may adversely affect the antenna's performance.
The Rosemount 928 is a diffusion-based gas monitor. This means that the target gas must actually come into contact with the electrochemical sensor for the device to register a signal. Each target gas has a unique density and behaves differently depending on the density of the surrounding atmosphere. For example, hydrogen sulfide is considered a heavier-than-air gas and tends to settle in low-lying areas when released into the air.
Install all transmitters with the sensor module facing downwards. Install devices with sensors for heavier-than-air gases close to ground level, ideally between 12 in. (30.5 cm) above the ground and a breathing zone of a worker (3- 6 ft. [0.9 - 1.8 m] above grade level).
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3.4
3.4.1
3.4.2
3.5
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Electrical
Handling the power module
The Rosemount 928 is self-powered. The included Emerson 701 SmartPower Module-
Black contains two "C" size primary lithium/thionyl chloride batteries. Each battery contains approximately .1 oz. (2.5 grams) of lithum, for a total of .2 oz. (5 grams) in each pack. Under normal conditions, the battery materials are self-contained and are not reactive as long as the batteries and the power module are maintained. Take care to prevent thermal, electrical, or mechanical damage. Protect contacts to prevent premature discharge.
CAUTION
Equipment damage
The Power Module may be damaged if dropped from heights in excess of 20 ft. (6 m).
Use caution when handling the power module.
Making electrical connections (Rosemount 928XSS01 and 928XUT01 only)
Make electrical connections through the cable entry in the side of the connection head. Be sure to provide adequate clearance for cover removal.
Verify operating atmosphere
Verify that the operating atmosphere of the transmitter and the sensor is consistent with the appropriate hazardous locations certifications.
Table 3-1: Temperature Guidelines
Operating limit
-40 to 140 °F
-40 to 60 °C
Transmitter storage limit
-40 to 185 °F
-40 to 85 °C
Sensor storage recommendation
34 to 45 °F
1 to 7 °C
Note
The electrochemical cells in the sensor have a limited shelf life. Store sensor modules in a cool location that is not excessively humid or dry. Storing sensors for long periods may shorten their useful service life.
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3.6.1
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Install the transmitter
The transmitter is designed to use the B4 Universal Mounting Bracket. This curved, stainless steel bracket includes a U-bolt and fasteners for mounting the transmitter to a 2in. (50.8 mm) pipe or pole. The B4 bracket attaches directly to the transmitter. You can also use the B4 bracket in other mounting configurations, such as mounting the transmitter to a wall or a panel.
Pipe mount
Required equipment
• Mounting kit (part number 03151-9270-0004)
— One 2-in. (50.8 mm) U-bolt assembly
— One B4 mounting bracket
— Two 5/16-18 x 1 ¼ -in. bolts
— Two washers
• A ¼ -in. combination wrench and adjustable wrench
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Figure 3-3: Pipe Mounting
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3.6.2
Dimensions are in inches [millimeters].
A. 2-in. bolt for pipe mounting (clamp shown)
B. 5/16-18 x 1 ¼ -in. bolts for transmitter mounting
Panel mount
Required equipment
• Mounting kit (part number 03151-9270-0004)
— One B4 mounting bracket
— Two ¼ -in. x 1 ¼ -in. bolts
• A 5/16-in. combination wrench or adjustable wrench
• A ¼ -in. combination wrench or adjustable wrench
• Two 5/16-18 bolts with nuts and washers (not included)
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Figure 3-4: Panel Mounting
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3.7
A. 5/16-18 bolts for panel mounting (not supplied)
B. 5/16-18 x 1 ¼ -in. bolts for transmitter mounting
Dimensions are in inches [millimeters].
Rotate LCD display
You can rotate the LCD display in 90 degree increments by squeezing the two tabs, pulling the LCD display out, rotating it, and snapping it back into place.
Note
Although you can rotate the LCD display, always install the transmitter with the sensor facing downwards.
If the LCD display pins are inadvertently removed from the interface board, carefully reinsert the pins before snapping the LCD display back into place.
Note
Use only Rosemount Wireless LCD Display part number 00753-9004-0002.
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3.8
3.9
Rosemount 928
Ground the transmitter
The transmitter operates with the housing grounded or floating. Floating systems, however, can cause extra noise that may affect many types of readout devices. If the signal appears noisy or erratic, grounding at a single point may solve the problem. Ground the electronics enclosure in accordance with local and national installation codes. Ground the electronics using the internal or external case grounding terminal.
External alarm device electrical connections
The discrete output of the transmitter (Rosemount 928XSS01 and 928UTX01) can trigger an optional, customer-supplied external alarm device.
Note
The transmitter cannot power external devices. It acts as a switch that closes the power circuit of a connected external device when activated by a gas concentration threshold if configured to do so.
You can configure an external power supply and alert device to issue a local alarm when the detected gas concentration level exceeds the specified high concentration threshold.
You can configure the local alarm to latch the alarm output until the alarm is manually cleared or query the device to detect whether this option is installed. Examples of alarm mechanism options include:
• Audible alarm
• Visual alarm (for example, a flashing light)
• Initiate action (for example, close valves, initiate facility evacuation, call emergency services)
WARNING
Alarm
If installing an optional, customer-supplied external alarm device, verify proper function.
Verify that gas concentrations in the area have dissipated to a safe level before clearing local or digital alarms.
When connecting an external device to the monitor's discrete output in a hazardous area, ensure that the external device is installed in accordance with Intrinsically Safe or non-incendive field wiring practices.
The transmitter does not need to be connected to a wireless network for the external alarm device to function. However, the low battery, no measurement, or sensor failure alerts will not be available.
There are two possible connection methods for the external alarm device:
• Four-wire: This connection method (most common) uses a set of two wires for an
Intrinsically Safe (IS) input power supply. Another set of two input wires is used for a separate IS alarm mechanism.
• Two-wire: This connection method combines an IS power source, such as an internal battery, and alarm device into one package.
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You may also add an optional, customer-supplied alarm suppression button.
Connect an external alarm device
Procedure
1. On the transmitter's main housing, remove the rear housing cover to expose the terminal block.
114
A. +Barrier power
B. -Barrier power
C. +Output to alarm
D. -Output to alarm
E. +Comm terminal
F. -Comm terminal
2. On the main housing, remove one of the conduit plugs.
.
3. Route the barrier power and alarm output wiring into the main housing.
4. Connect the wiring to the external device on the terminal block according to the terminal labels. Do one of the following:
Note
Shield alarm wiring for noise immunity.
• Perform four-wire installation. This is the most common configuration. Refer to
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Figure 3-5: Four-Wire Installation
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A. Intrinsically Safe power (in)
B. External alarm
C. External alarm suppression button (optional)
•
Perform two wire installation. Refer to Figure 3-6 .
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Figure 3-6: Two-Wire Installation
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A. Voltage in
B. External alarm with Intrinsically Safe power
C. External alarm suppression button (optional)
5. Connect the wiring to the external device according to the manufacturer's instructions.
6. Verify that the external device functions properly.
a) Perform a bump test.
Refer to
.
b) If available, use the external device's manual test function to verify proper function.
Refer to the external device documentation for more information.
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4.1
Commissioning
December 2019
Commissioning
Safety messages
Instructions and procedures in this section may require special precautions to ensure the safety of personnel performing the operations.
WARNING
Follow installation guidelines.
Failure to follow these installation guidelines could result in death or serious injury.
Ensure that only qualified personnel perform the installation.
WARNING
Explosions
Explosions could result in death or serious injury.
Before connecting a handheld communication device in an explosive atmosphere, make sure the instruments are installed in accordance with Intrinsically Safe or nonincendive field wiring practices.
Verify that the operating atmosphere of the transmitter is consistent with the appropriate hazardous locations certifications.
WARNING
Electrical shock
Electrical shock could cause death or serious injury.
Use extreme caution when making contact with the leads and terminals.
The power module may be replaced in a hazardous area. The power module has a surface resisitivity greater than one gigaohm and must be properly installed in the wireless device enclosure. Take care during transportation to and from the point of installation to prevent electrostatic charge buildup.
The surface resistivity of the antenna is greater than one gigaohm. To avoid electrostatic charge buildup, do not rub or clean the antenna with solvents or a dry cloth.
Substitution of components may impair intrinsic safety.
Note
Only install the transmitter and all other devices after you have installed the wireless gateway and the gateway is functioning properly. Power up wireless devices in order of proximity from the wireless gateway, beginning with the device closest to the wireless gateway. This will result in a simpler and faster network installation.
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Verify wireless network communication
In order for the transmitter to communicate with the wireless gateway, and ultimately the host system, you must configure the transmitter to communicate with the wireless network. This step is the wireless equivalent of connecting wires from a transmitter to the host system. If the network ID and join key are not identical, the transmitter will not communicate with the network.
You may obtain the network ID and join key from the Wireless Gateway on the Setup →
Network → Settings
page on the web server, shown in Figure 4-1
.
Figure 4-1: Wireless Gateway Network Settings
4.2.1
Refer to
Joining the transmitter to a wireless network .
Verify network join status
The chevron-shaped status bar at the top of the LCD screen indicates the progress of the network join process. When the status bar is filled, the device is successfully connected to the wireless network.
