Vega DSGH Operating Instructions Manual Download Page 81

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DSGH Installation and Operation Guide

Diagnostics and repair

Troubleshooting

Two circuit boards in the density gauge are field-replaceable.

Circuit board identifications

1 Terminal Block
2 RS-485 ground, if applicable
3 CPU board
4 Mounting Bracket
5 Power Supply Board
6 Internal Housing Grounding Screw

Caution:

A minimum of 10 minutes should be allowed after de-

energizing, before opening the Gen2000 for internal inspection to

permit cooling and full capacitor discharge.

Summary of Contents for DSGH

Page 1: ...Operating Instructions DSGH Radiation Based Detector with GEN2000 Electronics for Density Measurement Document ID 31392 Nuclear ...

Page 2: ......

Page 3: ...008 ANSI ASQC Q9001 2008 Approval Certificate No 107563 VEGA Americas Inc 4170 Rosslyn Drive Cincinnati Ohio 45209 1599 USA Tel 1 513 272 0131 Fax 1 513 272 0133 Website www vega com us Field service E mail fieldservice vega com Version Description Date 1 0 Initial release Formerly 245638 EN 051201 1 1 Changed CD part number 32700 Corrected copyright and registered symbols and date 061201 1 2 Elec...

Page 4: ...2 DSGH Installation and Operation Guide NOTES ...

Page 5: ...ector assembly 19 Communicating with the gauge 21 Using a field communicator 21 Using Ohmview 2000 Software on a PC 22 Customer Service 24 U S and Canada 24 Worldwide 24 Have this information ready 24 Installation 25 Testing on the bench 25 Location considerations 27 Vertical pipe with upward flow 27 Pump considerations 27 No line hammering 27 Stable temperature 28 Protect insulation 28 No air ent...

Page 6: ...ata 47 2 Setting the high density and collecting Cal High data 49 3 Calculating the calibration 50 Repeating the calibration 50 Periodic standardization 50 Standardization reminder 51 Standardization on water 51 Standardization on process 52 Standardization on absorber plates 52 Advanced functions 55 Process chain 55 Gauge Information 58 Process Variables tab 58 Gauge Info tab 59 Min Max History t...

Page 7: ...alarms 72 Diagnostic alarm messages 72 Analog alarm 75 Process alarm 75 X ray alarm 75 Auxiliary x ray alarm 77 History information 78 Diag History tab 78 Troubleshooting 79 Circuit board identifications 79 Test points 80 Jumpers 81 LED indicators 82 CPU board LEDs 83 Maintenance and repair 86 Periodic maintenance schedule 86 Source Functions 87 Recording the source wipe and shutter check 87 Field...

Page 8: ...6 DSGH Installation and Operation Guide NOTES ...

Page 9: ...nt or bodily harm 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 Protective ground terminal Identifies loc...

Page 10: ...________________ _______________________________________________________________ _______________________________________________________________ _______________________________________________________________ Was information you needed or would find helpful not in this manual Please specify _______________________________________________________________ ____________________________________________...

Page 11: ...DSGH Installation and Operation Guide 9 Preface Please send your comments to VEGA Americas Inc Director of Engineering 4241 Allendorf Drive Cincinnati OH 45209 1599 USA Fax 1 513 272 0133 ...

Page 12: ...10 DSGH Installation and Operation Guide Preface NOTES ...

Page 13: ...m the U S NRC or other nuclear regulatory 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 to safely operate your gauge See page 1 24 for contact information Note See the Radiation Safety for U S General and Specific Licensees Canad...

Page 14: ...packing the equipment inspect each source holder in the shipment to ensure that the operating handle is in the OFF position If you find the handle in the ON position place it in the OFF position immediately and secure it Note This applies to only some source holders Caution You must be familiar with radiation safety practices in accordance with your U S Agreement State U S NRC or other nuclear reg...

Page 15: ...other to determine whether this area must have any restrictions Gauge Avoid storage at temperatures below freezing Store the gauge indoors in an area that has temperature control between 10 C 35 C 50 F 95 F and 50 relative humidity Store equipment in dry conditions until installation Certifications This gauge is designed for certification compliance from the following agencies ATEX Standard CCOE I...

Page 16: ...14 DSGH Installation and Operation Guide Introduction Safety Information for EX Areas Please note the EX specific safety information for installation and operation in EX areas IECex Label ...

