Servomex SERVOPRO Operator's Manual
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Servomex SERVOPRO Operator's Manual

Nox gas analyzer
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NOx Gas Analyzer
Operator Manual
Part Number:
221195
Revision:
1
Language:
English
SERVOPRO

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Summary of Contents for Servomex SERVOPRO

  • Page 1 SERVOPRO NOx Gas Analyzer Operator Manual Part Number: 221195 Revision: Language: English...

  • Page 2: Table Of Contents

    Proper Storage ..........................25 Using the Keypad ......................... 26 Menu Flow Chart ......................... 28 Main Menu ..........................28 Calibration Menu ........................29 Range Menu ..........................30 Diagnostics Menu ........................31 Setup Menu ..........................32 Alarms Menu ..........................33 SERVOPRO NOx Analyzers Page 1...
  • Page 3 Calibration Setup ........................65 Deviation Limits .......................... 76 Maximum Calibration Error ......................77 Maximum Verifying Error ......................78 Calibration Factors ........................81 Range Setup ..........................94 Diagnostics..........................99 Setup Menu ..........................110 Alarms Menu ..........................137 SERVOPRO NOx Analyzers Page 2...
  • Page 4 Service Menu ..........................147 SEcurity ............................. 150 Communication and Interface .................... 154 Analog and Digital Interface ..................... 154 Serial Interface ......................... 159 AK Protocol ..........................161 Modbus Protocol ........................187 SERVOPRO NOx Analyzers Page 3...

  • Page 5: Introduction

    The heated version of the SERVOPRO NOx is not configurable with the optional O2 sensor, this is only available in the standard version. It does however include a unique internal oven that maintains all wetted sampling components before the detector at an elevated, customer-specified temperature set to 100°C when running emissions from a...
  • Page 6 PMT detector. Delivering excellent linear analysis from trace levels to high ppmv concentrations (0- 3ppm to 0-3,000ppm) the SERVOPRO NOx analyzer is ideal for continuous monitoring of industrial stationary sources emissions or ambient air monitoring. Equipped with a...
  • Page 7 Operating Principle The SERVOPRO NOx analyzer utilizes the principle of chemiluminescence for analyzing the NO, NOx or NO2 concentration within a gaseous sample. The sample enters the analyzer directly into a heated chamber and is maintained at an elevated temperature. The moisture will remain in the vapor state, ensuring no loss of the NO2. In...
  • Page 8 The sample is vented from the chamber through a ¼ -inch (6mm) tube. The chamber contains a long-pass filter that is sealed with an integral O ring. The chamber assembly is mounted to the photodiode. SERVOPRO NOx Analyzers Page 7...
  • Page 9 , NOx Ranges Four operator-definable ranges from 0-3 to 0-3,000 ppm. O2 Range Optional Paramagnetic O2: Range 0 – 25% Response Time T90 < 2 seconds at 0.6 LPM Detection Limit < 30 ppb using 2x Noise SERVOPRO NOx Analyzers Page 8...
  • Page 10 Manual/Remote/Auto Cycle (remote NOx mode by dry contact closure) Sample Temperature 50°C non-condensing sample Ambient Temperature 5 to 40°C. Ambient Humidity Less than 90% RH non-condensing. Warm-up Time 1 hour (typical). Fittings 6mm (¼-inch) tube fittings. SERVOPRO NOx Analyzers Page 9...
  • Page 11 Power Requirements 115 VAC/60 Hz or 230 VAC/50 Hz (±10% 750 Watts maximum) Dimensions 133.35mm (5.25”) H x 482.6mm (19”) W x 584.2mm (23”) D Weight Approximately 21.8kg (48lbs) depending on options SERVOPRO NOx Analyzers Page 10...

  • Page 12: Installation

    A “WARNING” safety alert appears with information that is important for protecting you, other people and equipment from damage. Pay especially close attention to all warnings that apply to your application. SERVOPRO NOx Analyzers Page 11...
  • Page 13 Some or all of the above symbols may appear in this manual or on the equipment. This manual should be consulted whenever one of these symbols is encountered on the equipment. ALWAYS REMOVE POWER BEFORE CONNECTING OR DISCONNECTING SIGNAL CABLES OR WHEN SERVICING THE EQUIPMENT SERVOPRO NOx Analyzers Page 12...

  • Page 14: Unpacking Instructions

    The shipping container and packaging are specially designed to protect the analyzer in transport. If you ever need to return the analyzer to SERVOMEX for repair or any other reason, the original shipping container and packaging should be used.
  • Page 15 Asia Systems Engineering and Service Centre Bldg. 9, Shanghai Euromate Industrial Park No.88 Yuanshan Road Xinzhuang Industrial Park Shanghai 201108, P.R.China Tel: +86 021 6489 7570 Asia_Sales@Servomex.com Asia_Service@Servomex.com SERVOPRO NOx Analyzers Page 14...

  • Page 16: Rack Mounting

    Only present in analyzers with optional solenoid valves; otherwise this port is plugged. 9. Vent to exhaust from reaction chamber, ¼-inch (6mm) tube fitting. 10. Sample Gas Bypass outlet (vent) for exhaust of sample, ¼-inch (6mm) tube. SERVOPRO NOx Analyzers Page 15...
  • Page 17 11. Sample Gas inlet for introducing sample gas into the analyzer, ¼-inch (6mm) tube. 12. Analyzer filter housing (Standard configurations only) SERVOPRO NOx Analyzers Page 16...

  • Page 18: Site Selection And Mounting

    5. The instrument is designed for rack mounting. Optional rack-mount slides are available. 6. Do not install the SERVOPRO NOx analyzer near equipment that emits electromagnetic interference (EMI). NOTE: A front and rear supporting brace or equivalent is required if the optional rack mount slides were not purchased.

  • Page 19: Electrical

    NOTE: A defective ground may affect the analyzer’s operation. Shielded wiring is recommended for output signals. Output Connections See the Analog and Digital Interface section of this manual for instructions for the various output selection options. Shielded wiring is recommended for output signals. SERVOPRO NOx Analyzers Page 18...

  • Page 20: Recommended Gases

    RECOMMENDED GASES Zero calibration for the SERVOPRO NOx requires ultra high-purity nitrogen (UHP N or calibration-grade air, plus a span gas. The recommended span gas for this analyzer is NO in a background of N . NO in a background of air is not recommended as some of it...

  • Page 21: Gas Handling Equipment

    Pressure regulators for zero gas (air or N ), ozone supply (air or O ) and span gas cylinders are required for gas analysis using the SERVOPRO NOx analyzer. NOTE: High levels of ammonia (greater than 10 ppm NH ) may reduce the NO converter's efficiency to a level that is unacceptable.

  • Page 22: Sampling Requirements

    (EPC). The regulator is factory adjusted for optimal analyzer performance. The ozone supply (air or O ) air cylinder pressure should be set at approximately 25 PSIG (standard without ozone pump option). The sample entering the instrument is SERVOPRO NOx Analyzers Page 21...
  • Page 23 Pressure at this outlet should be kept at atmospheric level. ANY backpressure will cause an error in reading. The vent outlet is located on the rear panel and may contain high levels of ozone that should be vented away from the instrument. SERVOPRO NOx Analyzers Page 22...

