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Technical Reference Manual LFXG-D

1. In Diagnostic TB 569 select the third entry of LINEARIZER_VALUE and type the process span value Repeat steps 11 through 16 until you have the desired number of linearizer data points In Diagnostic TB 569 select LINEARIZER_NUM_POINTS and type the number of LINEARIZER_COUNTS entries In Diagnostic TB 569 select LINEARIZER_SAVE_DATA and select Save Current Value Note Include the data for the Cal low and Cal high with the linearizer data before you perform Calculate linearity If you did not perform a linearizer data collect while the process was at the levels for Cal low and Cal high you can manually add those values to the linearizer data To add a data point to the linearizer data you must know the level in engineering units and the sensor counts LFXG D Technical Reference Manual 65 Calibration Step 4 Calculating the linearity Note The simple method of calibration does not use this step After collecting the data for a linearizer table the transmitter uses the data to calculate a new calibration linearizer table The Calculate Linearity function initiates this calculation You must perform this step before the Calculate Calibration step described in the next section Calculating a new linearizer table You can calculate the linearizer table using the Diagnostic TB 569 parameters Calculate the linearizer after you perform the following steps v Select non linear table for the linearizer curve w Col
2. For example 100 can equal the highest level of 100 feet e EU at 0 The value that represents the upper end of range maximum level of the process level sub parameter EU_0 For example 0 can equal the lowest level of 1 foot e Units Index The DD units code index for the engineering unit descriptor for the associated block value sub parameter UNITS_INDEX e Decimal The number of digits to the right of the decimal point that should be used by an interface device in displaying the specified parameter sub parameter DECIMAL LFXG D Technical Reference Manual 35 LFXG D setup Setting process value Procedure 1 To set the process value al From Process TB 449 click PRIMARY_VALUE_RANGE parameter 2 From the PRIMARY_VALUE_RANGE parameter click EU_100 sub parameter 3 Type the EU_100 value 4 From the PRIMARY_VALUE_RANGE parameter click EU_0 sub parameter 5 Type the EU_0 value 6 From the PRIMARY_VALUE_RANGE parameter click UNITS_INDEX sub parameter T Scroll and click on one of the following unit types e Counts per Second e Unitless e in e ft e cm e mm e m e 8 From the PRIMARY_VALUE_RANGE parameter click DECIMAL sub parameter 9 Type the number of places to the right of the decimal that you want to display Note The process transducer block 449 s PRIMARY_VALUE_RANGE units UNITS_INDEX sub parameter must match the units UNITS_INDEX in the Analog Input Al block sub parameter XD_SCALE and PV_
3. Resource block is out of service Block alarm active parameters Using external compensation If using external compensation and the compensation value does not update properly You receive frequent communication errors when you try to read or write to a device A device does not transmit alarms You are unable to write to a block parameter A device does not appear in the Project window You receive a status of Bad Device Failure A function block alternates between IMAN and AUTO modes The status of the input parameter is Bad No comm The Al does not transition to AUTO mode from OOS mode 102 Table 13 Fieldbus troubleshooting Possible Causes The resource block is in OOS mode Improper setup Invalid feature selection The device is in an invalid state You have not configured the alarms The parameter is read only The blocks are in an incorrect mode The data is out of range The communication parameters are incorrect An error exists with the hardware The function block and communication schedules do not have enough time between them The configuration is incorrect or incomplete Recommended Actions Set the target mode of the resource block to AUTO If the resource block is out of service nothing else can be in service The A O block units do not match the transducer block units A O block must be in cascade mode Verify that the SP High Lim and SP Low Lim are set
4. The allowable permitted modes for the block This is defined in the MODE_BLK TARGET sub parameter Options are e Auto Normal SUPPORTED_MODES e Oos In Process Setup and ROUT R Diagnostics TBs Rcas e Cas MAN LO e IMAN Mode Parameter Description R W Reserved er Mode Sub parameter Description R W HART_COMMAND_ERR_COUNT Reserved R HART_COMMUNICATION_ERR_COUNT Reserved R in Deo eis TB HART_COMMAND_ERR_COMMAND Reserved R HART_COMMUNICATION_ERR_COMMAND Reserved R HART_FUNCTION_ERR_COMMAND Reserved R HART_FUNCTION_ERR Reserved R HART_COMMUNICATION_ERR Reserved R HART_COMMAND_ERR Reserved R HART_RESET_INFO Reserved w In Diagnostics TB 134 LFXG D Technical Reference Manual Appendix IV Transducer menu and methods interface Calibration Process TB 449 Data Collect Method Advanced Functions LFXG D Technical Reference Manual Initial Calibration Relay Test Mode Method Two Point Calibration Cal Lo Method Cal High Method Calibrate Results Method Figure 22 Process transducer block Process Chain Primary Channel Method Aux Channel Method Process Variables Method 135 Appendix IV Transducer menus and methods interface Setup TB 508 Setup Block Functions Sensor Temperature Coefficients Method Sta
5. LFXG D setup System setup The system parameters define settings for the internal operation of the level transmitter and the radiation source Source functions can be set in the transducer block parameters System parameters System configuration requires the setup of the following e Source type e Source functions Source type Use the source type feature to view or enter the isotope in the source holder that produces the radiation signal The VEGA factory enters this parameter based on information received at the time of the order You can check the isotope type against the source holder label Procedure 4 To set the source type parameter 1 From Setup TB 508 click SOURCE_TYPE 2 Scroll and select one of the following radiation sources e Cs137 e Co60 e AM241 e CF252 e Nosource LFXG D Technical Reference Manual 43 LFXG D setup Source functions Source functions can be set in the transducer block parameters Complete the system configuration by setting up the following e Wipe interval e Shutter check interval Wipe interval Use the wipe interval feature to view or enter the interval in days between successive source wipe diagnostic alarms Check with current applicable regulations Record wipe now Use the record wipe feature to reset the diagnostic alarm source wipe due For more information see the Diagnostics and Repair chapter Shutter check interval Use the shutter check interval fe
6. AO_BLOCK parameters 49 To choose a linearizer method 58 Procedure 10 To perform a data collect 59 Procedure 11 To set the cal low level 61 Procedure 12 To set the cal high level 62 Procedure 13 To collect linearizer table data 64 Procedure 14 To calculate the linearizer 66 Procedure 15 To calculate the calibration results 67 Procedure 16 To standardize the gauge 69 Procedure 17 To view primary channel values 75 Procedure 18 To view process variables 77 Procedure 19 To view the auxiliary channel chain parameters 78 Procedure 20 To view the minimum and maximum history 78 Procedure 21 To reset the minimum and maximum history 79 Procedure 22 To acknowledge new hardware found message with new CPU board 80 Procedure 23 To repair corrupted EEPROM 81 Procedure 24 To start sensor test mode 83 Procedure 25 To exit sensor test mode 83 Procedure 26 To start auxiliary test mode 84 Procedure 27 To exit auxiliary test mode 84 Procedure 28 To start relay test mode 85 Procedure 29 To exit relay test mode 85 Procedure 30 To start temperature test mode 85 LFXG D Technical Reference Manual xi Preface Procedure 31 To exit Temperature test mode 85 Procedure 32 To view other advanced functions 87 Procedure 33 To select gauge type 88 Procedure 34 To view diagnostic alarms 95 Procedure 35 To record a source wipe 104 Procedure 36 To record a shutter check 104 Procedure 37 To view due date of s
7. Cal Low High Level Level Actual Level eng units Figure 16 Raw counts vs actual level with linearizers The internal software calculates a straight line between the Min Level and Max Level based on the Cal Low Level and Cal High Level LFXG D Technical Reference Manual 55 Calibration Start is LINEARIZER_TYPE No Change LINEARIZER_TYPE to set to table linear table linear Yes la Y f i process span set gt No Change correctly PRIMARY_VALUE_RANGE Yes e v Perform Setting cal low level and Setting cal high level procedures in any sequence Perform Calculating the calibration result procedure Figure 17 Simple method calibration flow chart 56 LFXG D Technical Reference Manual Calibration Choosing the linearizer type The level transmitter response curve is non linear due to the measurement method of radiation transmission The linearizer determines the shape of the compensation curve between the endpoints As part of the signal processing necessary to produce a linear final output with respect to the change in level of process material the level transmitter offers the following choices 1 Non linear table 2 Linear table Non linear table Use this option for a standard method calibration The non linear table is more accurate than the linear table This is because it the non linear table takes into account the inherent non linearity of a nuclear transmission measurement The non
8. DIAG_HISTORY_NEWEST_2 Sensor fail R DIAG_HISTORY_NEWEST_2 Process out of range R DIAG_HISTORY_NEWEST_2 Sensor voltage out of spec R Displays date of each of the oldest diagnostic error occurrence na Mode Sub parameter Description R W DIAG_HISTORY_OLDEST_1 RAM corrupt R DIAG_HISTORY_OLDEST_1 Sensor EEPROM corrupt R one a DIAG_HISTORY_OLDEST_1 FLASH corrupt R DIAG_HISTORY_OLDEST_1 Real time clock fail R DIAG_HISTORY_OLDEST_1 Sensor temp fail R DIAG_HISTORY_OLDEST_1 Standardize due R DIAG_HISTORY_OLDEST_1 Source wipe due R DIAG_HISTORY_OLDEST_1 New hardware found R Displays date of each of the oldest diagnostic error occurrence er Mode Sub parameter Description R W DIAG_HISTORY_OLDEST_2 Alarm Type 3 R DIAG_HISTORY_OLDEST_2 CPU EEPROM R ee DIAG_HISTORY_OLDEST_2 Alarm type 1 R DIAG_HISTORY_OLDEST_2 Alarm type 2 R DIAG_HISTORY_OLDEST_2 Shutter check due R DIAG_HISTORY_OLDEST_2 Sensor fail R DIAG_HISTORY_OLDEST_2 Process out of range R DIAG_HISTORY_OLDEST_2 Sensor voltage out of spec R DIAG HISTORY RESET Displays the date of the last diagnostic reset Ww In Diagnostics TB LFXG D Technical Reference Manual continued on next page 131 Appendix III Parameters Table 19 Transducer block parameters continued Mode Parameter Description R W MAX_SECONDARY_COUNTS Displays the maximum auxiliary input channel counts recorded s
9. EEPROM contains a backup of the other EEPROM The system monitors both EEPROMs at power up to assure an accurate backup If you install a new CPU board the EEPROM backups on the CPU and sensor boards do not match The software signals the discrepancy with the error message New Hardware Found The transmitter does not automatically perform a backup in case the discrepancy is not due to new hardware but some corruption of the EEPROM Note Only use the New Hardware functions if you replace the CPU board or receive an corrupt EEPROM message This function is not necessary if installing a completely new detector assembly The new detector assembly includes the CPU board and the sensor assembly Proper response to New hardware found message if new hardware has been installed When you install a new CPU board you must verify installation in the Diagnostics TB 569 parameters This function enables new backups of the EEPROMs If anew CPU board has been installed Procedure 22 To acknowledge new hardware found message with new CPU board 1 From Diagnostic TB 569 select COPY_NV_MEMORY 2 Select sensor main gt cpu backup 3 Wait 60 seconds for the transfer to complete 80 LFXG D Technical Reference Manual Advanced functions Proper response to New hardware found message if new hardware has not been installed CPU EEPROM Corrupt message or Sensor EEPROM Corrupt message If there has not been an installation of a new CPU board
10. LINEARIZER_VALUE parameters to verify the entries If the entries are invalid select DELETE_ALL_DATA_POINTS from Diagnostic TB 569 list and choose delete all data points This parameters automatically reverts back to idle In Diagnostic TB 569 select LINEARIZER_SAVE_DATA In Diagnostic TB 569 select Reset to Saved Values This parameter automatically reverts back to idle In Diagnostic TB 569 read the LINEARIZER_COUNTS and LINEARIZER_VALUE arrays Each of these arrays contain 11 entries each element of the LINEARIZER_VALUE array has a corresponding LINEARIZER_COUNTS element In Diagnostic TB 569 select LINEARIZER_COUNTS In Process TB 449 select COUNTS_LOW and type the value into the first entry In Diagnostic TB 569 select the first entry of LINEARIZER_VALUE and type the 0 of span value In Diagnostic TB 569 select the second entry of LINEARIZER COUNTS In Process TB 449 select COUNTS_HIGH VALUE and type the value into the first entry In Diagnostic TB 569 select the second entry of LINEARIZER_VALUE and type the 100 of span value Perform the data collect procedure on page 59 to get the average counts for a new process level setting In Diagnostic TB 569 select the third entry of LINEARIZER_COUNTS LFXG D Technical Reference Manual Calibration 15 16 17 18 19 Procedure 13 To collect linearizer table data continued In Process TB 449 select AVERAGE_COUNTS and type the value of the new data collect
11. Shutter Check Now 128 Record wipe 44 Record Wipe Now 128 Relay Alarm Mask 122 Relay Status Test 122 Relay test mode 85 Relay Value 122 Repair procedures field 105 repairs returning equipment to VEGA 107 Resource block 116 e sample type 116 SD source decay counts 73 Secondary filter value 47 Select gauge location 86 Select gauge type 88 Sensor counts 73 Sensor EEPROM corrupt in diagnostic history 94 sensor fail in diagnostic history 94 Sensor serial number 86 sensor temperature in diagnostic history 94 Sensor Temperature Co efficients 130 Sensor test mode 83 Sensor Test Mode 130 Sensor voltage 86 LFXG D Technical Reference Manual Sensor voltage out of spec in diagnostic history 94 set high level 62 Set low level 61 setting input filter and comp type 49 Setting source type 43 Setting x ray alarm 46 Setup Basic level requirements 33 Setup TB 508 sub menus 136 shutter check frequency 103 recording when complete 103 setting the interval 44 Shutter check due in diagnostic history 94 Shutter check interval 44 signal cable 22 Source decay gain displayed in process chain 76 source holder 9 source holder lock 23 Source type 43 source wipe frequency 102 103 recording when complete 103 setting the interval 44 source wipe due in diagnostic history 94 span process 35 spare parts 105 special applications 109 specifications heater kit changes 109 L
12. Standards Institute ANSI represents the United States in the ISO Local area network A communications network that is limited in physical spatial area for the purpose of easier connection of computers in neighboring buildings continued on next page LFXG D Technical Reference Manual Appendix II Glossary Table 18 Terms and meanings continued Term Meaning LAS Link active scheduler A device that is responsible for keeping a link operational The LAS executes the link schedule circulates tokens distributes time and probes for new devices Link A group of fieldbus devices that connect across a single wire pair Link active schedule Link identifier Link master device Linkage Link object Loop m Macrocycle Network management Non scheduled acyclic communication Non volatile memory LFXG D Technical Reference Manual with no intervening bridges A schedule of times in the macrocycle when devices must publish their output values on the fieldbus A number that specifies a link A device that is capable of becoming the LAS A link master device controls the communications traffic on a link It prevents multiple devices from communicating data at the same time A connection between function blocks An object resident in a device that defines connections between function block input and output across the network Link objects also specify trending connections A set of connections between b
13. any way There is no requirement for special firmware e The factory installs the internal heater kit if you order it with the LFXG D e Three different kits are available one for 115VAC one for 220VAC and one for 24VDC The part numbers are shown below Table 15 Heater kit part numbers Heater kit power O V Part Number 115VAC 240723 220VAC 240724 24VDC 241912 Changes to specifications The power rating changes from the specifications on page 5 of this manual when you install the heater kit on the LFXG D With the installation of the heater the maximum power consumption increases to 25W The unit is either 115VAC 10 or 220VAC 10 instead of the standard 90 270VAC range or 24VDC LFXG D Technical Reference Manual 109 Appendix l Special applications Notes 110 LFXG D Technical Reference Manual Appendix Il Glossary Tables 17and 18 list the terms meanings and values for the LFXG D and fieldbus system Table 16 Measurements and values Term Meaning Value m Milli 10 c Centi 107 k Kilo 10 M Mega 10 Table 17 Terms and meanings Term Meaning A Amperes Al Analog input A type of function block Alarm A notification the communications manager software sends when it Alarm conditions Alert Alert function Alert objects Analog network AO ASCII detects that a block leaves or returns to a particular state A notification that a fieldbus device sends to another fieldb
14. are WwW etup Use Lab sample value Use Default value The default standardization value in engineering units displayed e a iia ZE DEFAULT VALUE during a standardize procedure This default may be overridden Ww P during the procedure Recalculate new calibration parameters based on CAL_POINT_HI CAL_POINT_HI_COUNTS CAL_POINT_LO CALCULATE_CALIBRATION_NOW and CAL_POINT_LO_COUNTS w In Process TB Choices are no calibration calculation e calculate calibration now ae ao ee Data collection interval is the time in seconds over which the w P system averages the sensor counts Specifies the difference between the Cal low value and Cal high EA e as a percent of span that will cause a warning to appear during a W P calibration CAL_POINT_LO_DATE Date when the CAL_POINT_LO_COUNTS were acquired Enter w In Process TB as MM DD YY and HH MM SS ee The lowest calibrated value Ww In Process TB CAL FOINT TO GOUNTS Averaged sensor counts for the calibration on low process W In Process TB 126 continued on next page LFXG D Technical Reference Manual Appendix Ill Parameters Table 19 Transducer block parameters continued Mode Parameter Description R W CAL_POINT_HI_DATE Date when the CAL_POINT_HI_COUNTS were acquired Enter as w In Process TB MM DD YY and HH MM SS CAL POINT_HI The highest calibrated value WwW In Process TB CAL_POINT_HI COUNTS Averaged sensor c
15. are made in the QUALITY SUBSTATUS and Limits sub parameters Choices are Bad SECONDARY VALUE QUALITY e Uncertain w In Process TB Good_Noncascade Good_Cascade Choices are NonSpecific LastUsableValue e SubstituteValue SUBSTATUS e InitialValue w e SensorConversionNotAccurate e EngUnitRangeViolation e Subnormal Choices are e NotLimited LIMITS e LowLimited Ww e HighLimited e Constant Specify the span and units for the auxiliary input channel Sub Aen Mode parameter Beseripilon R W EU 100 The engineering unit value that represents the upper w end of range of the associated block parameter EU 0 The engineering unit value that represents the lower w z end of range of the associated block parameter SECONDARY_VALUE_RANGE Device Description DD units code index for the In Process TB engineering unit descriptor for the associated block value This unit must match the AO block units UNITS INDEX Choices are ue e Counts per Second Unitless The number of digits to the right of the decimal point DECIMAL that should be used by an interface device in Ww displaying the specified parameter continued on next page LFXG D Technical Reference Manual 121 Appendix III Parameters Table 19 Transducer block parameters continued Parameter Description Mode R W SECONDARY_STATUS In Process TB Indicates the status of the auxiliary input The input is either ON
16. determines the best sequence The simple calibration method skips Step 3 and 4 If using the standard calibration method you may find it helpful to record the sensor counts and levels at each step on Table 6 Table 6 Standard calibration sensor counts and levels record Data Point Sensor counts Actual level eng units Cal low level usually empty Linearizer data point 0 Linearizer data point 1 Linearizer data point 2 Linearizer data point 3 Linearizer data point 4 Linearizer data point 5 Linearizer data point 6 Linearizer data point 7 Linearizer data point 8 Linearizer data point 9 Cal high level usually full Linearizer data point 10 60 LFXG D Technical Reference Manual Calibration The two point calibration can be performed from the Process TB 449 parameters or from the Process TB 449 main menu Step 1 Set low level Setting the low level for calibration requires the following activities e Measurement with the level transmitter of the low process level e Entry of the actual level This sets the low end sometimes referred to in the U S as zero of the calibration curve Perform this procedure either before or after setting the high level Note You must perform data collection for the low and high level within ten days of each other for a good calibration The low and high values must be more than 10 percent of the process span apart for the most accurate calibration Increasing the process span us
