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Kurz 255 Series Operation Manual

Flow averaging transmitter
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Series 255 Flow Averaging Transmitter
Operations Guide
368057B

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Summary of Contents for Kurz 255 Series

  • Page 1 Series 255 Flow Averaging Transmitter Operations Guide 368057B...
  • Page 2 (including negligence), strict liability or other theories of law, by reason of such use. The Kurz logo is a trademark of Kurz Instrument, Inc., registered in the U.S. and other countries. Use of the Kurz logo for commercial purposes without the prior written consent of Kurz Instruments, Inc. may constitute trademark infringement in violation of federal and state laws.

  • Page 3: Table Of Contents

    Table of Contents Preface ..................viii Overview ......................ii-viii Before You Begin .................... Series 255 Description ................... Using this Manual ..................Manual Conventions ..................Glossary ......................Chapter 1 Panel Display & Operating Modes ..........Overview ......................Front Panel ....................Display ..................... Keypad ....................
  • Page 4 Chapter 3 Program Mode Basic Access ............. Overview ......................Program Mode — Basic Access ..............Option 1 — Tag Name ................Option 2 — Flow Units ................Option 3 — Flow Area Setup ..............Option 4 — Analog Output Setup ............Option 5 –...
  • Page 5 Option 25 — NE-43 Alarm Test ............... 4-33 Option 26 — Restore Auxiliary Configuration ......... 4-33 Option 27 — Restore Factory Configuration ........... 4-34 Option 28 — Save to Auxiliary Configuration ......... 4-34 Option 29 — Output Report to USB ............4-35 Option 30 —...
  • Page 6 List of Tables Chapter 1 Panel Display & Operating Modes Table 1-1. Keypad Character Map .............. Table 1-2. Status Indicator Descriptions ............ Table 1-3. Display Mode Functions ............Table 1-4. Program Mode — Basic Access Functions ......... Table 1-5. Program Mode — Advanced Access Functions ......1-10 Chapter 2 Display Mode...
  • Page 7 List of Figures Chapter 1 Panel Display & Operating Modes Figure 1-1. Series 255 Display ..............Figure 1-2. Series 255 Keypad ..............Figure 1-3. Series 255 Status Indicators ............Chapter 2 Display Mode Chapter 3 Program Mode Basic Access Chapter 4 Program Mode Advanced Access Figure 4-1.

  • Page 8: Preface

    Preface Overview This guide provides instructions for operating the Series 255 Flow Averaging Transmitter. The unit should be installed as instructed in the Series 255 Flow Averaging Transmitter Hardware Guide. Series 255 Flow Averaging Transmitter Operations Guide viii...

  • Page 9: Before You Begin

    The Series 255 works in conjunction with two or more Kurz Instruments B-Series flow meters – either the Kurz 454FTB, K-BAR 2000B, or K-BAR 2000B-WGF insertion meters. The four models in the Series 255 product line support up to 4, 9, or 16 flow sensors for performing the following functions: Provide 24 VDC power to each flow sensor.

  • Page 10: Manual Conventions

    Manual Conventions The following table lists conventions used in the Kurz documentation and provides an example or description of each convention. Table 1. Conventions used in this manual Convention / Example Description Text that you type, click, or select (for example, field names, Check the Configuration File checkbox menus, and commands) appear in bold.

  • Page 11: Glossary

    A through P. Each flow meter or channel is assigned a unique and fixed address starting at address 11 through 26. Kurz multipoint flow meters have two to four flow sensing units Kurz single-point flow meters one flow sensing unit.
  • Page 12 Output There are two 4-20 mA analog outputs on the Series 255. Each is user assignable to flow rate, velocity, or temperature, and user scalable to represent the full range or any subset. They are isolated and have fault indication per NAMUR NE-43 guidelines. Ord Loc Ordinary Industrial Location environments where rough usage, moisture, dust, dirt, and corrosion are a potential problem and where there is no...

  • Page 13: Panel Display & Operating Modes

    Chapter 1 Panel Display & Operating Modes Overview This section describes the display, keypad, and status indicators on the Series 255 Flow Averaging Transmitter, and provides a basic description for each operating mode: Run mode • Display mode (view only) •...

  • Page 14: Front Panel

    Panel Display & Operating Modes Front Panel All Series 255 models include a front panel display with four rows of 20 characters and a 20-key keypad (several keys have dual functions). Display The large display characters (approximately 8 mm x 5 mm) facilitate easier viewing from a distance. Figure 1-1 shows the display when the Series 255 is in Run Mode.

  • Page 15: Keypad

    Panel Display & Operating Modes Keypad The membrane keypad has 20 function keys. The keys are used for navigating a menu system and for viewing or changing application parameters. PAGE HOME PQRS WXYZ ENTER CLEAR Figure 1-2. Series 255 Keypad The key functions are as follows: The P key accesses Program mode for making Basic or Advanced configuration changes to the •...