Refer to
Device diagnostic LCD display screens .
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4.2.2
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Verify communication using Field Communicator
Procedure
1. On the Overview screen, select Service Tools .
Rosemount 928
2. On the Service Tools screen, select Communications .
3. Verify the following communications information.
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• Communication status: Displays whether the device is connected to the wireless network.
• Join Mode: Displays the current join mode. Select Join Mode to change the way that the device joins the wireless network.The default option is Attempt to join immediately on powerup or reset . Select Send twice to update the join mode.
4.2.3
120
• Neighbor Count: Displays the number of available neighboring devices.
• Advertisement Count: Displays the number of advertisement packets received.
4. When finished, select Back to return to the Communications screen.
Verify communication using AMS Wireless Configurator
Complete the following steps to verify communications on the device using the AMS
Wireless Configurator.
Procedure
1. Open AMS Wireless Configurator.
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2. In the Device Manager pane, expand the wireless network menu.
3. Expand the wireless gateway menu.
4. Select the device list.
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5. In the device panel, double-click the device icon.
6. Select Service Tools .
7. In the Service Tools pane, select Communications .
4.2.4
8. On the Communications tab, in the Join Status field, verify that all four network join steps are completed.
Verify communication using the Wireless Gateway
Open the Wireless Gateway web interface. This page shows whether the device has joined the network and is communicating properly.
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4.4
4.5
122
Using Field Communicator to change the network ID and join key
If you need to change the network ID and join key, refer to
.
Using AMS Wireless Configurator to change the network ID and join key
If you need to change the network ID and join key, refer to
.
Verify operation
There are four ways to verify operation:
• Transmitter LCD display
• Handheld communication device
• Wireless Gateway's integrated web interface
• AMS Device Manager
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If you have configured the transmitter with the network ID and join key and sufficient time has passed, the transmitter will be connected to the network. When the device has joined the network, it will be displayed in AMS Device Explorer.
Figure 4-2: AMS Device Explorer
4.5.1
Verify LCD display operation
Procedure
1. Verify that the display items are correct.
The LCD displays the primary variable (Gas Concentration) by default. The other variables are:
• Secondary variable (Gas Sensor Module Temperature)
• Tertiary variable (Electronics Temperature)
• Quaternary variable (Supply Voltage)
You may configure these variables to alternate displaying with the primary variable
at the configured update rate. Refer to Configuring display options
if you need to change the display items.
2. Verify that the display mode is correct.
Refer to Configuring the device display mode if you need to change the display
mode.
• Disabled: The display is turned off. This is useful if the display will never be viewed locally.
• On Demand: The display is on when the transmitter is connected to a handheld communication device or when it receives a signal from its Wireless Gateway.
• Periodic: The display is on only during updates at the configured update rate.
• High Availability: The display is always on regardless of the configured update rate. This is the default display mode option.
3. Press the Diagnostic button to display the TAG , Device ID , Network ID , Network Join
Status , and Device Status screens.
Refer to Device diagnostic LCD display screens
.
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4.7
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If there is an immediate alarm
WARNING
Alarm
If the device joins the network and immediately issues an alarm, respond as though the alarm is real until it is proven false.
If the alarm is false, it is likely due to sensor configuration. Verify the sensor configuration, alert set points, and alarm set points.
Troubleshoot communication
If the device is not joined to the network after power up, verify the correct configuration of the network ID and join key and verify that active advertising has been enabled on the wireless gateway. The network ID and join key in the device must match the network ID and join key of the wireless gateway.
You may obtain the network ID and join key from the wireless gateway on the Setup →
Network → Setttings page on the web interface. You may change the Network ID and Join
Key if necessary. Refer to Joining the transmitter to a wireless network .
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5
5.1
Operation and maintenance
December 2019
Operation and maintenance
Safety messages
Instructions and procedures in this section may require special precautions to ensure the safety of personnel performing them.
WARNING
Follow installation guidelines.
Failure to follow these installation guidelines could result in death or serious injury.
Ensure that only qualified personnel perform the installation.
Replace Rosemount 628 Universal Gas Sensors if the tabs do not latch as intended.
WARNING
Explosions
Explosions could result in death or serious injury.
Before connecting a handheld device in an explosive atmosphere, ensure that the instruments are installed in accordance with Intrinsically Safe or non-incendive field wiring practices.
When connecting an external device to the Rosemount 928's discrete output in a hazardous area, ensure that the external device is installed in accordance with
Intrinsically Safe or non-incendive field wiring practices.
Verify that the transmitter operating atmosphere is consistent with the hazardous location certifications.
WARNING
Electrical shock
Electrical shock could cause death or serious injury.
Use extreme caution when making contact with the leads and terminals.
The power module may be replaced in a hazardous area. The power module has a surface resistivity greater than one gigaohm and must be properly installed in the wireless device enclosure. Take care during transportation to and from the point of installation to prevent electrostatic charge buildup.
The surface resistivity of the antenna is greater than one gigaohm. To avoid electrostatic charge buildup, do not rub or clean the antenna with solvents or a dry cloth.
Substitution of components may impair intrinsic safety.
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5.2
5.2.1
LCD display screens
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Startup LCD display screens
The following screens display when the power module is installed in the transmitter.
All Segments On : Used to visually determine if there are any bad segments on the LCD.
X X X X X
X X X X x x x x x x x x x
702
W I r e l s
ABCDE
FGH
Device Identification : Used to determine the device type.
Device Information Tag : User-created tag eight characters long; will not display if all characters are blank.
Software Revision : Displays the current revision level.
5.2.2
D E V
FAILUR
Device Status Information : The device has detected an electronics or memory fault.
Periodic LCD display screens
The periodic screens display during device startup after the startup screens and display after the diagnostics screens when you press the Diagnostics button.
Primary Variable (PV) screen: Displays the gas concentration level in the configured unit of measure.
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Secondary Variable (SV) screen: Displays the gas sensor module temperature.
Tertiary Variable (TV) screen: Displays the electronics temperature.
D E V
2 5. 2 5
DEG C
SUPLY
7. 2 1
VOLTS
Quaternary Variable (QV) screen) : Displays the supply voltage reading at the supply power terminals.
Percent of Range screen: Displays the percent of range.
ALERT
PRESNT
Alert screen: Displays when at least one alert is active. This screen does not display if no alerts are active.
Gas Alert screen: Displays when the local discrete alert output or process alert for a gas concentration level is active. This screen does not display if no alerts are active.
5.2.3
Diagnostic button LCD display screens
These screens display automatically when the device is operating properly and you have pressed the Diagnostic button. These screens also display during startup.
Device Information Tag : A user-created tag eight characters long that does not display if all characters are blank.
ABCDE
FGH
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W I r e l s
Device Identification : Displays the device's unique identifier used in the HART ® long address.
Software Revision : Displays the current software revision level.
NETWK
13 0 5
I D
Network ID : Assuming that the device has the correct join key, this screen displays the ID of the network with which the device can connect.
Network Unknown : The DIM (feature board) has not retrieved network information from the NIM. The chevron bar graph displays 0 percent.
Network Initializing: The NIM is starting and waiting to complete its boot sequence. The chevron bar graph displays 25 percent.
Network Idle : The NIM is accepting configuration commands and waiting for the Join process to begin. The chevron bar graph displays 25 percent.
Network Disconnect : The NIM is disconnected and requires a Force Join to exit this mode.
Network Searching : The NIM is actively searching for the network. The chevron bar graph displays 50 percent.
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Network Negotiating : The NIM is joining the network. The chevron bar graph displays 50 percent.
Network Connecting : The NIM has joined the network, but is not yet able to send data. The chevron bar graph displays 50 percent.
Network Limited Operation : The NIM has joined the network and is operational, but with limited bandwidth for sending periodic data. The chevron bar graph displays 75 percent.
Network OK : The device has joined a network and has been fully configured and has multiple parents. The chevron bar graph displays 100 percent.
5.2.4
Device diagnostic LCD display screens
The following screens display the device diagnostics depending on the state of the device and appear after the Diagnostic button screen sequence.
Electronics Failure : There is a critical error which may prevent the DIM (feature board) from operating correctly. Check additional status screens for more information about the failure source.
Electronics Warning : There is a warning that needs to be addressed, but should not affect device output. Check additional status screens for more information about the warning source.
SUPLY
FAILUR
Supply Failure : The terminal voltage has dropped below the minimum level for safe operation. Variable readings, writing to non-volatile memory, and database storage may be susceptible to failure.
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SUPLY
LOW
Supply Low : The terminal voltage is below the recommended operating range.
For battery-operated devices, replace the power module. For line powered devices, increase the supply voltage.
Radio Failure : The device cannot retrieve parameter information from the radio in the device. The device may still be operational and publishing HART ® data.
RADIO
FAILUR
CONFG
FAILUR
Configuration Failure : Invalid configuration of the transmitter may affect critical operation of the device. Check the extended configuration status to identify which configuration items require connection.
CONFG
WARN
Configuration Warning : Invalid configuration of the transmitter may affect noncritical operation of the device. Check the extended configuration status to identify which configuration items require correction.
SNSR
FAILUR
Sensor Failure : The sensor attached to the transmitter has failed; valid readings from that sensor are no longer possible. Check the sensor connections. Check additional status for more detailed information about the failure source.
