CAI 700 LX Series Operator's Manual
  1. Manuals
  2. Brands
  3. CAI Manuals
  4. Measuring Instruments
  5. 700 LX Series
  6. Operator's manual

CAI 700 LX Series Operator's Manual

Hfid analyzer
Hide thumbs
Table of Contents

Advertisement

Quick Links

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the 700 LX Series and is the answer not in the manual?

Questions and answers

Rob
May 9, 2025

Epc voltages in alarm high, had a bad vac pump and replaced, want to if this will go down as the unit gets real air flow

User image 681e7a2979aef
0
1 comments:
Mr. Anderson
May 20, 2025

Yes, the EPC voltages in alarm high for the CAI 700 LX Series may decrease after replacing the bad vacuum pump, as real air flow is restored. The EPC voltage represents the percentage of voltage supplied to control pressure, which is affected by air flow. Restoring proper air flow can normalize pressures, potentially lowering the EPC voltages back within normal alarm limits.

This answer is automatically generated

0

Related Manuals for CAI 700 LX Series

Summary of Contents for CAI 700 LX Series

  • Page 2: Table Of Contents

    700LX HFID 12-31-2021 Table of Contents Introduction ........................... 5 Analyzer Specifications ........................9 Installation ........................... 11 Safety Information ........................... 11 Safety Information - service and repair ..................13 Startup and Shutdown ......................23 Using the Keypad ........................25 Menu Flow Chart ......................... 27 Main Menu ...........................
  • Page 3 700LX HFID 12-31-2021 Range Limits ..........................83 AutoRange On/Off........................85 AutoRange Switch Points ......................86 Diagnostics ............................87 Diagnostic Values ........................88 Raw Values Display ........................ 90 I/O Status ..........................92 Analyzer Digital Outputs ...................... 93 Analyzer Digital Inputs ......................94 Programmable Digital Outputs .....................
  • Page 4 700LX HFID 12-31-2021 Serial Interface ..........................149 AK Protocol ............................ 150 Instruction Command ......................152 Error Handling ........................154 General AK Requirements ..................... 155 Scan Commands ......................... 157 Control Commands ......................167 Configuration Commands ....................170 Modbus Protocol ..........................175 MBAP Description ........................

  • Page 5: Introduction

    12-31-2021 Introduction Thank you for purchasing the CAI 700LX HFID Analyzer. Before using the 700LX HFID, please familiarize yourself with its operation by reading this manual. If you have any questions, please do not hesitate to call California Analytical Instruments Technical Support for assistance.
  • Page 6 700LX HFID 12-31-2021 Features Measures THC from 1 to 30,000 ppmc full-scale. • • Heated version for maximum stability and “hot/wet” sampling. • Temperature-stabilized detector. • Electronic flow control. • Selectable analog output options of current or 1, 5 or 10 VDC. •...
  • Page 7 12-31-2021 Operating Principle The CAI 700LX HFID total hydrocarbon analyzer uses the principle of Flame Ionization Detection (FID) to determine the hydrocarbons within a gaseous sample. A heated oven (191°C) contains a burner and an optional heated sample pump. The small flame of the burner is elevated and sustained by the regulated flows of air and either pure hydrogen or a 40/60 mixture of hydrogen and helium.
  • Page 8 700LX HFID 12-31-2021 Flow System Combustion air and fuel used by the instrument are controlled by an Electronic Proportional Control (EPC) valve whose function is to maintain a constant pressure for combustion air at the inlet to a capillary. The pressure is factory-set for optimum analyzer performance. NOTE: The correct pressures are determined by the factory for optimal analyzer performance and measured with NIST traceable standards.

  • Page 9: Analyzer Specifications

    /He fuel) Effect: Less than 1.2 to propane Flow Control: Electronic proportional pressure controller Sample Flow Rate: Typically 2.0 to 2.5 LPM (consult CAI for other flow rates) Fuel Requirements: 40% H /60% He (140cc/min) or 100% H (60cc/min) specify at time of order.
  • Page 10 700LX HFID 12-31-2021 Ignition: Local, remote or automatic Sample Temperature: Up to 191°C, non-condensing Oven Temperature: 191°C Ambient Temperature: 5 to 40°C Ambient Humidity: Less than 90% RH (non-condensing) Warm-up Time: 1 hour (typical) Fittings: ¼-inch tube Power Requirements: 115 VAC/60 Hz or 230 VAC/50 Hz ± 10%, 750 Watts max. Dimensions: 5¼”...

  • Page 11: Installation

    700LX HFID 12-31-2021 Installation Safety Information Safety Alert Temperature Hazard Electrical Shock Hazard Caution or Warning Caution or Warning Caution or Warning Note, Caution and Warning symbols appear on the instrument and in this manual to draw your attention to important operational and safety information. A “NOTE”...
  • Page 12 700LX HFID 12-31-2021 symbol (a lightning bolt in a triangle) precedes an electrical shock hazard CAUTION or WARNING statement. 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.

  • Page 13: Safety Information - Service And Repair

    12-31-2021 Fuel Requirements The CAI factory configures the 700LX HFID analyzer for either 100% Hydrogen or 40%/60% Hydrogen/Helium fuel. Please make sure to use the correct fuel as specified on the fuel label affixed to the back panel of the analyzer.
  • Page 14 700LX HFID 12-31-2021 Gas connections both interior and exterior at rear panel. All gas connections must be checked for leaks with a certified leak checking device. Oven: There are valves and a pump head that penetrate the oven wall. These parts at the exterior wall range in temperature from 60°C to 70°C.
  • Page 15 IMPORTANT: You should save the original shipping container your analyzer arrives in. The shipping container and packaging are specially designed to protect the analyzer in transport. If you ever need to return the analyzer to CAI for repair or any other reason, the original shipping container and packaging should be used.
  • Page 16 700LX HFID 12-31-2021 Rack Mounting The front panel is designed for mounting into a standard 19-inch rack enclosure. Holes are located on the left and right side to allow the panel to be secured in the rack by screws. Optional rack slides allow the analyzer to be pulled out of the rack enclosure for access.
  • Page 17 700LX HFID 12-31-2021 Site Selection and Mounting CAUTION: The following precautions must be carefully observed: 1. Select a site free from direct sunlight, radiation from a high-temperature surface, or abrupt temperature variations. 2. This analyzer is not suitable for installation outdoors. 3.
  • Page 18 700LX HFID 12-31-2021 Electrical All wiring is connected at the rear of the analyzer. The AC power cord is connected to the power entry as shown below: Fuse Panel Power ON/OFF Switch Power Entry AC Power Switch, Connector and Fuse. NOTE: A defective ground may affect the analyzer’s operation.
  • Page 19 700LX HFID 12-31-2021 7. Heated sample line. Calibration gases can be introduced through either the calibration ports on the back of the analyzer (if optional solenoid valves have been installed) or through the sample inlet. Gases introduced through a calibration port should be at 20-25 PSIG. If introduced through the sample port, pressures should be as follows: Without sample pump, pressure should be 10-25 PSIG.
  • Page 20 700LX HFID 12-31-2021 adequate precautions should be taken to eliminate the possibility of ‘cold spots’ between the end of the heated sample line and the inlet of the analyzer.
  • Page 21 700LX HFID 12-31-2021 Sampling Requirements Filtration The 700LX HFID contains an internal 0.01-micron filter in the sample input. It also has 10 micron filters on each of the air, fuel and optional zero/span gas solenoid valves. The final filter must be capable of removing any particles larger than 4 microns. Condensation The analyzer is designed to measure hot wet (raw) sample gases.
  • Page 22 700LX HFID 12-31-2021 If the analyzer does not contain the optional internal sample pump, the sample gas entering the instrument should be between 8 and 25 PSIG with a minimum flow capacity of 3 liters/min. If the analyzer does contain the optional sample pump, DO NOT pressurize sample inlet. CAUTION: If the analyzer contains an optional internal sample pump, the introduction of a sample gas with pressure in excess of 2.0 PSIG will damage the pump.