  • Page 24: Startup And Shutdown

    If the problem persists, call SERVOMEX Technical Support. Refer to the Using the Keypad section and review the complete Operator’s Manual for detailed instructions for proper setup and operation of the SERVOPRO NOx. SERVOPRO NOx Analyzers Page 23...

  • Page 25: Shutdown Procedure

    3. Allow the analyzer to draw in room air for approximately 10 minutes, or flush out any remaining sample that could cause condensation as the analyzer cools. 4. Turn off the optional internal sample pump by setting the analyzer to Standby. 5. Turn off the analyzer power. SERVOPRO NOx Analyzers Page 24...

  • Page 26: Proper Storage

    Storage should be in a reasonably temperature-controlled environment and away from any possible exposure to dust and water or other liquids. SERVOPRO NOx Analyzers Page 25...

  • Page 27: Using The Keypad

    1. In the Number Entry (N) mode, this key is used to set a decimal in place. 2. Any other time the analyzer is in the Function mode (F) and the key is used to return you to the measurement screen. SERVOPRO NOx Analyzers Page 26...
  • Page 28 The up and down arrow keys change the value within a field that has the cursor underneath it. c. The arrow keys are also used to scroll the input possibilities and edit the numbers. SERVOPRO NOx Analyzers Page 27...

  • Page 29: Menu Flow Chart

    MENU FLOW CHART The Menu Flow Chart is a handy reference that will help you familiarize yourself with the operation of the SERVOMEX SERVOPRO NOx Analyzer. Start by pressing access the Main Menu to quickly find any screen. MAIN MENU...

  • Page 30: Calibration Menu

    CALIBRATION MENU SERVOPRO NOx Analyzers Page 29...

  • Page 31: Range Menu

    RANGE MENU SERVOPRO NOx Analyzers Page 30...

  • Page 32: Diagnostics Menu

    Raw Value Diagnostic I/O Status Status Line Display Values Analyzer Digital ← Temps → Turn Status Line Outputs ← Press → ← → ← Flows → Analyzer Digital Turn Status Line Inputs Programmable Digital Outputs SERVOPRO NOx Analyzers Page 31...

  • Page 33: Setup Menu

    SETUP MENU SERVOPRO NOx Analyzers Page 32...

  • Page 34: Alarms Menu

    ALARMS MENU Menu Main Menu Menus Alarms Alarm Display Current Alarms Alarm Log Alarm Limits On/Off Turn Alarm Temperatures Display On Turn Alarm Pressures Display Off EPC Voltages Concentrations SERVOPRO NOx Analyzers Page 33...

  • Page 35: Service Menu

    SERVICE MENU Menu Main Menu Menus Service Linear Factory Service use Only Coefficients Range 1 Range 2 Range 3 Range 4 SERVOPRO NOx Analyzers Page 34...

  • Page 36: Security Menu

    SECURITY MENU Menu Main Menu Menus Security Operator Levels Reset Password Change Password Standard Functions Setup Functions Factory Functions SERVOPRO NOx Analyzers Page 35...

  • Page 37: Main Menu

    NOTE: The Main Menu is your gateway to operational, setup and maintenance functions on the SERVOPRO NOx Analyzer via the corresponding function keys. All software functions of the SERVOPRO NOx Analyzer can be reached via the menu above from the Main Menu screen.

  • Page 38: Measure Screen

    The Measure Screen is accessed by pressing the key. To access the Measure Screen from the Main Menu, press Please review the descriptions below (corresponding with the callouts on the illustration above) to familiarize yourself with the Measure Screen. SERVOPRO NOx Analyzers Page 37...
  • Page 39 Indicates how the keypad input is currently being used. F is for functions, N is for numeric input. Shortcut Menu: Scrollable list of shortcut functions available from the Measurement screen. Shortcut Tag Description Left or right arrows are used to scroll through the shortcut menu. SERVOPRO NOx Analyzers Page 38...
  • Page 40 This screen allows operators to customize Range Limits the analyzer’s ranges. Operators can change Span gas Span Conc concentrations for multiple ranges. Allows operators to set or adjust the NO Factors Correction Factors. SERVOPRO NOx Analyzers Page 39...

  • Page 41: Measure Mode

    Measure screen. Press to set the analyzer in NO only mode. Press to set the analyzer in NO only mode. Press to set the analyzer in NO/NO mode. SERVOPRO NOx Analyzers Page 40...
  • Page 42 → → To move to the NO mode, press while in the Measure Mode menu. In NO mode, the sample gas does not pass through the analyzer’s NO converter. The final reading is NO only. SERVOPRO NOx Analyzers Page 41...
  • Page 43 MODE → → To change to the NOx mode, press while in the Measure Mode menu. In NO mode, the sample gas passes through the NO converter and the analyzer measures total NO SERVOPRO NOx Analyzers Page 42...
  • Page 44 At that point, the difference between the averaged value of NO and NO is calculated as the NO concentration. The cycle continues to repeat. For advanced calibration and operation in NO/NOx/NOx mode, see NOx Correction Factors. SERVOPRO NOx Analyzers Page 43...

  • Page 45: Analyzer Info

    ANALYZER INFO → NOTE: The Analyzer Info screen contains the basic identity of your SERVOPRO NOx Analyzer. The Analyzer Info screen is accessed by pressing the key on the Main Menu. This screen includes the Model and Serial Number of your analyzer (for easy identification if you are discussing your analyzer with SERVOMEX), factory settings for sample pressure and air pressure, and the software versions being used.

  • Page 46: Remote/Manual

    The analyzer can be controlled remotely via:  TCP/IP Modbus  RS-232 AK Protocol  Digital inputs (contact closure) located on the rear of the analyzer. NOTE: AK Protocol works with both TCP/IP and Serial. Modbus only works with TCP/IP. SERVOPRO NOx Analyzers Page 45...

  • Page 47: Standby

    NOTE: When the analyzer is in Standby Mode, the pump is turned off and the solenoid valves are closed. The SERVOMEX logo is displayed along with the Serial Number. Standby Mode is accessed by pressing the key from the Main Menu.

  • Page 48: Menus

    Range Setup menu. Press to access the Diagnostics menus. Press to access the Setup menus. Press to access the Alarms menu. Press to access the Service menu. Press to access the Security menu. SERVOPRO NOx Analyzers Page 47...

  • Page 49: Calibration

    CALIBRATION → → NOTE: The SERVOPRO NOx Analyzer requires initial calibration with zero and span calibration standards before operation. These calibrations can be performed manually or initiated automatically. From the Menus screen press to access the Calibration menu. The Calibration menu includes important features including basic setup for both manual and automated calibration.

  • Page 50: Preparing The Analyzer For Calibration

    Calibration Setup, or you can use → → → this menu path to access the Calibration Setup menu: . If you are not making changes to the factory settings, proceed to Manual Calibration. SERVOPRO NOx Analyzers Page 49...