Sensor Warning : The sensor attached to the transmitter has degraded; readings from that sensor may not be accurate. Check the sensor and sensor wiring connections. Check additional status for more detailed information about the failure source.
Bandwidth Limited : The device has not received all of the requested wireless bandwidth required to operate as configured.
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5.2.5
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Other LCD display screens
Diagnostic Button Stuck : This screen displays if the Diagnostic button is pressed and held for too long or is active upon device startup.
5.3
Rosemount 928
Software features
The following features are available in the Rosemount 928 software.
• Alert History: Displays latched device status alerts issued due to errors and warnings.
You may clear latched status alerts manually by using the Clear Alert History command, by resetting the device, by cycling device power, or by changing device configuration settings.
• Clear Alert History: Manually clears the alerts displayed in Alert History . You cannot clear active alerts. You can also clear alert history by resetting the device or cycling device power.
• Process Alerts: Up to eight process alerts are available to trigger alerts when device variables exceed the configured alert threshold.
• Sensor Module Information: Information about the installed sensor module includes gas name, gas module type, serial number, date of manufacture, hardware revision level, software revision level, gas module compatibility revision level, and minimum feature board compatibility revision level. This is useful for review and tracking.
• Service Reminders: If selected, displays reminders when the installed gas sensor module is due for service based on the specified service date (the date on which the gas sensor module was last calibrated).
• Calibration History: Displays the calibration history of the installed gas sensor module.
• Gas Module Replacement: Displays a notification that the gas sensor module must be replaced soon. This can only be resolved by replacing the gas sensor module.
• Revert to Previous Gas Module Calibration: Restores the previously-stored gas module calibration settings. This is useful when a gas calibration result is unsatisfactory. You cannot successfully execute this command if the most recent calibration has been stored to history or if the device has been reset.
• Store Calibration to History: Stores the current gas module calibration settings in the calibration history log. Once you have executed this command or reset the device, reverting to the previous calibration is impossible.
• Local Alarm Output: If the device is equipped with this option, an external power supply and alert mechanism issue a local alarm when the detected gas concentration level exceeds the specified high concentration threshold. You can configure the local alarm to latch the alarm output until the alarm is manually cleared. Latched alarms do not remain latched following a device reset or power module failure. You may query the device to detect whether this option is installed. Examples of alarm mechanism options include:
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— Audible
— Visual (for example, a flashing light)
— Initiate action (for example, close valves, initiate facility evacuation, call emergency services)
WARNING
Verify that gas concentrations in the area have dissipated to a safe level before clearing local or digital alarms.
• Gas Concentration Alarm Configuration: Displays the configuration settings for local and digital gas concentration alarms when the detected gas concentration level exceeds the specified high concentration threshold. This option allows configuring the following gas alarm options:
— High Concentration Threshold: Gas concentration level alarm is activated when the detected gas concentration exceeds the specified high concentration threshold.
— Alarm Latching: If you select Latch Gas Alarm , the alarm output is latched until you manually clear the alarm. If you select Not Latched , the alarm clears automatically when the gas concentration level dissipates below the specified high concentration threshold.
— Alert Handling: If you select Alert Triggers Gas Alarm , the device issues an alarm in case of a device failure alert. If you select Alerts do not Trigger Gas
Alarms , the device only issues an alarm when the detected gas concentration level exceeds the specified alarm threshold.
• Configurable Update Rate: Specifies the wireless update rate. The range is 1 second to
60 seconds. The default update rate is eight seconds. Refer to
• Gas Concentration Filtering: This setting controls the filtering of gas concentration measurements. By default, Report Small Readings as Zero is selected. Filtering is temporarily disabled during calibration. The options are:
— No Filtering: When you select this setting, all gas concentration measurements are reported at their actual values.
— Truncate Values Below Zero: Gas concentration measurements less than zero are reported as zero.
— Report Small Readings as Zero: Gas concentration measurements near zero but
within the degree of uncertainty are reported as zero. Refer to Table 5-1 for the
degree of uncertainty based on gas type.
Table 5-1: Degrees of Uncertainty
Gas type
Hydrogen sulfide (H
2
S)
Oxygen (O
2
)
Carbon monoxide (CO)
Degree of uncertainty
0.5 ppm
0.2 ppm
3 ppm
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5.4
5.4.1
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Resetting latched alarms
You can clear latched alarms by removing and reinstalling the power module to power the device off and back on again.
Refer to
and
. Latched alarms do not remain latched following a device reset or power mode failure. You can also clear latched alarms by using the Reset Latched Alarms functions in Field Communicator or AMS
Wireless Configurator.
Reset latched alarms using Field Communicator
Procedure
1. On the Overview screen, select Service Tools .
2. On the Service Tools screen, select Maintenance .
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3. On the Maintenance screen, select Reset/Restore .
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4. On the Reset/Restore screen, select Reset Latch .
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5. On the Latched alarm will be deactivated screen, select Continue .
6. Select OK .
7. On the Reset Latch screen, select OK .
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Reset latched alarms using AMS Wireless Configurator
Procedure
1. In AMS Wireless Configurator, select Service Tools .
2. In the Service Tools pane, select Maintenance .
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3. Select the Reset/Restore tab.
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4. On the Reset/Restore tab, select Reset Latched Alarms .
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5. On the Reset Latched Alarms window, select Continue - Reset the latched alarm .
6. On the Reset Latched Alarms window, select Next .
7. Select Next .
8. Select Finish .
Note
You can also access Reset Latched Alarms in Field Communicator and in AMS Wireless
Configurator by navigating to Service Tools → Active Alerts and Configure → Alert
Setup → Process Alerts .
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5.5.1
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Clearing process alarm history
You can view and clear process alarm history using Field Communicator or AMS Wireless
Configurator.
Clear process alarm history using Field Communicator
Procedure
1. On the Overview screen, select Service Tools .
2. On the Service Tools screen, select Alerts .
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3. On the Alerts screen, select History .
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4. On the History screen, select Clear Alert History .
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5. On the Alert history will be erased screen, Yes is selected by default. Select OK to erase alert history.
6. On the Clear Alert History screen, select OK to confirm.
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7. On the Alerts screen, verify that alert history is no longer available.
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5.5.2
8. Select Back to return to the Service Tools screen.
Clear process alarm history using AMS Wireless
Configurator
Procedure
1. In AMS Wireless Configurator, select Service Tools .
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2. In the Service Tools pane, select Alerts .
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3. Select the History tab.
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4. On the History tab, select Clear Alert History .
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5. On the Active Alerts tab, verify that the alert history is cleared.
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5.6
5.6.1
Calibration history
You can view previous calibration settings for the currently installed gas sensor module.
View calibration history using a Field Communicator
Procedure
1. On the Overview screen, select Service Tools .
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2. On the Service Tools screen, select Maintenance .
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3. On the Maintenance screen, select Routine Maintenance .
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4. On the Routine Maintenance screen, select Calibration .
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5. On the Calibration screen, select Read History .
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6. On the Calibration screen, select View History .
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5.6.2
The View History screen displays the calibration history for the installed sensor.
7. When you have finished viewing calibration history, select Back to exit.
View calibration history using AMS Wireless
Configurator
Procedure
1. On the Overview screen, select Service Tools .
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2. In the Service Tools pane, select Maintenance .
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3. On the Routine Maintenance tab, select Calibration .
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4. On the Calibration tab, select Read Calibration History .
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In the Calibration History field, the calibration history for the installed sensor is displayed.
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5.7
5. When you have finished viewing calibration history, select Close .
Sensor log
You can view status, process variable, and diagnostic history for the currently installed
Rosemount 628.
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View the sensor log using Field Communicator
Procedure
1. On the Overview screen, select Service Tools .
2. On the Service Tools screen, select Maintenance .
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3. On the Maintenance screen, select Routine Maintenance .
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4. On the Routine Maintenance screen, select Sensor Log .
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5. On the Select a database search method screen, select a database search method.
• Oldest Record: View the oldest record first. This is the default option.
• Newest Record: View the newest record in the database first.
• Search for a Specific Time Stamp: Enter a specific time stamp by which to view records, including the date and time.
6. Select OK .
7. On the Found a record screen, view the sensor log information. Do one of the following:
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• Select Read Next Record to go to the next record in the sensor log based on the selected database search method. This is the default option.
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• Select Show Additional Status to view more information from the selected record. This option is available only if additional information is available for the selected record.
• Select Exit to leave the sensor log.
8. When finished viewing sensor log records, click Exit .
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View sensor log using AMS Wireless Configurator
Procedure
1. On the Overview screen, select Service Tools .
2. In the Service Tools pane, select Maintenance .
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3. On the Routine Maintenance tab, select Sensor Log .
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4. On the Select a database search method screen, select a database search method.
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• Oldest Record: View the oldest record first. This is the default option.
• Newest record: View the newest record in the database first.
• Search for a Specific Time Stamp: Enter a specific time stamp by which to view records, including the date and time.
5. Select Next .
6. On the Found a record screen, view the sensor log information. Do one of the following:
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• Select Read Next Record to go to the next record in the sensor log based on the selected database search method. This is the default option.
