SCR Retrofit Aftertreatment General Information Caterpillar

General Information

SCR Retrofit Aftertreatment [UENR4332]

SCR Retrofit Aftertreatment Aftertreatment SCR System Verification - Test

ENGINE ARRANGEMENT

SCR Retrofit Aftertreatment General Information

1.1. Systems Operation

2.2. SCR Systems Diagram

3.2. Reactor Housing Operation

4.3. Diesel Oxidation Catalyst Operation

5.3. Diesel Particulate Filter Operation

6.2. Selective Catalytic Reduction Substrate Block

7.2. Air and DEF Flow Schematic

8.2. Dosing Cabinet Exploded View

9.3. Dosing Pump Operation

10.3. Touch Monitor Operation

11.3. Storage and Literature

12.2. LED Operation

13.2. Modes of Operation for the 450-6116 Software (Retrofit Selective Catalytic Reduction Land Software)

14.2. Webpage Interface for the 450-6116 Software (Retrofit Selective Catalytic Reduction Land Software)

15.3. Operation Page

16.3. Status Page

17.3. About Page

18.3. Setup Page

19.3. Closed Loop Tuning Page

20.3. Open Loop Tuning Page

21.3. Configuration Page

22.2. Modes of Operation for the 450-6117 Software (Retrofit Selective Catalytic Reduction Marine Software)

23.2. Webpage Interface for the 450-6117 Software (Retrofit Selective Catalytic Reduction Marine Software)

24.3. Operation Page

25.3. Status Page

26.3. About Page

27.3. Setup Page

28.3. Heater Configuration Page

29.3. Closed Loop Tuning Page

30.3. Open Loop Tuning Page

31.3. Configuration Page

32.2. Modes of Operation for the 450-6118 Software (Retrofit Selective Catalytic Reduction Open Loop Software)

33.2. Webpage Interface for the 450-6118 Software (Retrofit Selective Catalytic Reduction Open Loop Software)

34.3. Operation Page

35.3. Status Page

36.3. About Page

37.3. Setup Page

38.3. Open Loop Tuning Page

39.3. Configuration Page

40.2. Modes of Operation for the 450-7654 Software (Retrofit Selective Catalytic Reduction Software)

41.2. Webpage Interface for the 450-7654 Software

42.3. Operation Page

43.3. System Setup Page

44.3. Dosing Map Setup Page

45.3. Closed Loop Setup Page

46.3. Heater Setup Page

47.3. Network System Setup Page

48.2. MODBUS Addresses

The Retrofit Selective Catalytic Reduction (SCR) System includes the following components: Diesel Oxidation Catalyst (DOC) or a Diesel Particulate Filter (DPF), Selective Catalytic Reduction (SCR) catalyst, Pre/Post Nitrogen Oxide (NO_x) sensors, mixing section and a Dosing Cabinet.

Engine exhaust flows into the Retrofit SCR System reactor housing through the exhaust inlet. Exhaust flows through the DOC or DPF. Diesel Exhaust Fluid (DEF) is injected into exhaust by the Lance as the DEF atomizes through the nozzle due to high-pressure air. The atomized DEF is injected into the exhaust flow prior to a series of mixing fans. This creates a uniform mixture and consistent disbursement across the SCR Catalyst sections.

Precise DEF injection is controlled through the SCR Controller, by monitoring inputs from the sensors installed in the engine and SCR System. The inputs include: a pre-pressure sensor located in the inlet manifold, a thermocouple located in the reactor housing, a Pre NO_x sensor installed in the inlet to the reactor and a post NO_x sensor in the exhaust out. Each sensor provides an input to the SCR Controller to control DEF injection for NO_x reduction.

Three main components of the Retrofit SCR system:

1. The Retrofit SCR system reactor is constructed of stainless steel. The SCR reactor is a double walled unit that houses the appropriate components to meet sites-specific requirements.

2. The dosing cabinet contains a controller, DEF dosing system, and an air regulation system. A heated Tube Wire Bundle (TWB) transports DEF and air from the dosing cabinet to the reactor. The following three sensor kits are associated with the system:

Injector kit
NO_x sensor and mounting kit
Sensor kit installation

3. The SCR controller uses one of the following software:

450-6116 Software (Retrofit Selective Catalytic Reduction Land Software)
450-6117 Software (Retrofit Selective Catalytic Reduction Marine Software)
450-6118 Software (Retrofit Selective Catalytic Reduction Open Loop Software)
450-7654 Software (Retrofit Selective Catalytic Reduction Software)

Note: The 450-7654 Software (Retrofit Selective Catalytic Reduction Software) replaces all previous versions of software.