  • Page 51: Manual Calibration

    NO or NO mode. In NO/NO mode, the analyzer has basic zero and span capability in NO mode and also includes the added NO Correction Factor feature. See Correction Factors for details. SERVOPRO NOx Analyzers Page 50...
  • Page 52 In Single Mode operation the analyzer can only be calibrated for one mode. The Manual Calibration menu is accessed by pressing from the Calibration menu. Press to access the Manual Zero Calibration screen. Press to access the Manual Span Calibration screen. SERVOPRO NOx Analyzers Page 51...
  • Page 53 The other option is (Cal) Via Valves. See Calibration Setup for details. Introduce zero gas into the rear of the analyzer. Press to go to the Diagnostic Values screen to view the current diagnostic values. Check the temperatures and SERVOPRO NOx Analyzers Page 52...
  • Page 54 If the calibration was successful, the screen will say ***Saved Current*** above the concentration value. Example of a successful calibration. If the calibration was unsuccessful, the screen will say Outside Deviation Limits. Example of an unsuccessful calibration. SERVOPRO NOx Analyzers Page 53...
  • Page 55 → → → → → 4. Check Maximum Calibration Error under Calibration Setup: → → → → → After a successful Manual Zero Calibration, press the back button to return to the Manual Calibration menu. SERVOPRO NOx Analyzers Page 54...
  • Page 56 Make sure the analyzer is in the range you wish to calibrate. Use the Up/Down arrows to go to the desired range. The illustration shows the range (R2) next to the maximum range limit (30.00 ppm). SERVOPRO NOx Analyzers Page 55...
  • Page 57 3. Check Span Gas Deviations under Manual Deviations: → → → → → 4. Check Maximum Calibration Error under Calibration Setup: → → → → → After a successful Manual Zero and Span Calibration, the analyzer is ready for use. SERVOPRO NOx Analyzers Page 56...
  • Page 58 Press to access the Manual Span Calibration screen. For details on span calibration Manual Calibration NO or NO Mode. Press to access the NO Calibration Factors menu. For details on advanced calibration see Correction Factors. SERVOPRO NOx Analyzers Page 57...

  • Page 59: Automated Calibration

    NOTE: An automated calibration should not be attempted before manual zero and span calibrations have been successfully performed.  If a manually initiated sequenced calibration or sequenced calibration check is selected, it will apply only to the range that is currently in use. (Each additional SERVOPRO NOx Analyzers Page 58...
  • Page 60 Automatic calibration of multiple ranges is also possible. See Calibration Setup.  If a sequenced calibration was unintentionally started, pressing the back button before the Zero step is completed will cancel the calibration. SERVOPRO NOx Analyzers Page 59...
  • Page 61 (in this case, it is Purging with Sample). Each step uses a countdown timer set up in AutoCal Timing, located in the Calibration Setup menu. The sequence (with the current range indicated) is as follows: SERVOPRO NOx Analyzers Page 60...
  • Page 62 (for example, Span Gas Deviation Error!). The analyzer will then return to the Measure Screen and will revert to the last successful calibration values. A calibration error is set and will remain until cleared by a successful calibration. SERVOPRO NOx Analyzers Page 61...
  • Page 63 To view or verify zero or span deviations, go to the AutoCal Deviations menu under Calibration Factors. To view or change the maximum allowable calibration tolerances, Deviation Limits. SERVOPRO NOx Analyzers Page 62...
  • Page 64 Rather than initiating a calibration, it checks the validity of your most current calibration. A sequenced calibration check performs all of the steps of a sequenced calibration with the exception of the zero and span calibrations. It does not set new offsets, gains or any alarms. SERVOPRO NOx Analyzers Page 63...

  • Page 65: Cal Gas Concentrations

    Press the Enter button again to close the span gas value field. Press to save the changes. SERVOPRO NOx Analyzers Page 64...

  • Page 66: Calibration Setup

    Please note that the Calibration Setup menu shows the current settings on the right side of … the screen after the (  Example: Cal Pump/Valves . . . Valves. SERVOPRO NOx Analyzers Page 65...
  • Page 67 (in the example, Start Time: 12). Press Enter to open the field and change the value. Press Enter again to close the field after you have made your changes. SERVOPRO NOx Analyzers Page 66...
  • Page 68 AutoCal Schedule screen. The current setting is shown on the right side of the menu after the (. . .). In the example above the mode is OFF: Timed Cal On/Off . . . Off. SERVOPRO NOx Analyzers Page 67...
  • Page 69 The first changeable parameter is the Range to be calibrated. Press Enter to open the field and change the range. Then select a range (from 1 – 4) for calibration. To select all ranges, press 0. Press Enter to close the field. SERVOPRO NOx Analyzers Page 68...
  • Page 70 The second parameter the operator can change is the Mode. The SERVOPRO NOx analyzer can calibrate in either NO or NOx mode. Press Enter to open the field and select the mode using the up/down arrows . Press Enter to close the field.
  • Page 71 NOTE: If the analyzer is equipped with a pump, to prevent damage to the pump do not pressurize the sample inlet. Press (Cal via Valves) to activate the appropriate calibration valve and keep the internal sample pump turned off during calibration. Keeping the sample pump turned off SERVOPRO NOx Analyzers Page 70...
  • Page 72 You will return to the Calibration Setup Menu.  The Calibration Setup menu shows the current setting on the right side of the screen.  Example: Cal via Pump/Valves … Valves. SERVOPRO NOx Analyzers Page 71...
  • Page 73 (. . .).  Example: AutoCal/Check . . . Cal. Press to set the analyzer Auto Cal/Check parameter to Check. The setting will be saved automatically.  The analyzer returns to the Calibration Setup menu. SERVOPRO NOx Analyzers Page 72...
  • Page 74  The Calibration Setup menu shows the current setting on the right side of the screen after the (. . .).  Example: AutoCal/Check . . . Check. SERVOPRO NOx Analyzers Page 73...
  • Page 75 Purge Before, Calibration and Verification times. The Total Auto Calibration time is equal to the sum of the Zero and Span cycle times plus the Purge After time. See the example above. SERVOPRO NOx Analyzers Page 74...
  • Page 76 4. Purge After: the operator can set the time needed to flush any remaining calibration gases out of the analyzer before the In Cal Status is released and the measurement status is set. After the Auto Calibration Timing has been set, press to save the changes. SERVOPRO NOx Analyzers Page 75...

  • Page 77: Deviation Limits

    To access the Deviation Limits menu, press from the Calibration Setup menu. Press to set or view the Maximum Calibration Error Limits. Press to set or view the Maximum Verifying Error Limits. SERVOPRO NOx Analyzers Page 76...

  • Page 78: Maximum Calibration Error

     Press to save your changes.  Absolute Deviation is used to compare the factory-set calibration to the current calibration.  Relative Deviation compares the current calibration to the previous calibration. SERVOPRO NOx Analyzers Page 77...

  • Page 79: Maximum Verifying Error

     Press Enter to open the field to change the value in %.  Press Enter again to close the field.  Press to save your changes. SERVOPRO NOx Analyzers Page 78...
  • Page 80 From the Analog Hold On Cal menu, press to turn Analog Hold Off.  This will allow the analog outputs to be live and reporting out values during calibration.  Once pressed it will return to the Calibration Setup menu. SERVOPRO NOx Analyzers Page 79...
  • Page 81  The Calibration Setup menu shows the current setting at the bottom-right corner of the screen after the (. . .).  Example: Analog Hold on Cal . . . Off. SERVOPRO NOx Analyzers Page 80...