  • Page 16: Table 1-1. Keypad Character Map

    Panel Display & Operating Modes The numeric keys include 0 through 9, with keys 2 through 9 also being used for letters A to Z. For data entry fields that accept alphabetic/numeric data strings, continue pressing the numeric key to cycle through the letters.

  • Page 17: Status Indicators

    Panel Display & Operating Modes Status Indicators There are five status indicators just below the display. These indicators provide an “at-a-glance” overview of the health of the Series 255 System and its components. The indicators are color coded according to NAMUR NE-107 specification.

  • Page 18: Operating Modes

    Panel Display & Operating Modes Operating Modes The Series 255 has three modes: Run mode – Normal operational state of the Series 255. • Display mode – Provides a view-only mode of system data and parameters. • No access code is required for Display mode. Program mode –...

  • Page 19: Program Mode

    In instances where you continue to cycle through the parameters, press H to exit the menu. In the event unwanted changes are made, Kurz provides the ability to reset the Series 255 to Important the original Factory settings, as described in Chapter 4, Program Mode Advanced Access, “Option 27 —...

  • Page 20: Program Mode - Basic Access

    Panel Display & Operating Modes Program Mode — Basic Access Before making any configuration changes in Program mode, it is important to remember: Any configuration changes are automatically saved to EEPROM when the Series 255 exits out of • Program mode. There are no prompts to confirm changes. To back out of a menu, press H one or more times to return to the function prompt.

  • Page 21: Program Mode - Advanced Access

    Panel Display & Operating Modes Program Mode — Advanced Access Before making any configuration changes in Program mode, it is important to remember: Any configuration changes are automatically saved to EEPROM when the Series 255 exits out of • Program mode. There are no prompts to confirm changes. To back out of a menu, press H one or more times to return to the function prompt.

  • Page 22: Table 1-5. Program Mode - Advanced Access Functions

    Panel Display & Operating Modes Table 1-5. Program Mode — Advanced Access Functions Option # Function Option # Function Tag Name System Operational State Flow Units Number of Channels Flow Area Setup Channel Setup Analog Output Setup User Access Codes Flow Set Point Setup Analog Output Calibration Temperature Set Point Setup...

  • Page 23: Display Mode

    Chapter 2 Display Mode Overview This chapter provides a description for each Display mode function. The Display mode options are as follows: Option 1 — Channel Velocity Summary • Option 2 — Channel Temperature Summary • Option 3 — Channel Velocity and Temperature Summary •...

  • Page 24: Display Mode

    Display Mode Display Mode Pressing the D key enters Display mode, which provides view-only access to summary information. Table 2-1 provides a quick reference for Display mode functions. Table 2-1. Display Mode Option Function Example Description / Purpose Channel Velocity Press UP or DN to scroll SMPS Summary...
  • Page 25 Display Mode Table 2-1. Display Mode (continued) Option Function Example Description / Purpose Channel Detail Shows channel, channel fault CHA CHAN A 0000 status, raw channel data, 2.5 NMPS ONL channel state, channel TEMP 20.0 DEGC INC velocity and temperature, and whether or not the channel is included in the average.

  • Page 26: Option 1 - Channel Velocity Summary

    Display Mode Option 1 — Channel Velocity Summary The units of the velocity data is displayed on the top right of the display To access the Channel Velocity Summary in Display mode: Press the D key. 1> Press 1 for the Channel Velocity Summary view. 2>...

  • Page 27: Option 3 - Channel Velocity And Temperature Summary

    Display Mode Option 3 — Channel Velocity and Temperature Summary Press the D key. 1> Press 3 for the Channel Velocity and Temperature Summary view. 2> User units in English Units User units in SI Units A 393.7 SFPM 68 F 2 SMPS 20 C 0 SFPM...

  • Page 28: Option 5 - Channel Detail

    Display Mode Option 5 — Channel Detail Channel Detail provides a view of the information acquired from the individual flow sensor. This information can be used to troubleshoot the possible causes if a sensor is kicked out of the flow average. To access the Channel Detail in Display mode: Press the D key.

  • Page 29: Option 6 - Average Velocity Summary

    Display Mode Option 6 — Average Velocity Summary This display mode menu option provides the raw and corrected average velocity. To view the raw and corrected average velocity in Display mode: Press D. 1> Press 6 to view the Raw and Corrected Velocity . 2>...