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Illustration 1	g03670391
Typical internal view of a horizontal system

Systems Operation

SCR Systems Diagram

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Illustration 2	g03432594
SCR temperature sensor (3) can be installed into the port next to injector assembly (7) . (1) Exhaust back pressure sensor (2) Inlet NO_x sensor (3) SCR temperature sensor (4) Outlet NO_x sensor (5) Boost temperature sensor (6) Boost pressure sensor (7) Injector assembly (8) Customer supplied back pressure valve (9) TWB (10) Circulating pump (11) DEF supply ball valve (12) Compressed air supply ball valve (13) Air compressor

The standard system configuration begins DEF dosing and NO_x reduction at an exhaust temperature of 300° C (572° F) within the reactor housing. Optimal NO_x reduction occurs above 350° C (662° F). Maximum allowable exhaust temperature is 550° C (1022° F). Special configurations for different exhaust temperatures or operating conditions may be available.

Reactor Housing Operation

The reactor housing contains a NO_x sensor located on the inlet and outlet piping. These sensors communicate via CAN bus to the SCR Controller for DEF management. The values can be viewed by use of a computer interfaced with SCR Controller. Refer to Illustration 2 for the correct location of the sensors.

Control of the Open Loop (OL) SCR system requires four inputs that are external to the dosing cabinet:

Boost pressure sensor
Boost temperature sensor
Exhaust back pressure sensor
Exhaust temperature sensor

Control of the Closed Loop (CL) SCR system requires six inputs that are external to the dosing cabinet:

Boost pressure sensor
Boost temperature sensor
Exhaust back pressure sensor
Exhaust temperature sensor
Pre NO_x Sensor
Post NO_x Sensor

Diesel Oxidation Catalyst Operation

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Illustration 3	g03398644
Exhaust flow through a Diesel Oxidation Catalyst.

The DOC oxidizes hydrocarbons contained in the exhaust gas. The DOC is a flow-through device. A chemical reaction takes place that reduces the amount of hydrocarbons and carbon monoxide when the exhaust gas flows through the cells that are coated with precious metals located within the DOC.

The temperature of the exhaust is an important factor to activate the catalyst. Below 200° C (392° F) little to no catalyst activity is occurring. This means that emissions from the engine are not being reduced. As the exhaust temperature rises above 200° C (392° F), the catalyst activity increases rapidly. The catalyst begins to operate efficiently at exhaust temperatures between 280° C (536° F) and 360° C (680° F). Temperatures greater than 360° C (680° F) promote optimum efficiency. The greater temperatures will promote optimum CO + O2 = CO2 and HC+02 = H2O + CO2 conversion. PM reductions can occur due to the oxidizing of the Soluble Organic Fraction (SOF), the adsorbed liquid hydrocarbon layer, on the surface of the soot particles. The SOF may account for the nearly 20 percent PM by weight. Operation of the DOC at temperatures greater than 700° C (1292° F) is not recommended and may result in reduction of the catalyst efficiency.

Diesel Particulate Filter Operation

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Illustration 4	g03398873
Exhaust flow through a Diesel Particulate Filter.

The DPF is used to reduce greater than 85 percent of the emissions of particulate matter (soot). These emissions are reduced by filtration as the exhaust passes through the DPF wall. Carbon monoxide (CO), and Hydrocarbons (HC) are also reduced as the engine exhaust passes through the catalytic oxidation and filtration units. The DPF filter substrate uses a series of alternately blocked channels which forces exhaust gasses to flow through the channel walls. Particulates are physically captured and chemical reactions take place (see Illustration 4). Carbon monoxide and hydrocarbons are converted into carbon dioxide and water vapor. These filters are self-regenerating. Self-regenerating filters are not disposable, but, instead, will "burn off" the accumulated soot continuously if the proper exhaust temperature profile is met.