  • Page 23: Startup And Shutdown

    Turn on the Power switch on the analyzer’s rear panel. After the analyzer is turned on, it needs at least 30 seconds for initialization. After a short delay, the digital display should illuminate. If the display does not come on, check the power source and the fuse. If the problem persists, call CAI Technical Support.
  • Page 24 700LX HFID 12-31-2021 Proper Storage After power down, allow the heated analyzer components to cool to room temperature before preparing for storage. If the original shipping box was retained, the analyzer should be stored in the box in the packing material supplied.

  • Page 25: Using The Keypad

    700LX HFID 12-31-2021 Using the Keypad When the Measure screen is displayed, the ten Function keys (F1 through F10) are shortcuts to commonly used screens. On other screens, these keys can either be used as function keys or to enter numeric values. This is why each number key includes both the larger Function number at the top (for example, F1) and the smaller number underneath for numeric value (for example, The light key is used to turn the display’s backlight on and off.
  • Page 26 700LX HFID 12-31-2021 From any screen, the Measure key takes you to the Measure screen. The current measurement is being displayed. The Enter key: 1. In Function mode, the Enter key selects the highlighted function. 2. When a field is highlighted for numeric input, pressing the Enter key opens the selected field for numeric entry with a blinking cursor.

  • Page 27: 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 CAI System 700LX HFID Analyzer. Start by pressing to access the Main Menu to quickly find any screen.
  • Page 28 700LX HFID 12-31-2021 Calibration Menu Main Menu Menus Calibration Manual Automated Cal Gas Calibration Calibration Reset Factory Calibration Calibration Concentration Setup Factors Settings Initiate Manual Auto Cal Reset Zero Sequenced Cal Deviations Schedule Offset and Gain Zero Gas Initiate Span Auto Cal Deviations Reset Linear...
  • Page 29 700LX HFID 12-31-2021 Range Setup Menu Main Menu Menus Range Setup AutoRange AutoRange Range Limits On/Off Switch Points AutoRange On AutoRange Off Security Level Legend Security Level 1 STANDARD Security Level 2 SETUP Security Level 3 FACTORY...
  • Page 30 700LX HFID 12-31-2021 Diagnostics Menu Main Menu Menus Diagnostics Diagnostic Raw Value I/O Status Status Line Values Display ← Temps → Analyzer Digital Turn Status Line Outputs ← Press → ← → ← Flows → Analyzer Digital Turn Status Line Inputs Programmable Digital Outputs...
  • Page 31 700LX HFID 12-31-2021 Setup Menu Main Menu Menus Setup Data Logging Auto Start Measure Output TCP/IP Clock Time Settings Settings Parameters Settings Averaging Programmable Programmable Time Analogs Digitals Output Output Output Output Readout Assignments Assignments Hold/Clear Test C1 or C3 Output Hold Scaling...
  • Page 32 700LX HFID 12-31-2021 Alarms 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 Security Level Legend Security Level 1 STANDARD Security Level 2 SETUP Security Level 3...
  • Page 33 700LX HFID 12-31-2021 Service Menu Main Menu Menus Service Linear Service Menu Coefficients Temperature Set Range 1 Point Pressure Set Range 2 Point Range 3 Amplifier Range 4 Security Level Legend Security Level 1 STANDARD Security Level 2 SETUP Security Level 3 FACTORY...
  • Page 34 700LX HFID 12-31-2021 Security Menu Main Menu Menus Security Operator Levels Reset Password Change Password Standard Functions Setup Functions Factory Functions Security Level Legend Security Level 1 STANDARD Security Level 2 SETUP Security Level 3 FACTORY...

  • Page 35: Main Menu

    700LX HFID 12-31-2021 Main Menu The Main Menu is your gateway to operational, setup and maintenance functions on the 700LX HFID analyzer via the corresponding function keys. All software functions of the 700LX HFID analyzer can be reached via the menu above from the Main Menu screen. Operation starts by pressing the Menu key to bring up the Main Menu.

  • Page 36: Measure Screen

    700LX HFID 12-31-2021 Measure Screen Screen Name Current Range AK Status Line Measured Concentration Second Log On Analyzer Mode Shortcut Menu Range Limit Current Time & Active Alarms Keypad Status The Measure Screen provides a visual of the current concentration of the gas being analyzed, along with other pertinent information.
  • Page 37 700LX HFID 12-31-2021 Screen Name: The name of the active screen the Analyzer is in; in this case the Measure screen. Second Log On: SEC appears when the second log is enabled. See Data Logging Time. AK Status Line: When the AK Status line is enabled, it will scroll through the analyzer’s present state using AK Protocol.
  • Page 38 700LX HFID 12-31-2021 Diags Diagnostic Values is used to view Temperatures, Pressures, EPC Percent Full Scale and Flows. Auto Range Allows operators to turn Auto Range On or Off. Manual Cal The Manual Calibration menu allows operators to Zero or Span the analyzer. Menus The Menus screen is the starting point for advanced setup and functions.

  • Page 39: Measure Mode

    700LX HFID 12-31-2021 Measure Mode → → The Measure Mode menu is used to select the Total Hydrocarbon (THC) measurement mode. The Measure Mode menu is accessed by pressing the key on the Main Menu. This menu will affect how the analyzer operates and what is displayed in the Measure screen. Press to set the analyzer in THC only mode.

  • Page 40: Analyzer Info

    This screen includes the Model and Serial Number of your analyzer (for easy identification if you are discussing your analyzer with CAI), factory settings for Sample pressure, Fuel pressure and Air pressure, and the software versions being used. The analyzer’s current IP address...

  • Page 41: Remote/Manual

    700LX HFID 12-31-2021 Remote/Manual → The Remote/Manual menu gives the operator the ability to control the instrument manually using the keypad or via a remote computer. The Remote/Manual menu is accessed by pressing the key on the Main Menu. The current setting (Remote Mode) is displayed in the upper right-hand corner of the screen.

  • Page 42: Standby

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

  • Page 43: Ignition

    700LX HFID 12-31-2021 Ignition → Before Ignition is attempted, the oven temperature should be a minimum of 120° C. To start the ignition sequence, press from the Main Menu. At the start of the ignition sequence the fuel valve will open five seconds before the air valve to prime the burner.

  • Page 44: Menus

    700LX HFID 12-31-2021 Menus → → The Menus screen provides access to most instrument features, including Calibration, Setup and Diagnostics. From the Main Menu press to bring up the Menus screen. Press to access the Calibration menus. Press to access the Range Setup menu. Press to access the Diagnostics menus.

  • Page 45: Calibration

    700LX HFID 12-31-2021 Calibration → → The 700LX HFID 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 46: Manual Calibration

    700LX HFID 12-31-2021 Manual Calibration → → → → Whether you are calibrating a single range or multiple ranges, each range requires its own complete zero and span calibration. If you are calibrating multiple ranges during one session, the zero calibrations can all be performed before any of the span calibrations, as long as they are within the same relatively short time period.

  • Page 47: Zero

    700LX HFID 12-31-2021 Zero → → → → Zero calibration should be performed before a span calibration. From the Manual Calibration menu press to access the Manual Zero Calibration screen. Make sure the analyzer is in the range you wish to calibrate. Use the Up/Down arrows to go to the desired range.
  • Page 48 700LX HFID 12-31-2021 When the concentration value has stabilized, press to set the zero calibration. The zero portion of the calibration should now be complete. If the calibration was successful, the screen will say ***Saved Current*** above the concentration value. Example of a successful calibration.
  • Page 49 700LX HFID 12-31-2021 If the zero calibration is unsuccessful, check the following: 1. Make sure the correct gas was introduced into the analyzer. 2. Verify the Diagnostic Values while flowing gas. 3. Check Zero Gas Deviations under Manual Deviations: → →...