  • Page 30: Option 8 - Process Gas Information

    Display Mode Option 8 — Process Gas Information To access the Process Gas menu in Display mode: Press D. 1> Press 8 for the Process Gas view. 2> DRY AIR MOL.WT 28.950 G/MOL DENSITY 1.184 KG/CM The gas name, molecular weight, and density appear. This information must be the same as the process gas calibrated for the individual flow sensors, as specified at the factory per the customer order (and unchangeable by the user).
  • Page 31 Chapter 3 Program Mode Basic Access Overview This chapter provides a description for each Basic access function available in Program mode. The Basic access options are as follows: Option 1 — Tag Name • Option 2 — Flow Units • Option 3 —...
  • Page 32 Program Mode Basic Access Program Mode — Basic Access Table 3-1 provide a quick reference to Basic access menus and parameters. Before making any configuration changes in Program mode, it is important to remember: You should not make any changes to the configuration without a complete Important understanding of the parameters.
  • Page 33 Program Mode Basic Access Table 3-1. Program Mode — Basic Access Option Function Example Description / Purpose / Parameters 255 TAG ID Tag Name A device name up to 15 characters. UNITNAME (page 3-6) FLOW UNITS Flow Units Volumetric and mass rate in English (page 3-7) or metric units.
  • Page 34 Program Mode Basic Access Table 3-1. Program Mode — Basic Access (continued) Option Function Example Description / Purpose / Parameters Enter low and high Flow Set Flow Set Point Setup FLOW SETPOINT (page 3-12) Points. LOW > 0.0 SCMH HIGH 925000.0 SCMH FLOW SETPOINT 0.0 SCMH...

  • Page 35: Table 3-1. Program Mode - Basic Access

    Program Mode Basic Access Table 3-1. Program Mode — Basic Access (continued) Option Function Example Description / Purpose / Parameters RESET TOTALIZER Reset Totalizer Resets the totalizer. (page 3-15) CONFIRM> NO Confirmation options: FIELD CALIBRATION CF Field Calibration Correction Factor applied to the >...
  • Page 36 Program Mode Basic Access Option 1 — Tag Name The tag name is the Series 255 transmitter name. The name (up to 15 characters) can indicate the location, process, or company naming convention. To access the Tag Name menu in Program mode: Press P.
  • Page 37 Program Mode Basic Access Option 2 — Flow Units The 255 provides a flow rate measurement as either mass flow rate or volumetric flow rate. The mass flow rate is the mass of the gas flowing through a pipe per time with units such as kilograms per hour (KGH), kilograms per minute (KGM), pounds per hour (PPH).
  • Page 38 Program Mode Basic Access Option 3 — Flow Area Setup To access the Flow Area Setup menu in Program mode: Press P. 1> Enter the Basic access code, and then press E. 2> Press 3 for the Flow Area Setup menu, and then press E. 3>...
  • Page 39 Program Mode Basic Access Custom duct profile For an irregular duct profile, enter the specific duct flow area: Enter the flow area using the number and decimal keys. a> FLOW AREA > 38.48 SQM Press E. b> Option 4 — Analog Output Setup The output and signal range for process variables measured by the flow meter are configured through the Analog Output Setup menu in Program mode.
  • Page 40 Program Mode Basic Access Flow Rate Select Flow Rate, and then press E. a> AO1 TYPE > FLOW RATE A prompt appears for setting the flow rate at the 4 mA value for Analog Output #1. AO1 FLOW AT 4MA >...
  • Page 41 Program Mode Basic Access A prompt appears for setting the temperature at the 20 mA value for Analog Output #2. AO2 TEMPERATURE AT 20MA > 20.0 DEGC Use the number and decimal keys to change the temperature range, and then press E. c>...
  • Page 42 Program Mode Basic Access Option 5 – Flow Set Point Setup The 255 continuously checks the flow measurement against a user specified low and high set point and alerts if the flow measurement is out of the user specified range. Option 5 is used to enter the Flow Set Points.
  • Page 43 Program Mode Basic Access Option 6 – Temperature Set Point Setup The 255 continuously checks the temperature measurement against a user specified low and high set point and alerts if the temperature measurement is out of the user specified range. Option 6 is used to enter the Temperature Set Points.
  • Page 44 Program Mode Basic Access Option 7 — Alarm Setup The Series 255 supports up to two alarms. To access the Alarm Setup menu in Program mode: Press P. 1> Enter the Basic access code, and then press E. 2> Press 7 for the Alarm Setup menu, and then press E. 3>...
  • Page 45 Program Mode Basic Access Option 8 — Totalizer Setup To access the Totalizer Setup menu in Program mode: Press P. 1> Enter the Basic access code, and then press E. 2> Press 8 for the Totalizer Setup menu, and then press E. 3>...
  • Page 46 Program Mode Basic Access Option 10 — Field Calibration Correction Factor This menu option (#10) is used to enter the Field Calibration Correction Factor (FCCF) and the Flow Filter Time Constant. The Field Calibration Correction Factor is a multiplier that is used as a bias correction on the flow average.
  • Page 47 Program Mode Basic Access Option 11 — Variable Correction Factor Setup The Variable Correction Factor (VCF) is a velocity-dependent correction factor applied to the velocity average to account for velocity dependent deviations. Its value depends on the current velocity. VCF data is obtained by performing a field traverse of field calibration of the duct. To access the Variable Correction Factor (VCF) Setup menu in Program mode: Press P.
  • Page 48 Program Mode Basic Access Repeat the process for each additional VCF data set. Option 12 — Run Mode Display Setup Run mode is the normal operational state of the Series 255. You can setup the information that appears on the display during Run mode. The default display information in Run mode is tag name, flow rate, and temperature.
  • Page 49 Program Mode Basic Access Repeat the steps for Lines 2 and 3. The active field is identified by the ^ v characters that indicate 8> making a selection using the UP or DN key. Press P to move to the next active field. The prompt returns to the main Advanced mode menu after specifying Line 3.
  • Page 50 Chapter 4 Program Mode Advanced Access Overview This chapter provides a description for each Advanced access option. The Advanced access options are as follows: • Option 1 — Tag Name Option 19 — System Operational State • • Option 2 — Flow Units Option 20 —...
  • Page 51 Program Mode Advanced Access Program Mode — Advanced Access Table 4-1 provide a quick reference to Advanced access menus and parameters. Before making any configuration changes in Program mode, it is important to remember: You should not make any changes to the configuration without a complete understanding of Important the parameters.
  • Page 52 Program Mode Advanced Access Table 4-1. Program Mode — Advanced Access Option Function Example Description / Purpose / Parameters 255 TAG ID Tag Name A device name up to 15 characters. UNITNAME (page 4-10) FLOW UNITS Flow Units Volumetric and mass rate in English (page 4-11) or metric units.
  • Page 53 Program Mode Advanced Access Table 4-1. Program Mode — Advanced Access (continued) Option Function Example Description / Purpose / Parameters Enter low and high Flow Set Flow Set Point Setup FLOW SETPOINT (page 4-16) Points. LOW > 0.0 SCMH HIGH 925000.0 SCMH FLOW SETPOINT 0.0 SCMH...