Proper DPF regeneration REQUIRES the following conditions:

Ultra Low Sulfur Diesel Fuel Must Be Used. Ultra Low Sulfur Diesel Fuel must have an average sulfur content of 15 parts per million (ppm).
Ultra Low Sulfur Diesel (ULSD) fuel (≤ 15 ppm (mg/kg) sulfur) is required by regulation for diesel engine use in California. The United States (U.S.) Environmental Protection Agency (EPA) defines Ultra Low Sulfur Diesel (ULSD - S15) as a U.S. diesel fuel with a sulfur content not to exceed 15 parts per million (ppm (mg/kg)). Also, the sulfur content in the diesel fuel is not to exceed 0.0015 percent by weight. ULSD fuel must meet the S-15 fuels designation in the latest edition of ASTM D975 and/or conform to AVSpare Fuel Specification.
Biodiesel fuel may be used up to the B20 blend level (20 percent biodiesel and 80 percent appropriate ULSD fuel). If the final B20 blend conforms to ASTM D7467 and API gravity 30-45. The neat biodiesel blend stock should conform to ASTM 6751.
The engine exhaust temperature at the DPF inlet must be 240° C (464° F) or greater for at least 40 percent of the time.
The ratio of nitrogen oxides (NO_x) to particulate matter (PM) must be a minimum of 25:1. This ratio is the NO_x level, in grams/brake horsepower hour, divided by the PM level). This technology is currently applicable to 1996 or newer Tier I or Tier 2 engines. Current AVSpare retrofit passive DPF product is not applicable to Tier 3 engines.
Consult with State and Federal agencies for verification requirements.
The engine should be maintained and must not consume oil at a rate greater than the rate specified by the engine manufacturer.
AVSpare DEO-ULS (Ultra Low Sulfur) 319-2260 Oil exceeds the performance requirements of API category CJ-4 oil and is recommended due to a low ash specification. Engine oil that meets or exceeds the specifications in the AVSpare ECF-3 or API CJ4 Categories may be used in these applications. Oil burned during the combustion process accounts for almost all of the DPF ash accumulation (because of oil additives). The use of the recommended low ash oil results in lower ash accumulation in the filter. Failure to use the recommended grade of oil may result in more frequent ash removal service intervals.

Selective Catalytic Reduction Substrate Block

The SCR catalyst which promotes the chemical reaction between the NOx and ammonia. The process converts the NOx into nitrogen and water. The catalyst material is coated onto ceramic honeycombed bricks which are bound together by (or canned with) stainless steel sheet metal. The canned sections are set in two or three layers (or stages).

The reactor may contain one of two types of SCR catalyst. One is designed for a lower temperature range of 315 to 405 °C (600 to 761 °F). The other is designed for a higher temperature range of 355 to 580 °C (671 to 1076 °F).

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NOTICE

Operating an SCR catalyst above the design maximum temperature limit will reduce the catalyst life and damage to the catalyst.

Operating the engine without dosing DEF may result in a visible exhaust plume. The plume is temporary, and will clear up when dosing begins.

Air and DEF Flow Schematic

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Illustration 5	g03398975
Air pressure is 0.28 cubic meter (10 cubic feet) per minute at 586 ± 103 kPa (85 ± 15 psi). DEF is supplied by a circulation loop at 14 ± 7 kPa (2 ± 1 psi).

Dosing Cabinet Exploded View

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Illustration 6	g03398976

The Dosing Cabinet contains components of the dosing system.

Touch monitor, located on the inside of the dosing cabinet door, displays operational values.
SCR Controller analyzes input data and controls various solenoids and pumps to achieve desired reductions.
Circuit breakers and fuses are located inside the dosing cabinet.
Dosing pump regulates dosage to the injector assembly.
Air and purge solenoids are controlled by a 24V signal from the SCR Controller to control the flow of air to the injector assembly.
Pump display shows the current flow rate.
Y-sediment strainer contains a 60 micron screen that removes debris from the DEF before the pump.
24V power supply powers the SCR Controller, fan, and touch monitor.
Air pressure regulator allows adjustment of the air used for dosing.
Dosing pump is equipped with a purge valve.
DEF back pressure valve maintains a minimum DEF system pressure to reduce the risk of flooding the reactor during engine off condition.
Air delivery pressure gauge indicates the air pressure delivered to the TWB.
DEF delivery pressure gauge indicates the DEF delivered to the TWB and displays the pressure fluctuations during dosing.
Air supply switch tells the SCR Controller when air pressure drops below 310 kPa (45 psi).
Check valve allows air and DEF flow in only one direction.
Ethernet switch connects the touch monitor, the SCR Controller, and has an open port for network connections.
Manual purge switch, toggle switch mounted on the DIN rail. Center position is OFF. Move the switch in the up or down position to initiate purge then return to the center position. Manual purge cannot be interrupted unless the system is rebooted.
DIN-Block routes wiring to designated devices.
24V fan in the cabinet moves air inside the cabinet. The fan does not cool or move fresh air, but moves the same air continuously in cabinet.