  • Page 50: Span

    700LX HFID 12-31-2021 Span → → → → A span calibration should be performed after a successful zero calibration. From the Manual Calibration menu press to access the Manual Span Calibration screen. Make sure the highlighted span gas value (see above) matches the value on the certificate for the span calibration gas being supplied to the analyzer.
  • Page 51 700LX HFID 12-31-2021 When the concentration number has stabilized, press to set the span calibration. The calibration should now be complete. If the span calibration was successful, the screen will say ***Saved Current***. If the calibration was unsuccessful, the screen will say Outside Deviation Limits. See the Manual Zero Calibration section for examples of screens showing successful and unsuccessful calibrations.

  • Page 52: Automated Calibration

    700LX HFID 12-31-2021 Automated Calibration → → → An automated calibration is a timed zero calibration immediately followed by a timed span calibration. The Automated Calibration menu offers two choices: Sequenced Calibration and Sequenced Check of the existing calibration. The Automated Calibration menu is accessed by pressing from the Calibration menu.
  • Page 53 700LX HFID 12-31-2021 • This automated calibration is triggered manually and not by the analyzer’s clock or via remote signal. A fully automated sequenced calibration can be preset to include the desired interval for recurring analyzer-initiated calibrations. This requires additional setup.

  • Page 54: Initiate Sequenced Cal

    700LX HFID 12-31-2021 Initiate Sequenced Cal → → → → Current Concentration Analyzer Mode Expected Span Concentration Countdown Timer Current Date and Time Current Status Because of timing requirements, sequenced calibrations are generally only used when the analyzer is controlling the flow of zero and span gases into the analyzer. To initiate a sequenced calibration, press from the Automated Calibration menu.
  • Page 55 700LX HFID 12-31-2021 1. Zero Range 1 Purging – Allows time for the zero gas to flush out any residual gases that may still be present in the detection path. 2. Zero Range 1 Calibrating – The calculated averaged zero is set as the new offset value, as long as it is within the Maximum Calibration Error limits.

  • Page 56: Initiate Sequenced Check

    700LX HFID 12-31-2021 Initiate Sequenced Check → → → → Initiate Sequenced Check is a useful tool for setting up Auto Calibration. From the Auto Calibration Menu screen, pressing initiates a sequenced calibration check. 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...

  • Page 57: Cal Gas Concentrations

    700LX HFID 12-31-2021 Cal Gas Concentrations → → → → The Cal Gas Concentrations Screen allows operators to change calibration gas values for multiple ranges on one screen. To access the Cal Gas Concentrations screen (shown above) press from the Calibration Menu. The Cal Gas Concentrations screen displays the range identification, the changeable span gas value and the full-scale value set for that range.

  • Page 58: Calibration Setup

    700LX HFID 12-31-2021 Calibration Setup → → → The Calibration Setup menu provides all the parameters necessary for completing a successful calibration. To access the Calibration Setup menu, select from the Calibration menu. All parameters on the Calibration Setup menu apply to Automated Calibration. The following also apply to Manual Calibration: Cal Pump/Valves, Auto Cal/Check, Deviation Limits and Analog Hold on Cal.

  • Page 59: Auto Calibration Schedule

    700LX HFID 12-31-2021 Auto Calibration Schedule → → → → Next Scheduled Scheduled Screen Name Calibration Time and Date Calibration Interval Save Hourly, Daily or Current Date and AutoCal On / Off Weekly Time The Auto Calibration Schedule screen allows the operator to run automated calibrations using the analyzer’s internal clock.
  • Page 60 700LX HFID 12-31-2021 After all the changes have been made, you must choose one of the following: (Hourly), (Daily) or (Weekly) to save your changes. If this is not done, the selected changes will not be made and the analyzer will revert to the previous settings. To change Timed Auto Calibration to on or off, press (Timed Cal On/Off).

  • Page 61: Auto Calibration Parameters

    700LX HFID 12-31-2021 Auto Calibration Parameters → → → → Auto Calibration Parameters allows the operator to select the range, mode and choose between Zero and All calibration gases (both zero and span). To access the AutoCal Parameter screen, press from the Calibration Setup menu.
  • Page 62 700LX HFID 12-31-2021 Calibration Gases gives you a choice of calibrating with Zero gas only or All calibration gases (zero and span gases). Press to open the field and change the parameter using the up or down arrows . Press to close the field.

  • Page 63: Calibration Via Pump/Valves

    700LX HFID 12-31-2021 Calibration Via Pump/Valves → → → → The use of Cal via Pump/Valves depends upon how calibration gases are being introduced into the analyzer – via a sample pump or internal valves (if equipped with internal valve option).

  • Page 64: Auto Calibration/Check

    700LX HFID 12-31-2021 Auto Calibration/Check → → → → Auto Calibration/Check lets the operator select whether the analyzer actually calibrates, or performs a check of the calibration. To access the Auto Cal/Check menu, press from the Calibration Setup menu. The current setting is shown on the upper right corner of the screen. Press to set the analyzer parameter to Calibrate.

  • Page 65: Auto Calibration Timing

    700LX HFID 12-31-2021 Auto Calibration Timing → → → → Auto Calibration Timing determines the length of time it takes the analyzer to perform the Zero and Span cycles during a sequenced auto calibration. To access the AutoCal Timing screen, press from the Calibration Setup menu.
  • Page 66 700LX HFID 12-31-2021 2. Calibrating Time: during this 10-second time, the analyzer will calculate new offset and gain factors. The calibrating time is factory-set at 10 seconds and cannot be changed by the operator. 3. Verifying Time: during this time the measured value is checked to make sure it does not deviate outside the upper or lower limit specified by the Maximum Verifying Error.

  • Page 67: Deviation Limits

    700LX HFID 12-31-2021 Deviation Limits → → → → Deviation Limits are used by the operator to define the maximum acceptable error limits of the zero and span gases for both manual and sequenced calibration. To access the Deviation Limits menu, press from the Calibration Setup menu.

  • Page 68: Maximum Calibration Error

    700LX HFID 12-31-2021 Maximum Calibration Error → → → → → Maximum Calibration Error is used by the operator to define the maximum acceptable tolerances for Absolute and Relative deviations. Each range has its own set of Absolute and Relative tolerances. The deviations must be inside these tolerances to accept a calibration. To access the Maximum Calibration Error screen, press from the Deviation Limits menu.

  • Page 69: Maximum Verifying Error

    700LX HFID 12-31-2021 Maximum Verifying Error → → → → → Maximum Verifying Error is the allowable tolerance during the Verifying step of sequenced calibration. To access the Maximum Verifying Error screen press from the Deviation Limits menu. To set the allowable tolerances for different ranges, use the up or down arrow move the highlight to the field you intend to change.

  • Page 70: Analog Hold On Cal

    700LX HFID 12-31-2021 Analog Hold on Cal → → → → Analog Hold on Cal will hold the analog outputs to the last measured value during calibration. If Analog Hold on Cal is Off the analog outputs will be live. The existing setting (Off) is shown at the top right of the menu.

  • Page 71: Calibration Factors

    700LX HFID 12-31-2021 Calibration Factors → → → Calibration Factors allow the operator to track and view changes from the factory and previous calibrations. 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.

  • Page 72: Manual Deviations

    700LX HFID 12-31-2021 Manual Deviations → → → → 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.