  • Page 54: Table 4-1. Program Mode - Advanced Access

    Program Mode Advanced Access Table 4-1. Program Mode — Advanced Access (continued) Option Function Example Description / Purpose / Parameters RESET TOTALIZER Reset Totalizer Resets the totalizer. (page 4-19) CONFIRM> NO Confirmation options: FIELD CALIBRATION CF Field Calibration Correction Factor applied to the >...
  • Page 55 Program Mode Advanced Access Table 4-1. Program Mode — Advanced Access (continued) Option Function Example Description / Purpose / Parameters NE-43 ALARM LEVEL NE-43 Alarm Level NE-43 Alarm Level options: LOW OUTPUT HIGH OUTPUT > LOW OUTPUT (page 4-25) MODBUS BAUD RATE Modbus Baud Rate Allows you to setup up Modbus (page 4-26)
  • Page 56 Program Mode Advanced Access Table 4-1. Program Mode — Advanced Access (continued) Option Function Example Description / Purpose / Parameters ANALOG OUT #1 Analog Output Analog Output options: Calibration CAL AO1 to 4.000 mA (page 4-31) USE ^v TO ADJUST OUT OUT = 4.000 mA CAL AO1 to 20.000 mA USE ^v TO ADJUST OUT...
  • Page 57 Program Mode Advanced Access Table 4-1. Program Mode — Advanced Access (continued) Option Function Example Description / Purpose / Parameters SELECT OUTPUT TO USB to downloads a selected Output Report to USB Used > CURR CFG (page 4-35) report in a readable text format to the USB port SELECT OUTPUT TO USB PRESS E TO CONTINUE...
  • Page 58 Program Mode Advanced Access Table 4-1. Program Mode — Advanced Access (continued) Option Function Example Description / Purpose / Parameters SELECT DRIFT TEST Zero-Span Manual User can start a drift test on- Command >ZERO DRIFT CHECK ^v demand. Any of the drift test levels can be selected or the complete cycle can be selected - ZERO/MID/ SPAN/CYCLE...
  • Page 59 Program Mode Advanced Access Option 1 — Tag Name The tag name is the Series 255 transmitter name. The name (up to 15 characters) can indicate the location, process, or company naming convention. To access the Tag Name menu in Program mode: Press P.
  • Page 60 Program Mode Advanced Access Option 2 — Flow Units The 255 provides a flow rate measurement as either mass flow rate or volumetric flow rate. The mass flow rate is the mass of the gas flowing through a pipe per time with units such as kilograms per hour (KGH), kilograms per minute (KGM), pounds per hour (PPH).
  • Page 61 Program Mode Advanced Access Option 3 — Flow Area Setup To access the Flow Area Setup menu in Program mode: Press P. 1> Enter the Advanced access code, and then press E. 2> Press 3 for the Flow Area Setup menu, and then press E. 3>...
  • Page 62 Program Mode Advanced Access Custom duct profile For an irregular duct profile, enter the specific duct flow area: Enter the flow area using the number and decimal keys. a> FLOW AREA > 38.48 SQM Press E. b> Option 4 — Analog Output Setup The output and signal range for process variables measured by the flow meter are configured through the Analog Output Setup menu in Program mode.
  • Page 63 Program Mode Advanced Access Flow Rate Select Flow Rate, and then press E. a> AO1 TYPE > FLOW RATE A prompt appears for setting the flow rate at the 4 mA value for Analog Output #1. AO1 FLOW AT 4MA >...
  • Page 64 Program Mode Advanced Access A prompt appears for setting the temperature at the 20 mA value for Analog Output #2. AO2 TEMPERATURE AT 20MA > 20.0 DEGC Use the number and decimal keys to change the temperature range, and then press E. c>...
  • Page 65 Program Mode Advanced Access Option 5 – Flow Set Point Setup The 255 continuously checks the flow measurement against a user specified low and high set point and alerts if the flow measurement is out of the user specified range. Option 5 is used to enter the Flow Set Points.
  • Page 66 Program Mode Advanced Access Option 6 – Temperature Set Point Setup The 255 continuously checks the temperature measurement against a user specified low and high set point and alerts if the temperature measurement is out of the user specified range. Option 6 is used to enter the Temperature Set Points.
  • Page 67 Program Mode Advanced Access Option 7 — Alarm Setup The Series 255 supports up to two alarms. To access the Alarm Setup menu in Program mode: Press P. 1> Enter the Basic access code, and then press E. 2> Press 7 for the Alarm Setup menu, and then press E. 3>...