  • Page 82: Calibration Factors

    To access the Calibration Factors menu, press from the Calibration menu. Press to view the Manual Calibration Deviations menu. Press to view the Auto Calibration Deviations menu. Press to access the Offset and Gain Factors screen. SERVOPRO NOx Analyzers Page 81...
  • Page 83 NOTE: The Manual Deviations menu allows the operator to view the Zero and Span Deviations from manual calibrations. Press from the Calibration Factors menu to access the Manual Deviations menu. Press to view Zero Gas Deviations. Press to view Span Gas Deviations. SERVOPRO NOx Analyzers Page 82...
  • Page 84  Absolute Zero Gas Deviation is the zero gas content calculated by the factory polynomial related to the calibrated range limit.  Relative Zero Gas Deviation is the current deviation minus the deviation of the previous calibration related to the calibrated range limit. SERVOPRO NOx Analyzers Page 83...
  • Page 85  Absolute Span Gas Deviation is span gas bottle value minus span gas value calculated by the factory polynomial related to the calibrated range limit.  Relative Span Gas Deviation is the current deviation minus the deviation of the previous calibration. SERVOPRO NOx Analyzers Page 84...
  • Page 86 The verifying deviations are taken during the verifying stage of sequenced and auto calibrations. Press from the Calibration Factors menu to access the Auto Cal Deviations menu. Press to view the Verifying Zero Deviations screen. Press to view the Verifying Span Deviations screen. SERVOPRO NOx Analyzers Page 85...
  • Page 87 Measured Value is the averaged concentration during the Verifying Zero stage of sequenced and auto calibrations. Variance is the difference of the measured value and zero. % FS is the percent of full scale related to the calibrated range limit. SERVOPRO NOx Analyzers Page 86...
  • Page 88 Measured Value is the averaged concentration during the Verifying Span stage of sequenced and auto calibrations. Variance is the difference of the measured value and span gas concentration. % FS is the percent of full scale related to the calibrated range limit. SERVOPRO NOx Analyzers Page 87...
  • Page 89 Calibration Factors menu to access the Offset/Gain Factors screen. Offset is the difference between factory zero and the value stored during zero calibration. Gain is the value stored during span gas calibration using the operator-defined calibration gas. SERVOPRO NOx Analyzers Page 88...
  • Page 90 Offsets and Gains, or both Factory Linear Coefficients and Offsets and Gains for all calibrated ranges. Resetting factory settings will not affect any other operator-changed parameters. Press to reset the Offsets and Gains. Press to reset the Linear Coefficients, Offsets and Gains and NO Factors. SERVOPRO NOx Analyzers Page 89...
  • Page 91  Offset and Gain factors are created when the analyzer is zeroed and spanned.  If the Offsets and Gains are reset, the analyzer must be zeroed and spanned again before use.  All recorded deviations will be set to zero. SERVOPRO NOx Analyzers Page 90...
  • Page 92 If you press (No) from the Reset Offsets and Gains screen, the analyzer will return to the Reset Factory Settings menu without resetting the Offsets and Gains. SERVOPRO NOx Analyzers Page 91...
  • Page 93 Factors to factory default settings and brings you to this confirmation screen: NOTE: After resetting Linear Coefficients, the analyzer must be zeroed and spanned before further use. If you press (No) from the Reset Linear Coefficients screen, the analyzer will return SERVOPRO NOx Analyzers Page 92...
  • Page 94 Reset Factory Settings menu without resetting the Linear Coefficients, Offsets and Gains Factors or NO Correction Factors. SERVOPRO NOx Analyzers Page 93...

  • Page 95: Range Setup

    Range Setup menu. The Range Setup menu shows the current status on the right side of the screen after the (…). Example: AutoRange On/Off … Off. Press to view or change Auto Range Switch Points. SERVOPRO NOx Analyzers Page 94...
  • Page 96 Press Enter again to close the field. Press to save your changes. To initiate the saved changes, press , then press select new ranges. NOTES: 1. The Range Limit values must be set in ascending order. SERVOPRO NOx Analyzers Page 95...
  • Page 97 4. To set two ranges, set Range 1 to the lowest value, Range 2 to the highest value, and the others to zero. 5. If new ranges are saved, the Auto Range Switch Points will be set to default percentages of range limits. See Auto Range Switch Points. SERVOPRO NOx Analyzers Page 96...
  • Page 98 Auto Range Off. When Auto Range is Off, the operator will need to manually change the ranges. The Range Setup menu shows the current status on the right side of the screen after the (…). Example: AutoRange On/Off … Off. AUTORANGE SWITCH POINTS SERVOPRO NOx Analyzers Page 97...
  • Page 99 Press Enter again to close the field. Press to save your changes. To initiate the saved changes, press , then press and select new Auto Range Switch Points. SERVOPRO NOx Analyzers Page 98...

  • Page 100: Diagnostics

    EPC voltage percentages and flows. Press to access the Raw Values Display menu. Press to access the I/O Status menu. You can check the status (Open or Closed) of the analyzer’s digital outputs and inputs. SERVOPRO NOx Analyzers Page 99...
  • Page 101 As indicated at the bottom of the screen, use the left and right arrow keys scroll to different screens. The current screen will be highlighted (Temps in the example). SERVOPRO NOx Analyzers Page 100...
  • Page 102 The Pressures screen displays current sample and air pressures and low and high alarm limits in PSIG. EPC Voltage Percent Screen The EPC screen displays the percentage of EPC voltage being supplied to the EPC valve. SERVOPRO NOx Analyzers Page 101...
  • Page 103 RAW VALUES DISPLAY → → → → NOTE: The Raw Values Display screen is a diagnostic tool for viewing detector Raw Volts and Calculated Concentrations. SERVOPRO NOx Analyzers Page 102...
  • Page 104 Zero valve (if your analyzer is equipped with optional calibration valves). Zero will be indicated above the range (at the bottom right of the screen). To return to the Measure mode, press F4 again. Meas will be indicated above the range on the screen. SERVOPRO NOx Analyzers Page 103...
  • Page 105 AutoRange is turned Off. When AutoRange is turned ON, it is indicated with an A before the range: Example: AR1: 3.000 as shown above. I/O STATUS → → → SERVOPRO NOx Analyzers Page 104...
  • Page 106 Press to view the status of the analyzer’s digital inputs. Press to view the status of the Programmable Digital Outputs. ANALYZER DIGITAL OUTPUTS → → → → SERVOPRO NOx Analyzers Page 105...
  • Page 107 It can be measured from the Main Connector Pin 6 (digital ground) to the Main Connector Pin 11. NOTE: These analyzer functions are not user-changeable and have static pin outs. These screens are for viewing only. ANALYZER DIGITAL INPUTS → → → → SERVOPRO NOx Analyzers Page 106...
  • Page 108 12 is the Pin Number on that connector. The abbreviations are as follows: M = Main Connector A = Auxiliary Int = Internal, for SERVOMEX use only. When the analyzer is in Remote Mode and the digital input is pulled to digital ground (Main Connector, Pin 6), the status will become Closed.
  • Page 109 Operator-programmed function Status The state the programmed relay is in (open or closed) NOTES:  To set functions, see Programmable Digitals.  Programmed statuses are closed when true.  Programmed alarms are open when true. SERVOPRO NOx Analyzers Page 108...
  • Page 110 Press from the Status Line menu to turn the AK Status Line On. Press from the Status Line menu to turn the AK Status Line Off. Example of the Status Line turned on: 3: SMAN SERVOPRO NOx Analyzers Page 109...