17. displays LFXG D Technical Reference Manual 75 Advanced functions Process variables Use the Process TB 449 parameters to verify proper functionality of the software The Process Variable feature displays the following values e Counts low e Counts high e Cal high point e Cal low point e Temperature compensation gain e Source decay gain e Standardize gain Counts low COUNTS_LOW Displays the sensor counts at the minimum level Counts high COUNTS_HIGH Displays the sensor counts at the maximum level Cal high point CAL_POINT_HI Displays the maximum level that is the value in process units as entered in the TB parameters Use this to calculate the measurement span Cal low point CAL_POINT_LO Displays the minimum level that is the value in process units as entered in TRANSDUCER BLOCK parameters Use this to calculate the measurement span Temp comp gain TEMP_COMP_GAIN Displays the gain term applied to the raw sensor counts Use this to adjust for inherent sensor output change with temperature Source decay gain SOURCE_DECAY_GAIN Displays the current value of the source decay gain Use this to compensate for the natural decay of the radiation source that produces a lower field over time 76 LFXG D Technical Reference Manual Advanced functions Standardize gain STANDARDIZE_GAIN Displays the current value of the standardize gain that adjusts with each standardize procedure Procedure 18 To view proc
18. into the final output Auxiliary input is configured in the Process TB 449 parameters Secondary filter value Secondary filter value is the auxiliary input signal with application of the time constant The filter type RC or digital applied to the auxiliary input is the same as the primary channel Compensation type selection The software provides special settings for three typical uses of a frequency input e Summation mode e NORM compensation e Vapor pressure compensation LFXG D Technical Reference Manual 47 LFXG D setup Compensation source This parameter defines the source of the compensation input frequency There are two types of compensation sources e Compensation input frequency supplied by a frequency gauge wired to the auxiliary input Al of the Foundation Field gauge pins 11 and 12 of the power supply terminal block e Compensation input frequency supplied from the auxiliary output AO block of the gauge Setting the auxiliary input filter and compensation type Procedure 7 To set the auxiliary input filter and compensation type 1 From Setup TB 508 click SECONDARY_FILTER_VALUE 2 Type the value 3 From Setup TB 508 click COMPENSATION_SELECT 4 Select one of the following 48 Undefined None NORM Compensated Lvl Vapor Compensated Lvl Summation LFXG D Technical Reference Manual LFXG D setup Setting the compensation source There are two choices for compensation sources with Auxili
19. last standardization Standardize type Process standardize type determines how you enter the actual process value of a standardize sample If this is set as Use Lab sample value the software screens prompts entry of the sample value during a standardize If this is set as Use Default value the software always uses the Default standardize level as the sample value Standardize default value Default standardize is the default level value in engineering units that you use in the standardization procedure At standardization enter the actual level of the process material to override this default Standardize interval Standardize interval is the interval in days between standardize alarms The level transmitter alarms to indicate that a standardize procedure is due if the diagnostic alarm Standardize due is set 38 LFXG D Technical Reference Manual LFXG D setup Setting the calibration parameters 1 a 1 b 4 a 4 b 5 a 5 b Procedure 2 To set the calibration parameters Set up the Data Collect parameter From Setup TB 508 click DATA_COLLECT_INTERVAL Type the time in seconds that the system will use to average the sensor counts Set up the Warning Delta parameter From Setup TB 508 click WARNING_DELTA Type the difference between the two calibration points cal low and high level values as a percent of level span that causes a warning to appear The default value is 10 Set up the Process Standardization Confi
20. opinion Please fill out this page so that we can continually improve our technical documentation Manual LFXG D Technical Reference Manual Date Customer Order Number How we can contact you optional if you prefer to remain anonymous Name Title Company Address Did you find errors in this manual If so specify the error and page number Did you find this manual understandable usable and well organized Please make suggestions for improvement Was information you needed or would find helpful not in this manual Please specify Please send this page to VEGA Americas Inc Director of Engineering 4241 Allendorf Drive Cincinnati OH 45209 1599 LFXG D Technical Reference Manual xvii Preface Notes xviii LFXG D Technical Reference Manual Preface Customer Service VEGA has Field Service Engineers or Radiation Safety Officers available for onsite service emergency services or equipment start up Contact Information Telephone Number Monday through Friday 8 00 A M 5 00 P M 1 513 272 0131 EST Eastern Standard Time Emergencies Follow the voice mail 1 513 272 0131 instructions Fax 1 513 272 0133 Have this information ready e VEGA Customer Order C O Number located on the source holder s engraved label e Sensor s serial number e Located on the gauge s housing inside the external housing LFXG D Technical Reference Manual xix C
21. test mode Procedure 29 To exit relay test mode 1 From Process TB 449 select RELAY_STATUS_ TEST 2 Type 0 and click OK to exit test mode Temperature test mode The temperature test mode enables the user to manually force the LFXG D sensor temperature probe output to a specified value This is useful for verifying the scintillator sensor temperature compensation Starting temperature test mode Procedure 30 To start temperature test mode 1 From Diagnostic TB 569 select TEMPERATURE_TEST_MODE 2 Select In test mode oh Select TEMPERATURE_VALUE 4 Type in the new temperature value Exit temperature test mode Procedure 31 To exit Temperature test mode 1 From Diagnostic TB 569 select TEMPERATURE_TEST_MODE 2 Select Normal mode LFXG D Technical Reference Manual 85 Advanced functions Other advanced functions When performing diagnostics it may be important to know the following information e Sensor voltage high voltage monitor e Version of firmware on the FLASH installed on the level transmitter e Hardware version number e CPU serial number e Sensor serial number e Sensor temperature coefficients e Sensor location Sensor voltage HIGH_VOLTAGE_MONITOR Displays the scintillator sensor voltage Firmware version FIRMWARE_VERSION Displays the firmware version number Hardware version HARDWARE_VERSION Displays the hardware version number CPU serial number CPU_SERIAL_NUMBER Displays the CPU serial numb
22. to Counts Low Std wW In Process TB Counts at last standardize Indicates percent change from calibration STANDARDIZE_INTERVAL Standardize interval is the time in days between standardize due diagnostic messages Set it as the desired interval between R In Setup TB standardizes TEMP_COMP_REF_TEMP Reference temperature value for a temperature compensated density R In Setup TB measurement RESERVED_4 boots In Setup TB Reserved for density applications R RESERVED_5 bas In Setup TB Reserved for density applications R RESERVED_6 eats In Setup TB Reserved for density applications R RESERVED_7 i o In Setup TB Reserved for density applications R SENSOR_TEMP_COEFF0 In Setup TB Factory setting for the sensor temperature compensation curve R SENSOR_TEMP_COEFF1 i In Setup TB Factory setting for the sensor temperature compensation curve R SENSOR_TEMP_COEFF2 In Setup TB Factory setting for the sensor temperature compensation curve R SENSOR_TEMP_COEFF3 In Setup TB Factory setting for the sensor temperature compensation curve R Enable or disable the sensor test mode If enabled the sensor counts SENSOR_TEST_MODE are specified by the variable PRIMARY_RAW_COUNTS In Diagnostics TB Choices are Ww e Normal mode e In test mode Enable or disable the auxiliary input channel test mode If enabled the SECONDARY TEST MODE ae are specified by the variable SECONDARY_COUNTS T In Diagnostics TB e N rmalitiode e In test mode Select the sen
23. used w In Diagnostics TB 128 continued on next page LFXG D Technical Reference Manual Appendix Ill Parameters Table 19 Transducer block parameters continued Mode Parameter Description R W Confirms that the auxiliary channel data collect counts are to be used for the auxiliary input low calibration Write the value of SECONDARY_SET_LO_CAL AUX_COUNTS to SECONDARY_LO_CAL_COUNTS w In Diagnostics TB Choices are e idle set lo cal now Confirms that the auxiliary channel data collect counts are to be used for the auxiliary input high calibration Write the value of SECONDARY_SET_HI_CAL AUX_COUNTS to SECONDARY_HI_CAL_COUNTS w In Diagnostics TB Choices are e idle set hi cal now SECONDARY_MULT_COEFF_A i Ea In Setup TB Auxiliary compensation input parameter Ww SECONDARY_MULT_COEFF_B a bon i In Setup TB Auxiliary compensation input parameter WwW SECONDARY_CUST_COEFF_A A cdl In Setup TB Auxiliary compensation input parameter Ww SECONDARY_CUST_COEFF_B 7 or In Setup TB Auxiliary compensation input parameter Ww SECONDARY_CUST_COEFF_C vi er In Setup TB Auxiliary compensation input parameter WwW Force the non volatile memory in the gauge to be updated with the current configuration This is used to resolve NEW HARDWARE FOUND errors or used when a new CPU or sensor is installed COPY_NV_MEMORY Choices are In Diagnostics TB R idle Ww e CPU main sensor b
24. when a compensation mode is enabled or OFF SECONDARY_DATA_COLLECT In Process TB Perform a data collect for the auxiliary input channel Show the averaged counts when done Choices are no collection e execute SECONDARY_WRITE_CAL In Process TB Write the auxiliary input channel calibration values This is done after the SECONDARY_LO_CAL_COUNTS and SECONDARY_HI_CAL_COUNTS values are written Choices are e no secondary write calibration help e execute Indicates the status of the relay If 0 the relay is de energized If 1 the relay is energized Sub parameter Description Mode R W RELAY_VALUE In Process TB VALUE Displays the relay value R STATUS Displays the status of the value QUALITY Displays the quality of the information SUBSTATUS Displays the sub status of the information LIMITS Displays the limits if any DD d d RELAY_STATUS_TEST In Process TB Enable or disable relay test mode Choices are e O disable 1 relay on e 2 relay off RELAY_ALARM_MASK In Process TB Specifies which alarms the relay does not respond to Choices are RAM Corrupt Sensor EEPROM corrupt FLASH corrupt Real time clock fail Internal Temperature sensor failure STDZ due Source wipe due X ray detected CPU EEPROM corrupt Not Used Not Used Shutter check due New hardware new CPU Reserved Reserved Calibration error Sensor fail Proces
25. your specific host software manual for information on how to set the static parameters To setup the Transducer blocks and Al block parameters refer to Chapter 4 LFXG D setup on page 31 Step 8 Configure input output Sensor and actuator I O typically models as a transducer block Refer to your specific host software manual for information on how to configure the input and output blocks Step 9 Set network parameters You must configure the fieldbus communication specific network parameters for communication and scheduling to function properly Refer to your specific host software manual for information on how to configure the network parameters 30 LFXG D Technical Reference Manual Chapter 4 LFXG D setup This chapter includes the specific procedures necessary to setup the VEGA nuclear level gauge Using VEGA s Foundation Fieldbus Device Description DD you can view or edit the variables in VEGA s Foundation Fieldbus gauge transducer block in two of the following ways e Use the transducer blocks variable list directly e Use menus provided by VEGA s DD The menu structure in VEGA s DD provides an easier access to the most commonly used variables and methods Under the menus the variables are separated by functions such as e Setup parameters e Information parameters e Calibration parameters The procedures in this manual describe both methods of viewing and editing transducer block variables LFXG D
26. 0133 Web site www vega americas com WARNING Use this equipment only in the manner that this manual describes If you do not use the equipment per VEGA specifications the unit is not CE compliant and may be damaged or cause personal injury Preface Contents Explanation of symbols xiii Foundation Fieldbus system xv User s comments xvii Customer Service Error Bookmark not defined U S and Canada Error Bookmark not defined Worldwide Error Bookmark not defined Have this information ready xix CHAPTER 1 INTRODUCTION 1 Nuclear materials notice 1 Unpacking the equipment 2 Storing the equipment 3 Storing the source holder 3 Storing the gauge 3 Certifications 3 Safety Information for EX Areas 4 LFXG D specifications 5 Where to find help 7 VEGA Customer Service 7 Principle of operation 8 System overview 8 Scintillator model LFXG D 10 What is Fieldbus 11 Links 11 Devices 11 Link master 12 Basic device 12 Bridge 12 Device identification 12 Blocks and parameters 12 Device description files 13 Identifying blocks 13 Linkages 13 CHAPTER 2 INSTALLATION 15 Testing on the bench 15 Location considerations 16 Stable temperature 16 Protect insulation 16 ii LFXG D Technical Reference Manual Preface Avoid internal obstructions 17 Avoid external obstructions 17 Avoid source cross talk 17 Mounting the measuring assembly 18 Mounting Options 18 Bracket Mount 18 Conduit Mount 18 Wiring t
27. 89 Process alarm 89 X ray alarm 90 Status 91 Diagnostic alarms and fieldbus messages 91 Status diagnostics 91 Summary of diagnostic alarm conditions 92 Process alarm 93 X ray alarm 93 History information 94 Viewing diagnostic history 95 Hardware diagnostics 96 Test points 98 Jumpers 98 Power supply board LED indicators 98 CPU board LED indicators 99 Troubleshooting 101 Summary of fieldbus troubleshooting 102 Maintenance and repair 103 Periodic maintenance schedule 103 Source wipe and shutter check recording 103 Spare parts 105 Field repair procedures 105 Replacing the CPU or Power supply board 105 Requesting field service 107 Returning equipment for repair to VEGA 107 APPENDIX I SPECIAL APPLICATIONS 109 Internal heater kit for applications requiring a rating of 50 C 109 APPENDIX II GLOSSARY 111 APPENDIX Ill PARAMETERS 117 APPENDIX IV TRANSDUCER MENU AND METHODS INTERFACE 135 INDEX 139 LFXG D Technical Reference Manual v Preface Notes vi LFXG D Technical Reference Manual Preface Tables Table 1 Revision history 0 cccceccceceeeeeeeeeeeeeee cee eeseaeeeseeeeseaeeesaeeseneeeeaees i Table 2 Explanation of symbols 0c ccesceeeeeeceeeeeeeeeeeeeeeseeeeeeaeeeenees xiii Table 3 LFXG D SpecifiCations 0 cceceeceeeeeeeceeeeeeeaeeeeeeeseeeeseaeeeeeeeeaes 5 Table 4 Contact information c cccscceceesceceeeeenneeeeseaeeeeseaeeeseeneeseeeeaas 7 Table 5 Terminal names and descrip
28. AM corrupt 5 Flash memory corrupt ON solid Combination of errors None LED does not blink CPU not functioning None Off high voltage is outside of specification None Recommendation Check software diagnostics Call VEGA Field service Check Fieldbus device connection on loop and Fieldbus device Check power input Replace CPU board Check auxiliary input wiring terminals 11 and 12 with a meter for frequency signal Check auxiliary input equipment Call VEGA Field Service Check for closed source shutter buildup and or insulation LFXG D Technical Reference Manual Diagnostics and repair Troubleshooting The following tables and flow charts may be useful to determine the source of a problem They cover these topics e Fieldbus communication problems e LFXG D transmitter not responding Hardware troubleshooting is available at the board not the component level Essentially only the following two hardware components are field replaceable e CPU board e Power supply board Fieldbus physical layer setup diagnostics Perform the following steps to establish or troubleshoot Foundation Fieldbus communications with an VEGA nuclear gauge To establish or troubleshoot communications e Review the wiring to any devices on the Fieldbus segment VEGA recommends the use of 18 gauge shielded cable total cable including spurs not to exceed 1900 meters Make sure there are exactly two terminators on t
29. COMPENSATION_ SELECT Uunap lined In Process TB None w e NORM compensation Lvl e Vapor compensation Lvl e Summation Specify the source of the compensation value when a compensation mode is enabled This value can be internal calculated from the aux input or external using COMPENSATION_VALUE COMPENSATION SOURCE Choices are w In Process TB undefined e none e internal external This value is only valid if the COMPENSATION_SOURCE is set to external If so this variable is the value from the external device Sub i Mode parameter Besctiption R W ee ION_VALUE VALUE Displays the compensation value R STATUS Displays the status of this value R QUALITY Displays the quality R SUBSTATUS Displays the sub status R LIMITS Displays the limits if any R 120 continued on next page LFXG D Technical Reference Manual Appendix Ill Parameters Table 19 Transducer block parameters continued Mode Parameter Description R W The secondary value related to the sensor Sub kgs Mode parameter Besenption R W A numerical quantity entered by a user or calculated oe by an algorithm we Digital transducers unlike their analog versions can detect faults that make the measurement bad or prevent the actuator from responding This additional valuable information will be passed alon STATUS with each transmission of a data value in the form of A a status attribute Choices
30. Cal Low and Cal High samples as close as possible to the Min Level and Max Level to maximize the accuracy within the span The linearizer curve maps on two axes so that it indicates Count Range vs Span as shown in Figure 14 To construct the linearizer table a data point calculates for every 2 5 of the span View or edit these points in the Linearizer table feature 100 Standard 0 100 Figure 14 Count range vs span shown in linearizer table LFXG D Technical Reference Manual 53 Calibration Is linearizer set to table nonlinear Change LINEARIZER_TYPE to Table nonlinear Is process span set correctly Change PRIM ARY_VALUE RANGE Perform Setting cal low level and Setting cal high level procedures in any sequence Perform Collecting linearizer table data procedure Perform Calculating the linearizer procedure Perform the Calculating the calibration result procedure Figure 15 Standard method calibration flow chart 54 LFXG D Technical Reference Manual Calibration Simple calibration method The simple method of calibration does not require collection of intermediate data points Based on the Cal Low Level and Cal High Level the internal software calculates a straight line between the Min Level and Max Level Cal Low Counts Standard Raw Sensor Counts Cal High Counts Max Level Cal
31. D Technical Reference Manual 27 Fieldbus configuration Typical configuration for fieldbus system includes the following e Connect the devices in a segment e Import the device descriptions DD to the host e Set addresses and tags e Formulate a control strategy e Schedule function blocks and communication e Configure alarms e Set static parameters e Configure input output e Set network parameters Use your specific host software manuals to perform the configurations Step 1 Connecting the devices You must wire the LFXG D to the fieldbus network Step 2 Import the device descriptions Refer to your specific host software manual for information on how to download the VEGA device descriptions Step 3 Set address and tags Each device has a physical device tag and a fieldbus network address You must assign a unique tag to each device Each address must be unique within a fieldbus segment Each device has function blocks that perform control functions such as e Al e AO Devices also have transducer blocks that perform I O with sensors and actuators You must assign a unique tag to function and transducer blocks Setting a device or block tag can affect how other host machines on an online operating network access the device Caution Take care when you set the tags Verify that the operating control system is not using the device or function block When you set the device tag the device loses all linkage and
32. FXG D 5 standardization reminder 68 standardize default value 38 standardize due in diagnostic history 94 standardize gain 68 Standardize gain displayed in process chain 77 standardize point 38 standardize type 38 standardizing the gauge 69 Stdz standardize counts 73 storage 3 Symbols xiv system overview 8 System parameters 43 System setup 43 pae tag 113 Tag 116 TC temperature compensated counts 73 Temp sensor temperature 72 Temp comp gain 76 temperature coefficients 86 Temperature test mode 85 Temperature Test Mode 130 Temperature Value 130 141 Index terminal 20 Test modes 82 Test points 98 testing 15 Threshold 46 Transducer block parameters 118 Transducer blocks 117 Troubleshoot communications 101 Troubleshooting 101 Troubleshooting summary 102 a eea Uniformity Gain 129 _y VEGA Customer Service 7 Field Service 7 VEGA Field Service 1 107 VEGA Parts and Repairs 105 142 W Warning Delta 37 Wipe interval 44 wiring 19 X x ray alarm 90 setting parameters 46 X ray alarm 93 LFXG D Technical Reference Manual VEGA VEGA Americas Inc 4170 Rosslyn Drive Cincinnati Ohio 45209 USA Phone 1 513 272 0131 Fax 1 513 272 0133 E mail americas vega com www vega americas com All statements concerning scope of delivery application practical use and operating conditions of the sensors and processing
33. GA s DD provides an easier access to the variables Under the menus the variables are separated by functions such as e Setup parameters e Information parameters e Calibration parameters Note Not all host systems support this menus capability If your host does not support menus but does support methods refer to the host software documentation to find out how to execute the methods Methods are short procedures that manipulate multiple variables in order to perform a specific function such as calibration or linearization Methods provide a simple organized procedure for these functions VEGA s Foundation Fieldbus Device Description DD includes many methods to help setup the gauge Throughout this manual when a procedure is given that references the menus interface the name of the corresponding method is also provided so that if the host does not support menus you may be able to find the method by name On some host systems when these methods are executed you may experience a long delay three to four minutes before the method is actually run This delay is caused by the host system which is reading all parameters of the gauge over 200 of them before executing the method The procedures in this manual describe both methods of viewing and editing transducer block variables LFXG D Technical Reference Manual XV Preface Notes xvi LFXG D Technical Reference Manual Preface User s comments VEGA values your