• Select Show Additional Status to view more information from the selected record. This option is available only if additional information is available for the selected record.
5.8
Rosemount 928
• Select Exit to leave the sensor log.
7. When you have finished viewing sensor log records, select Exit .
8. Select Finish .
Bump testing
Bump testing is a process by which the target gas is introduced to the sensor to verify that the device is functioning properly. Bump testing does not replace calibration. Emerson recommends bump testing throughout the sensor's service life as prescribed by your facility preventative maintenance procedures.
If bump testing fails, recalibrate the sensor. Refer to Calibrating the sensor . If the sensor
fails to accept a new calibration, replace it. Refer to Replace the gas sensor .
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WARNING
Before performing the next step, verify that the regulator is closed to avoid releasing gas into the air during calibration.
Bump testing may trigger alarms. If alarms are configured to initiate action (for example, close valves, initiate facility evacuations, call emergency services) or to trigger alarms in the host system, take precautions to prevent unwanted automated responses during bump testing.
Procedure
1. Install a regulator on the target gas source.
2. Attach a length of calibration tubing from the regulator on the target gas source to the IP filter inlet on the bottom of the sensor.
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3. Release the target gas from the target gas source.
Emerson recommends a flow rate of 0.2642 gpm (1.0 lpm) to ensure a consistent sensor reading.
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5.9
5.10
5.11
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Note
If you need a long length of calibration tubing to reach the device, make allowances for a delay in response time from the sensor while the target gas travels the length of the calibration tubing.
A gas concentration begin to register on the device display and gradually increases to the target gas concentration level.
4. Shut off the target gas flow at the regulator.
5. Detach the calibration tubing from the regulator on the target gas source to the IP filter inlet on the bottom of the transmitter.
Calibration
Calibrate at least every 180 days throughout the detector's service life.
Refer to
.
Sensor storage
Follow these recommendations when storing the sensor.
• Store the sensor in its original sealed packaging with the IP filter side facing downward.
• To avoid damaging sensor electrodes, do not stack sensors on top of each other.
• Do not store or install the sensor in areas where it may be subject to solvent vapors.
Doing so may result in any or all of the following:
— Blocked sensor electrodes
— Damaged sensor electrodes
— Damaged sensor body
— False baselines
Replace the gas sensor
The sensor is connected to the transmitter assembly by means of two tabs, which fit into the bottom portion of the housing. The seal between the transmitter housing and the sensor assembly is designed so that the fit is airtight between the two assemblies when the sensor is properly installed. Replace sensor if the tabs do not latch as intended.
Sensor life varies based on the sensing technology, the installation environment, and the ambient conditions in that environment. Typically, electrochemical sensors last from one and a half years to two years. You must replace a sensor when it cannot accept a new calibration due to having reached the end of its service life.
Procedure
1. Remove the old sensor assembly by firmly grasping both tabs and squeezing them together while simultaneously pulling downwards on the sensor assembly. If necessary, apply a slight rocking or twisting motion to remove the sensor.
2. Install the new sensor assembly.
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00809-0100-4928 a) Before installing the new sensor, take note of the alignment of the keying features on the sensor housing.
b) Align the tabs on the side of the sensor assembly housing.
c) Firmly push the sensor assembly into place until both tabs are fully latched to ensure a firm seal.
3. Calibrate the new sensor.
Refer to Calibrating the sensor .
4. Allow the transmitter to warm up before continuing.
for maximum warm-up times based on gas type. During the warm -up period, the displayed values, alerts, and concentrations will not reflect actual measurements; readings will not be transmitted.
Table 5-2: Maximum Warm-up Periods
Gas type
Hydrogen sulfide (H
2
S)
Oxygen (O
2
)
Carbon monoxide (CO)
Maximum warm-up period
One minute
Seven minutes
One minute
Replace the power module
Expected power module life is 5.8 years at reference conditions.
As shown in the following table, actual power module life expectancy in the field depends upon factors such as wireless update rate, network design, environmental conditions, and
LCD settings.
CAUTION
If you do not replace the power module promptly, the device will cease to function.
Replace the power module as soon as possible after receiving a low battery warning.
You may replace the power module in a hazardous area. The power module has a surface resistivity greater than one gigaohm, and you must install it properly in the wireless device enclosure. Take care during transportion to and from the point of installation to prevent electrostatic charge buildup.
(1) Reference conditions are 70 °F (21 °C), wireless updates of once per minute, and routing data for three additional network devices.
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Table 5-3: Power Module Life Expectancy
No data routing (77 °F [25 °C])
4
8
16
32
60
1
2
Update rate LCD off lifespan
(years)
2.1
3.3
3.8
4.4
5.1
5.3
5.4
3.4
3.9
4.4
4.6
4.7
LCD on lifespan
(years)
2.0
3.0
16
32
60
4
8
1
2
Routing data for three other devices (77 °F
[25 °C])
Update rate LCD off lifespan
(years)
LCD on lifespan
(years)
1.1
2.0
2.7
3.6
1.1
1.9
2.5
3.3
4.5
5.0
5.1
4.0
4.3
4.5
Procedure
1. Remove the rear housing cover from the transmitter.
2. Remove the depleted power module.
3. Install a new Emerson 701 SmartPower ™ Module - Black.
4. Replace the rear housing cover and tighten it to specifications. Tighten until metal touches metal to ensure a proper seal, but do not overtighten.
5. Allow the transmitter to warm up before continuing.
for maximum warm-up times, based on gas type. During the warm-up period, the displayed values, alerts, and gas concentrations will not reflect actual measurements; the device will not transmit readings.
Table 5-4: Maximum Warm-up Periods
Gas type
Hydrogen sulfide (H
2
S)
Oxygen (O
2
)
Carbon monoxide (CO)
Maximum warm-up period
One minute
Seven minutes
One minute
Handling the power module
The Emerson 701 SmartPower ™ Module - Black included with each Rosemount 928 contains two "C" size primary lithium/thionyl chloride batteries. Each battery contains approximately .08 oz. (2.5 grams) of lithium, for a total of .18 oz. (5 grams) in each pack.
Under normal conditions, the battery materials are self-contained and are not reactive as long as the batteries and the battery pack integrity are maintained. Take care to prevent thermal, electrical, or mechanical damage. Protect contacts to prevent premature discharge.
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CAUTION
The power module may be damaged if dropped from a height in excess of 20 ft. (6 m).
Use caution when handling the power module.
Battery hazards remain when cells are discharged.
Environmental considerations
As with any battery, consult local environmental rules and regulations for proper management of spent batteries.
If no specific requirements exist, Emerson encourages recycling through a qualified recycling facility. Consult the materials safety data sheet for battery specific information.
Shipping considerations
Emerson shipped the unit to you without the power module installed. Remove the power module prior to shipping.
Each power module contains two "C" size primary lithium batteries. The US Department of
Transportation regulates primary lithium batteries in transportation, and the International
Air Transport Association (IATA), International Civil Aviation Organization (ICAO), and
European Ground Transportation of Dangerous Goods (ARD) also cover primary lithium batteries. The shipper is responsible for ensuring compliance with these or any other local requirements. Consult current regulations and requirements before shipping.
Blue Power Module
Alternatively, you can power the transmitter with the SmartPower ™
(Part Number MHM-89004).
Blue Power Module
Refer to the Emerson 701P SmartPower Module - Blue Quick Start Guide for instructions on installing and replacing this alternative power module.
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Operation and maintenance
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Replace the Ingress Protection filter
The Ingress Protection (IP) filter (part number 00628-9000-0001) protects the sensor inside the gas sensor module from ingress of fluids and solids. Replace the IP filter if it becomes clogged with foreign matter.
CAUTION
Ingress Protection (IP) filter
If you don't install the IP filter, damage may occur to the sensor inside the gas sensor module.
Do not operate the transmitter without the correct IP filter installed in the gas sensor module.
When installing the IP filter, verify that the IP filter gasket is in place, is properly aligned,
and is not blocking the white filter media. Refer to Figure 5-1
.
When handling the IP filter, avoid contact with the filter media.
Verify that all three legs are fully latched by pushing upward on each leg of the IP filter.
Avoid getting water inside the IP filter.
Do not attempt to clean the IP filter.
Do not rinse or spray the IP filter with water.
Do not immerse the IP filter in water.
Figure 5-1: IP Filter
Rosemount 928
A. IP filter housing
B. IP filter gasket
C. Filter media
Procedure
1. Remove the IP filter from the underside of the gas sensor module housing by compressing the three snap tabs and pulling the IP filter downwards.
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2. Verify that the keying features on the new IP filter are aligned with those on the gas sensor module housing.
3. Push the new IP filter (part number 00628-9000-0001) upward into the gas sensor module housing and gently push each tab until the three tabs click into place.
5.14
Service support
To expedite the return process outside of North America, contact your Emerson representative.
Within the United States, call the Emerson Response Center toll-free number
1-800-654-7768. This center is available 24 hours a day to assist with any needed information or materials.
The Response Center will ask for product model and serial numbers and will provide a
Return Material Authorization (RMA) number. The Response Center will also ask for the process materials to which the product was last exposed.