  • Page 111: Setup Menu

    SETUP MENU → → NOTE: The Setup menu provides access to key setup screens including Measure Settings, Output Settings and TCP/IP Parameters. From the Menus screen press to access the Setup menu. SERVOPRO NOx Analyzers Page 110...
  • Page 112 Programmable Digital outputs can be viewed or set up to fit the operator’s needs. Press to view or change the current TCP/IP parameters. Press to access the Data Logging Time screen. (For SERVOMEX use only.) Press to view or make changes to the Auto Start Settings. Press to view or change the analyzer’s time and date.
  • Page 113 NOTE: The Averaging Time screen allows the operator to set the averaging time of the measured concentration. From Measure Settings menu press to access the Averaging Time screen. The Averaging Time is a sliding average. As shown above, it can be set from 0 – 60 seconds. SERVOPRO NOx Analyzers Page 112...
  • Page 114 All NO and NO readings are displayed as averaged values, and the sample read times can be adjusted by the operator. See NO/NO Mode for more information. SERVOPRO NOx Analyzers Page 113...
  • Page 115 NO and NOx modes while operating in the NO/NO mode. Press to access the NO Correction Factors menu from the Measure Settings menu. Notes:  NO Correction Factors is for advanced operators only and not necessary for normal operation. SERVOPRO NOx Analyzers Page 114...
  • Page 116 Manual Span Calibration screen. Introduce NO span gas into the rear of the analyzer. Set the concentration on the screen to match the Total Oxides of Nitrogen (NOx) concentration from the bottle SERVOPRO NOx Analyzers Page 115...
  • Page 117 The concentration value is temporarily set and will revert back to the original span concentration. Once the concentration stabilizes, press to set the NO correction factor. The correction factors are now set. Press to manually edit the NOx Factors. OUTPUT SETTINGS → → → SERVOPRO NOx Analyzers Page 116...
  • Page 118 Digital Output Assignments, choose Output Hold or Clear, or conduct an Output Test. PROGRAMMABLE ANALOGS → → → → NOTE: The Programmable Analogs menu provides access to the following Setup parameters: Output Assignments, Output Scaling and Output Adjustments. SERVOPRO NOx Analyzers Page 117...
  • Page 119 The operator can set the output to either current or voltage, and calibrate the outputs to exactly match the results obtained on a PLC or other remote data-recording device. SERVOPRO NOx Analyzers Page 118...
  • Page 120 Press to save your changes. NOTES: 1. Analog Output 1 (for example) is listed as AO-1 in the Output column. 2. For information on analog output connections see Analog and Digital Interface. SERVOPRO NOx Analyzers Page 119...
  • Page 121 Gas temperature of the rear-mounted chiller (°C). (Versions with chillers.) Sample EPC % of voltage supplied to the Sample electronic proportioning control valve. AirEPC % of voltage supplied to the Air electronic proportioning control valve. SERVOPRO NOx Analyzers Page 120...
  • Page 122 Programmable Analogs menu. NOTES:  Analog Output 1 is indicated as AO-1 in the Output column.  0 to 10 VDC output is used for the following three examples: SERVOPRO NOx Analyzers Page 121...
  • Page 123 Example: If Range 1 is set to 10 ppm and Range 2 is 100 ppm, in Range 1 10 ppm will = 10 VDC and in Range 2 10 ppm will = 10 VDC. OUTPUT ADJUSTMENTS SERVOPRO NOx Analyzers Page 122...
  • Page 124 Used to toggle between Measurement, 0%, 50% and 100% % FS Full scale. Offset Or Zero is used to adjust the output at 0%. Gain Or Span is used to adjust the output at 100%. SERVOPRO NOx Analyzers Page 123...
  • Page 125 You will return to the Programmable Analogs menu. NOTE: Failure to save your adjustments will result in the numbers reverting back to the defaults after power is turned off and back on. SERVOPRO NOx Analyzers Page 124...
  • Page 126 NOTE: The Programmable Digitals menu provides access to the analyzer’s digital outputs for viewing and changing Output Assignments, holding or clearing alarms, and testing the outputs. The Programmable Digitals menu is accessed by pressing from the Output Settings menu. SERVOPRO NOx Analyzers Page 125...
  • Page 127 NOTE: The Output Assignments screen allows the operator to assign any of the 15 programmable digital outputs to a specific alarm or status. From the Programmable Digitals menu press to access the Output Assignments screen. SERVOPRO NOx Analyzers Page 126...
  • Page 128  O2NC – O not calibrated  SEPC – Sample EPC Voltage  Conc1 – Concentration Alarm 1  AEPC – Air EPC Voltage  Conc2 – Concentration Alarm 2  ROvr – Over Range SERVOPRO NOx Analyzers Page 127...
  • Page 129  Oven Temperature  Sample EPC Voltage  Converter Temperature  Air EPC Coil Voltage  Pump Temperature  ADC Over Range  Diode Temperature  ADC Under Range  Cell Temperature  O2 ADC Error SERVOPRO NOx Analyzers Page 128...
  • Page 130 NOTES:  To manually clear held alarms, press from this menu. An output alarm cannot be cleared until the alarm is back within its limits. SERVOPRO NOx Analyzers Page 129...
  • Page 131 Programmable Digitals menu. The Output Test Warning screen first appears, asking if you wish to continue the output test. If you proceed with the test, you must reboot the analyzer to exit the output test. SERVOPRO NOx Analyzers Page 130...
  • Page 132 (they are all Open in the example). Press again to change all the output states back. Upon completion of the test, you will be required to reboot the analyzer to resume operation. TCP/IP PARAMETERS → → → SERVOPRO NOx Analyzers Page 131...
  • Page 133 The IP-address, Netmask and Gateway may be defined by the user. The Port and WinIfPort are assigned 7700 and 2000 by SERVOMEX and should not be changed unless required for a certain location.
  • Page 134 NOTE: Data logging allows the analyzer to store internal variables to support SERVOMEX troubleshooting. When troubleshooting with SERVOMEX Technical Support, the operator may be asked to turn this feature on. These files can only be accessed by SERVOMEX. To access the Data Logging screen, press from the Setup menu.
  • Page 135 Specify the range to set upon Power Up. Access Level Select the Operator Security Level. Remote/Manual Set whether the analyzer starts up in Remote or Manual mode. NO/NO Mode Select the mode the analyzer starts up in; NO, NO NO/NO mode. SERVOPRO NOx Analyzers Page 134...
  • Page 136 NOTE: The Clock Settings screen allows the operator to set the analyzer’s internal clock. The internal clock is used for auto calibrations and data time stamping. The Clock Settings screen is accessed by pressing from the Setup menu. SERVOPRO NOx Analyzers Page 135...