34. ISTORY_DATE Displays the date for the standardization R In Diagnostics TB STDZ_HISTORY_DATE Displays the date for the standardization R STDZ_HISTORY_DATE Displays the date for the standardization R STDZ_HISTORY_DATE Displays the date for the standardization R STDZ_HISTORY_DATE Displays the date for the standardization R Displays the PV that was specified for each standardization er Mode Sub parameter Description R W Displays the PV specified for the STDZ_HISTORY_PROCESS standardization R STDZ HISTORY PROCESS STDZ HISTORY PROCESS Displays the PV specified for the R In Diagnostics TB standardization Displays the PV specified for the STDZ_HISTORY_PROCESS standardization R Displays the PV specified for the STDZ_HISTORY_PROCESS standardization R STDZ_HISTORY_PROCESS Displays the PV specified for the R standardization 132 continued on next page LFXG D Technical Reference Manual Appendix Ill Parameters Table 19 Transducer block parameters continued Mode Parameter Description R W Provides the calculated gain term for each recorded standardization eer Mode Sub parameter Description R W Provides the calculated gain term for the SIDA HISTORY GAIN standardization i STDZ HISTORY GAIN STDZ HISTORY GAIN Provides the calculated gain term for the R In Diagnostics TB standardization Provides the calculated gain term for the STDZ_HI
35. If your level transmitter indicates PV or Density as the process variable it was set incorrectly for a level type application Select gauge type enables the users to set the software to operate as either a density or a level gauge Procedure 33 To select gauge type ie From the Process TB 449 select DEVICE_SELECT 2 Select Level Si In order to have the proper gauge DD running remove the VEGA gauge from the host device list and then re initialize the gauge with the host 4 Verify that the correct DD is operating by selecting the gauge RESOURCE_BLOCK and view the MANUFAC _ID parameter The parameter value should say VEGA Level 88 LFXG D Technical Reference Manual Chapter 7 Diagnostics and repair Software diagnostics The level transmitter system can alert users to potential problems by e Posting messages on the screen e Tracking the current status and history in the Status feature Three classes of alarms are available to track the status and history in the Status feature These alarms are 1 Diagnostic 2 Process 3 X ray Diagnostic alarm The diagnostic alarm feature provides information about the level transmitter system and alerts the user when periodic procedures are due Process alarm The process alarm enables an alert to be generated when the process level is either above or below the process span LFXG D Technical Reference Manual 89 Diagnostics and repair X ray alarm The x ray alarm feature ge
36. Input Capability Electronics Diagnostics 1 of span typical Flexible detector Cesium 137 Cobalt 60 AC DC Wiring Maximum length FB signal 4 wire hookup with DC Safety information for EX areas Ambient temperature Humidity Vibration Material Paint Housing detector Software user settable Rating Fieldbus Protocol Type Possible function On board memory LED indication Introduction specifications Table 3 LFXG D specifications Accuracy depends on specific application parameters 305 7 010mm 12 276 in 305mm 12 increments 0 66MeV gamma radiation emitter 30 2 year half life 1 2 amp 1 3MeV gamma radiation emitter 5 3 year half life 90 254VAC at 50 60 Hz at 15W without heater or 25W with optional heater maximum power consumption CE compliance requires 100 230 10 VAC The fieldbus gauge uses 0 3W of power from the fieldbus power supply 20 60VDC less than 100mV 1 1 000 Hz ripple at 10VA CE compliance requires 24VDC 10 Type A 1 02mm 18AWG or Type B 22AWG with insulation suitable for at least 250V Type A 1 900m 6 232 Type B 1 200m 3 936 1 02mm 18AWG shielded twisted pair Type A 1 02mm 18AWG or Type B 22AWG with insulation suitable for at least 250V 1 02mm 18AWG four conductor shielded This equipment is suitable for use in the following environment e CSA Class l Div 1 Groups A B C amp D e CSA Class I Div 2 Group
37. NT_SPAN_1 Value 5 W LINEARIZER_PERCENT_SPAN_1 Value 7 5 W LINEARIZER_PERCENT_SPAN_1 Value 10 W LINEARIZER_PERCENT_SPAN_1 Value 12 5 W LINEARIZER_PERCENT_SPAN_1 Value 15 W LINEARIZER_PERCENT_SPAN_1 Value 17 5 Ww LINEARIZER_PERCENT_SPAN_1 Value 20 W LINEARIZER_PERCENT_SPAN_1 Value 22 5 W LINEARIZER_PERCENT_SPAN_1 Value 25 W LINEARIZER_PERCENT_SPAN_1 Value 27 5 W LINEARIZER_PERCENT_SPAN_1 Value 30 W LINEARIZER_PERCENT_SPAN_1 Value 32 5 Ww LINEARIZER_PERCENT_SPAN_1 Value 35 W LINEARIZER_PERCENT_SPAN_1 Value 37 5 W LINEARIZER_PERCENT_SPAN_1 Value 40 W LINEARIZER_PERCENT_SPAN_1 Value 42 5 W LINEARIZER_PERCENT_SPAN_1 Value 45 W LINEARIZER_PERCENT_SPAN_1 Value 47 5 Ww LINEARIZER_PERCENT_SPAN_1 Value 50 W LINEARIZER_PERCENT_SPAN_1 Value 52 5 W LINEARIZER_PERCENT_SPAN_1 Value 55 W LINEARIZER_PERCENT_SPAN_1 Value 57 5 W LINEARIZER_PERCENT_SPAN_1 Value 60 W LINEARIZER_PERCENT_SPAN_2 Last 16 values in the 41 point linearizer table These values represent t percent of process span for a corresponding percent of count span value he Mode In Diagnostics TB Sub parameter Description R W LINEARIZER_PERCENT_SPAN_2 Value 62 5 W LINEARIZER_PERCENT_SPAN_2 Value 65 W LINEARIZER_PERCENT_SPAN_2 Value 67 5 Ww LINEARIZER_PERCENT_SPAN_2 Value 70 W LINEARIZER_PERCENT_SPAN_2 Value 72 5 W LINEARIZER_PERCENT_SPAN_2 Value 75 W LINEARIZER_
38. OM Common O O Aux O Aux Auxiliary input frequency signal gt a Fieldbus Interconnecting terminals GEN2000 with Foundation Fieldbus Figure 8 Interconnect Table 5 Terminal names and descriptions Terminal Name Description 1 L1 AC or DC power input 2 L2 AC or DC power input 3 RY NO Relay normally open 4 RYC Relay common 5 RY NC Relay normally closed 6 Freq Not used in FB applications 7 Freq Not used in FB applications 8 6V Auxiliary input power 9 COM Auxiliary input power common 10 N A Not used 11 Aux Auxiliary input frequency signal 12 Aux Auxiliary input frequency signal 13 FB Fieldbus positive terminal 14 FB Fieldbus negative terminal Note The power input terminals are not polarity sensitive 20 LFXG D Technical Reference Manual Installation Power CAUTION DO NOT APPLY POWER until a thorough check of all the wiring is complete Special installation maintenance or operating instructions If it is necessary to open the sensor the following warning applies EXPLOSION HAZARD Do not disconnect equipment unless power has been switched off or the area is known to be non hazardous AVERTISSEMENT RISQUE D EXPLOSION AVANT DE DECONNECTER L EQUIPEMENT COUPER LE COURANT OU S ASSURER QUE L EMPLACEMENT EST DESIGNE NON DANGEREUX CAUTION Open circuits before removing cover An explosion proof seal shall be installed within 450 mm 18 of the enclosure AVERTISSEMENT Ou
39. PERCENT_SPAN_2 Value 77 5 W LINEARIZER_PERCENT_SPAN_2 Value 80 W LINEARIZER_PERCENT_SPAN_2 Value 82 5 W LINEARIZER_PERCENT_SPAN_2 Value 85 W LINEARIZER_PERCENT_SPAN_2 Value 87 5 W LINEARIZER_PERCENT_SPAN_2 Value 90 W LINEARIZER_PERCENT_SPAN_2 Value 92 5 Ww LINEARIZER_PERCENT_SPAN_2 Value 95 W LINEARIZER_PERCENT_SPAN_2 Value 97 5 W LINEARIZER_PERCENT_SPAN_2 Value 100 W LFXG D Technical Reference Manual continued on next page 125 Appendix III Parameters Table 19 Transducer block parameters continued Mode Parameter Description R W nee Reserved for a command R Using the linearizer data points number of points specified by LINEARIZER_NUM_POINTS calculate a new 41 point linearizer CALCULATE_LINEARITY_NOW curve LINEARIZER_PERCENT_SPAN values w In Diagnostics TB Choices are not calculating linearity e calculate linearity now AVERAGE_COUNTS In Process and Diagnostics TBs Averaged counts for the sensor from a data collect operation R Delete all defined linearizer data points The variable DELETE ALLDATA POINTS LINEARIZER NUM POINTS will be set to 0 Choices are W In Diagnostics TB e Idle Delete all data points STANDARDIZE_VALUE_SOURCE Displays whether Process STDZ uses lab entry of process value R In Setup TB or Default Stdz value Configure whether Process STDZ uses lab entry of process value or Default Stdz value oe in IZE_TYPE Choices
40. Reserved for density applications R ma a Flesawad R Sime Date of the last time the gauge was reset or power cycled R VESSEL _ID Inner diameter of vessel in units set in LINEAR_UNITS used for the w In Setup TB empirical linearizer calculation ee i Select either a remote or local sensor Ww eer eae Sensor serial number for this gauge Maximum length 8 R eee CPU s serial number for this gauge Maximum length 8 R ASSEMBLY_NUMBER Res ed w In Diagnostics TB continued on next page LFXG D Technical Reference Manual 123 Appendix III Parameters Table 19 Transducer block parameters continued Mode Parameter Description R W PV values for the linearizer data points up to 11 points vues Mode Sub parameter Description R W LINEARIZER_VALUE Point zero PV value Ww LINEARIZER_VALUE Point one PV value Ww oe LINEARIZER_VALUE Point two PV value W LINEARIZER_VALUE Point three PV value Ww LINEARIZER_VALUE Point four PV value Ww LINEARIZER_VALUE Point five PV value Ww LINEARIZER_VALUE Point six PV value Ww LINEARIZER_VALUE Point seven PV value Ww LINEARIZER_VALUE Point eight PV value W LINEARIZER_VALUE Point nine PV value Ww LINEARIZER_VALUE Point ten PV value Ww Count values for the linearizer data points up to 11 points he Mode Sub parameter Description R W LINEARIZER_COUNTS Point zero count value WwW LINEARIZER_COUNT
41. S Point one count value Ww LINEARIZER_COUNTS LINEARIZER_COUNTS Point two count value Ww In Diagnostics TB LINEARIZER_COUNTS Point three count value Ww LINEARIZER_COUNTS Point four count value Ww LINEARIZER_COUNTS Point five count value WwW LINEARIZER_COUNTS Point six count value Ww LINEARIZER_COUNTS Point seven count value Ww LINEARIZER_COUNTS Point eight count value WwW LINEARIZER_COUNTS Point nine count value WwW LINEARIZER_COUNTS Point ten count value Ww LINEARIZER_NUM_POINTS Specifies the number of linearizer data points currently defined for w In Diagnostics TB calculating a new linearizer curve Choices are LINEARIZER_SAVE_DATA e Idle w In Diagnostics TB e Save Current Values Reset to Saved Values Choices are LINEARIZER_STATE e Unknown State Ww In Diagnostics TB Current Values Saved e Current Values Not Saved 124 continued on next page LFXG D Technical Reference Manual Appendix Ill Parameters Table 19 Transducer block parameters continued Parameter Description Mode R W LINEARIZER_PERCENT_SPAN_1 In Diagnostics TB First 25 values in the 41 point linearizer table These values represent the percent of process span for a corresponding percent of count span value Mode Sub parameter Description R W LINEARIZER_PERCENT_SPAN_1 Value 0 W LINEARIZER_PERCENT_SPAN_1 Value 2 5 W LINEARIZER_PERCE
42. SCALE An error message displays if this is not set correctly and the Al block will not switch to AUTO mode 36 LFXG D Technical Reference Manual LFXG D setup Calibration parameters Calibration parameters include the following Data collect interval Warning delta Process standardization config Standardize interval Data collect interval Data collection interval is the time in seconds over which the system collects a process measurement Use this interval time to collect data for the following Calibration Linearizer data points Standardization Diagnostic Warning delta Warning percentage span calibration is the difference between the two calibration points cal low and high level values as a percent of level span that causes a warning to appear For a good calibration it is important for the two calibration points to be as far apart as possible The default value is 10 The user typically does not need to change this value for most applications LFXG D Technical Reference Manual 37 LFXG D setup Process standardization configuration Standardization adjusts the system by resetting one point of the calibration curve to an independently measured or known level The frequency of standardization depends on several factors including desired accuracy of the reading Set up the following sub parameters for standardization e STANDARDIZE_POINT e STANDARDIZE_TYPE Standardize point Process value recorded for the
43. STORY_GAIN standardization R Provides the calculated gain term for the STDZ_HISTORY_GAIN standardization R Provides the calculated gain term for the STDZ_HISTORY_GAIN standardization R Write a non zero value to this variable to force the gauge to average the DATA_COLLECT_EXECUTE counts for the data collect interval In Process Setup and Choices are Ww Diagnostics TBs e Data collect not active Execute data collect RESERVED_8 F _ In Diagnostics TB Reserved for density applications R RESERVED_9 O In Diagnostics TB Reserved for density applications R RESERVED_10 are In Diagnostics TB Reserved for density applications R RESERVED_11 oo In Diagnostics TB Reserved for density applications R RESERVED_12 as In Diagnostics TB Reserved for density applications R PEEK_POKE_ADDRESS In Diagnostics TB Reserven R PEEK_POKE_DATA_TYPE In Diagnostics TB RESSIVED R PEEK_POKE_RD_WR In Diagnostics TB aes j PEEK_POKE_FLOAT_VALUE In Diagnostics TB Reserved R PEEK_POKE_WORD_VALUE In Diagnostics TB Reserved R PEEK_POKE_BYTE_VALUE In Diagnostics TB Reserved R PEEK_POKE_EXECUTE In Diagnostics TB Reserven j SYSTEM_COMMAND Reserved R In Diagnostics TB FACTORY_KEY Res rv d w In Diagnostics TB LFXG D Technical Reference Manual continued on next page 133 Appendix III Parameters Table 19 Transducer block parameters continued ae Mode Parameter Description R W
44. Technical Reference Manual LFXG D FiberFlex Detector with GEN2000 Electronics for Foundation Fieldbus Applications Measuring Continuous Level Document ID 31400 Nuclear Revision history Table 1 Revision history Version Description Date 1 0 Initial release Formerly 241158 051201 1 1 Electronics revision 090306 1 2 Added certification information and IECex label 090819 1 3 Changed company name logo and website 110301 Copyright 2011 VEGA Americas Inc Cincinnati Ohio All rights reserved This document contains proprietary information of VEGA Americas Inc It shall not be reproduced in whole or in part in any form without the expressed written permission of VEGA Americas Inc The material in this document is provided for informational purposes and is subject to change without notice FiberFlex and GEN2000 are registered trademarks of the VEGA Americas Inc HART is a registered trademark of The HART Communication Foundation FOUNDATION Fieldbus is a trademark of the Fieldbus Foundation NI FBUS Configurator is a registered trademark of National Instruments ISO 9001 approval by Lloyd s Register Quality Assurance Limited to the following Quality Management System Standards ISO 9001 2000 ANSI ASQC Q9001 2000 Approval Certificate No 107563 VEGA Americas Inc 4170 Rosslyn Drive Cincinnati Ohio 45209 1599 USA Voice 513 272 0131 FAX 513 272
45. Technical Reference Manual 31 LFXG D setup Refer to Appendix IV for illustrations of the transducer blocks TB menus associated with the Fieldbus software The transducer blocks enable access to all of the parameters For ease of use VEGA has divided the parameters and user methods by function into the three transducer blocks 1 Process usually labeled TRANSDUCER 449 2 Setup usually labeled TRANSDUCER 508 3 Diagnostics usually labeled TRANSDUCER 569 There are four main setup requirements They are 1 Process Primary Value Range Calibration Parameters and Filtering 2 System Source Type and Source Functions 3 Alarm X ray Threshold 4 Auxiliary Secondary Filter Value Compensation Select and Compensation Source 32 LFXG D Technical Reference Manual LFXG D setup The following TRANSDUCER BLOCK and Al_ BLOCK parameters are the only variables that must be set up for a basic level measurement PROCESS TRANSDUCER BLOCK 449 DEVICE SELECT set to Level PRIMARY VALUE_RANGE SETUP TRANSDUCER BLOCK 508 FILTER TYPE FAST CUTOFF default is 0 DATA COLLECT INTERVAL LINEARIZER TYPE DIAGNOSTICS TRANSDUCER BLOCK 569 LINEARIZER VALUE optional only if using the table nonlinear type LINEARIZER COUNTS optional only if using the table linear type Al BLOCK XD_SCALE OUT_SCALE CHANNEL set to Primary Channel LFXG D Technical Reference Manual 33 LFXG D setup Process setup Process confi
46. Uncertain Uncertain Bad Uncertain LFXG D Technical Reference Manual Diagnostics and repair Status Use Diagnostic TB 569 to check status and historical information Diagnostic alarms and fieldbus messages Diagnostic conditions that are currently in alarm alert the user by two possible means 1 Diagnostic history parameters from the Diagnostics TB 569 parameters 2 Fieldbus messages that appear when a fieldbus device connects if the alarm is setup Note Refer to the table on page 92 for a summary of all diagnostic alarm conditions and recommended actions Status diagnostics To check the status of the system you can use the Diagnostic History parameters refer to page 95 These parameters only indicate the status historical occurrences are stored in the Min Max History parameters Some conditions are self repairing for example RAM and EEPROM corruption Therefore these may appear in the history screens but not in the diagnostic screens LFXG D Technical Reference Manual 91 Diagnostics and repair Summary of diagnostic alarm conditions Device error conditions RAM Corrupt Sensor EEPROM Corrupt Flash Corrupt Real Time Clock Fail Internal Temperature Sensor Failure Source Wipe Due CPU EEPROM Corrupt Sensor Fail Sensor High Voltage Fail Standardize Due Shutter Check Due New Hardware New CPU Found Process Out of Range X Ray Detected Command Failure 92 Table 8 Diagnostic a
47. _TEMP and MAX_SENSOR_TEMP Displays the internal temperature of the scintillator sensor in the LFXG D model level transmitter Last reset LAST_RESET Displays the date and time of the last history reset Viewing the minimum and maximum history Procedure 20 To view the minimum and maximum history 78 LFXG D Technical Reference Manual Advanced functions ip From Diagnostic TB 569 select the following e MIN_PRIMARY_COUNTS e MAX_PRIMARY_COUNTS e MIN_SECONDARY_COUNTS e MAX_SECONDARY_COUNTS e MIN_SENSOR_TEMP e MAX_SENSOR_TEMP e LAST_RESET 2 View the minimum and maximum history parameters value fields Resetting the minimum and maximum history You can reset the minimum and maximum history values so that they record from the time of the reset Procedure 21 To reset the minimum and maximum history 1 From Diagnostic TB 569 select the RESET_MIN_MAX_HISTORY The following choices are available e idle e execute 2 Select execute After selecting execute the date of the reset is recorded in the LAST_RESET parameter and the RESET_MIN_MAX_HISTORY value returns to idle LFXG D Technical Reference Manual 79 Advanced functions New hardware or EEPROM corrupt The transmitter contains two electrically erasable programmable read only memory EEPROM chips The EEPROMs store all data specific to that sensor electronics pair for the installation The locations of the EEPROMs are e Onthe CPU board e Onthe sensor board Each
48. ackup sensor main gt CPU backup e main mems gt backup mems PERFORM_SELF_TEST_NOW In Diagnostics TB ESVE R UNIFORMITY GAIN A factory set multiplier adjustment for the sensor electronics R In Diagnostics TB HIGH_VOLTAGE_MONITOR In Diagnostics TB Displays the sensor s measured high voltage R TEMP_COMP_VALUE Process chain counts after the temperature compensation gain is R In Process TB applied TEMP COMP GAIN Gain term applied to the raw sensor counts R In Process TB FIRMWARE_VERSION a sg In Diagnostics TB Revision of the gauge s firmware R HARDWARE_VERSION ck i In Diagnostics TB Revision of the gauge s hardware R HIGH_VOLTAGE_SETTING In Process TB Factory setting for the sensor high voltage R Ste RD ete Sensor counts at last standardize R In Process TB SPAN_LIMIT In Setup TB os R BASE_VALUE Process variable PV Digital value that represents the density or R In Setup TB level value in engineering units continued on next page LFXG D Technical Reference Manual 129 Appendix III Parameters Table 19 Transducer block parameters continued Mode Parameter Description R W AVERAGE_AUX_COUNTS A In Setup TB Average counts from auxiliary channel data collect R SECONDARY FILTER VALUE Filter time constant applied to the auxiliary input channel counts Ww In Setup TB STANDARDIZE_GAIN Displays current value of standardize gain Reset
49. ages 13 Links 11 location 16 loop 115 low temperature application 109 macrocyle 115 Maintenance periodic 103 Memory non volatile 115 Menus and methods capability xvi Min Max history 78 mounting requirements 18 N network address 113 network management 115 new hardware 80 New hardware advanced function 80 New hardware found in diagnostic history 94 New hardware found message responses to 80 Next wipe shutter check due 45 No device found message 99 non linear table 57 non scheduled acyclic communication 115 non volatile memor 115 0 Oos 116 P Parameter 116 Output 116 parameters 117 PC 116 percent count range 74 percent process span 74 PLC 116 power line switch 22 power requirements 21 Power requirements LFXG D Technical Reference Manual Index AC and DC 21 Power supply board 97 Primary channel 72 primary filter value 41 Primary Raw Counts 127 Primary Value 119 Primary value range 35 36 Primary Value Range 119 process alarm 93 override switch 93 Process alarm 89 Process chain 72 Process out of range in diagnostic history 94 Process Setup 34 process standardization 38 periodic 68 Process TB 449 sub menuss 135 process variable 116 Publishing schedule 13 PV process value 74 RAM corrupt in diagnostic history 94 Raw counts 73 RC 116 Real time clock fail in diagnostic history 94 Record shutter check 44 Record