Page 17: ...e Cobalt 60 1 2 and 1 3 MeV gamma radiation emitter 5 3 year half life Power Requireme nts AC 100 230 10 VAC 90 250 VAC or with internal heater kit 115 230 VAC at 50 60 Hz at 15 VA maximum power consumption 25 VA with heater CE compliance requires 100 230 10 VAC DC 20 60 VDC 100 mV 1 1 000 Hz ripple at 15 VA CE compliance requires 24 VDC 10 Wiring Per local code Signal Cable Maximum length 1 000 m...

Page 18: ...ps A B C and D Div 1 and 2 Class ll Groups E F and G Div 1 and 2 ATEX Certification II 2 G Ex d IIC T6 Gb II 2 G Ex d IIB H2 T6 Gb II 2 D Ex tb IP66 T60 C Db Enclosure rating NEMA 4X IP 66 Ambient temperature 20 C 60 C 4 F 140 F option for lower temperatures available Humidity 0 95 non condensing Vibration Tested to IEC 68 2 6 IEC 68 2 27 and IEC 68 2 36 Material Cast aluminum ASTM A 357 Paint Pol...

Page 19: ...c alarm or process high low alarm function Rating 6 A at 240 VAC or 6 A 24 VDC SPDT Form C or 1 4 HP at 120 VAC HART Communic ation HART Protocol BEL202 FSK standard current loop output PC interface HART modem and VEGA communications software Optional hand held interface Emerson Field Communicator model 375 with VEGA device descriptions loaded Auxiliary Input Capability Type Frequency input 0 100 ...

Page 20: ...n and vice versa Calibrating the gauge associates the detector readings or counts with the density of the material in engineering units The output range of the gauge is a 4 mA 20 mA current loop signal in proportion to the density of the process System overview The gauge uses VEGA s GEN2000 VEGA s newest compact electronics that support 4 mA 20 mA HART protocol frequency or fieldbus output The den...

Page 21: ...ation in a narrow collimated beam through the process vessel Shields the radiation elsewhere The model chosen for each system depends on the source capsule inside and the radiation specifications Its shutter completely shields the radiation source off or lets it pass through the process source on if applicable Detector assembly Mounts opposite the source holder ...

Page 22: ...tillator s light and converts it into voltage pulses The microprocessor receives these voltage pulses after amplification and conditioning by the photomultiplier tube The microprocessor and associated electronics convert the pulses into an output that can be calibrated 1 Terminal Block 2 RS 485 ground if applicable 3 CPU board 4 Mounting Bracket 5 Power Supply Board 6 Internal Housing Grounding Sc...

Page 23: ... setup and calibration of the gauge there are no everyday requirements for external electronics Using a field communicator VEGA s gauge is compatible with the Emerson 375 Field Communicator or equivalent To function the minimum load resistance on the 4 mA 20 mA loop must be 250 See the instruction manual for your field communicator for information about Key usage Data entry Equipment interface To ...

Page 24: ...08 which includes Modem Cables Software Ohmview 2000 RS 485 Network Ohmview 2000 Logger and Ohmview 2000 Configurator software are Windows programs that emulate the Field Communicator Model 375 Ohmview 2000 Charts the 4 mA 20 mA current output graphically Stores and retrieves configuration data to disk Enables offline editing of configurations Note There are some minor differences in operation of ...

Page 25: ...erver Launcher program Ohmview 2000 Logger Ohmview 2000 File Configurator Ohmview 2000 Electronic User Manual When you insert the CD the program installs these programs onto your hard drive Example of Ohmview 2000 Software Note The HART Communication Server must always be on when using Ohmview 2000 s main program and Ohmview 2000 Logger ...

Page 26: ...ause of VEGA equipment you can reach us 24 hours a day Worldwide Contact your local VEGA representative for parts service and repairs Have this information ready VEGA Customer Order C O Number Located on the source holder s engraved label Sensor s serial number Located on the gauge s housing inside the external housing Table 1 2 Contact information Tel Monday Friday 8 00 A M 5 00 P M EST 1 513 272...

Page 27: ...n the bench To ensure a quick start up after installation you can test the detector assembly with the HART compatible communication device a field communicator or a PC with a HART modem and VEGA software Bench testing lets you check Power Communication Initial setup software parameters Some diagnostics ...

Page 28: ...minals 13 and 14 250 800 load resistor optional Mini clips HART modem RS 232 cable PC running VEGA software Transmitter test points H1 H2 Bench test setup Note You may need to reset the time and date if the gauge has not had power for 28 days The Real Time Clock Fail message may appear You must enter the correct time and date The clock is the basis for source decay calculations ...