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WARNING
Hazardous substances
Individuals who handle products exposed to a hazardous substance can avoid injury if they are informed of and understand the hazard. If the product being returned was exposed to a hazardous substance as defined by the Occupational Safety and Health Administration
(OSHA), a copy of the required Material Safety Data Sheet (MSDS) for each hazardous substance identified must be included with the returned goods.
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6
6.1
6.2
6.2.1
6.2.2
6.2.3
Troubleshooting
December 2019
Troubleshooting
Overview
The following sections provide troubleshooting suggestions for the most common operating problems. If you suspect malfunction despite the absence of any diagnostic messages, follow these procedures to verify that the transmitter hardware and the sensor module are in good working order.
Rosemount 928 troubleshooting
Electronics Failure
An electronics error that could impact the device measurement reading has occurred.
Recommended actions
1. Reset the device by removing and reinstalling the power module.
2. In AMS or Field Communicator, go to Service Tools → Maintenance → Reset/
Restore → Restore Default Settings to reset the device to default settings.
3. In AMS or Field Communicator, go to Service Tools → Maintenance → Reset/
Restore → Device Reset to reset the device electronics.
4. Reconfirm all configuration items in the device.
5. If the condition persists, replace the transmitter.
Radio Failure
The wireless radio has detected a failure or stopped communicating.
Recommended actions
1. Reset the device by removing and reinstalling the power module.
2. If the condition persists, replace the transmitter.
Capacity Denied
The device has failed to acquire the wireless communication bandwidth required for the configured update rate.
Recommended actions
1. Obtaining bandwidth may take time, depending on the configured update rate and other devices on the wireless network. Wait several minutes to allow the device to obtain bandwidth on its own.
2. The update rate for the transmitter may be too frequent to allow it to join a wireless gateway that is near capacity. Reconfigure the update rate of the device or other
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6.2.5
6.2.6
6.2.7
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00809-0100-4928 devices on the wireless gateway to a less frequent update rate or increase network capacity by adding wireless gateways.
Supply Voltage Failure
The supply voltage is too low for the device to broadcast updates.
Recommended action
Replace the power module.
Sensor has Exceeded Limits
The sensor has exceeded its maximum measurement range.
WARNING
Always respond to all indications of dangerous concentrations of toxic gas as though they are real until they are proven false.
Recommended actions
1. Verify gas type and range.
2. Verify that the correct sensor is installed for the gas type.
3. Reconfirm sensor configuration.
4. Reset the device by removing and reinstalling the power module.
5. Replace the sensor module.
Sensor Module Temperature Exceeded
The gas sensor module's temperature has exceeded the sensor's maximum safe operating range.
Recommended actions
1. Verify that the environmental temperature is within the sensor's range.
2. If possible, mount the transmitter in an area with suitable environmental
conditions. Refer to Table 3-1
.
3. Reset the device by removing and reinstalling the power module.
4. If the condition persists, replace the sensor module.
Supply Voltage Low
The supply voltage is low and may soon affect broadcast updates.
Recommended action
Replace the power module.
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6.2.8
6.2.9
6.2.10
6.2.11
Rosemount 928
Database Storage Error
The device has failed to write to the database memory. Any data written during this time may have been lost.
Recommended actions
1. Reset the device by removing and reinstalling the power module.
2. If logging dynamic data is not needed, the advisory can be safely ignored.
3. If the condition persists, replace the transmitter.
Invalid Configuration
The device has detected a configuration error based on a user change to the device.
Recommended actions
1. In Field Communicator or AMS Wireless Configurator, go to Service Tools → Active
Alerts for more information.
2. Correct the parameter that has a configuration error.
3. Reset the device by removing and reinstalling the power module.
4. If the condition persists, replace the transmitter.
HI-HI Alarm
The primary variable has surpassed the user-defined limit.
WARNING
Always respond to all indications of dangerous concentrations of toxic gas as though they are real until they are proven false.
Recommended actions
1. Verify the process variable is within user specified limits.
2. Reconfirm the user-defined alarm limit.
3. If not needed, disable this alert.
HI Alarm
The primary variable has surpassed the user-defined limit.
WARNING
Always respond to all indications of dangerous concentrations of toxic gas as though they are real until they are proven false.
Recommended actions
1. Verify the process variable is within user specified limits.
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6.2.13
6.2.14
6.2.15
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2. Reconfirm the user-defined alarm limit.
3. If not needed, disable this alert.
LO Alarm
The primary variable has surpassed the user-defined limit.
WARNING
Always respond to all indications of dangerous concentrations of toxic gas as though they are real until they are proven false.
Recommended actions
1. Verify the process variable is within user specified limits.
2. Reconfirm the user-defined alarm limit.
3. If not needed, disable this alert.
LO-LO Alarm
The primary variable has surpassed the user-defined limit.
WARNING
Always respond to all indications of dangerous concentrations of toxic gas as though they are real until they are proven false.
Recommended actions
1. Verify the process variable is within user specified limits.
2. Reconfirm the user-defined alarm limit.
3. If not needed, disable this alert.
Button Stuck
A button on the electronics board is detected as stuck in the active position.
Recommended actions
1. Check the buttons for obstructions.
2. Reset the device by removing and reinstallng the power module.
3. If condition persists, replace the transmitter.
URV/LRV Out of Limits
The percentage values are beyond the allowed limits.
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6.2.17
6.2.18
6.2.19
Troubleshooting
December 2019
WARNING
Always respond to all indications of dangerous concentrations of toxic gas as though they are real until they are proven false.
Recommended actions
1. Verify gas type and range.
2. Verify that the correct sensor is installed for the gas type and range.
3. Reconfirm sensor configuration.
4. Reset the device by removing and reinstalling the power module.
5. Replace the sensor module.
Gas Alarm Threshold Configuration Invalid
One of several user alert configurations is invalid.
Recommended actions
1. Check gas alarm threshold configuration is intact.
2. Verify that the correct sensor is installed for the gas type and range.
User Alert Configurations Invalid
One of several user alert configurations is invalid.
Recommended action
Verify the user alert configuration; reconfigure as required.
Configuration Warning
The device has detected an error in its configuration settings.
Recommended actions
1. Check all configuration settings to verify validity.
2. Reconfigure the invalid configuration settings.
Sensor Module Fault
The gas sensor module is reporting a memory error.
Recommended actions
1. Remove and reinstall the gas sensor module.
2. If the condition persists, replace the sensor module.
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6.2.20
6.2.21
6.2.22
6.2.23
6.2.24
Sensor Module Disconnected
Communication with the gas sensor module has failed.
Recommended action
Verify that the module is securely connected to the transmitter.
Sensor Module Incompatible
The attached gas sensor module is a type or revision incompatible with the Rosemount
928.
Recommended action
Verify that the module is the correct type or replace the transmitter with a transmitter compatible with the Rosemount 628 Universal Gas Sensor.
Local Alarm Output Active
The measured gas concentration level was or is above the specified alarm threshold. If so equipped, the local alarm has also been activated.
WARNING
Always respond to all indications of dangerous concentrations of toxic gas as though they are real until they are proven false.
Recommended actions
1. If alarm latching is enabled and the gas concentration level has returned to a level that matches the intended application, reset the alarm latch to clear this alert.
2. Adjust the local alarm limit to match the intended application.
Sensor Module Service Overdue
A bump test or calibration has not been performed for the gas sensor module for longer than the configured reminder date or required service interval.
Recommended actions
1. Perform the overdue service as soon as possible.
2. Set the service reminder date for the next service interval.
3. Disable the service reminder if it is no longer needed.
Sensor Depleted
The sensor module is depleted and can no longer measure gas concentration levels. A sensor that cannot accept a new calibration may have reached the end of its service life.
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6.2.26
6.2.27
6.2.28
Troubleshooting
December 2019
Recommended action
Replace the gas sensor module immediately.
Replace Sensor Module Soon
The sensor module is nearing the end of its service life. A sensor that cannot accept a new calibration may have reached the end of its service life.
Recommended action
Replace the sensor module within the next service interval.
Module Type Changed
The installed gas sensor module was replaced, but it is different from the type or range previously configured.
Recommended actions
1. If the intention was to replace the gas sensor module with the same type and range, replace the gas sensor with the same Rosemount 628 Universal Gas Sensor type and range used previously.
2. If the intention was to measure a different gas type or range, verify that the gas concentration alarm thresholds are correct for the new gas type.
a) After confirming the thresholds, acknowledge the condition to clear the error.
b) Perform sensor configuration and calibration.
Refer to
.
Simulation Active
The device is in simulation mode and may not be reporting actual information.
Recommended actions
1. Verify that the simulation is no longer required.
2. In Service Tools , disable Simulation mode.
3. Reset the device.
Refer to Reset or restore device settings .
Discrete Variable Simulation Active
The device is in simulation mode and may not be reporting actual information.
Recommended actions
1. Verify simulation is no longer required.
2. In Service Tools , disable Simulation mode.
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6.4
6.4.1
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3. Reset the device. Refer to
Reset or restore device settings
.
Digital concentration output is not reacting to presence of target gas
Potential cause
Clogged IP filter
Recommended action
Check whether the IP filter is clogged; replace if necessary.
Refer to
Replace the Ingress Protection filter .
Potential cause
Gas sensor module is at the end of its service life.