Dosing Pump Operation

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Illustration 7	g03399069
Typical dosing pump

The Dosing pump regulates the DEF dosage into the system. The pump display will show current flow rate. The pump is powered by AC current through a circuit breaker in the cabinet. The pump operates on a 4 mA to 20 mA signal from the SCR Controller that is tuned during commissioning.

Touch Monitor Operation

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Illustration 8	g03446159
(1) Touch monitor

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Illustration 9	g03445978
(2) USB port (3) Ethernet port (4) Switch for power display

The dosing cabinet is equipped with a touch monitor.

The power switch is located on the lower right-hand side of the display and is pushed upwards until the power light illuminates. When the touch monitor is turned on, click the "Start New Session" button to view the operations page.

Storage and Literature

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Illustration 10	g03399077
(1) Storage compartment

The Storage compartment is located on the inside of the dosing cabinet door.

LED Operation

A system status box on the "Operation" page displayed on the touch monitor also communicates the state of the system and the system components. Refer to "Status Page" for more information.

On the outside of the cabinet are three lights signifying system status:

1. The Power Lamp signifies there is power to the dosing cabinet and the SCR Controller is booted.

2. The DEF Lamp is used to signify whether the SCR is in Run Mode (constantly illuminated) or in Purge Mode (flashing).

3. The Fault Lamp is used to signify any faults that may be occurring in the system (flashing), or if the system is in Manual Purge Mode.

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Table 1
Power, DEF, and Fault Lights
Green ⁽¹⁾	Blue ⁽²⁾	Red ⁽³⁾	Status	Action
OFF	OFF	OFF	Controller not operating	Check power supply to the Dosing Cabinet
ON	OFF	OFF	Power on: Controller in Standby	Check the status to see if one of the operating conditions is not met
ON	ON	OFF	Run mode	Normal operating condition
ON	BLINKING	OFF	Purge mode	Check if low boost Check if low air pressure Check if low exhaust temp
ON	OFF	BLINKING	Fault	Check "Operation" screen status display for a reported fault Ensure that the air supply is 586 ± 103 kPa (85 ± 15 psi) Ensure that Manual purge switch is off Reboot system if necessary
ON	BLINKING	BLINKING	Manual purge	Turn switch off after the purge cycle has completed
ON	ON	BLINKING	Open loop mode	Check NOx sensors Replace if necessary

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^( 1 )	Green light – Power Supply/Cabinet is powered on and controller is booted
^( 2 )	Blue light – DEF Dosing is present
^( 3 )	Red light – System has been placed into manual purge or a fault is present

Modes of Operation for the 450-6116 Software (Retrofit Selective Catalytic Reduction Land Software)

Note: The previous software was revision CL 6.0.9.

1. Standby: In this mode the green LED is the only light on. No air or DEF is flowing and the system has purged itself. Standby is the default mode and the mode the system will return to anytime an operational condition is not met (see STATUS section).

2. Startup: Start-up mode is used any time the system switches from standby to normal operation. This mode will fill the DEF line so NO_x reduction can begin immediately. The blue LED will turn on once DEF starts to flow.

3. Run: The system enters this mode once the startup mode is completed. The Run mode is indicated by a solid blue LED (to indicate DEF flow). When in Run mode the DEF is being dosed to the injector assembly according to the amount of NO_x in the exhaust, and the pump flow rate will vary accordingly.

4. Purge: Any time the system switches out of normal operation the system will enter a purge mode to dry out the DEF lines. Purge mode is indicated by a flashing blue LED and a pump speed of zero. Pressurized air is flowing through both the air line and the DEF line at this time. The purge cycle lasts for 6 minutes.

5. Fault: If the system is experiencing a sensor fault or a low air line pressure for more than 8 hours continuous, the system goes into a fault to alert the operator. The green LED is on and the red LED is flashing.

Webpage Interface for the 450-6116 Software (Retrofit Selective Catalytic Reduction Land Software)

This section details use of the web page Interface, whether you choose to connect with a laptop or locally using the touch monitor. If using the touch monitor and you desire to input numeric values, enlarge the numeric keypad on the top of the touch monitor.