  • Page 73: Zero Gas Deviations

    700LX HFID 12-31-2021 Zero Gas Deviations → → → → → Press from the Manual Deviations menu to view the Zero Gas Deviations screen. 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.
  • Page 74 700LX HFID 12-31-2021 → → → → → Press from the Manual Deviations menu to view the Span Gas Deviations screen. 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.

  • Page 75: Auto Cal Deviations

    700LX HFID 12-31-2021 Auto Cal Deviations → → → → The Auto Calibration Deviations menu gives the operator a choice of viewing either zero or span verifying deviations. 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.

  • Page 76: Verifying Zero Deviations

    700LX HFID 12-31-2021 Verifying Zero Deviations → → → → → Press from the Auto Cal Deviations menu to view the Verifying Zero Deviations screen. 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.

  • Page 77: Verifying Span Deviations

    700LX HFID 12-31-2021 Verifying Span Deviations → → → → → Press from the Auto Cal Deviations menu to view the Verifying Span Deviations screen. 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.

  • Page 78: Offset/Gain Factors

    700LX HFID 12-31-2021 Offset/Gain Factors → → → → When used in conjunction with the Manual Calibration Deviations, an increasing or decreasing change in Offset or Gain will provide insight into changes in analyzer performance. Press from the Calibration Factors menu to access the Offset/Gain Factors screen.

  • Page 79: Reset Factory Settings

    700LX HFID 12-31-2021 Reset Factory Settings → → → The Reset Factory Settings menu gives the operator a choice of resetting the Offsets and Gains, or 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.
  • Page 80 700LX HFID 12-31-2021 Reset Offsets and Gains → → → → Pressing from the Reset Factory Settings menu will prompt the operator to confirm resetting Offsets and Gains for all ranges. Pressing (Yes) from this screen resets the Offset and Gain factors to factory default settings (0 and 1 respectively) and brings you to this confirmation screen: •...
  • Page 81 700LX HFID 12-31-2021 Reset Linear Coefficients → → → → Pressing from the Reset Factory Settings menu will prompt the operator to confirm resetting the Linear Coefficients for all ranges. Pressing (Yes) from this screen resets all the Linear Coefficients and Offset and Gain 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.

  • Page 82: Range Setup

    700LX HFID 12-31-2021 Range Setup → → Range Setup allows the operator to change Range Limits, turn AutoRange On or Off, and change AutoRange Switch Points. From the Menus screen press to access the Range Setup menu. Press to view or change Range Limits. Press to access the AutoRange On/Off menu.

  • Page 83: Range Limits

    700LX HFID 12-31-2021 Range Limits → → → → The analyzer is factory-configured with four physical ranges (1 - 4). The operator can change the number of ranges and select a specific full-scale concentration in ppm. From the Range Setup menu press to access the Range Limits screen.
  • Page 84 700LX HFID 12-31-2021 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 AutoRange Switch Points will be set to default percentages of range limits.

  • Page 85: Autorange On/Off

    700LX HFID 12-31-2021 AutoRange On/Off → → → → The Auto Range Function allows the analyzer to automatically switch up and down between ranges at predetermined concentrations. From the Range Setup menu press access the Auto Range On/Off screen. The current Auto Range status appears in the upper-right corner of the screen.

  • Page 86: Autorange Switch Points

    700LX HFID 12-31-2021 AutoRange Switch Points → → → AutoRange Switch Points determine when the analyzer automatically changes a range up or down when the AutoRange function is turned on. From the Range Setup menu press to access the AutoRange Switch Points screen. The Default Switch Points are created by the range limits.

  • Page 87: Diagnostics

    700LX HFID 12-31-2021 Diagnostics → → The Diagnostics menu allows the operator to access key troubleshooting screens including Diagnostic Values, Raw Values and Input/Output statuses. From the Menus screen press to access the Diagnostics menu. Press to access the Diagnostics Values screen. It allows you to check analyzer temperatures, pressures, EPC voltage percentages and flows.

  • Page 88: Diagnostic Values

    700LX HFID 12-31-2021 Diagnostic Values → → → → Temperatures Screen The Diagnostic Values screens allow the operator to check analyzer temperatures, sample and air pressures, EPC voltage percentages and flows. These important screens are accessed by pressing from the Diagnostics menu. The first screen that appears is the Temperatures screen.
  • Page 89 700LX HFID 12-31-2021 Pressures Screen 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. Flows Screen The Flows screen displays the current flow of sample and air in mL/minute.

  • Page 90: Raw Values Display

    700LX HFID 12-31-2021 Raw Values Display → → → → The Raw Values Display screen is a diagnostic tool for viewing detector Raw Volts and Calculated Concentrations. This screen is accessed by pressing from the Diagnostics menu. Raw Voltage: This is a 0.512 VDC to 4.512 VDC that will be digitized by the microprocessor to generate the calibration curve from which the Raw Concentration and Measured Concentration are derived.
  • Page 91 700LX HFID 12-31-2021 From the Raw Values Display screen, the following functions can be useful for diagnosing and monitoring the analyzer’s performance: to change the analyzer’s mode to THC or CH Press (Methane option only). The current mode is indicated after the ellipsis (…). Example: Mode. . . THC. Press to access the Current Alarms...

  • Page 92: I/O Status

    700LX HFID 12-31-2021 I/O Status → → → The I/O Status menu gives the operator a choice of viewing the statuses of the analyzer’s digital outputs or digital inputs (open or closed). To access the I/O Status menu, press from the Diagnostics menu. Press to view the status of the analyzer’s standard digital outputs.

  • Page 93: Analyzer Digital Outputs

    700LX HFID 12-31-2021 Analyzer Digital Outputs → → → → The Analyzer Digital Outputs screen allows the operator to view the status of an analyzer output (Open or Closed) and where to find the corresponding pin number. To access the Analyzer Digital Outputs status screen, press from the I/O Status menu.

  • Page 94: Analyzer Digital Inputs

    Number on that connector. The abbreviations are as follows: M = Main Connector A = Auxiliary Int = internal, for CAI 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 95: Programmable Digital Outputs

    700LX HFID 12-31-2021 Programmable Digital Outputs → → → → The Programmable Digital Outputs screen allows the operator to check the status of the analyzer’s programmable digital outputs (Open or Closed) according to pin numbers and programmed functions. From the I/O Status menu press to view the statuses of the Programmable Digital Outputs.

  • Page 96: Status Line

    700LX HFID 12-31-2021 Status Line → → → The AK Command Status Line can be displayed at the top of the Measure Screen. This field contains the current AK Protocol information. See Protocol. The current status is shown in the upper-right corner of the Status Line menu. Example above: OFF. From the Diagnostics menu, Press to select On or Off.

  • Page 97: Setup Menu

    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 CAI 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 98: Measure Settings

    700LX HFID 12-31-2021 Measure Settings → → → The Measure Settings menu provides access to the analyzer’s Averaging Time and the ability to change the analyzers readout. The Measure Settings menu is accessed by pressing from the Setup menu. Press to view or change the Averaging Time of the measured concentration of THC.

  • Page 99: Averaging Time

    700LX HFID 12-31-2021 Averaging Time → → → → 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. Press to open the field to change the time.

  • Page 100: Readout (C1 Or C3)

    Note: If the analyzer was ordered with non standard factory ranges other than shown above (C1 or C3) this function should not be used without consulting a CAI representative. If the Maximum Range Limit shown in the Range Limits screen is equal to 10,000 or 30,000 ppm it has standard factory →...

  • Page 101: Output Settings

    700LX HFID 12-31-2021 Output Settings → → → The Output Settings menu allows the operator to change the analyzer’s Programmable Analog and Programmable Digital outputs to suit the operator’s needs. The Output Settings menu is accessed by pressing from the Setup menu. Press to see the Programmable Analogs menu, which allows the operator to view or change the analog Output Assignments, Output Scaling or make Output Adjustments.