Recommended action
Replace with a new module.
LCD display troubleshooting
LCD display is not operating
Potential cause
LCD display is not enabled.
Recommended action
Make sure the LCD display is enabled.
Potential cause
Connector is missing or invalid.
Recommended action
Make sure the LCD display pins are present and not bent.
Potential cause
LCD display is not fully connected.
Recommended action
Make sure the LCD display is properly seated with the tabs snapped in place and fully engaged.
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6.5
6.5.1
6.5.2
6.5.3
Troubleshooting
December 2019
Wireless network troubleshooting
Device not joining the network
Recommended actions
1. Verify network ID and join key.
2. Verify network is in active network advertise.
3. Wait longer (30 minutes).
4. Check power module.
5. Verify device is in range of at least one other device.
6. Power cycle device to try again.
7. Verify that the device is configured to join. Ensure that the Join mode is configured to Join on Power-up or Reset.
8. Refer to the troubleshooting section of your wireless gateway manual for more information.
Short power module life
Recommended actions
1. Check that Power Always On mode is off.
2. Verify device is not installed in extreme temperatures.
3. Verify device is not a network pinch point.
4. Check for excessive network rejoins due to poor connectivity.
Limited bandwidth error
Recommended actions
1. Reduce the update rate on transmitter.
2. Increase communication paths by adding more wireless points.
3. Check that the device has not been online for at least an hour.
4. Check that the device is not routing through a limited routing node.
5. Create a new network with an additional wireless gateway.
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A.1
A.1.1
Specifications and reference data
December 2019
Specifications and reference data
Specifications
Functional specifications
Discrete output, Rosemount 928XSS01, 928XUT01
Maximum rating: 28 Vdc, 100 mA
On resistance: typical 1 Ohm
Wireless output
IEC 62591 ( Wireless HART ® ) compliant, 2.4 GHz
Antenna radio frequency power output
External (WK option) antenna: Maximum of 10 mW (10 dBm) EIRP
Extended range, external (WM option) antenna: Maximum of 18 mW (12.5 dBm) EIRP
High gain, remote (WN option) antenna: Maximum of 40 mW (16 dBm) EIRP
Remote, extended (WJ option) antenna: Maximum of 18 mW (12.5 dBm) EIRP
Local display
The integral LCD display can display alert state and diagnostic information. Configurable to display updates at each wireless update.
Humidity limits
Maximum inputs for the Rosemount 928 (ordinary and IS environments)
28 Volts
95 milliamps
650 milliwatts
Wireless update rate
User selectable, 1 second to 60 minutes
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A.1.2
Physical specifications
Environmental
Operating temperature: -40 to +140 °F (-40 to +60 °C)
Ingress protection: IP66 ingress protection (IP) filter
High performance monitoring
Table A-1: Monitoring Ranges by Gas
Gas Range Accuracy T20 T50 T90
H
2
S 0-100 ppm
< 10 seconds
< 45 seconds
Default alarm
Zero drift
10 ppm < 5% per annum
Relative humidit y
Operating temperature range
10-95% -40 to +140 °F
-40 to +60 °C
CO
O
2
0-1000 ppm
0-25% by volume
±3 ppm or
10% of reading
±6 ppm or
10% of reading
±0.5% oxygen content of supply gas
< 8 seconds
< 7 seconds
< 2 seconds
< 12 seconds
< 4 seconds
< 29 seconds
< 15 seconds
100 ppm
19.5%
< 5% per annum
10-95% -22 to +140 °F
-30 to +60 °C
< 5% per annum
5-95% -22 to +140 °F
-30 to +60 °C
Electrical connections wireless power module
Replaceable, intrinsically safe lithium-thionyl chloride power module with PBT polymer
enclosure. 5.8 years of life at one minute update rate.
Switch terminals, Rosemount 928XSS01 and 928UXT01
Screw terminals permanently fixed to terminal block
Field Communicator connections
Communication terminals
Clips permanently fixed to terminal block
Materials of construction
Enclosure:
• Housing: low-copper aluminum or stainless steel
• Paint: polyurethane
• Cover O-ring: Buna-N
(2) Reference conditions are 70 °F (21 °C) and routing data for three additional network devices.
Note
Continuous exposure to ambient temperature limits (less than -40 °F or greater than 122 °F [less than -40 °C or greater than 50 °C]) may reduce specified power module life by less than 20 percent.
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A.1.3
Specifications and reference data
December 2019
Terminal block and power module pack: PBT
Antenna: PBT/PC integrated omnidirectional antenna
Conduit entries: ½ -14 national pipe thread (NPT)
Rosemount 928 weight
Low-copper aluminum housing (2A ordering option): 73 ounces (2076 grams)
Stainless steel housing (2S ordering option): 143 ounces (4055 grams)
Enclosure ratings
NEMA ® 4X and IP66
Performance specifications
Electromagnetic compatibility (EMC)
All models: meet all relevant requirements of EN-61326-2-3: 2006
Vibration effect
Wireless output unaffected when tested according to the requirements of IEC60770-1 field or pipeline with high vibration level (10-60 Hz 0.2 mm displacement peak amplitude/
60-2000 Hz 3g).
Wireless output unaffected when tested according to the requirements of IEC60770-1 field with general application or pipeline with low vibration level (10-60 Hz 0.15 mm displacement peak amplitude/60-500 Hz 2g).
Temperature guidelines
Sensor type Operating limit
H
2
S
O
2
CO
-40 to 140 °F
-40 to 60 °C
-22 to 140 °F
-30 to 60 °C
-22 to 140 °F
-30 to 60 °C
Transmitter storage limit
-40 to 185 °F
-40 to 80 °C
-40 to 185 °F
-40 to 80 °C
-40 to 185 °F
-40 to 80 °C
Sensor storage recommendation
34 to 45 °F
1 to 7 °C
34 to 45 °F
1 to 7 °C
34 to 45 °F
1 to 7 °C
Note
The electrochemical cells in sensor modules have a limited shelf life. Store sensor modules in a cool location that is not excessively humid or dry. Storing sensor modules for long periods may shorten their useful service life.
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Specifications and reference data
December 2019
A.2
Dimensional drawings
Figure A-1: Rosemount 928
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180
Dimensions are in inches [millimeters].
Emerson.com/Rosemount
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Figure A-2: Rosemount 928 Mounting Configurations
Specifications and reference data
December 2019
Dimensions are in inches [millimeters].
A. 2-in. bolt for pipe mounting (clamp shown)
B.
¼ -in. x ¼ -in. bolts for transmitter mounting
A.3
Ordering information
Typical model number: 928 X SS 00 2A I5 WA3 WK1 B4
CONFIGURE > VIEW PRODUCT >
A.3.1
Standard options
The starred offerings ( ★ ) represent the most common options and should be selected for best delivery. The non-starred offerings are subject to additional delivery lead time.
Product description
Code Description
928 Wireless Gas Monitor ★
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Code Description
X Wireless
Transmitter output
Sensor options
Code Description
SS Sensor specified separately and shipped with the transmitter (requires specification of the Rosemount
628)
UT Universal transmitter (no sensor specified)
Discrete output
Code Description
00 No discrete output; wireless communication only
01 Discrete output and wireless communication
Housing material
Code Description
2A Aluminum ½ -14 national pipe thread (NPT) conduit
2S Stainless steel ½ -14 NPT conduit
Product certifications
I1
I3
I7
KQ
NA
I6
I4
Code Description
I5 USA Intrinsically Safe
Canada Intrinsically Safe
Japan Intrinsic Safety
ATEX Intrinsic Safety
China Intrinsic Safety
IECEx Intrinsic Safety
USA CSA ATEX Intrinsic Safety
No approvals
A.3.2
★
Wireless options
The starred offerings ( ★ ) represent the most common options and should be selected for best delivery. The non-starred offerings are subject to additional delivery lead time.
★
★
★
★
★
★
★
★
★
★
★
★
★
★
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Wireless update range, operating frequency, and protocol
Code Description
WA3 User configurable update rate, 2.4 GHz DSSS, IEC 65291 ( Wireless HART ® ) ★
Omnidirectional wireless antenna and SmartPower
™
solutions
Code Description
WK1 External antenna, adapter for black power module (I.S. power module sold separately)
WM1 Extended range, external antenna
WJ1 Remote antenna, adapter for black power module (I.S. power module sold separately)
WN1 High-gain remote antenna, adapter for balck power module (I.S. power module sold separately)
★
★
★
★
A.3.3
Other options
The starred offerings ( ★ ) represent the most common options and should be selected for best delivery. The non-starred offerings are subject to additional delivery lead time.
Mounting bracket
Code Description
B4 Universal L mounting bracket for 2-in. (50.8 mm) pipe mounting, stainless steel brackets, and bolts
Configuration
Code Description
C1 Factory configuration date, descriptor, message fields, and wireless parameters
Quality documentation
Code Description
Q1 Certificate of Compliance
★
★
★
A.3.4
Rosemount 628 Universal Gas Sensor ordering information
The starred offerings ( ★ ) represent the most common options and should be selected for best delivery. The non-starred offerings are subject to additional delivery lead time.