Alternately, you can connect a USB keyboard to a USB port on the touch monitor. If connected with a laptop, simply use the computers keypad to enter the values.

The interface is divided into three tabbed pages: Operation, Status and About. The program automatically opens to the Operation Page of the web page Interface.

Launch and save the following addresses to the Toolbar for easy access:

http://169.254.0.2/epod/web/setup.htm
http://169.254.0.2/epod/web/operation.htm

Operation Page

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Illustration 11	g03413240

The "Operation" page web address is http://169.254.0.2/epod/web/operation.htm

In the "Operation" page, as shown above, the user can monitor all operating parameters as well as change the desired amount of NO_x reduction. The following parameters are viewed:

Desired NO_x reduction, percent
Actual NO_x reduction, percent
Pump output of DEF, liters per hour
Pre-SCR catalyst NO_x value, ppm (or Engine out NO_x)
Post-SCR catalyst NO_x value, ppm (or Stack out NO_x)
Boost pressure, psi
Boost or intake manifold temperature, °C
Exhaust backpressure, inches of water
Exhaust temperature, °C
Mode of operation
Cumulative DEF
Last cumulative DEF reset
Engine hours (length of time since commissioning that the system has sensed a boost pressure)
E-POD hours (length of time pump is operating)
System status

There is one input variable (Desired Reduction) for operator control. To change the value of a variable, strike the white box with your stylus or mouse. Enter the desired value in the appropriate white box by striking numbers with the stylus or with your keyboards numeric keypad. To accept the value, click anywhere outside of the box. Hitting "enter" on a laptop or USB keyboard will not cause the value to be accepted. Always verify that the value in the gray box has changed as this value is the value the SCR Controller uses. Click the "Save" button if you want the desired reduction that you entered to be permanent in the program.

Status Page

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Illustration 12	g03413239

The "Status" page displays the status log file. Any changes to the status of the system will be recorded on this page. The systems status is also shown in "Operation" page in the status box. Possible text displays, with an explanation of each, follows:

No problems found - System is operating.
Air line pressure too low - The air solenoid is open, but the line pressure is not high enough to open the pressure switch. A warning is displayed and the system enters "Purge" mode.
Exhaust temperature too low - The exhaust temperature is lower than the software imposed limit.
Boost pressure too low - The boost pressure is lower than the software imposed limit. A warning is displayed.
Hardware Purge - The DIN-Block mounted purge switch is in the "ON" position.
Exhaust Pressure Sensor Fault: Check Connections – The SCR Controller is not receiving a signal from the exhaust pressure transducer. Check the wiring and transducer for problems.
Boost Pressure Sensor Fault: Check Connections – The SCR Controller is not receiving a signal from the boost pressure transducer. Check the wiring and transducer for problems.

If the NO_x sensors are inoperable, the system defaults to an Open loop condition where flow is based upon turbo boost pressure. Actual reductions will read a constant 85 percent reduction. These codes continue until the NO_x sensor error is corrected. Refer to Troubleshooting, UENR4333, "Diagnostic Codes" for more information.

Note: During OL Mode, the system will display an 85 percent reductions in the Actual Reductions, this reduction is a default value the Actual Reductions is unknown.

About Page

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Illustration 13	g03670562

The "About" page displays basic information such as serial numbers and software version, for the SCR system in operation.

Setup Page

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Illustration 14	g03432482

The "Setup" page web address is http://169.254.0.2/epod/web/setup.htm.

Boost Multiplier: 25.00 Factory setting do not change.
Boost Offset: -0.5 Starting point for sensor calibration: Add to decrease sensor reading. Lower to increase reading.
Dp Multiplier: 9.0025 Factory setting do not change.
Dp Offset: -0.5 Starting point for sensor calibration: Add to decrease sensor reading. Lower to increase reading.
Pump Multiplier: 500 (Starting point) (DDA-17 = 1600) - Set Pump Output to high end of range. Example, DME 60 Calibrate high side using 55Lhr, low side 5Lhr
Pump Offset: 500 is the starting point, fine-tune
Pump Output: Only works in "Setup" mode. Enter desired value to manually control dosing. Mainly for OL Map setup and calibration of the pump.
Radio Buttons will manually operate the LEDs and solenoids while in "Setup" mode.

Note: Operator must save all variables and manually select the "Exit Setup" button or unit will remain in "Setup" mode.