  • Page 68 Program Mode Advanced Access Option 8 — Totalizer Setup To access the Totalizer Setup menu in Program mode: Press P. 1> Enter the Advanced access code, and then press E. 2> Press 8 for the Totalizer Setup menu, and then press E. 3>...
  • Page 69 Program Mode Advanced Access Option 10 — Field Calibration Correction Factor This menu option (#10) is used to enter the Field Calibration Correction Factor (FCCF) and the Flow Filter Time Constant. The Field Calibration Correction Factor is a multiplier that is used as a bias correction on the flow average.
  • Page 70 Program Mode Advanced Access Option 11 — Variable Correction Factor Setup The Variable Correction Factor (VCF) is a velocity-dependent correction factor applied to the velocity average to account for velocity dependent deviations. Its value depends on the current velocity. VCF data is obtained by performing a field traverse of field calibration of the duct. To access the Variable Correction Factor (VCF) Setup menu in Program mode: Press P.
  • Page 71 Program Mode Advanced Access Repeat the process for each additional VCF data set. Option 12 — Run Mode Display Setup Run mode is the normal operational state of the Series 255. You can setup the information that appears on the display during Run mode. The default display information in Run mode is tag name, flow rate, and temperature.
  • Page 72 Program Mode Advanced Access Repeat the steps for Lines 2 and 3. The active field is identified by the ^ v characters that indicate 8> making a selection using the UP or DN key. Press P to move to the next active field. The prompt returns to the main Advanced mode menu after specifying Line 3.
  • Page 73 Program Mode Advanced Access Option 14 — Reference Temperature & Pressure To access the Reference Temperature & Pressure menu in Program mode: Press P. 1> Enter the Advanced access code, and then press E. 2> Press 14 for the Reference Temperature & Pressure menu, and then press E. 3>...
  • Page 74 Program Mode Advanced Access Option 16 — NE-43 Alarm Level The NE-43 alarm level sets the 4-20 mA outputs low level (3.6 mA) or high level (21.0 mA) to indicate an alarm or fault conditions. To access the NE-43 Alarm Level menu in Program mode: Press P.

  • Page 75: Table 4-3. Channel Ids And Corresponding Modbus Addresses

    Program Mode Advanced Access Option 17 — Modbus Communication The Series 255 communicates with the flow sensors using the Modbus RTU protocol over RS-485. The system can communicate with up to 16 flow sensors based on the Series 255 model. The flow sensors are designated as Channels A through P.
  • Page 76 Program Mode Advanced Access Option 18 — Serial USB Baud Rate A computer running a terminal emulator program (such as Tera Term) must be Note connected to the USB port to capture the data before using this option. Refer to Chapter 5 for information on using a terminal emulator and the USB port.

  • Page 77: Table 4-4. Channels Per Series 255 Model

    Program Mode Advanced Access Option 20 — Number of Channels To access the Number of Channels menu in Program mode: Press P. 1> Enter the Advanced access code, and then press E. 2> Press 20 for the Number of Channels menu, and then press E. 3>...
  • Page 78 Program Mode Advanced Access Option 21 — Channel Setup The Channel Setup menu allows assigning a flow sensing channel ONLINE or OFFLINE, and to INCLUDE or EXCLUDE its velocity and temperature measurement from the calculated average. To access the Channel Setup menu in Program mode: Press P.
  • Page 79 Program Mode Advanced Access Option 22 — User Access Codes To access the User Access Codes menu in Program mode: Press P. 1> Enter the Advanced access code, and then press E. 2> Press 22 for the User Access Codes menu, and then press E. 3>...
  • Page 80 Program Mode Advanced Access Option 23 — Analog Output Calibration The 4-20 mA outputs are calibrated per the customer’s initial order. However, it may be necessary to recalibrate the outputs after the system has been operating to ensure the output correctly represents the process measurements on a 4-20 mA scale.
  • Page 81 Program Mode Advanced Access Press the UP or DN key until the ammeter measures 20.000 mA. 6> For larger increments press the L key and then continue pressing the UP or DN key. Press E when the ammeter measures 20.000 mA. SLOPE OFFST 0.888...