  • Page 102: Programmable Analogs

    700LX HFID 12-31-2021 Programmable Analogs → → → → The Programmable Analogs menu provides access to the following Setup parameters: Output Assignments, Output Scaling and Output Adjustments. The Programmable Analogs menu is accessed by pressing from the Output Settings menu. Press to view or reassign the four programmable analog output signals.

  • Page 103: Output Assignments

    700LX HFID 12-31-2021 Output Assignments → → → → → The Output Assignments screen allows the operator to view or change the signals assigned to the programmable analog outputs. From the Programmable Analogs menu press access the Output Assignments screen. Use the Up/Down arrows to highlight the field you intend to change.
  • Page 104 700LX HFID 12-31-2021 The following output signals can be programmed by the operator using the Output Assignments screen: mode the concentration’s output will be a live reading. RealTime: In either THC or CH : In CH mode the output concentration will be a live reading. In THC/CH /NMHC mode the output will be a read and hold.

  • Page 105: Output Scaling

    700LX HFID 12-31-2021 Output Scaling → → → → → The Output Scaling screen allows the operator to scale the analyzer’s Analog Outputs to a specific value for each of the four output signals. This is generally used for scaling of temperatures or pressures, but it can also be used to set an output for a specific concentration.
  • Page 106 700LX HFID 12-31-2021 EXAMPLES: 1. When the analog Output Assignment is set for Burner Temperature and the lower setting is set to 0.00 and the upper setting is set to 1000, 375°C will = 3.75 VDC. 2. When the analog Output Assignments are set for concentrations and the default upper and lower settings are 0.00 and 0.00, the default settings allow the output...

  • Page 107: Output Adjustments

    700LX HFID 12-31-2021 Output Adjustments → → → → → The Output Adjustments screen allows the operator to set the output to either mA or voltage and calibrate the outputs to exactly match the results obtained on a PLC or other remote data-recording device. Using the Output Adjustments screen, the operator can force the analog outputs to 0%, 50% or 100% of full scale and back to Measure.
  • Page 108 700LX HFID 12-31-2021 Once the output type has been selected, use the Left/Right arrows to move the highlight into the FS % column of the output to be checked. Press until the % FS value reads 0.000. To adjust the zero (Offset), use the Left/Right arrows highlight the Offset column and press to open the field.

  • Page 109: Programmable Digitals

    700LX HFID 12-31-2021 Programmable Digitals → → → → 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.

  • Page 110: Output Assignments

    700LX HFID 12-31-2021 Output Assignments → → → → → 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. Use the left and right arrow buttons to highlight the field you intend to change.
  • Page 111 700LX HFID 12-31-2021 Programmable Digital Output List Alarms ________________________________________________________________ • Flame: No Flame • AIEPC: Air Inject EPC Voltage • SampP: Sample Pressure • FIEPC: Fuel Inject EPC Voltage • AirP: Air Pressure • ROvr : Over Range • FuelP: Fuel Pressure •...
  • Page 112 700LX HFID 12-31-2021 General Alarms __________________________________________________________ • No Flame • Filter Temperature • Sample Pressure • Burner Temperature • Air Pressure • Sample EPC Voltage • Fuel Pressure • Air EPC Coil Voltage • Air Inject Pressure • Fuel EPC Coil Voltage •...

  • Page 113: Output Hold/Clear

    700LX HFID 12-31-2021 Output Hold/Clear → → → → → The Output Hold/Clear menu allows the operator to choose whether to hold or clear a triggered alarm when the alarm is no longer present. The current status is shown in the upper-right corner of the Output Hold/Clear menu.

  • Page 114: Output Test

    700LX HFID 12-31-2021 Output Test → → → → → The Output Test Screen allows the operator to test the Programmable Digital Outputs to make sure they are functioning properly. The Output Test Screen is accessed by pressing from the Programmable Digitals menu. The Output Test Warning screen (shown below) first appears, asking if you wish to continue the output test.
  • Page 115 700LX HFID 12-31-2021 To test outputs one at a time, use the Up/Down arrows to highlight the desired output, then press to change the state of the output (open or closed). Press again to change the state back. To test all the outputs at once, press to change the state of all the outputs (they are all Open in the example).

  • Page 116: Tcp/Ip Parameters

    700LX HFID 12-31-2021 TCP/IP Parameters → → → The TCP/IP Parameters screen is used for setting up the parameters for communication between an analyzer and computer. The TCP/IP Parameters screen is accessed by pressing from the Setup menu. TCP (Transmission Control Protocol) is a standard protocol for sending information between devices connected to a computer network.

  • Page 117: Data Logging Time

    Data logging allows the analyzer to store internal variables to support CAI troubleshooting. When troubleshooting with CAI Technical Support, the operator may be asked to turn this feature on. These files can only be accessed by CAI. To access the Data Logging screen press from the Setup menu.

  • Page 118: Auto Start Settings

    700LX HFID 12-31-2021 Auto Start Settings → → → The Auto Start Settings screen allows the operator to set parameters that will take effect upon power up of the analyzer. The Auto Start Settings screen is accessed by pressing from the Setup menu.
  • Page 119 700LX HFID 12-31-2021 THC/CH - Mode: Select the mode the analyzer starts up in; THC, CH or THC/CH /NMHC mode. (Methane option only) To change a setting use the Up/Down arrows to move the highlight to the setting you wish to change. Press to open the field to change the value.

  • Page 120: Clock Settings

    700LX HFID 12-31-2021 Clock Settings → → → 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.
  • Page 121 700LX HFID 12-31-2021...

  • Page 122: Auto Ignite

    700LX HFID 12-31-2021 Auto Ignite → → → The Auto Ignite Function determines whether the analyzer will ignite on power up or need to manually be initiated from the main menu. From the Setup menu press to access the Auto Ignite On/Off screen. The current Auto Ignite status appears in the upper-right corner of the screen.

  • Page 123: Alarms Menu

    700LX HFID 12-31-2021 Alarms Menu → → 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. Press to access the Alarm Log.

  • Page 124: Current Alarms

    700LX HFID 12-31-2021 Current Alarms → → → 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.

  • Page 125: Alarm Log

    700LX HFID 12-31-2021 Alarm Log → → → Screen Name Alarm Abbreviation Alarm Status Year / Month / Day Hour / Minute Alarm Value The Alarm Log allows the operator to view the analyzer’s last 40 alarms and their current statuses.
  • Page 126 700LX HFID 12-31-2021 Alarm Abbreviations and Descriptions Flame: No Flame FEPC: Fuel EPC Voltage SampP: Sample Pressure AIEPC: Air Inject EPC Voltage AirP: Air Pressure FIEPC: Fuel Inject EPC Voltage AInjP: Air Inject Pressure ROvr: Over Range FuelP: Fuel Pressure AUnd: ADC Under Range FInjP: Fuel Inject Pressure AOvr: ADC Over Range...

  • Page 127: Alarm Limits

    700LX HFID 12-31-2021 Alarm Limits → → → 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.

  • Page 128: Temperatures

    700LX HFID 12-31-2021 Temperatures → → → → 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 to open the field to change the value.

  • Page 129: Pressures

    700LX HFID 12-31-2021 Pressures → → → → From the Alarm Limits menu press to access the Pressures screen. Use the left or right arrow to highlight the alarm limit you intend to change. Press to open the field to change the value.

  • Page 130: Epc Voltages

    700LX HFID 12-31-2021 EPC Voltage % → → → → From the Alarm Limits menu, press to access the EPC Voltage Alarm Limits screen. Use the left or right arrow to highlight the alarm limit you intend to change. Press open the field to change the value.