50. and repair Test points Table 9 Power supply board test point labels and descriptions Power supply board Label Description 3V Voltage generated on the FDIP board 6 4V Voltage generated on the FDIP board FBRX Non lsolated FB Rx signal Factory Diagnostics FBTX Non lsolated FB Tx signal Factory Diagnostics FBGND Isolated FB ground FB FB signal same as P1 14 FB FB signal same as P1 13 5VDC Gauge generated logic supply DGND Ground for 5V logic Table 10 CPU board test point labels and descriptions Label Description Count Raw input signal coming from the preamplifier GND Logic ground U5 pin 8 5V power supply test point referenced to logic ground Jumpers The LFXG D does not use jumpers J1 J4 on the CPU board Power supply board LED indicators Table 11 Power supply board LED descriptions conditions and recommendations LED Description Normal Condition Error Condition Recommendation 24V Intermediate voltage level ON OFF Call VEGA Field Service Factory Diagnostics only Relay Relay condition indicator ON relay is None Check against relay output energized terminals 3 4 and 5 If no OFF relay is de relay output replace power energized supply board 98 LFXG D Technical Reference Manual Diagnostics and repair CPU board LED indicators Use the LED indicators on the CPU board to check the basic functioning of the level gauge They are visible when you remove
51. and the error message New Hardware Found displays then one of the EEPROMs is probably corrupt You normally can repair the corruption with the EEPROM backup CAUTION If you suspect that an EEPROM is corrupt we recommend you call VEGA Field Service for advice before performing the following procedure To repair the corruption from the EEPROM backup Procedure 23 To repair corrupted EEPROM 1 From Diagnostic TB 569 select COPY_NV_MEMORY 2 Select main mems backup mems 3 Wait 60 seconds for the transfer to complete LFXG D Technical Reference Manual 81 Advanced functions Test modes Four independent test modes are available These test modes are 1 Sensor 2 Auxiliary 3 Relay 4 Temperature In the test modes the transmitter stops measuring the process material and allows manual adjustment of critical variables for troubleshooting The test modes enable independently However you can use them in combination to test multiple variable effects All of the test modes time out automatically after one hour if you do not manually exit To use the test modes the Diagnostic TB 569 must be in Out of Service OoS mode Once the gauge is in test mode the Diagnostic TB 569 can be placed back into automatic AUTO mode CAUTION While in a test mode the transmitter is not measuring process and so its primary value does not reflect the process value Be sure to remove the system from automatic control before ente
52. andard calibration method 53 Simple calibration method 55 Choosing the linearizer type 57 Non linear table 57 Table linear 57 Checking the gauge repeatability 59 Calibrating the gauge 60 When a new calibration may be necessary 68 Periodic process standardization 68 Automatic standardization reminder 68 Performing a standardization 69 CHAPTER 6 ADVANCED FUNCTIONS 71 Process chain 72 Primary channel 72 Sensor temp 72 Sensor counts 73 Temp comp counts 73 Raw counts 73 Adjusted counts 73 Source decay counts 73 Stdz counts 73 count range 74 Process Span 74 Level 74 Final level 74 Viewing the primary channel parameter values 75 Process variables 76 Aux channel chain 78 Min Max history 78 Viewing the minimum and maximum history 78 Resetting the minimum and maximum history 79 New hardware or EEPROM corrupt 80 Proper response to New hardware found message if new hardware has been installed 80 Proper response to New hardware found message if new hardware has not been installed 81 Test modes 82 Sensor test mode 83 Auxiliary input test mode 84 Relay test mode 85 Temperature test mode 85 Other advanced functions 86 Sensor voltage 86 Firmware version 86 iv LFXG D Technical Reference Manual Preface Hardware version 86 CPU serial number 86 Sensor serial number 86 Sensor temperature coefficients 86 Sensor location 86 Select gauge type 88 CHAPTER 7 DIAGNOSTICS AND REPAIR 89 Software diagnostics 89 Diagnostic alarm
53. arm conditions 92 diagnostic history 94 Diagnostic history 91 Diagnostic History Alarms 95 Diagnostic TB 569 sub menus 137 Diagnostics History Newest 131 Diagnostics hardware 96 distributed control 113 DO 113 DRAM 113 Dynamic link library 113 E EMI 113 event 113 139 Index F fast cutoff 41 FBAP 113 FF 114 Field service See VEGA Customer Service fieldbus 113 Fieldbus configuration 27 filter type 40 filtering 40 of auxiliary input 47 RC 40 rectangular window 41 FIP 113 Firmware version 86 FLASH corrupt in diagnostic history 94 FLASH corrupt LED pattern 99 FOUNDATION fieldbus 114 Foundation Fieldbus system xvi Function block 114 G gain 62 gauge commissioning 23 gauge status 91 ground screw 19 H Hardware version 86 History information 94 VO 114 Identifying blocks 13 IEC 114 Interconnect 20 ISO 114 J Jumpers CPU 98 L LAS 115 LEDs 99 Level instead of density is indicated See Select gauge type LFXG D scintillator 10 LFXG D setup 31 linear table 57 Linear Units 123 linearizer linear table 57 non linear table 57 Linearizer 140 choosing 57 Linearizer Counts 124 Linearizer Number points 124 linearizer point data collect 63 Linearizer Type 123 Linearizer Value 124 Link 115 link active schedule 115 link identifier 115 link master device 115 link object 115 linkage 115 Link
54. ary Input 1 Internal 2 External Note You must also set up the AO_BLOCK if the compensation frequency input is coming from an external source The following AO block parameters must be setup as follows CHANNEL Compensation value PV_SCALE UNITS_INDEX Counts per second XD_SCALE UNITS_INDEX Counts per second MODE_BLOCK Cascade 3 a 3 b Procedure 8 To set the compensation source and AO_BLOCK parameters From Process TB 449 select COMPENSATION_SOURCE Click on the Value field and select either of the following e Undefined e None e Internal e External If it is an external source perform steps 3 a through 3 e Select the AO BLOCK From the AO_BLOCK parameters click CHANNEL and select Compensation value from the list Click PV_SCALE and the sub parameter UNITS_INDEX and select counts per second Click XD_SCALE and the sub parameter UNITS_INDEX and select counts per second Click MODE_BLOCK parameter and select Cascade LFXG D Technical Reference Manual 49 LFXG D setup Note 50 LFXG D Technical Reference Manual Chapter 5 Calibration Calibration establishes a reference point or points that relate the detector output to actual or known values of the process You must perform a calibration before the gauge can make accurate measurements Perform the calibration after the installation and commission of the gauge at the field site You do not need to repeat the calibration procedures if certain c
55. ation This quantity shows where the current measurement is in relation to the total count range count range 100 x C Cs CL Cy where Cs STDZ_COUNTS CL Cu counts at Cal low level and Cal high level C L CH counts range Process Span PERCENT_SPAN Displays the measurement value as a percent of the measurement span The maximum and minimum level values are input in the Setup parameters A graph of percent count range vs percent process span indicates the non linearity of the radiation transmission measurement If using a table linearizer the values in the table are percent count range and percent process span counts range 50 F I I I 30 process span Figure 18 counts range vs process span Level UNFILTERED_VALUE Displays the level in inches without the time constant or rectangular window filter Final level PRIMARY_VALUE Displays the process value that is the level or other indication in engineering units after applying the filter 74 LFXG D Technical Reference Manual Advanced functions Viewing the primary channel parameter values Procedure 17 To view primary channel values ik From Process TB 449 select the following parameters e TEMPERATURE_VALUE PRIMARY_RAW_COUNTS TEMP_COMP_VALUE UNIFORMITY_GAIN_COUNTS SUMMATION_COUNTS SOURCE_DECAY_COUNTS STANDARD_COUNTS COUNT_RANGE_PERCENT PERCENT_SPAN UNFILTERED _VALUE PRIMARY_VALUE 2 The values for each parameter
56. ature to enter the number of days between successive shutter check diagnostic alarms Check with current applicable regulations for recommendations on shutter check intervals Record shutter check now Use the Record shutter check now feature to reset the diagnostic alarm shutter check due For more information see the Diagnostics and Repair chapter 44 LFXGD Technical Reference Manual LFXG D setup Days till wipe Use the days till wipe feature to view the number of days until the next source wipe alarm For more information see the Diagnostics and Repair chapter Days till shutter check Use the days until shutter check feature to view the number of days until the shutter check alarm For more information see the Diagnostics and Repair chapter 1 a 1 b 2 b Procedure 5 To set the source function parameters Set up wipe interval From Setup TB 508 click WIPE_INTERVAL Type the interval in days between successive Source Wipe Due messages Set according to license source and applicable regulations Set up shutter check interval From Setup TB 508 click SHUTTER_CHECK_INTERVAL Type the interval in days between successive Shutter Check Due messages Set the interval according to license source holder model and applicable regulations LFXG D Technical Reference Manual 45 LFXG D setup Alarm setup Alarm configuration enables the setup of the x ray threshold The x ray alarm feature ca
57. block parameters These functions are primarily for use by VEGA personnel for advanced troubleshooting and repair This chapter gives a basic explanation of these functions Note VEGA strongly recommends that you ask our advice before using any of these advanced functions Advanced functions includes the following features e Process chain e Primary channel e Process variables e Aux channel e Min Max history e Primary counts e Secondary counts e Sensor temperature e New hardware e New CPU e No new hardware e Test mode e Sensor test e Auxiliary input test e Relay test mode e Temperature test mode LFXG D Technical Reference Manual 71 Advanced functions Other advanced functions High voltage monitor Firmware version Hardware version CPU serial number Sensor serial number Sensor temperature coefficients Sensor location Process chain The process chain is a description of the transmitter software s calculation of a level measurement from a radiation reading Use the Process TB 449 Advanced Functions Process chain submenu or the specific transducer block parameters to view intermediate values of the calculation to verify proper functionality of the software Primary channel Use the Advanced Functions Process chain Primary channel or the transducer block parameters to view the following parameters Sensor temp Sensor counts Temp comp counts Raw counts Adjusted counts Source decay STDZ counts cou
58. bracket mounting 18 LFXG D Technical Reference Manual Installation Wiring the equipment Note If you have received an interconnect drawing from VEGA or the engineering contractor and the instructions differ from the instructions in this manual use the drawing It may contain special instructions specific to your order Use the drawing notes and the steps that follow to make the input and output connections Make the connections at the removable terminal strips mounted on the power board To access the power board remove the explosion proof housing cap VEGA provides an internal and external ground screw to connect the power Earth ground wire Remove the top cover the internal ground screw is located at the front of the housing The external ground screw is located next to the conduit entry Note Not all connections are required for operation Power Supply Board Terminal Block e j a RS 485 Ground if applicable CPU Board nternal Housing Pi N f Ground Screw F n LON gt BAN SN A ee H Way il iy Wry M WS z n l 7 NS j Figure 7 LFXG D internal and external ground screw LFXG D Technical Reference Manual 19 Installation 10 Power in AC or DC power input 20 Power in 3 0 Relay NO Relay 40 Relay C normally open common 3 Relay NG normally closed 70 Freq gt Not used in HART or Fieldbus 8 0 6V Auxiliary input power 90O C
59. cation contact VEGA for recommendations e Process requires a new measurement span e Entry of anew measurement span setting into the software e Installation of a new radiation source holder e Moving the level transmitter to another location in U S only specifically licensed persons may relocate the gauge e Changes to the process vessel for example lining insulation or agitator e Excessive build up or erosion of vessel that standardization cannot compensate for check standardize gain e Standardize gain is greater than 1 2 after a standardization indicating it made a 20 adjustment from the calibration Periodic process standardization Standardization adjusts the system by resetting one point of the calibration curve to an independently measured or known level The frequency of standardization depends on several factors including desired accuracy of the reading During the standardization procedure the system displays either e A default value for the standardization condition e A prompt to enter the actual level of the standardization condition Chapter 4 LFXG D Setup details how to set up the software for either prompt Automatic standardization reminder If you enable the standardization due alarm the level transmitter alarms when standardization is due The standardize interval is programmed into the calibration parameters setup Refer to Chapter 4 LFXG D setup for details on the following subjects e Output rela
60. cessary to open the sensor the following warning applies EXPLOSION HAZARD Do not disconnect equipment unless power has been switched off or the area is known to be non hazardous AVERTISSEMENT RISQUE D EXPLOSION AVANT DE DECONNECTER L EQUIPEMENT COUPER LE COURANT OU S ASSURER QUE L EMPLACEMENT EST DESIGNE NON DANGEREUX CAUTION Open circuits before removing cover An explosion proof seal shall be installed within 450 mm 18 of the enclosure AVERTISSEMENT Ouvrir les circuits avant d enlever le couvercle Un scellement doit tre install moins de 450 mm du bo tier CAUTION Allow a minimum of 10 minutes before opening the GEN2000 for internal inspection This allows time for the gauge to de energize cool and fully discharge the capacitor Two circuit boards in the LFXG D are field replaceable Figure 19 and Figure 20 identify these two circuit boards Power Supply Board Terminal Block lt z eee y RS 485 Ground if applicable CPU Board nternal Housing Ground Screw XS VAL 1l Ai a 1 f W K 1 x j al L Aig A i m gt Mounting Bracket F 4 Figure 19 Circuit board identifications 96 LFXG D Technical Reference Manual Diagnostics and repair Figure 20 Power supply board simplified component layout Note Jumper positions for JP1 JP2 and JP3 are set to NORM LFXG D Technical Reference Manual 97 Diagnostics
61. communication configuration information and control of the process Step 4 Formulate a control strategy 28 LFXG D Technical Reference Manual Fieldbus configuration You must configure the following to define your control strategy e Identify the function blocks e Connect the relevant function blocks e Configure loop or cycle times Refer to your specific host software manual for information on how to define your control strategy Step 5 Schedule function blocks and communication Fieldbus schedules the execution of function blocks and the communication between the connected function blocks The two schedules synchronize to prevent over sampling Function blocks contain an algorithm and several parameters to control a process Refer to your specific host software manual for information on how to schedule your function blocks Step 6 Configure alarms To configure alarms identify the function blocks that generate alarms and the hosts that receive the alarms You must also configure the alarm limits and priorities You can configure a device such as a PC to receive alarms that the function blocks generate Refer to your specific host software manual for information on how to configure the alarms LFXG D Technical Reference Manual 29 Fieldbus configuration Step 7 Set static parameters For your control strategy to work you must configure static parameters such as scaling parameters like XD_SCALE in Al AO blocks Refer to
62. depending on power requirements There are three types of devices on a field bus network e Link master e Basic devices e Bridges LFXG D Technical Reference Manual 11 Introduction Link master The link master device controls communications traffic on a link It prevents multiple devices from communicating data at the same time It can be a distributed control system DCS or any other device such as a valve or pressure transducer There can be more than one link master per link but only one link master can be the Link Active Scheduler LAS at any given time Basic device A basic device cannot become the LAS The LFXG D is a basic device Bridge A bridge connects two or more links Device identification You can identify devices by character string names or tags The device tag is configurable attribute of the device that usually describes the type of device Device tags are unique to each device on a fieldbus network Another unique identifier is the device ID This ID includes a serial number that is unique to the device This identifier is assigned by the device manufacturer and cannot be changed Blocks and parameters The level gauge has a set of functions that it can perform These functions are designated as function blocks within the device The function blocks supported by the LFXG D are e One resource block e Three transducer blocks TB e Two analog inputs Al e One analog output AO 12 LFXG D Technica
63. e traditional Resistance Capacitance filtering It provides an infinite impulse in which all of the previous samples contribute less and less to the average but all contribute somewhat The most recent samples are weighted most heavily in computing the average Compared to digital filtering RC exponential filtering provides a quicker response to step changes in the process but has a larger noise band Sample Weighting Time T 1 time constant Figure 10 RC exponential filtering 40 LFXG D Technical Reference Manual LFXG D setup Digital filtering Digital filtering computes an average based only on a specified finite number of samples All samples are weighted equally in the average Although it provides a slower step response since the most recent measurements are weighted the same as those further back in time it produces a less noisy signal Generally digital averaging by itself produces results similar to combining RC exponential filtering with the fast cutoff feature Sample Weighting Sample Current Sample Figure 11 Digital filtering Primary filter value The primary filter value is the filter time constant applied to the final PV output The type of filter you choose determines the primary filter value With the RC exponential method the primary filter value entry is equivalent to a time constant that is the amount of time in seconds that it takes for the gauge reading to achieve 63 2 of a step cha
64. een blocks used to perform a control algorithm Central processing unit Distributed control system Device description A machine readable description of all the blocks and block parameters of a device An identifier for a device that the manufacturer assigns Device IDs must be unique to the device no two devices can have the same device ID continued on next page LFXG D Technical Reference Manual Appendix II Glossary Table 18 Terms and meanings continued Term Meaning Device tag A name you assign to a fieldbus device DI Discrete input Distributed control DO DRAM Driver Dynamic link library EMI Ethernet Event F FBAP Fieldbus Fieldbus Foundation Fieldbus network address FIP Process control distributed among several devices connected by a network Discrete output Dynamic random access memory Device driver software installed within the operation system A library of functions and subroutines that links to an application at run time Electromagnetic interference A recognized standard local area network that uses coaxial cable An occurrence on a device that causes a fieldbus entity to send the fieldbus event message Fahrenheit A fieldbus application that you create using FOUNDATION Fieldbus function blocks An all digital two way communication system that connects control systems to instrumentation The organization that developed a fieldbus network specifically based upon t
65. el transmitter can automatically remind users when a source wipe and shutter check are due using the diagnostic alarms If you use this feature you must record the source wipes and shutter checks in the software to acknowledge the alarm and to reset the timer Perform the following procedure after a source wipe or a shutter check Refer to the Radiation Safety Manual and CD that came with your source holder O V part numbers 239291 and 244316 Always refer to the safety instructions in this guide and the country specific installation standards Follow the prevailing safety regulations and accident prevention rules of your company and country LFXG D Technical Reference Manual 103 Diagnostics and repair Recording a source wipe Procedure 35 To record a source wipe 1 From Diagnostics TB 569 select RECORD_WIPE_NOW 2 Click the value field The following selection displays e idle e execute Si Select execute Recording a shutter check Procedure 36 To record a shutter check ls From Diagnostics TB 569 select RECORD_SHUTTER_CHECK_NOW 2 Click the value field The following selection displays e idle e execute 3 Select execute Viewing the due date for source wipes and shutter checks Procedure 37 To view due date of source wipe From Diagnostics TB 569 select DAYS _TILL_WIPE The parameter values displays when the next source wipe or leak test is due Procedure 38 To view due date of shutter check From Diagnos