Typical model number: 628 EC TO2 2 F
CONFIGURE > VIEW PRODUCT >
Rosemount 928 183
Specifications and reference data
December 2019
Product description
Code Description
628 Universal Gas Sensor
Sensor technology
Code Description
EC Electrochemical
Gas type
Code Description
T02 Hydrogen sulfide
A03
T04
Oxygen
Carbon monoxide
Unit of measurement
Code Description
2 ppm
3 % by volume
Sensor range
Code Description
F
D
K
0-100 (for H
2
S only)
0-25 (for O
2
only)
0-1000 (for CO only)
A.3.5
Spare parts
Description
Ingress Protection (IP) filter
Spare B4 mounting bracket for Rosemount 928
Part number
00628-9000-0001
03151-9270-0004
Reference Manual
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★
★
★
★
★
★
★
★
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B.1
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B.2
B.3
B.4
B.5
B.6
Product certifications
December 2019
Product certifications
Rev 3.3
European Directive information
The most recent revision of the EC Declaration of Conformity can be found at www.Emerson.com/Rosemount under Documentation .
Telecommunication compliance
All wireless devices require certification to ensure that they adhere to regulations regarding the use of the RF spectrum. Nearly every country requires this type of product certification. Emerson is working with governmental agencies around the world to supply fully compliant products and remove the risk of violating country directives or laws governing wireless device usage.
FCC and IC
This device complies with Part 15 of the FCC rules. Operation is subject to the following conditions: This device may not cause harmful interference. This device must accept any interference received, including interference that may cause undesired operation. This device must be installed to ensure a minimum antenna separation distance of 7.81 in. (20 cm) from all persons.
Ordinary location certification
As standard, the transmitter has been examined and tested to determine that the design meets basic electrical, mechanical, and fire protection requirements by a nationally recognized testing laboratory (NRTL) as accredited by the Federal Occupational Safety and
Health Administration (OSHA).
Installing in North America
The US National Electrical Code ® (NEC) and the Canadian Electrical Code (CEC) permit the use of Division-marked equipment in Zones and Zone-marked equipment in Divisions. The markings must be suitable for the area classification, gas, and temperature class. This information is clearly defined in the respective codes.
USA
I5 U.S.A. Intrinsically Safe (IS)
Certificate CSA 70138122
Rosemount 928 185
Product certifications
December 2019
B.7
186
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Standards FM 3600–2011, FM 3610–2010, UL Standard 50—11th edition, UL 61010–1
—3rd edition, ANSI/ISA–60079–0 (12.00.01)–2013, ANSI/ISA–60079–11
(12.02.01)–2014
Markings IS CL I, DIV 1, GP A, B, C, D T4 Ex ia IIC T4 Ga;
T4 (-40 °C ≤ Ta ≤ +50 °C) when installed according to Rosemount drawing
00928-1010;
Class 1, Zone 0, AEx ia IIC T4 Ga;
Type 4X
Table B-1: Entity Parameters
Input (power) parameters
Ui - 28 Vdc
Ii - 93.3 mA
Pi - 653 mW
Ci - 5.72 nF
Li - 0
Output (alarm) parameters
Uo - 28 Vdc
Io -93.3 mA
Po - 653 mW
Co - 77 nF
Lo - 2 mH
Table B-2: HART ® Comm Parameters
Uo - 1.9 Vdc
Io - 32 µA
Special Conditions for Safe Use (X):
1. For use only with the Emerson Model 701PBKKF, the Computation Systems, Inc.
MHM-89004, or the Perpetuum Ltd. IPM71008/IPM74001.
2. The surface resistivity of the antenna is greater than 1 GΩ. To avoid electrostatic discharge buildup, it must not be rubbed or cleaned with solvents or dry cloth.
3. Substitution of components may impair Intrinsic Safety.
Canada
I6 Canada Intrinsically Safe (IS)
Certificate CSA 70138122
Standards CAN/CSA C22 No. 0–10, CAN/CSA C22.2 No. 94.2-15, CAN/CSA-60079-0–
2015, CAN/CSA-60079-11–2014, CAN/CSA-C22.2 61010-1–2012
Markings IS CL I, DIV 1, GP A, B, C, D T4;
Ex ia IIC T4 Ga;
T4 (-40 °C ≤ Ta ≤ +50 °C) when installed according to Rosemount drawing
00928-1010;
Type 4X
Refer to
Emerson.com/Rosemount
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B.8
Product certifications
December 2019
Special Conditions for Safe Use (X):
1. For use only with the Emerson Model 701PBKKF, the Computations Systems, Inc.
MHM-89004, or the Perpetuum Ltd. IPM71008/IPM74001.
Pour utilization uniquement avec Emerson Model 701PBKKF, Computation Systems, Inc
MHM-89004, ou Perpetuum Ltd. IPM71008/IPM74001.
2. The surface resistivity of the antenna is greater than 1 GΩ. To avoid electrostatic discharge buildup, it must not be rubbed or cleaned with solvents or a dry cloth.
La résistivité de surface du bo ȋ tier est supérieure à un gigaohm. Pour éviter l’accumulation de charge électrostatique, ne pas frotter ou nettoyer avec des produits solvants ou un chiffon sec.
3. Substitution of components may impair Intrinsic Safety.
La substitution de composants peut compromettre la sécurité intrinsèque.
Europe
I1 ATEX Intrinsically Safe (IS)
Certificate
Standards
Markings
Sira17ATEX2371X
EN 60079-0:2012 + A11:2013, EN 60079-11:2012
II1 G
Ex ia IIC T4 Ga;
T4 (-40 °C ≤ Ta ≤ +50 °C)
Type IP66
Refer to
Special Conditions for Safe Use (X):
1. Under certain extreme circumstances, the non-metallic parts incorporated in the enclosure of this equipment may generate an ignition capable of electrostatic charge. Therefore, the equipment shall not be installed in a location where the external conditions are conducive to the build-up of electrostatic charge on such surfaces. In addition, the equipment shall only be cleaned with a damp cloth.
2. The transmitter may contain more than 10 percent aluminum and is considered a potential risk ignition by impact or friction. Care must be taken into account during installation and use to prevent impact or friction.
3. The equipment shall be powered by Emerson 701PBKKF. An alternative power source shall be the CSI MHM-89004, as these devices have output parameters that are equal or less onerous than the parameters of the 701PBKKF.
4. Only the 375, 475, or AMS Trex Communicators may be used with the Rosemount
928.
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B.9
B.10
B.11
188
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International
I7 IECEx Intrinsically Safe (IS)
Certificate
Standards
Markings
IECEx SIR 17.0091X
IEC 60079-0:2011, IEC 60079-11:2011
Ex ia IIC T4 Ga;
T4 (-40 °C ≤ Ta ≤ +50 °C)
Type IP66
Refer to
Special Conditions for Safe Use (X):
1. Under extreme circumstances, the non-metallic parts incorporated in the enclosure of this equipment may generate an ignition-capable level of electrostatic charge.
Therefore, the equipment shall not be installed in a location where the external conditions are conducive to the build-up of electrostatic charge on such surfaces. In addition, the equipment shall only be cleaned with a damp cloth.
2. The transmitter may contain more than 10 percent aluminum and is considered a potential risk ignition by impact or friction. Care must be taken into account during installation and use to prevent impact or friction.
3. The equipment shall be powered by Emerson 701PBKKF. An alternative power source shall be the the CSI MHM-89004, as these devices have output parameters that are equal or less onerous than the parameters of the 701PBKKF.
4. Only the 375, 475, or AMS Trex Communicators may be used with the Rosemount
928.
China
I3 NEPSI Intrinsically Safe (IS)
Certificate
Standards
Markings
GYJ18.1438X
GB 3836.1-2010, GB 3836.4-2010, GB 3836.20-2010
Ex ia IIC T4 Ga (Ta= -40 °C to +50 °C)
Special Conditions for Safe Use (X):
See certificate.
Japan
CML Intrinsically Safe (IS)
Certificate
Standards
CML 18JPN2345X
IEC 60079-0:2011, IEC 60079-11:2011
Emerson.com/Rosemount
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Product certifications
December 2019
Markings Ex ia IIC T4 Ga;
T4 (-40 °C ≤ Ta ≤ +50 °C)
Special Conditions for Safe Use (X):
See certificate.
Brazil
IM INMETRO Intrinsically Safe
Certificate UL-BR 19.0096X
Standards ABNT NBR IEC 60079-0:2013, ABNT NBR IEC 60079-11:2013
Markings Ex ia IIC T4 Ga;
T4 (-40°C ≤ Ta ≤ +50°C)
Special Conditions for Safe Use (X):
See certificate.
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B.13
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Intrinsically Safe installation drawing
Figure B-1: Rosemount 928 Wireless Gas Monitor Intrinisically Safe Installation
Drawing
190 Emerson.com/Rosemount
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C
C.1
C.2
C.2.1
C.2.2
C.2.3
High gain remote antenna option
December 2019
High gain remote antenna option
Safety messages
Procedures and instructions in this section may require special precautions to ensure the safety of the personnel performing the operation.
WARNING
When installing remote mount antennas for the wireless field device, always use established safety procedures to avoid falling or contact with high-power electrical lines.