  • Page 131: Concentrations

    700LX HFID 12-31-2021 Concentrations → → → → Concentration alarms can be set to trigger an alarm below or above a specified concentration. From the Alarm Limits menu, press to access the Concentration Alarm Limits screen. Use the left or right arrow to highlight the concentration alarm limit you intend to change.

  • Page 132: Alarm Display On/Off

    The scrolling alarms will be replaced with the CAI phone number when an alarm is active. If there are no alarms, only the date and time will be displayed.

  • Page 133: Service

    12-31-2021 Service → → The Service Menu is for advanced operators and CAI Service. The Service menu provides access to operator-level Linear Coefficients and Service Menu. From the Menus screen press to access the Service menu. Press to view or change operator-level Linear Coefficients.

  • Page 134: Linear Coefficients

    700LX HFID 12-31-2021 Linear Coefficients → → → The Linear Coefficients function allows the operator to optimize linearity by inputting up to five coefficients for each range to generate up to a fourth-order curve. From the Service menu press to access the Linear Coefficients screen. NOTES: •...
  • Page 135 700LX HFID 12-31-2021 Use the Up/Down arrows to highlight the coefficient you intend to change. Press to open the field, use the left and right arrow buttons to position the cursor, and use the Up/Down arrows or number keys to make your change. Press again to close the field.

  • Page 136: Service Menu

    The Service Menus should only be accessed by experienced technicians or when advised by a CAI representative. These screens allow the operator to change the Temperature Set Points, Pressure Set Points and the Amplifier zero offset. Changing these setpoints from factory setting can possibly cause damage or operate incorrectly.

  • Page 137: Temperature Set Points

    → The Temperature Setpoint screen should only be accessed by experienced technicians or when advised by a CAI representative. The Temperature Setpoint screen allows the operator to make slight adjustments to oven and pump temperatures. The Oven and pump temperatures should never need to be adjusted unless a board is replaced. From the Service Menu press to access the Temperature Set Point screen.

  • Page 138: Pressure Set Points

    The Pressure Setpoints screen should only be accessed by experienced technicians or when advised by a CAI representative. The Pressure Setpoint screen allows the operator to make slight adjustments to sample, air and fuel pressures. The Pressures should never need to be adjusted unless a capillary is replaced.

  • Page 139: Amplifier

    → The Amplifier zero offset screen should only be accessed by experienced technicians or when advised by a CAI representative. The Amplifier zero offset screen allows the operator to make slight adjustments to analyzers zero. From the Service Menu press to access the Amplifiers zero setpoint screen.

  • Page 140: Security

    700LX HFID 12-31-2021 Security → → The Security menu allows the operator to change the access to Standard or Setup Function menus and change or reset the Setup Function password. From the Menus screen press to access the Security menu. to set the operator’s access level.

  • Page 141: Operator Levels

    3-digit password. The analyzer will remain in this level until the operator changes it. Factory set 222 and can be changed by the end user. Factory Functions is for CAI use only.

  • Page 142: Change Password

    700LX HFID 12-31-2021 Change Password → → → The Change Password screen allows the operator to change the Operator Level passwords from the factory-preset 111 and 222 to a new password. From the Security menu screen press to access the Change Password screen. To change the password, press to open the field.

  • Page 143: Reset Password

    To return the password to the original factory password, you must enter the Master Password in the field. The master password can only be given to the end user by a CAI representative. Press to open the field and bring up a cursor. Use the Up arrow to scroll to the correct character.

  • Page 144: Communication And Interface

    700LX HFID 12-31-2021 Communication and Interface Analog and Digital Interface The Main and Auxiliary connectors provide the analog outputs for concentrations and other variable signals. Digital Status outputs, Control inputs and Calibration drive signals are also provided. There are four analog outputs, whose type (mA or specific voltage range) and signal assignments are assignable from the Setup menu.

  • Page 145: Analog And Digital Interface

    700LX HFID 12-31-2021 Analog and Digital Interface Hardware Capabilities of Main and Aux Connectors Analog Output The operator can choose one of the following output types: • As voltage outputs – 0 to 1V, 5V or 10V • As current outputs – 0 to 20 mA or 4 to 20 mA When set as current outputs, the maximum drive voltage provided by the analyzer is slightly more than 20 Volts, requiring that the maximum loop resistance less than 1K Ohms.
  • Page 146 700LX HFID 12-31-2021 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. CAUTION: Do not connect these pins directly to both sides of a voltage power supply as unrestricted current will damage the relay.
  • Page 147 700LX HFID 12-31-2021 28-Pin Main (BPM) Connector Assignments Pin # Signal Signal Type Operation Isolated Analog Ground Analog Output Isolated Analog Ground User-Defined AO-1 Analog Output 1V, 5V, 10VDC or mA User-Defined AO-2 Analog Output 1V, 5V, 10VDC or mA User-Defined AO-3 Analog Output 1V, 5V, 10VDC or mA...
  • Page 148 700LX HFID 12-31-2021 28-Pin Auxiliary (BPA) Connector Assignments Pin # Signal Signal Type Operation Analog Ground Analog Input Analog Ground Reserved Analog Input Reserved Reserved Analog Input Reserved Reserved Analog Input Reserved Relay RTN 1 Digital Output RTN Relays 1 - 4 Relay RTN 2 Digital Output RTN Relays 5 - 8...

  • Page 149: Serial Interface

    700LX HFID 12-31-2021 Serial Interface The serial interface enables remote control of the analyzer by a master computer. It is implemented as an RS232 V24 interface and meets all requirements of the AK protocol. 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)

  • Page 150: Ak Protocol

    Every command ends with the ETX (End of Text) character. The Error Status byte does not indicate the real number of errors. For Error Status, use the ASTF command. ® Example: Using Windows HyperTerminal for Serial RS232 Communications with CAI 700LX Series Analyzers requires: 1. HyperTerminal Software 2. Windows PC/Laptop 3.
  • Page 151 700LX HFID 12-31-2021 When both HyperTerminal and the analyzer are running while connected by the null modem cable, the analyzer will present a menu if sent a non-AK command. This menu can be ignored and 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.

  • Page 152: Instruction Command

    700LX HFID 12-31-2021 Instruction Command Byte Character Explanation Byte ASCII Code 02 Don’t Care Byte Any ASCII code Byte Function Code 1 AK instruction, e.g. ASTF Byte Function Code 2 AK instruction, e.g. ASTF Byte Function Code 3 AK instruction, e.g. ASTF Byte Function Code 4 AK instruction, e.g.
  • Page 153 700LX HFID 12-31-2021 Acknowledgement Command Byte Character Explanation Byte ASCII Code 02 Don’t Care Byte Any ASCII code Byte Function Code 1 Echo of the AK instruction command Byte Function Code 2 Echo of the AK instruction command Byte Function Code 3 Echo of the AK instruction command Byte Function Code 4...

  • Page 154: Error Handling

    700LX HFID 12-31-2021 Error Handling It is possible that an unknown instruction is sent, the analyzer is busy with a function that is not the desired one, or an error occurred in the command parameters. The table below provides a summary of all errors that can appear upon any master instruction.

  • Page 155: General Ak Requirements

    700LX HFID 12-31-2021 General AK Requirements 1. If the command message contains no error, the Acknowledge message contains the echo of the Function code and the Error Status number (0 to 9). 2. If the transfer was faulty or the function code is unknown, the answer contains four question marks (for example, ???? 0).
  • Page 156 700LX HFID 12-31-2021 Abbreviations Abbreviation Description Measuring range number Mn .. M4 Measuring range 1 .. 4 w.w .. ZZ. Numerical value Number Numeric integer value a0 .. a4 Polynomial coefficients Status Yyymmdd 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:...