  • Page 82: Option 25 - Ne-43 Alarm Test

    After using Option 26, Save to Auxiliary Configuration, use Restore Auxiliary Configuration to use the previously saved configuration data set. When the Series 255 leaves Kurz, the Auxiliary configuration data set is the same as Note the Factory configuration data set.

  • Page 83: Option 27 - Restore Factory Configuration

    Program Mode Advanced Access Option 27 — Restore Factory Configuration Restoring the Factory configuration data set makes it the active configuration. Restoring the Factory configuration erases any custom settings that have Important been implemented. To access the Restore Factory Configuration menu in Program mode: Press P.

  • Page 84: Option 29 - Output Report To Usb

    Program Mode Advanced Access Option 29 — Output Report to USB This option downloads a selected report in a readable text format to the USB port. The available reports that can be downloaded are: CURR CFG – Configuration data set currently in use AUX CFG –...

  • Page 85: Figure 4-1. Sample Configuration Output

    Program Mode Advanced Access MODEL 255C Configuration - EEPROM Memory 255CONFIG Serial Number 10000 Firmware Version BETA 2.04 Tag_ID PRIMARY AIR User Flow Unit SCMH Flow Area 1.00 SQM Gas Name Gas Mol Wt 28.96 G/MOL Ref Pres Ref Temp DEGC Factory 101.32...

  • Page 86: Figure 4-2. Sample Zero-Span Report

    Program Mode Advanced Access ZERO-SPAN REPORT 01/01/2018 15:18:32 255 SERIAL NUMBER 10148 ZERO-SPAN TEST RUN ON 01/01/2018 15:16:23 SYSTEM HAS ONE OR MORE FAULTS, ERROR CODE IS 0100 SYSTEM HAS 4 CHANNELS NUMBER OF CHANNELS IN AVERAGE ONE OR MORE CHANNELS FAULTED OR UNUSED OUTPUT CHECK PERCENT DATA...

  • Page 87: Option 30 - Usb Data Log Setup

    Program Mode Advanced Access Option 30 — USB Data Log Setup This option activates and deactivates data logging to the USB port. A computer/laptop running a terminal emulator program (such as Tera Term) must be connected to the USB port to capture the data. The data is logged on a fixed 1 second interval.

  • Page 88: Options 31 And 32 - Sensor Purge Cleaning

    Program Mode Advanced Access Options 31 and 32 – Sensor Purge Cleaning In applications with dust and dirt in the process gas stream, material can build up on the flow sensor creating an insulating layer around the sensing element. This dirt build up will cause the sensor to lose less heat and read lower than when it was calibrated.

  • Page 89: Option 32 - Purge Manual Command

    Program Mode Advanced Access Use the number keys to enter the purge interval and then press E. The interval can be 3 minutes 6> and up to 1440 minutes (24 hours). Option 32 – Purge Manual Command You can use Program Mode Option #32 to initiate a manual purge cycle as follows: Press P 1>...

  • Page 90: Options 33 Thru 35 - Zero/Mid/Span Check

    Program Mode Advanced Access Options 33 Thru 35 - Zero/Mid/Span Check The Zero/Mid/Span Check is a standard feature in the Series 255 that provides system wide checks of the connected flow elements and the drift characteristics of the 255 output signals. The test sequence is summarized below.
  • Page 91 Program Mode Advanced Access ZERO-SPAN REPORT 01/01/2018 14:55:28 255 SERIAL NUMBER 10148 ZERO-SPAN TEST RUN ON 01/01/2018 14:52:01 SYSTEM HAS ONE OR MORE FAULTS, ERROR CODE IS 0108 SYSTEM HAS 4 CHANNELS NUMBER OF CHANNELS IN AVERAGE ONE OR MORE CHANNELS FAULTED OR UNUSED OUTPUT CHECK PERCENT DATA...

  • Page 92: Option 33 - Zero-Span Schedule Setup

    Program Mode Advanced Access Option 33 – Zero-Span Schedule Setup The Zero/Mid/Span test can be setup to run automatically at a user defined time of day + number of days schedule. To access the Zero-Span Schedule Setup menu in Program mode: Press P 1>...