66. ence Manual 23 Installation Install Relocate Repair Test Unlock You can remove the source lock if installation of the gauge is in the U S and you have the specific license to remove the source holder lock Confirm that your license specifically states that you have the permission to perform this operation and then contact VEGA Field Service Radiation Safety for the combination Do not remove the lock if the gauge has a general license tag installation is in the U S and you do not have the specific license that gives you permission to remove the lock You can verify whether the gauge is a general license gauge by checking the source holder for the general license tag If it is not there it is not a general license device If you do not have permission to remove the source holder lock an VEGA Field Service Engineer or another person with this specific license must remove it for you 24 LFXG D Technical Reference Manual Installation Field service commissioning call checklist In many U S installations an VEGA Field Service Engineer commissions the gauge To reduce service time and costs use this checklist to ensure the gauge is ready for commission before the Field Service Engineer arrives Mount the source holder and detector per the certified drawings provided by VEGA Allow access for future maintenance w Make all wiring connections per the certified drawings and the Wiring the Equipment section
67. er Sensor serial number SENSOR_SERIAL_NUMBER Displays the sensor serial number Sensor temperature coefficients SENSOR_TEMP_COEFFO0 SENSOR_TEMP_COEFF1 SENSOR_TEMP_COEFF2 SENSOR_TEMP_COEFF 3 The algorithm that compensates for variations in measurement output with changes in temperature uses temperature coefficients The VEGA factory determines the coefficients through rigorous testing You cannot change these values through normal operation Sensor location SENSOR_LOCATION The local gauge refers to a gauge that has its sensor electronics and processing electronics all contained in the same housing Set a gauge to remote if the sensor electronics and processing electronics are in separate housings and the process signal connects to the auxiliary input of the processing electronics 86 LFXG D Technical Reference Manual Advanced functions i From Diagnostic TB 569 select one of the following parameters Procedure 32 To view other advanced functions HIGH_VOLTAGE_MONITOR FIRMWARE_VERSION HARDWARE_VERSION CPU_SERIAL_NUMBER SENSOR_SERIAL_NUMBER 2 From Setup TB 508 select one of the following parameters SENSOR_TEMP_COEFFO SENSOR_TEMP_COEFF1 SENSOR_TEMP_COEFF2 SENSOR_TEMP_COEFF3 SENSOR_LOCATION 3 View the parameter value field LFXG D Technical Reference Manual 87 Advanced functions Select gauge type VEGA s nuclear density gauges use much of the same hardware and software as the VEGA Level transmitters
68. ess variables ile From Process TB 449 select one of the following parameters e COUNTS_LOW COUNTS_HIGH CAL_POINT_HI CAL_POINT_LO TEMP_COMP_GAIN UNIFORMITY_GAIN SOURCE_DECAY_GAIN STANDARDIZE_GAIN HIGH_VOLTAGE_SETTING 2 From Diagnostics TB 569 select UNIFORMITY_GAIN 3 View the process variable parameter value fields LFXG D Technical Reference Manual 77 Advanced functions Aux channel chain The display values for the auxiliary channel chain parameters are Aux counts SECONDARY_RAW_COUNTS Displays the frequency input counts from optional auxiliary input Aux filtered counts SECONDARY_COUNTS Displays the filtered auxiliary counts The filter dampening value is the number to enter for the auxiliary input filter time constant Procedure 19 To view the auxiliary channel chain parameters ills From Process TB 449 select SECONDARY_RAW_COUNTS 2 From Diagnostic TB 569 select SECONDARY_COUNTS 3 View the auxiliary channel chain parameters value fields Min Max history The min max history displays the minimum and maximum value for parameters since the last min max reset The display values are e Primary counts e Secondary counts e Sensor temperature e Last reset Primary counts MIN_PRIMARY_COUNTS and MAX_PRIMARY_COUNTS Displays raw uncompensated counts from the detector Secondary counts MIN_SECONDARY_COUNTS and MAX_SECONDARY_COUNTS Displays auxiliary input if used counts Sensor temp MIN_SENSOR
69. etails on using multiple detectors are available from VEGA Americas Inc The accuracy of quality control systems that use VEGA nuclear level gauges is profitable to a wide range of industry operations A number of applications that use a level gauge are Pulp and Paper e Liquors e Bleach plant chemicals e Coating chemical storage e Lime mud e Wastewater treatment tanks Chemical e Low pressure low vapor chemical storage e Settlers e Surge tanks Food and beverage e Food slurries e Pastes e Syrups e Dough level e Intermediate batch storage Water and wastewater e Settling aeration tanks e Clarifiers e Sludge holding tanks e Wet wells 6 LFXG D Technical Reference Manual Introduction Where to find help If you need help finding information check the Index and Table of Contents within this manual In addition the fieldbus software has HELP screens These help screens are useful references for definitions of parameters and hints VEGA Customer Service VEGA Customer Service has Field Service Engineers located across the U S for on site service to U S and Canada In many cases a Field Service Engineer is at your plant for the start up of your gauge In addition Field Service Engineers regularly assist customers over the phone If you have a question or need help call Customer Service during office hours If your problem is an emergency for example a line shut down because of VEGA equipment you ca
70. fore compensation is applied Use this function to track source wipes or leak tests System will remind you when next source wipe is due if diagnostic alarms are RECORD_WIPE_NOW set w In Diagnostics TB Choices are idle e execute Use this function to track shutter checks System will remind you RECORD_SHUTTER_CHK_NOW A the hes shutter check is due if the diagnostic alarms are set T In Diagnostics TB pee e not recording shutter check e execute Displays when a source wipe or leak test is due Refer to the manual DAYS_TILL_WIPE license and local regulations Alternatively call VEGA at 513 272 R In Diagnostics TB 0131 Displays when a source holder shutter check is due to confirm the a A source holder shutter functioning The source holder shutter is used R 9 to shield the radiation beam TIME_REMAINING In Process Setup and Diagnostics Time remaining for data collect in seconds R TBs UNIFORMITY_GAIN_COUNTS Process chain counts after the UNIFORMITY_GAIN has been R In Process TB applied WIPE_INTERVAL Interval in days between successive Source Wipe Due messages w In Setup TB Set according to license source and applicable regulations Interval in days between successive Shutter Check Due messages W A Set interval according to license source holder model and P application regulations SECONDARY_COUNTS fc g In Diagnostics TB Auxiliary input counts W SECONDARY_LO_CAL_COUNTS Not us d w In Diagnostics TB SECONDARY_HI_CAL_COUNTS Not
71. gh level Perform the following procedure if you are using the Process TB 449 parameters Procedure 12 To set the cal high level 1 Complete the data collect procedure for the high level 2 In Process TB 449 select CAL_POINT_HI_COUNTS and type the AVERAGE_COUNTS value Gh Select CAL_POINT_HI and type the process setting 62 LFXG D Technical Reference Manual Calibration Step 3 Collecting linearizer table data Note The simple method of calibration does not use this step The linearizer features are available from the Diagnostics TB 569 parameters or the Diagnostics TB 569 main menu CALIBRATION LINEARIZER menu if using a menus interface This step allows you to collect data points between the high and the low calibration points so that the VEGA level transmitter calculates a response curve based on your data Before collecting the linearizer table data x Prepare to set the level and take data Eleven levels including the Cal low and Cal high levels are the maximum x Prepare to enter the levels into the transmitter x You can collect linearizer table data along with the data collection for the Cal low and Cal high levels LFXG D Technical Reference Manual 63 Calibration Collecting linearizer table data 10 11 12 13 14 64 Procedure 13 To collect linearizer table data In Setup TB 508 select LINEARIZER_TYPE Select table nonlinear In Diagnostics TB 569 view LINEARIZER_COUNTS and
72. guration From Setup TB 508 click STANDARDIZE_TYPE Select one of the following e Use Lab sample value e Use Default value Set up the Standardize Point parameter From Setup TB 508 click STANDARDIZE_POINT Type the process value recorded for the last standardization Set up the Standardize interval parameter From Setup TB 508 click STANDARDIZE_INTERVAL Type the number of days desired between each standardize LFXG D Technical Reference Manual 39 LFXG D setup Filtering This feature enables change to the response time of the system by increasing or decreasing the averaging time that is used to filter the noise in the signal An increased time for averaging enables the accumulation of a greater number of readings and therefore produces a greater statistical accuracy However this is at the expense of response time to changes in the process Filtering parameters include e Filter type e Primary filter value e Fast cutoff Filter type RC exponential or digital The level transmitter offers a choice of signal filters RC exponential or rectangular window digital The level transmitter has a sample rate of about 1sample second but process variables generally change measurably on the order of minutes Electrical and source noise occur on the order of seconds so they can be filtered out with a low pass filter leaving only the change in the process variable in the signal RC exponential RC exponential filtering simulates th
73. guration requires the set up of the following parameters e Primary value range e Calibration parameters e Filtering You can setup the process configuration directly in the various transducer block parameters If you have a menus interface you can access some of these parameters from the transducer blocks submenus 34 LFXG D Technical Reference Manual LFXG D setup Primary value range Process value range is the lowest and highest level EU_0 and EU_ 100 level measurement with the gauge The level transmitter calibrates within these settings These define the endpoints for the calibration and linearizer curve Note The minimum and maximum level values for the process value range are essential to proper calibration of the system You must enter the minimum and maximum level for process value range before you perform a calibration You must perform a new calibration procedure if there is a change in the process range minimum or maximum levels values Modify the process value range setting if the level transmitter moves from its intended location or is measuring on a different range It is a good practice to verify that the setting is correct before performing a calibration The primary value is set in the PRIMARY_VALUE_RANGE sub parameters You must set up the following sub parameters for the primary value e EU at 100 The value that represents the upper end of range maximum level of the process level sub parameter EU_100
74. hapter 1 Introduction Nuclear materials notice This equipment contains radioactive source material that emits gamma radiation Gamma radiation is a form of high energy electromagnetic radiation Only persons with a specific license from the U S NRC or other regulating body may perform the following to the source holder Dismantle Install Maintain Relocate Repair Test VEGA Field Service engineers have the specific license to install and commission nuclear gauges and can instruct you in the safe operation of your density gauge To contact VEGA Field Service call 513 272 0131 Users outside the U S and Canada may contact their local representative for parts and service LFXG D Technical Reference Manual Note See the Radiation Safety for U S General and Specific Licensees Canadian and International Users manual and the Radiation Safety Manual Addendum of Reference Information CD that came with the source holder and the appropriate current regulations for details Introduction Unpacking the equipment CAUTION You must be familiar with radiation safety practices in accordance with your U S Agreement State U S NRC or other nuclear regulatory body before unpacking the equipment x Unpack the unit in a clean dry area x Inspect the shipment for completeness by checking against the packing slip w Inspect the shipment for damage during shipment or storage Ifthe detector is incl
75. he equipment 19 Power 21 Switch for CE compliance 22 Fieldbus signal cable 22 Communication 22 Conduit 23 Commissioning the gauge 23 Can you remove the source holder lock 23 Field service commissioning call checklist 25 CHAPTER 3 FIELDBUS CONFIGURATION 27 Step 1 Connecting the devices 28 Step 2 Import the device descriptions 28 Step 3 Set address and tags 28 Step 4 Formulate a control strategy 28 Step 5 Schedule function blocks and communication 29 Step 6 Configure alarms 29 Step 7 Set static parameters 30 Step 8 Configure input output 30 Step 9 Set network parameters 30 CHAPTER 4 LFXG D SETUP 31 Process setup 34 Primary value range 35 Setting process value 36 Calibration parameters 37 Data collect interval 37 Warning delta 37 Process standardization configuration 38 Standardize default value 38 Standardize interval 38 Filtering 40 Filter type RC exponential or digital 40 Primary filter value 41 Fast cutoff 41 System setup 43 System parameters 43 Source type 43 Source functions 44 Alarm setup 46 LFXG D Technical Reference Manual iii Preface X ray alarm setup 46 Auxiliary input setup 47 Secondary filter value 47 Compensation type selection 47 Compensation source 48 Setting the auxiliary input filter and compensation type 48 Setting the compensation source 49 CHAPTER 5 CALIBRATION 51 Choosing the calibration method 51 Theory of calibration 52 Both calibration methods 52 St
76. he fieldbus segment One terminator should be at the control room junction box and the other terminator should be at the farthest field junction box e Verify that the shield is continuous over the entire length of the cable is tied to the earth ground at only one point e Check the voltage across power supply connector P1 terminals 13 and 14 at each gauge To meet Fieldbus specifications the voltage must be between 9 and 32 volts at each gauge on the segment e f a Relcom FBT 3 Fieldbus monitor is available connect it to the Fieldbus segment at the gauge It detects Fieldbus activity and reports the number of Fieldbus units seen on the segment e If the FBT 3 monitor is unable to detect Fieldbus communication activity there is a wiring problem within the Fieldbus segment Use the FBT 3 monitor to work backwards through the wiring towards the control room until Fieldbus activity is detected Correct the wiring in that area LFXG D Technical Reference Manual 101 Diagnostics and repair e lf the host DCS system is able to detect the Fieldbus gauge but is unable to get measurement data from the gauge check the HART LED on the gauge CPU board The HART LED normally is in the OFF state It flashes briefly when the Fieldbus interface board FDIP tries to communicate with the gauge CPU If this LED does not flash replace the CPU board Summary of fieldbus troubleshooting Problems Block is not going into automode stays in OOS
77. he work and principles of the ISA IEC standards committees Location of a board or device on the fieldbus the fieldbus node address Factory Instrumentation Protocol continued on next page LFXG D Technical Reference Manual 113 Appendix II Glossary Table 18 Terms and meanings continued Term Meaning FOUNDATION Fieldbus The communications network specification created by the FF Function block Function block application IEC in Input parameter 0 IRQ ISO LAN 114 Fieldbus Foundation FOUNDATION Fieldbus A named block consisting of one or more input output and contained parameters The block performs some control function as its algorithm Function blocks are the core components you control a system with The Fieldbus Foundation defines standard sets of function blocks There are ten function blocks for the most basic control and I O functions A fieldbus application that you create using FOUNDATION fieldbus function blocks International Electrotechnical Commission A technical standards committee that is at the same level as the ISO Inches A block parameter that received data from another block Input output Interrupt request International Organization for Standardization A technical standards organization that creates international technical standards for computers and communications The ISO is composed of national standards organizations in 89 countries The American National
78. ied COUNTS_HIGH Compensated sensor counts at high calibration point Source and stdz R In Process TB gain applied COUNTS RANGE Difference in low and high counts R In Process TB continued on next page LFXG D Technical Reference Manual 127 Appendix III Parameters Table 19 Transducer block parameters continued Mode Parameter Description R W SOURCE_DECAY_COUNTS Process chain counts after the SOURCE_DECAY_GAIN is applied to R In Process TB the sensor counts COUNT_RANGE_PERCENT Raw counts as a percent of count range between COUNTS _ LOW R In Process TB and COUNTS_ HIGH Current value of source decay gain System resets to 1 0 at oo standardize or calibration Increases exponentially each day value is R calculated on the midnight roll over COMPENSATION COUNTS Process chain counts after STDZ gain has been applied R In Process TB Process chain counts after auxiliary input counts have been added to aa e the sensor counts This only happens if COMPENSATION_SELECT R is set to Summation UNFILTERED_VALUE Process variable PV Digital value that represents the level value R In Process TB in engineering units PROCESS_TEMP Temperature of the process material This is only used for R In Process TB temperature compensated density measurements UNCOMPENSATED_VALUE Process variable PV Digital value that represents the level value R In Process TB be
79. in diagnostic history 94 Alert functions 111 applications 6 Aux filtered counts 78 Aux raw counts 78 auxiliary input 47 Auxiliary input test mode 84 B Basic device 12 BG 112 Bias device 112 Block 112 Block Alarm 118 block tag 112 block view 112 Blocks and parameters 12 bridge 112 Bridge 12 C Cal high level setup 62 cal low level setup 61 Calculating the linearizer 66 calibration 60 simple method of 56 Calibration 137 new 68 Commissioning checklist for field service 25 commissioning requirements 23 communication requirements 22 communication stack 112 Compensation source 48 Compensation source set up 49 Compensation Value 120 LFXG D Technical Reference Manual conduit requirements 23 Control loop 112 Copy NV Memory 129 count and level record 60 Counts high 76 Counts low 76 CPU 112 CPU board replacing 105 CPU board LED Summary 100 CPU EEPROM corrupt in diagnostic history 94 CPU serial number 86 Customer Order C O Number 7 required for repairs 107 D Data collect 59 data collect interval 37 Data collection interval using data collect on sample to check interval 59 Days till shutter check 45 DCS 112 DD 13 112 Default standardize level 38 Device Physical 116 tag 116 Device description xvi Device description files 13 Device ID 112 Device identification 12 Devices 11 DI 113 Diagnostic alarm 89 Diagnostic al
80. in this manual Tie in the wiring from the field transmitter to the DCS PLC fieldbus recorder Ensure that the AC power to the transmitter is a regulated transient free power source UPS type power is the best x If using DC power verify that the ripple is less than 100mV w Have process ready for calibration When possible it is best to be able to completely fill and empty the vessel at the high and low levels for the calibration procedure and when possible at 10 increments in between for the linearization procedure x Do not remove the lock on the source holder Notify VEGA Field Service if there is damage to the lock or it is missing LFXG D Technical Reference Manual 25 Installation Notes 26 LFXG D Technical Reference Manual Chapter 3 Fieldbus configuration Manufacturer number unit serial and VEGA specific info Resource block Sensor VEGA gauge has 3 transducer blocks for specific data manipulation Transducer blocks Process Setup and Diagnostics Function block Software Analog input output TwoAl One AO Network cable Figure 9 Fieldbus software system overview In order to use the level gauge you must install VEGA s Foundation fieldbus level DD on the fieldbus host system Instructions for configuration of the software and interfaces are included in the fieldbus manuals that come with your fieldbus hardware and software LFXG
81. ince the last R In Diagnostics TB reset MAX_PRIMARY_COUNTS In Diagnostics TB Displays the maximum sensor counts recorded since the last reset R MAX_SENSOR_TEMP In Diagnostics TB Displays the maximum sensor counts recorded since the last reset R MIN_SECONDARY_COUNTS Displays the minimum auxiliary input channel counts recorded since the last R In Diagnostics TB reset MIN_PRIMARY_COUNTS B i In Diagnostics TB Displays the minimum sensor counts since the last reset R MIN_SENSOR_TEMP sa In Diagnostics TB Displays the minimum unit temperature recorded since the last reset R Sets the min max history values back to defaults so that new min max history values can be recorded The date of the reset is logged to the RESET_MIN_MAX_HISTORY LAST_RESET variable w In Diagnostics TB Choices are e idle e execute Displays the counts recorded for each standardization ae Mode Sub parameter Description R W Displays the counts recorded for the STDZ_HISTORY_COUNTS Standardization R STDZ_HISTORY_COUNTS STDZ HISTORY COUNTS Displays the counts recorded for the R In Diagnostics TB Fa standardization Displays the counts recorded for the STDZ_HISTORY_COUNTS standardization R Displays the counts recorded for the STDZ_HISTORY_COUNTS standardization R Displays the counts recorded for the STDZ_HISTORY_COUNTS standardization R Provides the date for each standardization occurrence rr Mode Sub parameter Description R W STDZ_HISTORY_DATE STDZ_H