  • Page 157: Scan Commands

    700LX HFID 12-31-2021 Scan Commands AAEG: Verifying Span-Point Deviation During Auto Calibration Command Response Description _AAEG_K0 _AAEG_s_M1_z.z_da_dr Verifying deviations of ranges M1 to M4 _M2_z.z_da_dr from span point stored after auto calibration. _M3_z.z_da_dr Values: measured value (z.z), absolute dev _M4_z.z_da_dr (da), relative dev (dr).
  • Page 158 700LX HFID 12-31-2021 ADAL: Diagnostic Alarm Limits Command Response Description _ADAL_K0 _ADAL_s_a1.min_a1.max_..Set all alarm limits (numbers and descriptions) _a16.min_a16max 1. Sample pressure 2. Air pressure 3. Fuel pressure 4. Air inject pressure 5. Fuel inject pressure 6. Filter temperature 7.
  • Page 159 700LX HFID 12-31-2021 ADRU: Pressures / Electronic Pressure Control Valve Voltage in Percent Command Response Description _ADRU_K0 _ADRU_s_z.z_y.y_x.x…… 1. Sample Pressure 2. Air Pressure 3. Fuel Pressure 4. Air Inject Pressure 5. Fuel Inject Pressure 6. % of Sample EPC Volts 7.
  • Page 160 700LX HFID 12-31-2021 AENT: Query Calibration Gas Flow Settings (Pumps or Valves) Command Response Description _AENT_K0 _AENT_s_x x: 10 = Pump 11 = Valves AFDA: Auto Calibration Times and Purge Time Command Response Description _AFDA_K0_SATK _AFDA_s_z_y_x_w Auto calibration times in seconds z: Purge time y: Verify time x: Purge after time...
  • Page 161 700LX HFID 12-31-2021 AKAK: Calibration Gas Concentrations Command Response Description _AKAK_K0 _AKAK_s_M1_w.w All existing calibration gas values are responded. _M2_x.x _M3_y.y _M4_z.z _AKAK_K0_Mn _AKAK_s_Mn_z.z Calibration gas value of Range n. AKAL: Percent Deviations of Last Accepted Calibration Command Response Description _AKAL_K0_ _AKAL_s_M1_z.z_y.y_x.x_w.w Percent Deviation of Ranges M1 to M4.
  • Page 162 700LX HFID 12-31-2021 AKON: Measured Concentration Value Command Response Description _AKON_K0 _AKON_s_z.z_y.y_x.x_w.w_v.v_t z.z : Current Measure Value y.y : CH concentration x.x : NMHC concentration w.w : THC concentration v.v : Not used Note: y.y, x.x, and w.w are normally 0.0 when “THC/CH NMHC”...
  • Page 163 700LX HFID 12-31-2021 ARAW: Raw Detector Volts Command Response Description _ARAW_K0 _ARAW_s_z.z_t Raw Detector Volts t = Timestamp (1/10 sec.) ARMU: Raw Engineering Value Command Response Description _ARMU_K0 _ARMU_s_z.z_t Raw Engineering Value before linearization, offset and gain corrections for t = Timestamp (1/10 sec.).
  • Page 164 700LX HFID 12-31-2021 19. ADC range overflow 20. Range 1 calibration error 21. Range 2 calibration error 22. Range 3 calibration error 23. Range 4 calibration error 24. Concentration 1 warning 25. Concentration 2 warning 26. Dummy text for RTC-time ASTZ: Normal Device Status Command Response...
  • Page 165 700LX HFID 12-31-2021 ASYZ: Respond System Time Command Response Description _ASYZ_K0 _ASYZ_s_yymmdd_hhmmss System Time: yymmdd: year, month, day (each 2 characters wide, no spaces) hhmmss: hour, minute, second (each 2 characters wide, no spaces) AT90: Respond Lowpass Filter Time Command Response Description _AT90_K0...
  • Page 166 700LX HFID 12-31-2021 AUDP: Query UDP Data Streaming Parameter Command Response Description _AUDP_K0 _AUDP_s_<UDPPort> UDP port: opened for connection <DataFrequency>_[<Mode>] Data Frequency: Transmission Frequency of the _[<UDP_IP>] 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.

  • Page 167: Control Commands

    700LX HFID 12-31-2021 Control Commands SARA: Auto Range Off Command Response Description _SARA_K0 _SARA_s Set auto range off. SARE: Auto Range On Command Response Description _SARE_K0 _SARE_s Set auto range On. SATK: Start Automatic Calibration Command Response Description _SATK_K0 _SATK_s Start automatic calibration of all available ranges.
  • Page 168 700LX HFID 12-31-2021 SEKA: Saves Measured Value as New Span Value Command Response Description _SEKA_K0 _SEKA_s Saves measured value of actual range as gain if Span mode is set. SEMB: Set Measuring Range Command Response Description Set measuring range to range ‘ n ‘. Auto range _SEMB_K0_Mn _SEMB_s will be disabled.
  • Page 169 700LX HFID 12-31-2021 SPAU: Pause Command Response Description _SPAU_K0 _SPAU_s Pause mode (Shuts off Flame) SREM: Remote Mode for AK Commands Command Response Description _SREM_K0 _SREM_s Set analyzer in Remote mode. SRES: Reset Command Response Description _SRES_K0 _SRES_s Reset SSPL: Purge Analyzer with Zero Gas Command Response Description...

  • Page 170: Configuration Commands

    700LX HFID 12-31-2021 Configuration Commands EATK: Set Auto Calibration Parameters Command Response Description _EATK_K0_z_y_x _EATK_s_z_y z: 1) CH Mode 2) THC Mode y: 1) ALL gases 2) Zero gas only EDAL: Set Diagnostic Alarm Limits Command Response Description _EDAL_K0_al.min_ _EDAL_s Set all alarm limits (numbers and descriptions) a1.max_..._a16max 1.
  • Page 171 700LX HFID 12-31-2021 EEFF: CH Offset and Correction Factor Command Response Description _EEFF_K0 _EEFF_s_z.z_y.y_x.x z.z: Correction Factor y.y: CH Offset CH x.x: CH Response Factor EFDA: Set Auto Calibration and Purge Times Command Response Description _EFDA_K0_SATK_ _EFDA_s Set auto calibration times: z_y_x z: Purge time y: Verify time...
  • Page 172 700LX HFID 12-31-2021 EMBE: Set the Four Measuring Range Full Scale Limits Command Response Description _EMBE_K0_M1_ _EMBE_s Set the range full scale limits. w.w_M2_x.x_M3_ y.y_M4_z.z EMBU: Set the Upper and Lower Range Switchover for Auto Range Command Response Description _EMBU_K0_M1_ _EMBU_s Set the lower and upper range switchover limits.
  • Page 173 700LX HFID 12-31-2021 ET90: Set Lowpass Filter Time Command Response Description _ET90_K0_t _ET90_s Set lowpass filter time: t = filter time ETCP: Set TCP/IP Parameters Command Response Description _ETCP_K0_ _ETCP_s Zzz = TCP/IP address zzz.zzz.zzz.zzz_ yyy = TCP/IP subnet mask yyy.yyy.yyy.yyy_xxxx xxxx = TCP/IP port All changes take effect after next Power On...
  • Page 174 700LX HFID 12-31-2021 Data Format DATA is any number of AK commands delimited by a semicolon (;). Replace underscore (_) in the AK command with a space. If data is given, UDP_IP has to be set to a legal IP address or a hyphen (-) if default access should be used.

  • Page 175: Modbus Protocol

    700LX HFID 12-31-2021 Modbus Protocol Modbus on TCP/IP Application Data Unit MBAP Description This section describes the encapsulation of a Modbus request or a response when it is carried on a Modbus TCP/IP network. A dedicated header, called the MBAP (Modbus Application Protocol) header, is used on TCP/IP to identify the Modbus Application Data Unit.