Install remote antenna components for the transmitter in compliance with local and national electrical codes and use best practices for lightning protection.
Before installing, consult with the local area electrical inspector, electrical officer, and work area supervisor.
The wireless field device remote antenna option is specifically engineered to provide installation flexibility while optimizing wireless performance and local spectrum approvals.
To maintain wireless performance and avoid non-compliance with spectrum regulations, do not change the length of cable or the antenna type.
If the supplied remote mount antenna kit is not installed per these instructions,
Emerson is not responsible for wireless performance or non-compliance with spectrum regulations.
Be aware of overhead electrical power lines.
Antenna functional specifications
Output
Wireless HART ® 2.4 GHz DSSS (direct sequence spread spectrum).
Radio frequency power output from antenna:
• High gain remote (WN option) antennal: maximum of 40 mW (16 dBm) EIRP
(equivalent isotropically radiated power)
Communications range
⅔ mile (3,300 ft.)(1.0 km) with L.O.S.
Coaxial length
25 ft. (7.6 m) with type N connections
Rosemount 928 191
C.2.8
C.2.9
C.3
C.3.1
High gain remote antenna option
December 2019
C.2.4
C.2.5
C.2.6
C.2.7
Reference Manual
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Coaxial material
• Heavy duty, low loss LMR400 cable
• Minimum coaxial bend diameter 1.0 ft. (3.0 m)
Antenna
• Remote-mount omni directional antenna
• Fiberglass and aluminum construction
• 8 Db Gain
• Meets MIL-STD-810G (method 510.5, procedure I and II)
Physical specifications
Weight: 1.0 lb. (0.4 kg)
RF lightning arrestor
In-line lightning arrestor
Electrical connection: lightning arrestor MUST be grounded per local electrical codes and regulations.
Mounting bracket
• Horizontal or vertical mast accommodation
• Supported mast diameter: 1.0 to 2.5 in. (2.5 to 6.4 cm)
• Aluminum bracket
• Nickel/zinc plated mounting U-bolts
Ratings
NEMA ® 4X and IP66/67
Vibration
3 g maximum vibration
Installation considerations
Antenna mounting
Mount antenna vertically (±5°).
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C.3.2
C.3.3
C.3.4
High gain remote antenna option
December 2019
Antenna height
Mount antenna 14 ft. (4.3 m) above infrastructure with clear line of sight.
Coaxial cable
Ensure that coaxial cable is securely affixed to the mast to avoid excessive cable movement.
Install coaxial drip loop
Ensure a drip loop is installed not closer than 1 ft. (0.3 m) from the transmitter. It may also be convenient to affix the drip loop to the lower portion of the mast ensuring that condensation or rainwater will flow away from the coaxial connections.
Figure C-1: Coaxial Drip Loop
A
C.3.5
C.4
C.4.1
C.4.2
A. Coaxial drip loop
Apply coaxial sealant moisture protection
Use the coaxial sealant included in the high gain remote mounting kit package. Follow the included instructions for application on the coaxial connection.
Transient and lightning considerations
Wireless gateway transient protection
When installing the antenna, consider using transient and lightning protection (customersupplied) on Ethernet, Modbus ® , and coaxial interface to other equipment.
RF lightning arrestor ground connection
Ensure that a grounding connection is made on the RF lightning arrestor ground connection point.
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High gain remote antenna option
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C.5
Dimensional drawing
Figure C-2: Device Connection and RF Lightning Arrestor
Reference Manual
00809-0100-4928 n `
.53
[X] 2.75
4 PLS
A
20.2-ft.
[513m] n n
B
C
D
E
A. Antenna
B. Mounting bracket
C. Mounting arrestor
D. 25 ft. (7.5 m) cable
E. Min drip loop Ø12-in. (0.3 m)
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High gain remote antenna option
December 2019
Install the high gain remote antenna
Complete the following steps to install the high gain remote antenna on the transmitter.
Procedure
1. Mount the transmitter.
Refer to Install the transmitter
.
Figure C-3: High Gain Remote Antenna
A
A. RF lightning protector
2. Connect the RF lightning protector to the device and tighten.
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High gain remote antenna option
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3. Connect antenna to mounting bracket and tighten nut carefully.
Reference Manual
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4. Unwind the coaxial cable and connect the cable to both the antenna and the lightning protector connected to the transmitter, leaving one loop minimum for a drip loop. Ensure that the drip loop is lower than the device to allow water to flow away from the device.
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5. Apply the coaxial sealant around each of the coaxial connections and the lightning arrestor. Verify that the RF connections are completely sealed.
Rosemount 928
6. Attach the U-bolts to the mounting bracket to position the antenna vertically.
7. Verify that the antenna is positioned vertically. Tighten the U-bolts to the mast.
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D
D.1
D.2
Alert message mapping
December 2019
Alert message mapping
This appendix outlines the most important alerts in the HART ® command 48 Additional
Status field for the Rosemount 928. The information in this section can be used by DeltaV ™ for alert monitoring and in the Wireless Gateway for Additional Status mapping in
Modbus ® , OPC, and other communication protocols. A complete list of Additional Status bits is available in the wireless gateway.
Variable mapping contains the device variable and variable mapping indexes for the
transmitter.
contains the most important alert messages that may be displayed in the
AMS Device Manager and Field Communication together with the location of the alert in the HART command 48 Additional Status field.
To view active alerts in Field Communicator or AMS Device Manager, from the Home screen, go to Service Tools → Active Alerts .
Variable mapping
Table D-1: Device Variable Index
1
2
Device variable
0
3
Index
Supply voltage
Electronics temperature
Gas concentration
Sensor temperature
Table D-2: Device Variable Mapping Index (Cannot be Modified)
Variables
PV
SV
TV
QV
Index
Gas concentration
Sensor module temperature
Electronics temperature
Supply voltage
Alert mapping
Table D-3: Failure Alerts (F)
Message
Electronics Failure
Byte 8 :: Bit 6
Description
A failure has been detected in the device memory, electronics, or both.
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Table D-3: Failure Alerts (F) (continued)
Message
Invalid Configuration
Radio Failure
Supply Voltage Failure
Sensor Module Fault
Byte 2 :: Bit 6
Byte 12 :: Bit 4
Byte 6 :: Bit 2
Byte 3 :: Bit 7
Sensor Module Disconnected Byte 3 :: Bit 6
Sensor Module Incompatible Byte 3 :: Bit 5
Sensor Depleted Byte 3 :: Bit 1
(1) Location of the alert in the HART ® command 48 Status field.
Table D-4: Maintenance Alerts (M)
Message
Button Stuck
Byte 1 :: Bit 5
Sensor Module Service Overdue Byte 3 :: Bit 2
Replace Sensor Module Soon Byte 3 :: Bit 0
Sensor Module Temperature
Exceeded
Electronics Temperature
Beyond Limits
Supply Voltage Low
Byte 4 :: Bit 6
Byte 8 :: Bit 5
Byte 8 :: Bit 4
Description
The device has detected a configuration error based on a change to the device.
The wireless radio has detected a failure or has stopped communicating.
The supply voltage is too low for the device to broadcast updates.
The sensor module has detected an internal electronics failure.
Communications with the sensor module have failed.
The sensor module is a type or revision that is not compatible with the transmitter.
The gas concentration level cannot be measured.
Description
A button on the electronics board is stuck in the active position.
The sensor module has not been serviced for longer than the configured reminder date or required service interval.
The sensor module has been in operation for longer than the recommended duration.
The sensor module temperature has exceeded its safe operating range.
The transmitter electronics temperature has exceeded its safe operating range.
The supply voltage is low and may soon affect broadcast updates.
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Alert message mapping
December 2019
Table D-4: Maintenance Alerts (M) (continued)
Message
Capacity Denied
Byte 12 :: Bit 0
Description
The device has failed to acquire the wireless communication bandwidth required for the configured update rate.
(1) Location of the alert in the HART command 48 Status field
Table D-5: Advisory Alerts (A)
Message
Database Storage Error
Configuration Warning
Sensor has Exceeded Limits
Local Alarm Output Active
Module Type Change
Byte 0 :: Bit 2
Byte 2 :: Bit 1
Byte 3 :: Bit 4
Byte 3 :: Bit 3
Byte 4 :: Bit 5
HI-HI Alarm
HI Alarm
LO Alarm
LO-LO Alarm
Simulation Active
Byte 5 :: Bit 4
Byte 5 :: Bit 5
Byte 5 :: Bit 6
Byte 5 :: Bit 7
Byte 8 :: Bit 0
(1) Location of the alert in the HART command 48 Status field.
Description
The device has failed to write to the database memory. Any data written during this time may have been lost.
A user configuration is corrupt and has reverted to a default value.
The measured gas concentration level is beyond the range supported by the gas sensor.
The gas concentration measured by this device has exceeded the local alarm limit.
The local alarm output (if equipped) is now active.
The installed gas sensor module was replaced, but is different from the type or range previously configured.
A device variable value has surpassed the user-defined limit.
A device variable value has surpassed the user-defined limit.
A device variable value has surpassed the user-defined limit.
A device variable value has surpassed the user-defined limit.
The device is in simulation mode and may not be reporting actual information.
Rosemount 928 201
00809-0100-4928
Rev. AF
2019
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