82. l Reference Manual Introduction The classification of functions block parameters are e Input parameters that receive data from another block e Output parameters that send data to another block e Contained parameters that do not receive or send data but are kept within the block Function blocks can also classify as alarms trends or tuning parameters These classifications are independent of input output and contained classifications For example an input parameter can also be an alarm trend or tuning parameter Device description files VEGA supplies device description DD files for the LFXG D The DD files configure the level gauge Examples of information in the DD files are e Names e Help strings e Menus and methods Identifying blocks Blocks have unique identifiers similar to the device tag The block tag describes the purpose and location of the block You can change block tags but each block must have a unique identifier Linkages A linkage is a logical connection that connects two function blocks The linkage enables data to send from one function block to another For example a linkage enables the output parameter parameter that writes to the bus to the input parameter block that receives the data The linkage can connect blocks in the same or different devices LFXG D Technical Reference Manual 13 Chapter 2 Installation Testing on the bench To ensure a quick start up after installation you can
83. l buildup See the Calibration chapter for information on standardization Avoid source cross talk When multiple adjacent pipes or vessels have nuclear gauges you must consider the orientation of the source beams so each gauge senses radiation only from its appropriate source The best orientation in this case is for the source holders to be on the inside with radiation beams pointing away from each other LFXG D Technical Reference Manual 17 Installation Mounting the measuring assembly Mounting Options Bracket Mount The L bracket supports the electronics housing For this type of mounting the conduit clamps should be spaced every 18 45cm Conduit Mount This type of mount consists of an adapter with a 2 conduit coupler part number 240721 It provides an air hose fitting for applications that must cool the gauge The pole mount requires a nipple and union Note The detector active area where it is possible to make a level measurement is between 1 25 mm from the bottom of the GEN2000 housing to the end of the flexible conduit Mount the detector so that this area spans the measurement length Note In some cases the handle on the source holder operates a rotating shutter When installing or removing the assembly from the pipe you must turn the handle to the closed OFF position and lock the handle with the combination lock provided Bracket mounting Conduit mounting Figure 6 Conduit and
84. larm conditions Diagnostic description RAM memory corruption occurred and resolved internally Repeated triggering of alarm suggests hardware problem A critical memory corruption occurred on the sensor pre amp board EEPROM that may not be resolved internally Checksum error detected in the Flash ROM memory The clock stopped This can cause a miscalculation of timed events The sensor temperature probe may not be functioning which results in erroneous measurements According to your initial setup it is time to perform a source wipe A critical memory corruption occurred on the CPU board EEPROM that may not be resolved internally If the alarm recurs there is a hardware problem Less than 1 count seen in the last 10 seconds configurable by Field Service Indicates the sensor is malfunctioning Sensor high voltage fail High voltage on the PMT is outside the usable range According to your initial setup it is time to perform standardization According to your initial setup it is time to perform a shutter check The CPU board detects a configuration mismatch The CPU board or sensor assembly may have been replaced or one of the EEPROM configurations is incorrect The current process value is not within the limits set by the Max level and Min level in the gauge span settings Note that there are high levels of x ray radiation in your area that can affect your process measurement Power was cycled on the gauge elec
85. lation Protect from liquid any insulation between the measuring assembly and the process The absorption of a liquid such as water can affect the gauge indication because it blocks some radiation 16 LFXG D Technical Reference Manual Installation Avoid internal obstructions The best possible installation of a nuclear level gauge is on a vessel that has no internal obstructions example agitator baffle man ways directly in the path of the radiation beam If one of these obstructions is present it can shield the radiation from the detector causing an erroneous reading If the vessel has a central agitator the source holder and detector can mount to the vessel on an arc other than a diameter so the beam of radiation does not cross the agitator You can avoid other obstructions this way Avoid external obstructions Any material in the path of the radiation can affect the measurement Some materials that are present at the time of calibration pose no problem because the calibration accounts for their effect Examples e Tank walls e Liners e Insulation However when the materials change or you introduce new ones the gauge reading can be erroneous Examples e Insulation that you add after calibration absorbs the radiation and causes the gauge to erroneously read upscale e Rapidly changing tank conditions due to material buildup Regular standardizations compensate for slowly changing tank conditions due to materia
86. lect linearizer data Procedure 14 To calculate the linearizer 1 In Diagnostics TB 569 select CALCULATE_LINEARITY _NOW and choose calculate linearity now This parameter automatically reverts back to not calculating linearity when complete 2 In Diagnostics TB 569 select LINEARIZER_PERCENT_SPAN_1 and LINEARIZER_PERCENT_SPAN_2 parameter to view the values This displays the new 41 point linearizer table that is in use by the gauge 66 LFXG D Technical Reference Manual Calibration Step 5 Calculate calibration After collecting the high and low level calibration data and calculating the linearity the level transmitter is ready to make the calibration calculation Calculate the calibration using the Process TB 449 parameter list Calculating the calibration result Procedure 15 To calculate the calibration results 1 From Process TB 449 select CALCULATE_CALIBRATION_NOW This variable automatically reverts back to no calibration calculation after the calibration recalculation 2 Select COUNTS_LOW and COUNTS_ HIGH to see if the calibration results are good LFXG D Technical Reference Manual 67 Calibration When a new calibration may be necessary Under most circumstances you do not need to repeat the calibration procedure The system requires only periodic standardization to compensate for drifts over time However certain events necessitate a new calibration The events are e Measurement of a new process appli
87. linear table can use data from linearizer look up table data points that you collect and type during the calibration process Table linear Use this option for a simple method calibration This option enables you to use a linear straight line set of data for a linearizer look up table You do not need to collect linearizer table data points The straight line linearizer calculates from the high and low level calibration points This requires you to perform the following e Two point calibration e Calculate the calibration This is not as accurate because it does not compensate for the non linearity of a radiation transmission measurement LFXG D Technical Reference Manual 57 Calibration Choosing a linearizer method Procedure 9 To choose a linearizer method ile From Setup TB 508 parameters list select LINEARIZER_TYPE 2 Click the scroll bar to see the choices 3 Select either table linear or table nonlinear 58 LFXG D Technical Reference Manual Calibration Checking the gauge repeatability Check the level transmitter measurement repeatability before performing the calibration If using the menus interface access the Data collect function from the Calibrations menu Process TB 449 to enable simple measurement of the process without altering the calibration or standardization values It enables the system to measure the process and report the number of sensor counts For more information about counts and the calculation
88. llection of data points nearest the Maximum but not higher and Minimum but not lower levels occurs during calibration Refer to the Two Point Cal procedure in this manual for the steps necessary to collect these data points In Figure 13 stars indicate the Maximum and minimum level data points Figure 12 illustrates the effect on the final output of using the non linear table vs the linear table for the linearizer Using the non linear table linearizer in the standard method produces a linear output Using the linear table linearizer table produces a non linear output 52 Max Level Standard Indicated i Level Min Level Min Level Actual Max Level Level Figure 12 Indicated level vs actual level LFXG D Technical Reference Manual Calibration Standard calibration method A standard calibration method requires collection of intermediate data points Use the Linear data collect function from the TB parameters to collect these data points In Figure 13 circles indicate the intermediate data points Cal Low Counts Raw Sensor Counts Cal High Counts Min Max Level Level Cal Cal Low High Level Level Actual Level eng units Figure 13 Linearizer data collected at various process levels Internal software calculates a linearizer curve based on data points The curve is the most accurate between the Cal Low Level and Cal High Level as shown in Figure 16 For this reason it is best to take the
89. locks used to perform a control algorithm meters The least common multiple of all the loop times on a given link A layer of the FOUNDATION Fieldbus communication stack that contains objects that other layers of the communication stack use such as Data Link FAS and FMS You can read and write SM and NM objects over the fieldbus using FMS Read and FMS Write services Communication that occurs at times that are not predetermined Memory that does not require electricity to hold data continued on next page 115 Appendix II Glossary Table 18 Terms and meanings continued Term Meaning OOS Out of service Operator The verification an operator performs when receiving a fieldbus acknowledgment alarm Output parameter Parameter PC Physical device Physical device tag PLC Poll Process variable RC Resource block S Sample type Stale Tag TB 116 message A block parameter that sends data to another block One of a set of network visible values that makes up a function block Personal computer A single device residing at a unique address on the fieldbus A user defined name for a physical device Programmable log control A device with multiple inputs and outputs that contain a program you can alter To repeatedly inspect a variable or function block to acquire data A common fieldbus function block parameter representing some value in the process being controlled Ratio control A bl
90. m Sub codes R Diagnostics TBs TRANSDUCER_STATE In Process Setup and Deactivates or disables the cyclic commands of the transducer Ww Diagnostics TBs DEVICE_ERR In Process Setup and Gauge specific errors that have occurred R Diagnostics TBs BLOCK_ALM_ACTIVE In Process Setup and Block configuration alarms R Diagnostics TBs 118 continued on next page LFXG D Technical Reference Manual Appendix Ill Parameters Table 19 Transducer block parameters continued Mode Parameter Description R W The measured value and status available to the Function Block ect Mode Sub parameter Description R W A numerical quantity entered by a user or calculated by VALCE an algorithm wW Digital transducers unlike their analog versions can detect faults that make the measurement bad or prevent the actuator from STATUS responding This additional valuable information will be passed along with each transmission of a data value in the form of a status attribute Choices are made in the QUALITY SUBSTATUS and Limits sub parameters Choices are e Bad PRIMARY_VALUE QUALITY e Uncertain Ww In Process and Diagnostics e Good_Noncascade TBs e Good Cascade Choices are NonSpecific LastUsableValue SUBSTATUS SubstituteValue w e InitialValue e SensorConversionNotAccurate e EngUnitRangeViolation e Subnormal Choices are e NotLimited LIMITS e _ LowLimited WwW e HighLimited e Cons
91. n be set it the transducer block parameters X ray alarm setup The x ray alarm compensates for false indicated process values that occur when the gauge detects external radiographic sources Vessel weld inspections often use portable radiographic sources Detection of x rays by the gauge causes a false low reading and adversely affects any control based on the gauge output When the gauge detects a radiation field above a set threshold as a percentage of the cal low counts value it sets the PV output at its value 10 seconds before the detection of the x ray interference until the radiation field is back to the normal level or until a time out period of 60 minutes Threshold Threshold is the percentage beyond the calibration low counts that triggers x ray interference suppression Default value 1 Setting up the x ray alarm parameters Proceaure 6 To set the x ray alarm parameters i From Setup TB 508 parameters click XRAY_THRESHOLD 2 Type the percentage value beyond the calibration low counts that triggers x ray interference suppression 46 LFXG D Technical Reference Manual LFXG D setup Auxiliary input setup Auxiliary input or compensation configuration requires the setup of the following e Secondary filter value e Compensation selection e Compensation source The auxiliary input is an option for the fieldbus level transmitter to receive a frequency signal With special software the frequency signal incorporates
92. n reach us 24 hours a day Table 4 Contact information Contact Information Telephone Number Monday through Friday 8 00 A M 5 00 P M 1 513 272 0131 EST Eastern Standard Time Emergencies Follow the voice mail 1 513 272 0131 instructions Fax 1 513 272 0133 In addition VEGA provides field service for customers outside the U S and Canada Customers outside the U S and Canada can also contact their local VEGA representative for parts and service When calling with a question if possible please have the following information ready x VEGA Customer Order C O Number Location on the engraved label on the source holder x Sensor serial number Location on the sensor housing inside the external housing LFXG D Technical Reference Manual 7 Introduction Principle of operation VEGA s continuous level gauge is a nuclear gauge that receives a shaped or collimated beam of radiation through the process material from the source holder The material in the vessel acts as a Shield that prevents a portion of the detector from exposure to the radiation field As the level decreases the detector senses more radiation As the level increases the detector senses less radiation Calibration of the level gauge associates the detector readings known as counts with the level of the material in engineering units System overview The LFXG D flexible detector uses VEGA s GEN2000 electronics The GEN2000 is VEGA
93. ndardize Method Figure 23 Setup transducer block 136 LFXG D Technical Reference Manual Appendix IV Transducer menus and methods interface Diagnostics TB 569 Advani Calibration Status pacha Data Collect Diagnostic History Method Method Test Mode 11 Point Linearizer Data Enter Sensor Test Method Collect Sensor Test Exit Sensor Test Method Auxiliary Input Enter Aux In Test Method Test Exit Aux In Test Method Linearizer Point Data Collect Method View Edit Linearizer Data Points Method 7 Enter Temperature Test Method Add Linearizer Data Point Method Temperature Test Exit Temperature Test Method Calculate Linearity Method New Hardware New CPU Method New Sensor Method No New Hardware Min Max History Method Figure 24 Diagnostics transducer block LFXG D Technical Reference Manual 137 Appendix IV Transducer menus and methods interface Notes 138 LFXG D Technical Reference Manual Index a count range 74 process span 74 A active area between mounting brackets 18 Adj counts 73 Advanced Functions 71 Al 111 Alarm operator acknowledgment 116 Alarm conditions 111 Alarm Type 1 in diagnostic history 94 Alarm Type 2 in diagnostic history 94 Alarm Type 3
94. nerates an alarm when the gauge detects a large increase in the radiation field This prevents control problems when external radiographic sources are in the area for vessel inspections Table 7 is a summary of the alarm type outputs 90 Error RAM corrupt LSB Sensor EEPROM corrupt FLASH corrupt Real time clock fail Internal temperature sensor failure Standardize due Source wipe due X ray detected CPU EEPROM corrupt Shutter check due New hardware new CPU Calibration error Sensor fail Process out of measurement range Sensor high voltage fail Table 7 Alarm type outputs XD_ERROR Memory Failure Lost Static Data Memory Failure Electronics Failure Device Needs Maintenance Now Device Needs Maintenance Soon Device Needs Maintenance Soon Input Failure Lost Static Data Device Needs Maintenance Soon Device Needs Maintenance Now Calibration Error Electronics Failure 00 Electronics Failure DEVICE_ERROR RAM Corrupt Sensor EEPROM Corrupt FLASH Corrupt Real time clock fail Internal temperature sensor failure STDZ due Source wipe due X ray detected CPU EEPROM corrupt Shutter check due New Hardware New CPU Calibration Error Sensor Fail Process out of measurement range Sensor high voltage fail PRIMARY_VALUE Status Uncertain Uncertain Uncertain Uncertain Uncertain Unaffected Unaffected Uncertain Uncertain Unaffected Uncertain
95. nge in process A range of integer values from 1 600 seconds is possible for this time constant entry With the digital filtering the primary filter value entry determines how many samples to use when calculating the average responding to 100 of a process step change The maximum damping entry is 100 with this type of filtering Fast cutoff Fast cutoff temporarily bypasses the RC or digital filtering when the change in process exceeds this value in engineering units between successive samples This enables the level transmitter to respond immediately to large step changes while filtering the smaller variations in the signal caused by noise and normal process variations To turn off the fast cutoff filter set the value to zero LFXG D Technical Reference Manual 41 LFXG D setup Setting the filter type primary filter value and fast cutoff parameters Procedure 3 To set the filter type primary filter value and fast cutoff lh Set up the filter type parameter 1 a From Setup TB 508 click FILTER_TYPE 1 6 Select either ere filter e digital filter 2 Set up the primary filter value parameter 2 a From Setup TB 508 click PRIMARY_FILTER_VALUE 2 6 Type the filter time constant to apply to the final PV output 8 Set up the fast cutoff parameter 3 a From Setup TB 508 click FAST_CUTOFF 3 b Type the correct value for a fast cutoff response or zero to turn the fast cutoff feature off 42 LFXG D Technical Reference Manual
96. nsducer block parameters Mode Parameter Description R W The block alarm is used for all configuration hardware connection failure or system problems in the block The cause of the alert is entered in the subcode field The first alert to become active will set the Active status in the Status attribute As soon as the Unreported status is cleared by the alert reporting task another block alert may be reported without clearing the Active status if the subcode has changed Se Mode parameter Description Sub paramete escriptio R W A discrete enumeration that is set to Unacknowledged when an update occurs and set UNACKNOWLEDGED to Acknowledged by a write from an interface R device that can confirm that the alarm has been BLOCK_ALM noticed In Process Setup and A discrete enumeration that gives an indication of Diagnostics qos ALARM_STATE whether the alert is active and whether it has been R reported The time when evaluation of the block was started and a change in alarm event state was detected TIME_STAMP that is unreported The time stamp value will be R maintained constant until alert confirmation has been received even if another change of state occurs An enumeration specifying the cause of the alert to SUB_CODE be reported R The value of the associated parameter at the time VALJE the alert was detected R XD_ERROR In Process Setup and One of the transducer error codes Block Alar
97. nt range process span Level Final level Sensor temp TEMPERATURE_VALUE Displays the internal probe s measurement of the sensor temperature 72 LFXG D Technical Reference Manual Advanced functions Sensor counts PRIMARY_RAW_COUNTS Displays the sensor counts that are true counts that are output from the sensor before application of the following e Temperature compensation e Standardize e Sensor uniformity gains Temp comp counts TEMP_COMP_VALUE Displays temperature compensated counts that are sensor counts with application of sensor temperature compensation Raw counts UNIFORMITY_GAIN_COUNTS Displays raw counts that are temperature compensated counts with application of uniformity gain Adjusted counts SUMMATION_COUNTS Displays adjusted or sum counts that are raw counts plus auxiliary raw counts In most applications that do not use auxiliary input sum counts are equal to raw counts Source decay counts SOURCE_DECAY_COUNTS Displays source decay counts that are sum counts with application of source decay gain Stdz counts STANDARD_COUNTS Displays standardize counts that are source decay counts with application of standardization gain LFXG D Technical Reference Manual 73 Advanced functions count range COUNT_RANGE_PERCENT Displays compensated measurement counts expressed as a percent of the counts at the high and low endpoints of the calibration determined with the two point calibr
98. ock that describes general characteristics of a device such as manufacturer and device name Allows only one resource block per device Seconds Specifies how trends are sampled on a device whether by averaging data or by instantaneous sampling Data that has not been updated for stale_limit number of macrocycles where the stale limits is a parameter of the connection A name you can define for a block VFD or device Transducer Block LFXG D Technical Reference Manual Appendix Ill Parameters This section lists the transducer and Al block parameters descriptions and modes that are important for the set up and calibration of the LFXG D The minimum parameters that must be set for level measurement are e Transducer Blocks e DEVICE_SELECT set to Level in Process TB 449 e FILTER_TYPE in Setup TB 508 e FAST_CUTOFF in Setup TB 508 e DATA_COLLECT_INTERVAL in Setup TB 508 e PRIMARY_VALUE_RANGE in both Process TB 449 and Setup 508 e LINEARIZER_TYPE in Setup TB 508 e LINEARIZER_VALUE optional only if using the table non linear type in Diagnostics TB 569 e LINEARIZER COUNTS optional only if using the table non linear type in Diagnostics TB 569 e Al block e XD_SCALE e OUT_SCALE e CHANNEL set to primary channel e AO block for external source auxiliary input e MODE_BLOCK e XD_SCALE e OUT_SCALE e CHANNEL set to primary channel LFXG D Technical Reference Manual 117 Appendix III Parameters Table 18 Tra