  • Page 176: Mbap Header Description

    700LX HFID 12-31-2021 MBAP Header Description The MBAP Header contains the following fields: Field Length Description Transaction Identifier 2 Bytes Identification of a Modbus request / Response transaction Protocol Identifier 2 Bytes 0 = Modbus Length 2 Bytes Number of following bytes Unit Identifier (3) 1 Byte Identification of a remote slave connected on a serial line or...

  • Page 177: Modbus Command Function Codes

    700LX HFID 12-31-2021 Modbus Command Function Codes Code 01 This function code is used to read from 1 to 2000 contiguous status bits in a remote device. The requesting remote device specifies the starting address, including the address of the first bit specified and the number of bits.
  • Page 178 700LX HFID 12-31-2021 Error Function Code 1 Byte Function code + 0x80 Exception Code 1 Byte 01 or 02 or 03 or 04 Here is an example of a request to read discrete outputs 20–38: Request Response Field Name (Hex) Field Name (Hex) Function...
  • Page 179 700LX HFID 12-31-2021 Command 01, Read Coil 200 Count 1. Result = 01. Command 01, Read Coil 200 Count 16. Result = 55 55 hex.
  • Page 180 700LX HFID 12-31-2021 Code 03 This command has been modified to read floating-point numbers in 32-bit IEEE format. This function code is used to read the contents of a contiguous block of floating-point registers in a remote device. The Request PDU specifies the starting register address and the number of registers.
  • Page 181 700LX HFID 12-31-2021 Here is an example of a request to read Register 0: Request Response Field Name (Hex) Field Name (Hex) Function Function Starting Address Hi Byte Count Starting Address Lo Register Value Hi (1) Number of Registers Hi Register Value Lo (1) Number of Registers Lo Register Value Hi (0)
  • Page 182 700LX HFID 12-31-2021 Here is an example of a request to read three registers starting at 40201: Request Response Field Name (Hex) Field Name (Hex) Function Function Starting Address Hi Byte Count Starting Address Lo Register Value Hi (40202) Number of Registers Hi Register Value Lo (40201) Number of Registers Lo Register Value Hi (40201)
  • Page 183 700LX HFID 12-31-2021 Command 03, Read four Floating Point values starting at Address 1. Result = 1234.56789, 0.0 -1234.568, 10000.
  • Page 184 700LX HFID 12-31-2021 Code 04 This function code is used to read from 1 to 125 contiguous input registers in a remote device. The Request PDU specifies the starting register address and the number of registers. In the PDU, registers are addressed starting at zero. Therefore input registers numbered 1-16 are addressed as 0-15.
  • Page 185 700LX HFID 12-31-2021 Here is an example of a request to read Input Register 8: Request Response Field Name (Hex) Field Name (Hex) Function Function Starting Address Hi Byte Count Starting Address Lo 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.
  • Page 186 700LX HFID 12-31-2021 Code 05 This function code is used to write a single output to either ON or OFF in a remote device. The requested ON/OFF state is specified by a constant in the request data field. A value of FF 00 hex requests the output to be ON.
  • Page 187 700LX HFID 12-31-2021 Here is an example of a 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...
  • Page 188 700LX HFID 12-31-2021 Code 06 This function code is used to write a single holding register in a remote device. The Request 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.
  • Page 189 700LX HFID 12-31-2021 Here is an example of a 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...
  • Page 190 700LX HFID 12-31-2021 Code 16 This function code is used to write a single floating point register to a remote device. The requested written values are specified in the request data field. Data is packed as four bytes per register. The normal response returns the function code, starting address and quantity of registers written.
  • Page 191 700LX HFID 12-31-2021 Here is an example of a request to write two registers starting at 2 to 00 0A and 01 02 hex: Request Response Field Name (Hex) Field Name (Hex) Function Function Starting Address Hi Starting Address Hi Starting Address Lo Starting Address Lo Quantity of Registers Hi...
  • Page 192 700LX HFID 12-31-2021 Command 16, Write one floating point register at Address 40200 showing error response. Not a valid address.
  • Page 193 700LX HFID 12-31-2021 Code 26 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...

  • Page 194: Modbus Map

    700LX HFID 12-31-2021 Modbus Map 01H Single-Read Coil Modbus Commands Use TCP/IP Port 502. (Do not change TCP/IP port from 7700.) Coil Numbers and Descriptions Coil Number Read Data No Flame Sample Pressure Air Pressure Fuel Pressure Air Inject Pressure (if fitted) Fuel Inject Pressure (if fitted) Filter Temperature Burner Temperature...
  • Page 195 700LX HFID 12-31-2021 Coil Number Read Data High Concentration 0 - Standby, 1 - Measure General Alarm Eng units For additional alarms and status 0 - Manual, 1 - Remote 0 - Standby, 1 - Measure 1 - Zero, 1 - Span, 1 - AutoCal 1 - Purge 1 - Pause...

  • Page 196: 05H Write Single Coil

    700LX HFID 12-31-2021 05H Write Single Coil Modbus Commands Use TCP/IP Port 502. (Do not change TCP/IP port from 7700.) Coil Numbers and Descriptions Coil Number Write Data 0 - Manual, 1 - Remote 0 - Standby, 1 - Measure 1 - Zero, 1 - Span, 1 - AutoCal...

  • Page 197: 03H Read Floating Point

    700LX HFID 12-31-2021 03H Read Floating Point Modbus Commands Use TCP/IP Port 502. (Do not change TCP/IP port from 7700.) Register Numbers and Descriptions Register Number Contents IEEE 40001 UNDILUTED Real Time Concentration = Diluted Conc * Dil. Ratio / 10000 40003 DILUTED Real Time Concentration 40005...
  • Page 198 700LX HFID 12-31-2021 Register Number Contents IEEE 40063 Range 1 Gain 40065 Range 2 Offset 40067 Range 2 Gain 40069 Range 3 Offset 40071 Range 3 Gain 40073 Range 4 Offset 40075 Range 4 Gain 40109 Range 1 Full Scale 40111 Range 2 Full Scale 40113...
  • Page 199 700LX HFID 12-31-2021 Register Number Contents IEEE 40239 Air inject Pressure Minimum (if fitted) 40241 Air inject Pressure Maximum (if fitted) 40243 Fuel Inject Pressure Minimum (if fitted) 40245 Fuel Inject Pressure Maximum (if fitted) 40247 Filter Temperature Minimum 40249 Filter Temperature Maximum 40251 Burner Temperature Minimum...

  • Page 200: 16H Write Floating Point

    700LX HFID 12-31-2021 16H Write Floating Point 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 40205 Range 3 Span gas concentration 40207...
  • Page 201 700LX HFID 12-31-2021 Register Number Contents IEEE 40267 Sample EPC Voltage Minimum 40269 Sample EPC Voltage Maximum 40271 Air EPC Voltage Minimum 40273 Air EPC Voltage Maximum 40275 Fuel EPC Voltage Minimum 40277 Fuel EPC Voltage Maximum 40279 Air Inject EPC Voltage Minimum (if fitted) 40281 Air Inject EPC Voltage Maximum (if fitted) 40283...

  • Page 202: Warranty Statement

    Buyer by CAI and if any such product should prove to be defective within such one year period, CAI agrees, at its option, either (i) to correct by repair or, at CAI’s election, by replacement with...
  • Page 203 (but not in excess of one year) stated on the label at the time of delivery or 90 days; f) CAI may from time to time provide a special printed warranty with respect to a certain product, and where applicable, such warranty shall be deemed incorporated herein by reference;...

Table of Contents

Save PDF