  • Page 137: Alarms Menu

    NOTE: The Alarms menu allows the operator to view Current Alarms, the Alarm Log and settable Alarm Limits. From the Menus screen press to access the Alarms menu. Press to access the Current Alarms screen and view the alarms that are currently active. SERVOPRO NOx Analyzers Page 136...
  • Page 138 NOTE: The Current Alarms screen allows the operator to view the analyzer’s current alarms at the time this screen was accessed. To access the Current Alarms screen press from the Alarms menu. Press to refresh this screen. (This screen does not auto refresh.) SERVOPRO NOx Analyzers Page 137...
  • Page 139 Conc2 – Concentration Alarm 2 SEPC – Sample EPC Voltage O2ADC – O ADC Alarm AEPC – Air EPC Voltage O2Conc1 – O Concentration Alarm 1 ROvr – Over Range O2Conc2 – O Concentration Alarm 2 SERVOPRO NOx Analyzers Page 138...
  • Page 140 ALARM ABBREVIATIONS AND DESCRIPTIONS SampP – Sample Pressure AOvr – ADC Over Range AirP – Air Pressure AUnd – ADC Under Range OvenT – Oven Temperature R1NC – Range 1 not calibrated SERVOPRO NOx Analyzers Page 139...
  • Page 141 NOTE: The Alarm Limits menu allows the operator to view or change the current upper and lower alarm tolerances. When the signals go above or lower than the assigned limit an alarm is triggered. To access the Alarm Limits menu, press from the Alarms menu. SERVOPRO NOx Analyzers Page 140...
  • Page 142 → → → → From the Alarm Limits menu, press to access the Temperatures screen. Use the left or right arrow to highlight the alarm limit you wish to change. Press Enter to open the SERVOPRO NOx Analyzers Page 141...
  • Page 143 Press Enter to open the field to change the value. After making a change, press Enter again to close the field. Press to save your changes. EPC VOLTAGES → → → → SERVOPRO NOx Analyzers Page 142...
  • Page 144 Press Enter to open the field to change the value. After making a change, press Enter again to close the field. Press to save your changes. CONCENTRATIONS → → → → SERVOPRO NOx Analyzers Page 143...
  • Page 145 (High or Low). Press Enter to toggle between Hi or Lo. Press to save your changes. To set the alarm to a digital output, see Programmable Digitals Output Assignments. ALARM DISPLAY ON/OFF → → → SERVOPRO NOx Analyzers Page 144...
  • Page 146 Programmed digital output alarms will not be affected by this setting; only the display will be turned off. The scrolling alarms will be replaced with the SERVOMEX phone number when an alarm is active. If there are no alarms, only the date and time will be displayed.
  • Page 147 SERVICE MENU → → NOTE: The Service Menu is for advanced operators and SERVOMEX Service. The Service menu provides access to operator-level linear coefficients and SERVOMEX factory service. From the Menus screen press to access the Service menu. Press to view or change operator-level linear coefficients.

  • Page 148: Service Menu

     To reset Factory Coefficients see Reset Factory Settings. Select the corresponding function key for the range you wish to edit. In the example, pressed to allow the Range 1 Linear Coefficient to be changed. SERVOPRO NOx Analyzers Page 147...
  • Page 149 FACTORY SERVICE → → → NOTE: The Factory Service menus can only be accessed by Servomex. The best way to contact SERVOMEX with a support question is contact the regional support at http://www.servomex.com/locations/. SERVOPRO NOx Analyzers Page 148...

  • Page 150: Security

    Standard Functions or advanced Setup Functions. Press to change the password that allows the operator access to the Setup Functions menu. Press to enter the master password that resets the Setup Functions password to the original factory setting. SERVOPRO NOx Analyzers Page 149...
  • Page 151 OPERATOR LEVELS → → → NOTE: The SERVOPRO NOx has three operator access levels which allow the operator to access different analyzer functions. From the Security Menu screen press to access the Operator Levels screen. See Menu Flow Chart for security levels and functions.
  • Page 152 Operator Levels screen. To change the password, press Enter to open the field. Enter a new 3-digit password. Press Enter again to close the field. Press to save the new password. RESET PASSWORD → → → SERVOPRO NOx Analyzers Page 151...
  • Page 153 I and so on. Repeat this procedure until you have finished entering WIZARD. Press Enter and the password for the Setup functions will be reset to 222. SERVOPRO NOx Analyzers Page 152...

  • Page 154: Communication And Interface

    The TCP/IP port allows the analyzer to be accessed via a network connection. The analyzer requires a static IP address that is settable from the Setup menu. Either AK or Modbus protocol can be used to access the analyzer remotely. ANALOG AND DIGITAL INTERFACE SERVOPRO NOx Analyzers Page 153...

  • Page 155: Analog And Digital Interface

    NOTE: All opto-isolated relays are rated for 48VDC, 0.5 Amp maximum. The user is required to limit the drive current supplied to each input. All inputs are DC only and will not operate on AC current. SERVOPRO NOx Analyzers Page 154...
  • Page 156 Digital Ground. 24VDC The 24DVC output is intended for use with properly rated solenoid valves. SERVOPRO NOx Analyzers Page 155...
  • Page 157 Auto Cal Digital Input Momentary Hold to Ground Calibrate Digital Input Momentary Hold to Ground Zero Digital Input Momentary Hold to Ground Span Digital Input Momentary Hold to Ground Sample Digital Input Momentary Hold to Ground SERVOPRO NOx Analyzers Page 156...
  • Page 158 Digital Output Uses Relay RTN 2 User-Defined NO Relay 8 Digital Output Uses Relay RTN 2 User-Defined NO Relay 9 Digital Output Uses Relay RTN 3 User-Defined NO Relay 10 Digital Output Uses Relay RTN 3 SERVOPRO NOx Analyzers Page 157...

  • Page 159: Serial Interface

    A 9-pin male connector at the back of the unit is used to connect a master computer with the following pin assignment: Pin 3 = Txd (transmit) Pin 2 = Rxd (receive) Pin 5 = Gnd (ground) Figure 0-1 Serial Interface INTERFACE SPECIFICATIONS SERVOPRO NOx Analyzers Page 158...
  • Page 160 1 byte, adjustable (e.g. 32) Parity: Even, odd, none XON/XOFF: Active or not active Hand Shake: ETHERNET RJ47 If connecting directly to a computer (without using a hub or switch), a crossover cable is required. SERVOPRO NOx Analyzers Page 159...