99. ormation You can use the transducer block parameters to view the following critical events e RAM corrupt e Sensor EEPROM corrupt e FLASH corrupt e Real time clock fail e Sensor temperature fail e Standardize due e Source wipe due e New hardware found e Alarm Type 3 e CPU EEPROM e Alarm Type 1 e Alarm Type 2 e Shutter check due e Sensor fail e Process out of range e Sensor voltage out of spec Use this information to determine if a problem has recently occurred and internally repaired An example of this would be an EEPROM corruption 94 LFXG D Technical Reference Manual Diagnostics and repair Viewing diagnostic history Use the Diagnostic History parameters and sub parameters to view the most recent and oldest dates of critical events Procedure 34 To view diagnostic alarms 1 From Diagnostics TB 569 select DIAG_HISTORY_NEWEST_1 The sub parameters display the following diagnostic errors Sub parameter Description DIAG_HISTORY_NEWEST_1 RAM corrupt DIAG_HISTORY_NEWEST_1 Sensor EEPROM corrupt DIAG_HISTORY_NEWEST_1 FLASH corrupt DIAG_HISTORY_NEWEST_1 Real time clock fail DIAG_HISTORY_NEWEST_1 Sensor temp fail DIAG_HISTORY_NEWEST_1 Standardize due DIAG_HISTORY_NEWEST_1 Source wipe due DIAG_HISTORY_NEWEST_1 New hardware found From Diagnostics TB 569 select DIAG_HISTORY_NEWEST_ 2 The sub parameters display the following diagnos
100. ounts for the calibration on high process W In Process TB STANDARDIZE DATE Date of the last standardization R In Setup TB STANDARDIZE POINT Process value recorded for the last standardization W In Setup TB STANDARDIZE COUNTS Sensor counts recorded for the last standardization WwW In Setup TB ST ANDABDIAE SUCCESS Indicates success or failure of the standardization R In Setup TB Raw counts from the sensor ae Mode parameter Description Sub paramete escriptio R W VALUE A numerical quantity entered by a user or w calculated by an algorithm Digital transducers unlike their analog versions can detect faults that make the measurement bad or prevent the actuator from responding This additional valuable information will be passed STATUS along with each transmission of a data value in W the form of a status attribute Choices are made in the QUALITY SUBSTATUS and LIMITS sub parameters PRIMARY_RAW_COUNTS mee soe In Process and Diagnostics TBs 2 QUALITY Uncertain WwW e Good_Noncascade e Good_Cascade Choices are NonSpecific LastUsableValue SUBSTATUS SubstituteValue w e InitialValue e SensorConversionNotAccurate e EngUnitRangeViolation e Subnormal Choices are e NotLimited LIMITS e LowLimited WwW e HighLimited e Constant SECONDARY_RAW_COUNTS sede In Process and Diagnostics Raw counts from the auxiliary input WwW Se anes Compensated sensor counts at low calibration point Source and stdz R gain appl
101. ource wipe 104 Procedure 38 To view due date of shutter check 104 Procedure 39 To replace the CPU or power supply board 106 xii LFXG D Technical Reference Manual Preface Explanation of symbols Table 2 lists the symbols that the manual and instrument use Table 2 Explanation of symbols In the manual Radiation notice Information concerning radioactive materials or radiation safety information is found in the accompanying text Caution Warnings concerning potential damage to the equipment or bodily harm are found in the accompanying text On the instrument AC current or voltage A terminal to which or from which an alternating sine wave current or voltage may be applied or supplied DC current or voltage A terminal to which or from which a direct current voltage may be applied or supplied Potentially hazardous voltages A terminal on which potentially hazardous voltage exists LFXG D Technical Reference Manual xiii Preface Notes xiv LFXG D Technical Reference Manual Preface Foundation Fieldbus system In order to use the level gauge you must install and configure the Foundation Fieldbus system Using VEGA s Foundation fieldbus device description DD you can view or edit the variables in VEGA s Foundation fieldbus gauge transducer block in two of the following ways e Use the transducer block variable list directly e Use menus provided by VEGA s DD The menu structure in VE
102. r supply board ae o foe gt Boe 10 11 12 13 14 15 Procedure 39 To replace the CPU or power supply board Turn off power to the gauge Remove the housing cover Remove the plastic electronics cover Remove the terminal wiring connector Remove the three 3 screws holding the electronics package in place Carefully pull the electronics package out of the housing Remove the appropriate board from the clamshell assembly by removing the three 3 mounting nuts Note If you are changing the CPU board you must move the old firmware chip to the new board if the new board firmware is different Carefully reconnect any ribbon cables Install the electronics package in the housing Replace the three 3 mounting nuts Reconnect the terminal wiring connector Install the plastic electronics cover Install the housing cover Turn on the power to the unit Connect a HART communicator to the unit and verify that the unit is operational Note If you change the CPU board a New Hardware Found error message normally appears when you connect with the HART communicator In Ohmvie2000 click Diagnostics New hardware New CPU and click OK for a new backup of EEPROMS 106 Mounting Nuts LFXG D Technical Reference Manual Diagnostics and repair Requesting field service To request field service within the U S and Canada call 513 272 0131 from 8 00 A M to 5 00 P M Monday through Friday For emergency se
103. re permitted You must use a conduit seal off in the proximity of the housing when the location is in a hazardous area Requirements for the actual distance must be in accordance with local code If you use only one conduit hub plug the other conduit hub to prevent the entry of dirt and moisture Commissioning the gauge The process of commissioning the gauge includes the following e Taking appropriate radiation field tests e Checking the pre programmed setup parameters e Calibrating on process e Verifying the working of the gauge VEGA Field Service Engineers typically commission the gauge It is necessary to remove the source holder lock the first time the gauge takes measurements in the field Only persons with a specific license from the U S NRC Agreement State or other appropriate nuclear regulatory body may remove the source holder lock Note Users outside the U S must comply with the appropriate nuclear regulatory body regulations in matters pertaining to licensing and handling the equipment Can you remove the source holder lock If you are in doubt whether you have permission to remove the source holder lock Do not The license sets limits on what the user can do with the gauge Licenses fall into two categories 1 General 2 Specific It is up to the user to review the license to determine if they have the appropriate permission to perform any of the following e Disassemble LFXG D Technical Refer
104. ring or exiting a test mode 82 LFXG D Technical Reference Manual Advanced functions Sensor test mode The sensor test mode simulates the sensor output at a user defined number of raw counts This is before application of the following e Temperature compensation e Sensor uniformity gain e Standardize gain The true sensor output is ignored while the transmitter is in sensor test mode Sensor test mode is extremely useful for verifying the electronics and software response to input counts without having to perform the following e Change the process e Shield the source e Vary the radiation field While in sensor test mode after entering the desired number of counts it may be useful to look at the Process chain parameters to view the variables affected by the raw counts value To view the Process chain parameters refer to page 72 The transmitter continues to operate in sensor test mode until it times out after one hour or until you choose Exit test mode Starting sensor test mode Procedure 24 To start sensor test mode 1 From Diagnostic TB 569 select SENSOR_TEST_MODE 2 Select In test mode 3 From Diagnostic TB 569 select PRIMARY_RAW_COUNTS to write the test mode counts Exit sensor test mode Procedure 25 To exit sensor test mode i From Diagnostic TB 569 select SENSOR_TEST_MODE 2 Select Normal mode LFXG D Technical Reference Manual 83 Advanced functions Auxiliary input test mode The auxiliary inpu
105. ritical process and equipment conditions remain unchanged The gauge requires only a periodic standardization to compensate for changing conditions Choosing the calibration method For each installation you must choose a method to calibrate the gauge In almost all cases the standard method is the best Calibration methods Standard method Simple method Use if the gauge is required to be repeatable Use if the gauge is only required to be and precisely or linearly indicate the levelof repeatable but need not precisely indicate process throughout the span the level of process Use for vessels in which it is critical to know Typically used for surge bins or other vessels the precise level that are under control and that maintain one level The linearizer type chosen must be Non The linearizer type chosen must be Linear linear table table Note The simple method produces a measurement indication that is repeatable but not precise between the Cal Low Level and Cal High Level points The measurement indication is not linear with respect to the actual process level In some applications precision is not critical and this method is valid LFXG D Technical Reference Manual 51 Calibration Theory of calibration Both calibration methods Enter the values that define the maximum and minimum levels to measure These parameters are Max Level and Min Level and must be set correctly before any of the calibration steps Co
106. rvice after hours call 513 272 0131 and follow the voice mail instructions Returning equipment for repair to VEGA When calling VEGA to arrange repair service have the following information available Vv M Product model that is being returned for repair Description of the problem VEGA Customer Order C O Number Purchase order number for the repair service Shipping address Billing address Date needed Method of shipment Tax information LFXG D Technical Reference Manual 107 Diagnostics and repair Notes 108 LFXG D Technical Reference Manual Appendix I Special applications This chapter provides application specific information for special installations If your application is not in this chapter you may find application specific information on the certified drawings The certified drawings are supplied by VEGA If you have other application questions contact VEGA Field Service in the U S or Canada at 513 272 0131 or your local representative outside of the U S or Canada Internal heater kit for applications requiring a rating of 50 C A heater kit option is available for the LFXG D for applications that require a 50 C 58 F temperature rating With the heater option the internal temperature of the unit rises approximately 20 C 68 F degrees The features of the heater are as follows e The heater kit does not affect the functionality of the LFXG D in
107. s Storing the gauge Avoid storage at temperatures below freezing Store the gauge indoors in an area that has temperature control between 10 C and 35 C 50 F and 95 F and less than 50 relative humidity Store equipment in dry conditions until installation Certifications This gauge is designed for certi cation compliance from the following agencies ATEX Standard CCOE India CEPEL INMETRO Brazil CSA FM Standard GOST B Standard GOST R Standard IECex JIS Japan KTL Korea NEPSI China LFXG D Technical Reference Manual Introduction Safety Information for EX Areas Please note the EX speci_ c safety information for installation and operation in EX areas OHMAR T mmm IEC VEGA MAR 2000 CINCINNATI OHIO U S A 45209 e Patent No 6 198 103 GEN2000 IECEx CSA 09 0005X MODEL INPUT 115V 25 W 50 60 Hz CONTACT RATINGS 240VAC 2A OR 24VDC 2A OR 1 4HP 120VAC Ex d IIC T6 Ta 20 C TO 60 C OR Ex d IIB H2 T6 Ta 50 C TO 60 C IP66 WARNING USE A CABLE OR WIRING RATED FOR AT LEAST 90 C WARNING POTENTIAL ELECTROSTATIC CHARGING HAZARD SEE INSTRUCTIONS WARNING DO NOT OPEN WHEN AN EXPLOSIVE ATMOSPHERE MAY BE PRESENT Figure 1 IECex Label 4 LFXG D Technical Reference Manual LFXG D System Accuracy Active Lengths Typical Sources Power Requirements Signal Cable GEN2000 Electronics Housing Weight Relay Output Fieldbus Communication Auxiliary
108. s The level transmitter acknowledges or resets the process alarm when the process value returns back to within span Depending on your usage of the process alarm relay you may want to install a process alarm override switch to manually turn off an annunciator when the level transmitter relay energizes X ray alarm The x ray alarm compensates for false indicated process values that occur when the gauge detects external radiographic sources For example vessel weld inspections often use portable radiographic x ray sources X rays that the gauge detects cause a false low reading and adversely affect any control based on the gauge output The x ray alarm can alter the output to indicate the alarm condition The level transmitter enters the x ray alarm condition when it detects a radiation field above a set threshold The gauge sets the output to its value 10 seconds before the condition The PRIMARY_VALUE status is set to uncertain and the DEVICE_ERROR is set to X ray detected The XD_ERROR parameter is set to Input Failure The standard x ray alarm only triggers when the counts are greater than the cal low count value These counts are found on the process variable menu If the x ray source is setup so that the counts increase but do not go above the cal low counts the x ray alarm does not trigger and the gauge reads the x ray interference as a true process shift LFXG D Technical Reference Manual 93 Diagnostics and repair History inf
109. s performed to produce the final process value see the Process Chain section in the Advanced Functions chapter You can perform a data collect three or four times on the same level to check the repeatability of the sensor If the sensor counts vary widely you should increase the Data collection interval parameter from the Setup TB 508 Refer to page 39 for further information Performing a data collect Procedure 10 To perform a data collect 1 In Setup TB 508 click DATA_COLLECT_INTERVAL 2 Type the number of seconds that the counts are averaged when calculating the calibration counts Usually this value is 60 seconds or greater 3 In Setup TB 508 select DATA_COLLECT_EXECUTE parameter and select execute data collect The TIME_REMAINING variable counts down until it reaches zero This variable displays the number of seconds remaining for the data collect 4 View the AVERAGE_COUNTS in the Process TB 449 5 Record the count for use in later procedures See Table 6 on page 60 LFXG D Technical Reference Manual 59 Calibration Calibrating the gauge The standard calibration method involves five main steps 1 2 3 4 5 Setting the low level and collecting Cal low data Setting the high level and collecting Cal high data Collecting linearizer data Calculating the linearizer Calculating the calibration Perform these data collection steps in any sequence Your ability to empty and fill the vessel
110. s A B C amp D e CSA Class II Div 1 Groups E F amp G e CSA Class Il Div 2 Groups E F amp G e ATEX Certificate 112 G D EEx d IIC TP6 IP66 20 C 60 C or II2G EEX d IIB H2 T6 50 C 60 C e NEMA Type 4X IP66 Non hazardous locations 20 C 60 C 4 F available 140 F option for lower temperatures 0 95 non condensing Tested to IEC 68 2 6 IEC 68 2 27 and IEC 68 2 36 Cast aluminum ASTM A 357 Polyester Powder Coating 0 0015xLength mm 5 44kg 0 084xLength inches 12lb Diagnostic alarm or process high low alarm function 6A at 240VAC or 6A 24VDC SPDT Form C or 1 4HP at 120VAC Foundation Fieldbus communication protocol Frequency input 0 100 kHz Optional NORM or vapor phase compensation multiple gauge linking amp others FLASH and two EEPROMs 6V Memory Corruption CPU Active Auxiliary High Voltage Relay amp Field Strength e Power specifications change to 115VAC or 230VAC if an internal heater kit is used For more information see page 109 LFXG D Technical Reference Manual 5 Introduction Typical applications VEGA level gauges accurately indicate the level of liquids or bulk materials throughout a range on vessels reactors or tanks In order to achieve a level indication over the desired length it may be necessary to use more than one detector The way these multiple detectors link together depends upon the types of detectors used Specific d
111. s cable for conformance testing has the following specifications e Shielded twisted pair e 18AWG 8mm e Maximum total length including spurs 1 900m 6 232ft e Maximum spur length 120m 394ft An alternate preferred field bus cable has the following specifications e Multiple twisted pair with an overall shield e Size 22AWG 32mm e Maximum total length including sours 1 200m 3 936ft e Maximum spur length 100m 328ft Use of this cable will be in both new and retrofit installations where multiple fieldbus systems are run in the same area of the plant If using DC power signal and power can run on a single cable 4 wire hookup two wires for power two for fieldbus interconnect All wiring must have insulation suitable for at least 250V Caution Use supply wires suitable for 40 C 104 F above surrounding ambient temperature Communication To install and configure the hardware and software for your fieldbus system refer to the manuals that came with your fieldbus hardware and software The installation and configuration may vary depending on the operating system 22 LFXG D Technical Reference Manual Installation Conduit Conduit runs must be continuous and you must provide protection to prevent conduit moisture condensation from dripping into any of the housings or junction boxes Use sealant in the conduit or arrange the runs so that they are below the entries to the housings and use weep holes whe
112. s it into voltage pulses e The microprocessor receives these voltage pulses after amplification and conditioning by the photomultiplier tube e The microprocessor and associated electronics convert the pulses into a calibratable output Power Supply Board Terminal Block Ss RS 485 Ground if applicable CPU Board nternal Housing AN x Ground Screw Z AN f SN Hae ee DY py y 4 raj N I j Da n AA Figure 4 LFXG D exploded view 10 LFXG D Technical Reference Manual Introduction What is Fieldbus Fieldbus is a digital bus that is similar to a computer network Fieldbus enables two way data communication between the gauge and the fieldbus PC The fieldbus gauge has the following features e Implements control functions algorithms in the actual device instead of a central computer e Ensures device interoperability because of device registration with the Fieldbus Foundation e Uses device specific device description DD for configuration e Sends data directly between devices which speeds up control functions This manual assumes a working knowledge of fieldbus terminology and practices The procedures in this manual are appropriate for FOUNDATION Fieldbus Links A FOUNDATION fieldbus network consists of devices connected by a serial bus also known as a link Special devices known as bridges can separate the links Devices The fieldbus network can have a maximum of 32 devices
113. s newest compact electronics that support 4 20 mA HART FOUNDATION Fieldbus protocol or frequency output The level measurement system consists of three main components 1 Source holder 2 FiberFlex flexible detector assembly LFXG D 3 Communication device Fieldbus host Fieldbus power supply JO Fieldbus host Figure 2 System overview 8 LFXG D Technical Reference Manual Introduction The following statements describe the source holder e A cast or welded steel device that houses a radiation emitting source capsule e Directs the radiation in a narrow collimated beam through the process vessel e Shields the radiation elsewhere e The model chosen for each particular system depends on the source capsule inside and the radiation specification requirements e A shutter on the source holder either completely shields the radiation Source off or allows it to pass through the process source on Figure 3 Typical source holder LFXG D Technical Reference Manual 9 Introduction Scintillator model LFXG D The following statements describe the functions of the FiberFlex flexible detector assembly model LFXG D e Mounts opposite the source holder e Inside the flexible detector is a scintillation material e The scintillation material produces light in proportion to the intensity of its exposure to radiation e A photomultiplier tube detects the scintillator s light and convert
114. s out of measurement range Sensor high voltage fail 122 continued on next page LFXG D Technical Reference Manual Appendix Ill Parameters Table 19 Transducer block parameters continued Mode Parameter Description R W Specifies the type of linearizer used for the PV calculation This can be a LINEARIZER TYPE linear table or a non linear table calculated from the linearizer data points In Setup TB Choices are w e table nonlinear e table linear fas eae el Reserved for density applications R Specifies the type of radiation source being used This setting determines the type of source decay to use Choices are SOURCE_TYPE e Cs137 n In Setup TB e Co60 e AM241 e Cf252 e No Source Rere ieee Filter time constant applied to the final PV output Ww Specifies the type of filter used on the PV output and auxiliary input Can be an RC analog filter or rectangular window digital filter ellie ie Choices are WwW etup e re filter e digital Fast response cutoff is change in successive process value samples at eas ae which filtering is bypassed Enables response to large process step Ww P changes mE 2 Reserved for density applications R En ii ESHOER The set percentage beyond Counts Low that will trigger X ray suppression Ww Select the units to be used for the vessel ID value Choices are LINEAR_UNITS e in In Setup TB e ft W e cm e mm e m fee anaes 3