Closed Loop Tuning Page

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Illustration 15	g03659477

The Catalyst Temp Low Limit is the SCR Systems starting temperature, measured in degrees C, to allow Startup mode.

The Boost Pressure Low Limit is the threshold which activates the Purge cycle. To set the Boost Pressure Low Limit, a pressure reading should be taken at a 0 percent load situation.

Note: Usually increase 7 to 14 kPa (1 to 2 psi) for Diesel and Natural Gas engines. Natural Gas engines will require an adjustment of the load point settings to bring up to positive boost reading.

To set the Exhaust Pressure Low Limit, record exhaust pressure in a 0 percent load situation. Using the recorded pressure, add 1 inch H2O and enter the value in the Exhaust Pressure Low Limit input field.

Maximum System Efficiency is the maximum amount of efficiency the system is required to achieve. This number is not adjusted and its purpose is to prevent Ammonia Slip.

Slip Time is the time the controller takes to update the flow rate of the dosing pump to prevent Ammonia Slip. Base Loop Time is the time the controller takes to update the flow rate of the dosing pump to prevent low NO_Xconversion. The Slip Time and Base Loop Time are tuned per site and should have the same value.

Note: Larger systems and colder weather applications will require more time.

All other settings on the CL Tuning page are default and should not be changed. The default values are set for the system to operate efficiently in Closed Loop (CL) mode.

NH3 Flow Adjust Min: A minimum percent adjustment of DEF flow for Cat SCR ECM to achieve Desired Reductions.

NH3 Flow Adjust Max: A maximum percent adjustment to DEF flow for the Cat SCR ECM to achieve Desired Reductions.

Open Loop Tuning Page

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Illustration 16	g03670669

The "OL Tuning" page web address is http://169.254.0.2/epod/web/oltuning.htm.

OL Map: Record Boost readings at each Load Point
OL Map: Record Pump Flow rate at each Load Point for site specific NO_x reduction
Flow rate needed to achieve 85 percent reduction (or 5 percent below Desired Reduction)
Startup pump Output: The amount of DEF that will be dosed during the startup procedure to fill the Tube Wire Bundle (TWB). 100 percent load flow rate or greater if required
Startup Output time: Record the amount of time 100 percent flow rate is needed to fill TWB and prime DEF to Nozzle. Delivery gauge will increase to 5 to 8 psi once DEF reaches the nozzle.

Configuration Page

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Illustration 17	g03432492

The "Configuration" page web address is http://169.254.0.2/epod/web/IPConfig.htm.

All SCR Controllers are shipped from the factory with the IP address and subnet mask listed below:

IP Address: 169.254.0.2
Subnet Mask: 255.255.0.0
Port: 502
Socket: 1 (if needed)

Changing the IP address of the SCR Controllers can be done using the "Configuration" page. If the IP address and subnet mask of the SCR Controller are changed, then the new IP address and subnet mask values when configuring the MODBUS TCP/IP server to communicate with the SCR Controller. The touch monitor will also need to be reconfigured. Refer to Testing and Adjusting, "Touch Monitor - Setup" Because the IP address and subnet mask of the SCR Controller is configurable, it is possible to place multiple SCR Controllers on a network. The port and socket values are not configurable on the SCR Controllers.

Modbus Key activation: Used for earlier versions of software. Enter one of the following Modbus Keys into the appropriate SCR Controller "New Modbus Key":

Red SCR Controllers, MODBUS Key = 6E01C724
Blue SCR Controllers, MODBUS Key = FFFFD14C
Green SCR Controllers, MODBUS Key = 5849EAB4

If this process does not work, take a snapshot of all web pages for reference, upgrade to the current software, and manually enter all settings. The current 450-7654 Software (Retrofit Selective Catalytic Reduction Software) will not need the New MODBUS Key.

Modes of Operation for the 450-6117 Software (Retrofit Selective Catalytic Reduction Marine Software)

Note: The previous software was revision CL 5.1.9.

Webpage Interface for the 450-6117 Software (Retrofit Selective Catalytic Reduction Marine Software)

Alternately, you can connect a USB keyboard to a USB port on the touch monitor. If connected with a laptop, simply use the computers keypad to enter the values.

The interface is divided into three tabbed pages: Operation, Status and About. The program automatically opens to the Operation Page of the web page Interface.

Launch and save the following addresses to the Toolbar for easy access:

http://169.254.0.2/epod/web/setup.htm
http://169.254.0.2/epod/web/operation.htm