  • Page 161: Ak Protocol

    For Error Status, use the ASTF command. Example: Using Windows ® HyperTerminal for Serial RS232 Communications with SERVOMEX SERVOPRO NOx Analyzers requires: 1. HyperTerminal software 2. Windows PC/laptop 3. Null modem cable Setup procedure: run HyperTerminal and configure as shown:...
  • Page 162 AK commands will be acted on by the analyzer. The picture below shows a sequence with the AKON 0 command being sent to the analyzer. Sending the analyzer characters not framed as AK commands should be prevented as the menu could recognize these characters and cause unplanned changes in configuration. SERVOPRO NOx Analyzers Page 161...
  • Page 163 Ctrl C (at the same time) this will end the text. NOTE: The analyzer will reply with numbers. If you receive ???? try the sequence again. INSTRUCTION COMMAND Byte Character Explanation Byte ASCII Code 02 SERVOPRO NOx Analyzers Page 162...
  • Page 164 ACKNOWLEDGEMENT COMMAND Byte Character Explanation Byte ASCII Code 02 Byte Don’t Care Any ASCII code Byte Function Code 1 Echo of the AK instruction command Byte Function Code 2 Echo of the AK instruction command SERVOPRO NOx Analyzers Page 163...
  • Page 165 Same code as command package (e.g. ASTZ) Space Status 0 without error or 1 to 9 when error (see also ASTF command) Space 20H (only if followed by data, otherwise <ETX>) Data Parameter (depending on the command) <ETX> SERVOPRO NOx Analyzers Page 164...
  • Page 166 3. If the displayed value is not valid, a # symbol is placed in front of the measured value (for example, AIKG 0 #9999). 4. If a control or adjusting command is sent via the serial interface while the device is in Manual mode, it sends an answer like SLIN 0 K0 OF. SERVOPRO NOx Analyzers Page 165...
  • Page 167 Date of format year, month and day with 2 characters each and no spaces hhmmss Time of format hour, minute and second with 2 characters each and no spaces In general, AK commands are subdivided into three classes: SERVOPRO NOx Analyzers Page 166...
  • Page 168 (da), relative dev (dr). AAOG: Applied Offsets and Gains Command Response Description _AAOG_K0_ _AAOG_s_M1_z.z_y.y Offset and gain of ranges M1 to M4 and O _M2_z.z_y.y with O option. _M3_z.z_y.y z.z: Offset _M4_z.z_y.y y.y: Gain _O2_z.z_y.y SERVOPRO NOx Analyzers Page 167...
  • Page 169 9. EPC coil sample voltage percent 10. EPC coil air / ozone voltage percent 11. Reserved 12. Concentration 1 / Concentration 2 13. O detector temperature 14. Reserved 15. Reserved 16. O Concentration 1 / Concentration 2 SERVOPRO NOx Analyzers Page 168...
  • Page 170 AEMB: Get Measuring Range Command Response Description _AEMB_K0 _AEMB_s_Mn Current range n AENT: Query Calibration Gas Flow Settings (Pumps or Valves) Command Response Description _AENT_K0 _AENT_s_x Current calibration gas flow setting. x: 10 = Pump SERVOPRO NOx Analyzers Page 169...
  • Page 171 Polynomial coefficients of channel m Range n _AGRD_K1_M1 _AGRD_a0_a1_a2_a3_a4 coefficients with option AGRW: Max Absolute / Relative Deviation Limits Command Response Description _AGRW_K0_Mn _AGRW_s_z.z_y.y z: Absolute y: Relative for range n _AGRW_K1 _AGRW_s_z.z_y.y K1 O option AKAK: Calibration Gas Concentrations SERVOPRO NOx Analyzers Page 170...
  • Page 172 _AKEN_K2 _AKEN_s_serial no Device serial number _AKEN_K3 _AKEN_s_Air pressure Air pressure _AKEN_K4 _AKEN_s_Sample pressure Sample pressure AKON: Measured Concentration Value Command Response Description _AKON_K0 _AKON_s_z.z_y.y_x.x_t z.z : Current measured value SMAN y.y : NO concentration SERVOPRO NOx Analyzers Page 171...
  • Page 173 _AMBU_K0 _AMBU_s_M1_w.w_W.W Lower and upper range switchover value of auto _M2_x.x_X.X range. _M3_y.y_Y.Y _M4_z.z_Z.Z APAR: Auto Calibration Tolerance Values Command Response Description _APAR_K0_SATK _APAR_s_z.z_y.y_x.x_w.w Auto calibration tolerance value (%): z.z: Range 1 y.y: Range 2 SERVOPRO NOx Analyzers Page 172...
  • Page 174 = Timestamp (1/10 sec.). ASTF: Error Status Command Response Description _ASTF_K0 _ASTF_s_f1_f2_f3_...f25 Current error numbers are responded. 1. Check sample pressure 2. Check air pressure 3. Check oven temperature 4. Check converter temperature SERVOPRO NOx Analyzers Page 173...
  • Page 175 25. Dummy text for RTC time ASTZ: Normal Device Status Command Response Description _ASTZ_K0 _ASTZ_s_K1_State 1_State 2_. . State 5 Device statuses for all channels. Possible States Response Description State 1 SREM Remote SMAN Manual State 2 STBY Standby SERVOPRO NOx Analyzers Page 174...
  • Page 176 (each 2 characters wide, no spaces) AT90: Respond Low-pass Filter Time Command Response Description _AT90_K0 _AT90_s_t Low-pass filter time in seconds t = filter time in seconds SERVOPRO NOx Analyzers Page 175...
  • Page 177 _[<UDP_IP>]_[Data]_[On/Off] data in Hz Mode: A: ASCII Mode UDP_IP: alternative IP address open for the UDP connection when it should use the IP connected to the TCP/IP client. Data: Commands to be streamed over UDP. SERVOPRO NOx Analyzers Page 176...
  • Page 178 Sets auto range on SATK: Start Automatic Calibration Command Response Description _SATK_K0 _SATK_s Starts automatic calibration of all available ranges _ SATK_K0_Mn _SATK_s Starts automatic calibration of range n SEGA: Open Valve for Span Gas Calibration SERVOPRO NOx Analyzers Page 177...
  • Page 179 10 = Pump 11 = Valves SFGR: Reset Calibration Settings to factory defaults Command Response Description _SFGR_K0 _SFGR_s Resets all calibration settings to their factory settings SMAN: Manual Control to Control Device Manually Command Response Description SERVOPRO NOx Analyzers Page 178...
  • Page 180 Zero mode is active SPAU: Pause Command Response Description _SPAU_K0 _SPAU_s Sets Pause mode SREM: Remote Mode for AK Commands Command Response Description _SREM_K0 _SREM_s Sets analyzer in Remote mode SRES: Reset Command Response Description _SRES_K0 _SRES_s Reset SERVOPRO NOx Analyzers Page 179...
  • Page 181 _ SVZS_K1 _SVZS_s Sets O range offsets to 0 and gains to 1 CONFIGURATION COMMANDS EATK: Set Auto Calibration Parameters Command Response Description _EATK_K0_z_y_x _EATK_s_z_y_x z: 1) NO mode 2) NO mode y: 1) ALL gases SERVOPRO NOx Analyzers Page 180...
  • Page 182 14. Reserved 15. Reserved 16. O Concentration 1 / Concentration 2 _EDAL_K0_x_ _EDAL_s Sets alarm limit of x (x = 1-16) x.min_xmax EEFF: NO Offset and Correction Factor Command Response Description _EEFF_K0 _EEFF_s_z.z_y.y zz: NO offset SERVOPRO NOx Analyzers Page 181...
  • Page 183 Sets the absolute and relative deviations in %. z: Absolute y: Relative _EGRW_K1_Mn _EGRW_s_z_x K1 or option EKAK: Set the Four Span Gas Concentration Values Command Response Description _EKAK_K0_M1_ _EKAK_s Sets the NO span gas values w.w_M2_x.x_M3_ SERVOPRO NOx Analyzers Page 182...
  • Page 184 Auto calibration tolerance value (%): z.z_y.y_x.x_w.w z.z = Range 1 y.y = Range 2 x.x = Range 3 w.w = Range 4 ESYZ: Set System Time Command Response Description _ESYZ_K0_ _ESYZ_s Sets system time: yymmdd_hhmmss yymmdd: year, month, day SERVOPRO NOx Analyzers Page 183...
  • Page 185 Port: port for opening the UDP connection. Data Frequency: frequency for transmitting the data in Hz. Mode: A: ASCII mode (optional). UDP_IP: alternative IP address for opening the UDP connection when it should not be SERVOPRO NOx Analyzers Page 184...
  • Page 186 <data> is the AK four-character code followed by the answer. See corresponding AK command description. Example Sending “EUDP K0 7001 2 A – AKON_KO;ADUF_K0” will give the following streaming result: “123 AKON 4.07 901.33 22.50 3481639460 ADUF 4.30 4.59 4.45”, where 123 is the sequence number. SERVOPRO NOx Analyzers Page 185...
  • Page 187 The existence of explicit and implicit length rules and use of a CRC-32 error check code (on Ethernet) virtually eliminate the possibility of undetected corruption to a request or response message. SERVOPRO NOx Analyzers Page 186...