  • Page 93: Option 34 - Zero-Span Test Parameters Setup

    Program Mode Advanced Access Option 34 – Zero-Span Test Parameters Setup The Zero/Mid/Span test is a multi-stage test that checks the operational status of the flow elements as well as the drift characteristics of the 255 output signals. The 255 4-20 mA output signals are tested by driving a user specified low, mid-range, and high (Zero/Mid/Span) signal to both analog output channels.
  • Page 94 Program Mode Advanced Access Next, a prompt appears to enter the duration of the Mid Check Test. 9> CFG FOR MID CHECK % FULLSCALE > 50 SEC DURATION > 60 Use the number keys to enter the duration, in seconds, of the Mid Check test, and then press E. 10>...

  • Page 95: Option 35 - Zero-Span Manual Command

    Program Mode Advanced Access Option 35 – Zero-Span Manual Command The user can initiate a Zero/Mid/Span test manually in Program mode: Press P. 1> Enter the Advanced access code and then press E 2> Press 35, and then press E. 3>...

  • Page 96: Usb Connection For Terminal Emulators

    Chapter 5 USB Connection for Terminal Emulators Overview This chapter provides an example of connecting a terminal emulator (in this case Tera Term) to the USB port for capturing data. Series 255 Flow Averaging Transmitter Operations Guide 5–1...

  • Page 97: Usb Connection

    USB Connection for Terminal Emulators USB Connection The Series 255 includes a USB cable located behind the microprocessor board. The USB cable provides a direct connection between the Series 255 and a computer USB port. A terminal emulator program (such as Tera Term) must be running on the computer Note connected to the Series 255.

  • Page 98: Configuring Tera Term

    USB Connection for Terminal Emulators Configuring Tera Term Before using a terminal emulator (such as Tera Term), the Series 255 must be turned on and connected to the computer. Start TeraTerm. 1> Open a Serial Connection on the computer. 2> The New Connection dialog box appears.
  • Page 99 USB Connection for Terminal Emulators Select File Log to capture the logged data to a file. → 6> Enter a filename with a CSV extension and check Plain text. 7> Click Save. 8> Tera Term pushes the data appearing in the Tera Term window to a data file. To stop data logging to the file, click Close to save the file.

  • Page 100: Modbus Rs-485 Service Port

    RS-485 to USB to communicate directly with the flow meter sensors for service, troubleshooting, or programming changes. The computer must have a Modbus master application installed, such as the Kurz application KzComm (see the KzComm User’s Guide for additional information).

  • Page 101: Diagnostics & Troubleshooting

    Chapter 6 Diagnostics & Troubleshooting Overview This chapter provides diagnostic and troubleshooting for the Series 255 Flow Averaging Transmitter. The error handling of the Series 255 is designed to support the following alarm specifications: NAMUR Specification NE-43 • NAMUR Specification NE-107 •...

  • Page 102: Event Notification

    Diagnostics & Troubleshooting Event Notification There are several methods that the Series 255 uses to notify the user of system abnormalities: Messages appear on the local display as a text string. • Activating an alarm output. • Indicating as a low/high level on the 4-20 mA outputs (NE-43). •...

  • Page 103: Series 255 Alarm Outputs

    Diagnostics & Troubleshooting Table 6-1. System Events and Triggers (continued) Bit Code Event Text Trigger 0x80 WRN-ELEC TEMP OV LIM Electronics temperature of Series 255 board is over limit. 0x100 WRN-CHANNEL KICKOUT One or more channel is kicked out of the average. The Event Log contains a historical record of the last 260 fault events reported by the Series 255.

  • Page 104: Channel Kickout

    Diagnostics & Troubleshooting Channel Kickout There are several faults that can cause a flow sensor channel to be kicked out of the average. A flow sensor channel is kicked out of the average if its status error code from the Modbus query is non- zero.

  • Page 105: Data Quality Status Byte

    Diagnostics & Troubleshooting Table 6-3. Front Panel Status LEDs Description Category Description Device Message/ Event Advisory. Although the signal is valid, the Maintenance required CHANNEL KICKOUT remaining life is nearly exhausted or a function will (blue, oil can ELECT TEMP HI soon be restricted due to operational conditions.

  • Page 106: Series 255 Main Board Overview

    Diagnostics & Troubleshooting Series 255 Main Board Overview Series 255‐to‐sensor communications Power and communication connections LEDs indicators for communication for single‐point and multipoint flow meters with sensors and sensor configuration AC/DC power input connections Analog and digital Protective fuses inputs and outputs for zero‐mid‐span, alarm, and 4‐20mA connections Figure 6-1.

  • Page 107: Ac Power Connections

    Diagnostics & Troubleshooting AC Power Connections AC connector to power supply (connected at factory) ACC fuse AC fuse AC line termination (customer AC input) Figure 6-2. AC Power Connections DC Power Connections 24 VDC power (customer supplied or resident power supply output) DC fuse Figure 6-3.

  • Page 108: System Input And Output Communications

    Diagnostics & Troubleshooting System Input and Output Communications Digital inputs and outputs Analog outputs Figure 6-4. System Input and Output Communications Series 255 Flow Averaging Transmitter Operations Guide 6–8...