115. sor temperature test mode This allows entry of a TEMPERATURE TEST MODE specific temperature value over riding the measured sensor temperature In Diagnostics TB Choices are Ww e Normal mode e In test mode TEMPERATURE_VALUE This variable shows the current temperature reading of the unit sensor Ww In Process and Diagnostics TBs electronics 130 continued on next page LFXG D Technical Reference Manual Appendix Ill Parameters Table 19 Transducer block parameters continued Mode Parameter Description R W Displays the date of the most recent occurrence of each diagnostic error ae Mode Sub parameter Description R W DIAG_HISTORY_NEWEST_1 DIAG_HISTORY_NEWEST_1 RAM corrupt R In Diagnostics TB DIAG_HISTORY_NEWEST_1 Sensor EEPROM corrupt R DIAG_HISTORY_NEWEST_1 FLASH corrupt R DIAG_HISTORY_NEWEST_1 Real time clock fail R DIAG_HISTORY_NEWEST_1 Sensor temp fail R DIAG_HISTORY_NEWEST_1 Standardize due R DIAG_HISTORY_NEWEST_1 Source wipe due R DIAG_HISTORY_NEWEST_1 New hardware found R Displays the date of the most recent occurrence of each diagnostic error Aer Mode Sub parameter Description R W DIAG_HISTORY_NEWEST_2 Alarm Type 3 R DIAG_HISTORY_NEWEST_2 CPU EEPROM R oie DIAG_HISTORY_NEWEST_2 Alarm type 1 R DIAG_HISTORY_NEWEST_2 Alarm type 2 R DIAG_HISTORY_NEWEST_2 Shutter check due R
116. systems correspond to the information available at the time of printing VEGA Americas Inc Cincinnati Ohio USA 2011 Subject to change without prior notice 31400 US 110301
117. t test mode simulates the auxiliary input frequency at a user defined number of counts The effect of auxiliary input counts depends on the auxiliary input mode Examples are e Temperature probe e Flow meter e Second transmitter While in auxiliary input test mode after you enter the desired number of counts it may be useful to look at the Process chain screen to view the variables affected by the auxiliary input counts value To view the Process chain parameters refer to page 72 The transmitter continues to operate in auxiliary input test mode until it times out after one hour or until you choose Exit auxiliary input test mode Start auxiliary input test mode Procedure 26 To start auxiliary test mode ile From Diagnostic TB 569 select SECONDARY_TEST_MODE 2 Select In test mode Gh From Diagnostic TB 569 write the test mode counts to variable SECONDARY_COUNTS Exit auxiliary input test mode Procedure 27 To exit auxiliary test mode 1 From Diagnostic TB 569 select SECONDARY_TEST_MODE 2 Select Normal mode 84 LFXG D Technical Reference Manual Advanced functions Relay test mode Relay test mode enables the user to manually toggle the relay on or off to test the contacts This is useful for verifying the functioning of alarm annunciators Start relay test mode Procedure 28 To start relay test mode 1 From Process TB 449 select RELAY_STATUS_ TEST 2 Type 1 to energize or 2 to de energize and click OK Exit relay
118. tant PRIMARY_VALUE_RANGE In Process and Diagnostics TBs The High and Low ra nge limit values the engineering units code and the number of digits to the right of the decimal point to be used to display the Primary Value Sub parameter Description Mode R W EU_100 The engineering unit value that represents the upper end of range of the associated block parameter Ww EU_0 The engineering unit value that represents the lower end of range of the associated block parameter Ww UNITS_INDEX Device Description DD units code index for the engineering unit descriptor for the associated block value The units in this range must match the units in the Analog Input AO block Choices are e Counts per Second Unitless in ft cm mm M DECIMAL The number of digits to the right of the decimal point that should be used by an interface device in displaying the specified parameter LFXG D Technical Reference Manual continued on next page 119 Appendix III Parameters Table 19 Transducer block parameters continued Mode Parameter Description R W Select the operational mode of the gauge The gauge must be power cycled including the fieldbus connection after this change is made DEVICE_SELECT Choices are a In Process TB e Undefined e Level e Density Select the type of level compensation required as necessary Choices are
119. test the detector assembly with the fieldbus configuration device a personal computer Bench testing enables you to check the following e Power e Communication e Initial setup software parameters e Some diagnostics AC or DC power UOOUUUUUU0U 1 Fieldbus power supply Fieldbus configuration device Figure 5 Bench test setup LFXG D Technical Reference Manual 15 Installation Location considerations When you ordered the gauge VEGA sized the source for optimal performance Notify VEGA before installing the gauge if its location differs Satisfactory operation depends on proper location Note Locate the source holder where process material cannot coat it This ensures the continuing proper operation of the source ON OFF mechanism if applicable Many regulatory bodies for example the U S NRC require periodic testing of the ON OFF mechanism See the Radiation Safety for U S General and Specific Licensees Canadian and International Users manual and the Radiation Safety Manual Addendum of Reference Information CD that came with the source holder and the appropriate current regulations for details Stable temperature Mount the gauge on a portion of the line where the temperature of the process material is relatively stable Process temperature can affect the gauge indication The amount of the effect depends on e Sensitivity of the gauge e Temperature coefficient of the process material Protect insu
120. the explosion proof housing pipe cap FLASH corrupt LED pattern The FLASH chip stores the gauge firmware The transmitter does not operate if the FLASH chip is corrupt A fieldbus device that connects to the transmitter displays the message No Device Found In this situation the LED bank displays a distinctive pattern shown in Figure 21 On 0 Blinking Off T zZ T lt z j z k x a a lk p s lt x a k is lt Se ad a Kc Normal LED pattern Memory corrupt pattern Figure 21 CPU LED indicators LFXG D Technical Reference Manual 99 Diagnostics and repair CPU board LED summary table Table 12 CPU board LED summary LED Description Mem Memory corruption HAR Fieldbus T communication indicator CPU Central processing unit Aux Auxiliary input frequency signal indicator HV Sensor high voltage Field Radiation field indicator 100 Normal Condition OFF OFF blinks when receiving Fieldbus messages Blinks at rate of once per second Blinks if auxiliary input is present Off if no auxiliary input is present On high voltage is within specification Cycles in proportion to radiation field intensity at detector On for 10 seconds for each mR hr then off for 2 seconds Use LED 5 which blinks 1 time second to time LED1 for field indicator Error Condition Blink Pattern 1 CPU EEPROM corrupt 2 Sensor EEPROM corrupt 3 Both EEPROMs corrupt 4 R
121. tic errors Sub parameter Description DIAG_HISTORY_NEWEST_2 Alarm Type 3 DIAG_HISTORY_NEWEST_2 CPU EEPROM DIAG_HISTORY_NEWEST_2 Alarm type 1 DIAG_HISTORY_NEWEST_2 Alarm type 2 DIAG_HISTORY_NEWEST_ 2 Shutter check due DIAG_HISTORY_NEWEST_2 Sensor fail DIAG_HISTORY_NEWEST _ 2 Process out of range DIAG_HISTORY_NEWEST 2 Sensor voltage out of spec From Diagnostics TB 569 select DIAG_HISTORY_OLDEST_1 Sub parameter Description DIAG_HISTORY_OLDEST_1 RAM corrupt DIAG_HISTORY_OLDEST_1 Sensor EEPROM corrupt DIAG_HISTORY_OLDEST_1 FLASH corrupt DIAG_HISTORY_OLDEST_1 Real time clock fail DIAG_HISTORY_OLDEST_1 Sensor temp fail DIAG_HISTORY_OLDEST_1 Standardize due DIAG_HISTORY_OLDEST_1 Source wipe due DIAG_HISTORY_OLDEST_1 New hardware found From Diagnostics TB 569 select DIAG_HISTORY_OLDEST_2 Sub parameter Description DIAG_HISTORY_OLDEST_2 Alarm Type 3 DIAG_HISTORY_OLDEST_2 CPU EEPROM DIAG_HISTORY_OLDEST_2 Alarm type 1 DIAG_HISTORY_OLDEST_2 Alarm type 2 DIAG_HISTORY_OLDEST_2 Shutter check due DIAG_HISTORY_OLDEST_2 Sensor fail DIAG_HISTORY_OLDEST 2 Process out of range DIAG_HISTORY_OLDEST 2 Sensor voltage out of spec LFXG D Technical Reference Manual Diagnostics and repair Hardware diagnostics Special installation maintenance or operating instructions If it is ne
122. tics TB 569 select DAYS _TILL_SHUTTER_CHK The parameter value displays when the next source holder shutter check is due 104 LFXG D Technical Reference Manual Diagnostics and repair Spare parts Contact VEGA Field Service at 1 513 272 0131 for parts service and repairs Outside the U S contact your local VEGA representative for parts service and repairs Field repair procedures Very few parts are field repairable but you can replace entire assemblies or boards The following parts are replaceable e CPU circuit board e Power supply circuit board Caution Use great care to prevent damage to the electrical components of the gauge VEGA recommends appropriate electrostatic discharge procedures Replacing the CPU or Power supply board You may have to replace a circuit board if there is damage to one of its components Before replacing a circuit board check the troubleshooting section or call VEGA Field Service to be sure a replacement is necessary The sensor EEPROM contains a backup of the CPU board EEPROM After physically replacing the CPU board you must perform a memory backup to update the CPU board EEPROM with the information in the sensor board EEPROM Perform the memory back up in the New hardware feature from the Advanced Functions menu Refer to page 80 for information on the Advance Functions New Hardware feature LFXG D Technical Reference Manual 105 Diagnostics and repair Replace the CPU or powe
123. tions 0 ccceeeseeeeeeeeeeteeeeneeeee 20 Table 6 Standard calibration sensor counts and levels record 60 Table 7 Alarm type OUtDUtS cccceeeeeeeneeceeeeeeeaeeeeeee scenes teaeeesaeeneneeeed 90 Table 8 Diagnostic alarm conditions cccecceceeeeesteeeeesnteeeeeesaeeeeseaaas 92 Table 9 Power supply board test point labels and descriptions 98 Table 10 CPU board test point labels and descriptions 008 98 Table 11 Power supply board LED descriptions conditions and recommendations 98 Table 12 CPU board LED SUMMAL cccceceeeeeeeeeteeeeeteteeetaeeteaes 100 Table 13 Fieldbus troubleshooting ccccceeeeeeeseeeeeeeeseeeeeseeeteaes 102 Table 14 Periodic maintenance schedule n 103 Table 15 Heater Kit part NUMDEIS eee eeeeeeeeeeeeeeeeeeeneeeeeseeenaeens 109 Table 16 Measurements and values cceccceeeeeeeeeeeteeeeeeeeaeeeeeeteees 111 Table 17 Terms and MEQNINGS ccccceeseeceeeeeeeeeeeeeteeeeeseaeeeteneeteaes 111 Table 18 Transducer block parameters cccceeseeeeeteeeeteeesseeeeees 118 LFXG D Technical Reference Manual vii Preface Notes viii LFXG D Technical Reference Manual Preface Figures Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 IECex Label 4 System overview 8 Typical source holder 9 LFXG D exploded view 10 Bench test setup 15 Cond
124. to the PV Scale range Reset the device For instructions on how to configure alarms refer to the user manual for information on configuring alarms If the parameter is not read only refer to the user manual that came with your host system Refer to the user manual that came with your host system Set the RESTART parameter in the Block window to Processor or Default If the problem persists replace the device Refer to the user manual that came with your host system Refer to the user manual that came with your host system LFXG D Technical Reference Manual Diagnostics and repair Maintenance and repair Periodic maintenance schedule Since the VEGA level transmitter contains no moving parts very little periodic maintenance is required We suggest the following schedule to prevent problems and to comply with radiation regulations Table 14 Periodic maintenance schedule Description Frequency Procedure Standardize As required by process conditions Calibration chapter Source holder Every six months unless otherwise Radiation safety instructions shipped shutter check required by applicable nuclear regulatory separately with source holder and following agency instructions Every three years unless otherwise Radiation safety instructions shipped Source wipe required by applicable nuclear regulatory separately with source holder and following agency instructions Source wipe and shutter check recording The VEGA lev
125. tronics but not to the Fieldbus network Action Consult VEGA Field Service If it persists contact VEGA Field Service for advice Contact VEGA Field Service Contact VEGA Field Service if the clock does not run to get firmware version 2200 06 or higher Verify the sensor temperature If the temperature reads 0 5 C constantly the probe may be broken and the CPU board may need replacement Contact VEGA Field Service Log a shutter check in Diagnostics TB 569 parameters list To check for recurrence cycle the power to the unit If it persists contact VEGA Field Service for advice Contact VEGA Field Service Contact VEGA Field Service Perform a new standardization procedure Perform a shutter check Acknowledge record shutter check new in the Diagnostics Transducer Block parameters list Contact VEGA Field Service first If they concur identify the new hardware using the Diagnostics TB 569 parameter list Contact VEGA Field Service Contact VEGA for further information Acknowledge alarm in the Diagnostics TB TB 569 parameter list Set the HART Info parameter to 1 apply changes LFXG D Technical Reference Manual Diagnostics and repair Process alarm The process alarm alerts users when the process level is above or below the process span The process alarm works only with the output relay No fieldbus messages gauge status diagnostics or history information saves for the process alarm
126. ually increases the gauge accuracy Before starting the cal low data collection Fill vessel to its low level x Have actual level value ready to enter Setting the cal low level Perform the following procedure to set the cal low level the Process TB 449 parameters Procedure 11 To set the cal low level le Complete the data collect procedure for the low level 2 In Process TB 449 select CAL_POINT_LO_COUNTS and type the value of the AVERAGE_COUNTS recorded for the cal low level 3 Select CAL_POINT_LO and type the process setting value LFXG D Technical Reference Manual 61 Calibration Step 2 Set high level Setting the high level for calibration requires the following activities e Measurement with the level transmitter of the high process condition e Entry of the actual level This sets the gain of the calibration curve Perform this procedure either before or after setting the low level Note You must perform data collection for the low and high level within ten days of each other for a good calibration The low and high values must be more than 10 percent of the process span apart for the most accurate calibration Increasing the process span usually increases the gauge accuracy Before starting the cal high data collection m Fill vessel or pipe with high process or close the source holder shutter to simulate high process w Have actual level ready to enter Setting the cal hi
127. uded as a separate package in the shipment inspect the assembly for damage If damaged file a claim against the carrier and report the damage in detail Any claim on VEGA for shortages errors in shipment or other problems must be made within 30 days of receipt of the shipment xo Ifyou need to return the equipment see page 107 for information concerning returning equipment for repair After you unpack the equipment inspect each source holder in the shipment to ensure that the source holder is locked Note Most source holder models accept a lock Call VEGA Field Service immediately for further instructions if The source holder does accept a lock and there is no lock on it The lock is not secured You cannot secure the lock The operating handle does not properly move into the OFF position See the Radiation Safety for U S General and Specific Licensees Canadian and International Users manual and the Radiation Safety Manual Addendum of Reference Information CD that came with the source holder and the appropriate current regulations for details 2 LFXG D Technical Reference Manual Storing the equipment Storing the source holder Introduction If it is necessary to store the source holder do so in a clean dry area Be sure the source holder shutter is in the OFF or CLOSED position Check the current local regulations U S NRC Agreement State or other to determine if this area must have any restriction
128. uit and bracket mounting 18 LFXG D internal and external ground screw 19 Interconnect 20 Fieldbus software system overview 27 Figure 10 RC exponential filtering 40 Figure 11 Digital filtering 41 Figure 12 Indicated level vs actual level 52 Figure 13 Linearizer data collected at various process levels 53 Figure 14 Count range vs span shown in linearizer table 53 Figure 15 Standard method calibration flow chart 54 Figure 16 Raw counts vs actual level with linearizers 55 Figure 17 Simple method calibration flow chart 56 Figure 18 counts range vs process span 74 Figure 19 Circuit board identifications 96 Figure 20 Power supply board simplified component layout 97 Figure 21 CPU LED indicators 99 Figure 22 Process transducer block 135 Figure 23 Setup transducer block 136 Figure 24 Diagnostics transducer block 137 LFXG D Technical Reference Manual ix Preface Notes x LFXG D Technical Reference Manual Preface Procedures Procedure 1 Procedure 2 Procedure 3 Procedure 4 Procedure 5 Procedure 6 Procedure 7 Procedure 8 Procedure 9 To set the process value 36 To set the calibration parameters 39 To set the filter type primary filter value and fast cutoff 42 To set the source type parameter 43 To set the source function parameters 45 To set the x ray alarm parameters 46 To set the auxiliary input filter and compensation type 48 To set the compensation source and
129. us device or interface when it leaves or returns to a particular state An alarm or an event A function that receives or acknowledges an alert Objects used for reporting of alarms and events A network that carries signals in analog form as a continuously varying range of electrical voltage or current Analog output American Standard Code for Information Interchange continued on next page LFXG D Technical Reference Manual 111 Appendix II Glossary Table 18 Terms and meanings continued Term Meaning Bias device A device that can communicate on the fieldbus but cannot become the LAS BG Basic gain Block A logical software unit that makes up one named copy of a block and the associated parameters its block type specifies The values of the parameters persist from one invocation of the block to the next It can be a resource block transducer block or function block residing within a VFD Block tag A character string name that uniquely identifies a block on a fieldbus Block view objects Bridge C Communication stack Control loop CPU DCS DD Device ID 112 network Variable list objects used to read multiple block parameters at once An interface in a fieldbus network between two different protocols Celsius The hierarchy of layers in a layered communications model that performs the services required to interface the user application to the physical layer of the fieldbus A set of connections betw
130. vrir les circuits avant d enlever le couvercle Un scellement doit tre install moins de 450 mm du bo tier CAUTION Allow a minimum of 10 minutes before opening the GEN2000 for internal inspection This allows time for the gauge to de energize cool and fully discharge the capacitor AC power requirements for the LFXG D are 4 wire hookup 15W of AC AC power source voltage input is 90 254VAC at 50 60 Hz at 15W without heater or 25W with optional heater maximum power consumption AC power must not be shared with transient producing loads Use an individual AC lighting circuit Supply an extra earth ground DC power requirements for the LFXG D are DC power source voltage input is 20 60VDC 24VDC 10 for CE compliance less than 100mV 1 1 000 Hz ripple at 1OVA maximum power consumption Power is polarity independent Supply an extra earth ground DC power allows the use of a single cable Use a 4 wire hookup with two wires for power and two for fieldbus communication The fieldbus gauge uses 0 3W of power from the fieldbus power supply All wiring must have insulation suitable for at least 250V LFXG D Technical Reference Manual 21 Installation Switch for CE compliance For CE compliance install a power line switch no more than one meter from the operator control station Fieldbus signal cable Fieldbus signal that is available on terminal P1 13 is positive and P1 14 is negative The preferred fieldbu
131. y setup e Standardization due alarm e Standardization interval 68 LFXG D Technical Reference Manual Calibration Performing a standardization Standardizing the gauge w Setup the Standardize Type according to the procedure on 38 Procedure 16 To standardize the gauge 1 From Setup TB 508 select DATA_COLLECT_INTERVAL 2 Type the number of seconds that the counts are averaged when calculating the calibration counts Usually this value is 60 seconds or greater 3 Select DATA_COLLECT_EXECUTE and select execute data collect 4 The TIME_REMAINING variable counts down until it reaches zero This variable displays the number of seconds remaining for the data collect 5 From Process TB 449 select AVERAGE_COUNTS and view the value 6 From Setup TB 508 select the STANDARDIZE_COUNTS parameter 7 From Process TB 449 select AVERAGE_COUNTS and type in the value 8 Write the new information to the host system 9 From Process TB 449 select the STANDARDIZE_GAIN parameter and read the value If the value is greater than 1 2 then you may need to perform a new two point calibration LFXG D Technical Reference Manual Calibration Notes 70 LFXG D Technical Reference Manual Chapter 6 Advanced functions Most functions not required for normal operation of the transmitter are found in the menu structure under the Advanced Functions If you are not using the menus interface these options are available through the transducer

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