  • Page 188: Modbus Protocol

    Ethernet TCP-IP network and a Modbus serial line. This field is set by the Modbus client in the request and must be returned with the same value in the response by the server. All Modbus/TCP ADU are sent via TCP to Registered Port 502. SERVOPRO NOx Analyzers Page 187...
  • Page 189 The different fields are encoded in Big-endian. The SERVOPRO NOx analyzer uses only the Length bytes from the MBAP section. MODBUS COMMAND FUNCTION CODES CODE 01 This function code is used to read from 1 to 2000 contiguous status bits in a remote device.
  • Page 190 In the last data byte, the status of outputs 38-36 is shown as the byte value 05 hex, or binary 0000 0101. Output 38 is in the sixth bit position from the left, and output 36 is the LSB of this byte. The five remaining high-order bits are zero filled. SERVOPRO NOx Analyzers Page 189...
  • Page 191 Command 01, Read Coil 200 Count 1. Result = 01. SERVOPRO NOx Analyzers Page 190...
  • Page 192 0x03 2 x N* Byte Count 1 Byte Register Value N* x 2 Bytes *N = Quantity of Registers EXAMPLE: Request to read Register 0: Request Response Field Name (Hex) Field Name (Hex) Function Function SERVOPRO NOx Analyzers Page 191...
  • Page 193 The contents of register 40201 are shown as the four byte values of 41 8F 33 33 hex, or 17.9 decimal. EXAMPLE: Request to read Three Registers Starting at 40201: Request Response Field Name (Hex) Field Name (Hex) Function Function Starting Address Hi Byte Count SERVOPRO NOx Analyzers Page 192...
  • Page 194 Register Value Hi (40203) Register Value Lo (40203) Register Value Hi (40206) Register Value Lo (40206) Register Value Hi (40205) Register Value Lo (40205) Command 03, Read Floating Point value from Address 1. Result = 1234.56789. SERVOPRO NOx Analyzers Page 193...
  • Page 195 For each register, the first byte contains the high-order bits and the second byte contains the low-order bits. Request Function Code 1 Byte 0x04 Starting Address 2 Bytes 0x0000 to 0xFFFF SERVOPRO NOx Analyzers Page 194...
  • Page 196 Input Register 9 Hi Quantity of Input Registers Hi Input Register 9 Lo Quantity of Input Registers Lo The contents of Input Register 8 are shown as the two-byte values of 00 0A hex, or 10 decimal. SERVOPRO NOx Analyzers Page 195...
  • Page 197 All other values are illegal and will not affect the bit. The normal response is an echo of the request, returned after the bit state has been written. Request SERVOPRO NOx Analyzers Page 196...
  • Page 198 EXAMPLE: Request to write bit 173 ON: Request Response Field Name (Hex) Field Name (Hex) Function Function Output Address Hi Output Address Hi Output Address Lo Output Address Lo Output Value Hi Output Value Hi Output Value Lo Output Value Lo SERVOPRO NOx Analyzers Page 197...
  • Page 199 PDU specifies the address of the register to be written. Registers are addressed starting at zero. Therefore the register numbered 1 is addressed as 0. The normal response is an echo of the request, returned after the register contents have been written. Request Function Code 1 Byte 0x06 SERVOPRO NOx Analyzers Page 198...
  • Page 200 EXAMPLE: Request to write Register 1 to 00 03 hex: Request Response Field Name (Hex) Field Name (Hex) Function Function Register Address Hi Register Address Hi Register Address Lo Register Address Lo Register Value Hi Register Value Hi Register Value Lo Register Value Lo SERVOPRO NOx Analyzers Page 199...
  • Page 201 The analyzer ignores the numbers in the register and byte count and expects four data bytes. Request Function Code 1 Byte 0x10 Starting Address 2 Bytes 0x0000 to 0xFFFF Quantity of Registers 2 Bytes Byte Count 1 Byte SERVOPRO NOx Analyzers Page 200...
  • Page 202 Starting Address Lo Starting Address Lo Quantity of Registers Hi Quantity of Registers Hi Quantity of Registers Lo Quantity of Registers Lo Byte Count Registers Value Hi Registers Value Lo Registers Value Hi Registers Value Lo SERVOPRO NOx Analyzers Page 201...
  • Page 203 Command 16, Write one floating point register. SERVOPRO NOx Analyzers Page 202...
  • Page 204 NOTE: This is a non-standard code used to read an ASCII string. Request Function Code 1 Byte 0x1A Starting Address 2 Bytes 0x0000 to 0xFFFF Quantity of Registers 2 Bytes Response Function Code 1 Byte 0x1A Length of String 1 Byte 0x00 to 0x7D SERVOPRO NOx Analyzers Page 203...
  • Page 205 String N Bytes Data Command 26, Read ASCII string from Address 0. SERVOPRO NOx Analyzers Page 204...
  • Page 206 Sample EPC voltage Air EPC voltage Range overflow ADC overflow ADC underflow Range 1 calibration error Range 2 calibration error Range 3 calibration error Range 4 calibration error Reaction chamber pressure (with option) Low concentration SERVOPRO NOx Analyzers Page 205...
  • Page 207 Wet mode (with option) Dry mode (with option) 05H WRITE SINGLE COIL NOTE: Modbus Commands Use TCP/IP Port 502. (Do not change TCP/IP port from 7700.) Coil Numbers and Descriptions Coil Number Write Data SERVOPRO NOx Analyzers Page 206...
  • Page 208 1 – Sets to Range 2 1 – Sets to Range 3 1 – Sets to Range 4 Sets NO mode Sets NO mode Sets NO/NO mode Sets Wet mode (with option) Sets Dry mode (with option) SERVOPRO NOx Analyzers Page 207...
  • Page 209 Converter temperature 40039 Pump temperature 40041 Diode temperature 40043 Cell temperature 40045 Gas dryer temperature (with option) 40047 temperature (with option) 40049 Sample EPC coil voltage 40051 Air EPC coil voltage 40061 Range 1 offset SERVOPRO NOx Analyzers Page 208...
  • Page 210 40207 Range 4 span gas concentration 40209 span gas concentration 40227 Sample pressure alarm minimum 40229 Sample pressure alarm maximum 40231 Air pressure alarm minimum 40233 Air pressure alarm maximum 40235 Oven temperature alarm minimum SERVOPRO NOx Analyzers Page 209...
  • Page 211 16H WRITE FLOATING POINT NOTE: Modbus Commands Use TCP/IP Port 502. (Do not change TCP/IP port from 7700.) Register Numbers and Descriptions Register Number Contents IEEE 40201 Range 1 span gas concentration 40203 Range 2 span gas concentration SERVOPRO NOx Analyzers Page 210...
  • Page 212 Sample EPC voltage alarm maximum 40263 Air EPC voltage alarm minimum 40265 Air EPC voltage alarm maximum 40267 detector temperature alarm minimum 40269 detector temperature alarm maximum 40287 Sample concentration alarm minimum 40289 Sample Concentration alarm maximum SERVOPRO NOx Analyzers Page 211...

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