  • Page 109: System Communications Area

    Diagnostics & Troubleshooting System Communications Area 5‐pin mini USB port Backup battery for real‐time clock; Sensor communications and configuration field replaceable, non‐soldered (built-in USB to RS485 converter) RS‐485 communication TX LED flashes when Series 255 is transmitting a request RX LED flashes when Series 255 for sensor information is receiving sensor information Figure 6-5.

  • Page 110: Sensor Power And Communications Connections

    Diagnostics & Troubleshooting Sensor Power and Communications Connections Six isolated ports supply power to and exchange communications with sensors; each port supports one electronics enclosure; port use independent of sensor Modbus address ‐ any available port supports any channel function each enclosure supports up to four sensors with a maximum draw of 5 amps;...

  • Page 111: Troubleshooting

    Diagnostics & Troubleshooting Troubleshooting This section provides troubleshooting suggestions for the most common operating problems. Procedures and instructions in this section may require special precautions to ensure the safety of the personnel performing the operations. Refer to the following safety messages before performing an operation preceded by this symbol.

  • Page 112: Channel Kickout

    VEL 2.2 NMPS ONL TEMP 20.0 DEGC INC <----- Status code is non-zero = Error CHJ KURZ MFT 4025 VEL 0.0 NMPS ONL TEMP ****** DEGC INC A flow sensor channel is kicked out if the measurement units are not metric (SI units).

  • Page 113: Modbus Communication Between The Series 255 And The Flow Sensors

    Diagnostics & Troubleshooting A communication fault causes a flow channel data to be kicked out of the average. • A communication fault on a flow channel occurs if the flow sensor does not respond to Series 255 Modbus commands or if the response packet is not readable. When a communication fault occurs, the Series 255 does not perform a retry on a flow sensor but will continue to send cyclic commands.
  • Page 114 The LEDs on the main board provide valuable information on system operation. The Series 255 and • the Kurz flow sensors have two LEDs that indicate sending (Tx) and receiving (Rx) Modbus transmissions. The LEDs flash accordingly when receiving and sending commands or responses.
  • Page 115 Index analog output 3-3, 4-3 setup 3-9, 4-13 access codes 1-3, 1-7, 1-8, 1-9, 4-6, 4-30 test function 4-32 addresses, Modbus 4-6, 4-26 auxiliary configuration restore 4-7, 4-33 Advanced access 4-2 save 4-7, 4-34 4-20 mA calibration 4-13 access code 1-7, 1-9 access codes 4-6, 4-30 analog output setup 4-7, 4-13, 4-31 back out of menu 1-8, 1-9...
  • Page 116 number of 4-6, 4-28 H key 1-3 setup 4-6, 4-29 keypad 1-3 summary 2-2, 2-5 Maintenance Required indicator 1-5 temperature summary 2-2, 2-4 minus key 1-3 velocity summary 2-2, 2-5 Normal indicator 1-5 numeric keys 1-3, 1-4 character display description 1-2 operating modes 1-1, 1-6 character map 1-4 Out of Specification indicator 1-5...
  • Page 117 alarm triggers 6-3 keypad 1-3 Basic access 3-14, 4-18 Maintenance Required indicator 1-5 bit code events 6-2 Normal indicator 1-5 channel kickout 6-4 Out of Specification indicator 1-5 communication 6-4 status indicators 1-5 data quality status 6-5 function display messages 6-2 4-20 mA range 4-7, 4-31 Event log 6-3 access codes 4-6, 4-30...
  • Page 118 minus key 1-3 Modbus gas properties 2-3, 2-8 addresses 4-6, 4-26 general product description ii-ix baud rate function 4-6, 4-26 communications 4-6, 4-26 modes Advanced access 1-9, 4-2 H key 1-3, 1-8, 1-9 Basic access 1-8, 3-2 high alarm trigger 6-3 Display 1-3, 1-6, 2-2 historical record 6-3 Program 1-7, 3-1, 4-1...
  • Page 119 parity, USB 5-2 C key 1-3 channel kickout 6-4 password codes 1-3, 4-6, 4-30 channel setup 4-6, 4-29 period key 1-3 Check Function indicator 1-5 correction data factor sets 3-5, 4-5 plus key 1-3 data log setup 4-8, 4-38 pressure, reference 4-5, 4-24 data quality status 6-5 display 1-2 process data messages 1-2...
  • Page 120 setting the clock 3-5, 3-19, 4-5, 4-23 event line 6-2 status indicators 1-5 Event log 6-3 system operational state 4-6, 4-27 event notifications 6-2 tag name 3-3, 3-6, 4-3, 4-10 event triggers 6-2 totalizer setup 3-4, 3-15, 4-4, 4-19 fault events 6-2, 6-3 UP key 1-3 historical record 6-3 user access codes 4-6, 4-30...

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