Page 29: ...arly true in sludge applications Pump considerations Mounting the density gauge near a pump can be good or bad depending on the application Check with VEGA application engineers for a recommendation on your application No line hammering The design of the density gauge requires operation in low vibration conditions Install it in a location with no line hammering or excessive vibration Quickly chang...

Page 30: ...is between the measuring assembly and the process protect the insulation from liquids The absorption of a liquid such as water can affect the gauge indication because it blocks some radiation No air entrainment Mount the gauge on a portion of the line where there is no possibility of air or gas entrainment and where the pipe is always full of process material Air or gas entrainment in the process ...

Page 31: ...g away from each other Mounting the measuring assembly You can mount the density gauge on the pipe by positioning the detector housing and source holder brackets with the bolts that VEGA provides If the pipe has insulation the density gauge and source holder should have external support to prevent crushing of the insulation Note In some cases the handle on the source holder operates a rotating shu...

Page 32: ...30 DSGH Installation and Operation Guide Installation Mounting the DSGH gauge ...

Page 33: ... Housing with Red Threaded Plugs Modified NPT National Standard Pipe Taper openings suitable for A B C and D locations shall be provided The acceptable conduit opening must provide for a 4 full threads of engagement with a minimum thread conduit or fitting Torque valves as a function of conduit trade size shall be in accordance with the torques listed in Table 2 2 Note During installation check th...

Page 34: ...1 2 83 113 Millimeters lb ft N m M16 M20 23 9 32 5 Part Number Description Material Plugs 221710 3 4 NPT Pipe Plug Galvanized 221716 3 4 NPT Pipe Plug SQ HD 316SS EEXD Approved 2 36361 1 2 NPT Pipe Plug Aluminum 2 44134 3 4 NPT Pipe Plug 316SS 246681 M20 x 1 5 Stop Pipe Plug Brass Adapters EEXD Approved 248000 3 4 NPT to 1 2 NPT Brass unplated 247184 3 4 NPT to M20 x 1 5 Brass unplated 2 41660 3 4...

Page 35: ...wer 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 1 Terminal Block 2 RS 485 ground if applicable 3 CPU board 4 Mounting Bracket 5 Power Supply Board 6 Internal Housing Grounding Screw 1 2 3 4 5 6 GEN2000 ...

Page 36: ...er Earth Ground and Ground to Housing DSG Perforated View Relay normally open common normally closed L1 AC or DC power input L2 RY NO RY C RY NC Not used in HART applications Auxiliary input power Common Auxiliary input frequency signal Current loop output Interconnecting terminals GEN2000 with ...

Page 37: ...ire suitable for 40 C above surrounding ambient temperature All field wiring must have insulation suitable for 250 volts or higher Switch for CE compliance For CE compliance install a power line switch 1 m from the operator s control station Output current loop Output signal is 4 mA 20 mA into 250 800 Pin 13 is and Pin 14 is HART communication protocol BEL202 FSK standard is available on these con...

Page 38: ...code When using DC power the signal and power can run on a single cable 4 wire hookup 2 wires for power 2 for 4 mA 20 mA Relay Use relay contacts rated at 6 A at 240 VAC 6 A at 24 VDC or 1 4 HP at 120 VAC Frequency input signal is 0 100 kHz true digital RS 485 The maximum cable length is 609 meters 2 000 Use shielded wire per local code Connect positive terminals together Connect negative terminal...

Page 39: ... 6 7 8 9 10 11 12 13 14 Power in L Power in N Relay C Relay NC Aux Aux 4 20 4 20 Relay NO Relay Auxiliary Frequency Input PC Modem Optional mA Input DCS Hand held terminal Optional Output signal cable Housing ground CENELEC ground Power Earth ground Power cable per local codes Example GEN2000 density gauge wiring ...

Page 40: ...density is out of the alarm condition Conduit Conduit runs must be continuous and you must provide protection to prevent conduit moisture condensation from dripping into any housings or junction boxes Use sealant in the conduit or arrange the runs so they are below the entries to the housings and use weep holes where permitted You must use a conduit seal off near the housing when located in a haza...

Page 41: ...in the wiring from the field transmitter analog output to the distributed control system DCS programmable logic controller PLC chart recorder Ensure that the AC power to the transmitter is a regulated transient free power source UPS type power is the best If using DC power verify that the ripple is 100 mV 1 1 000 Hz at 15 W Have process ready for calibration Note Users outside the U S must comply ...

Page 42: ...h end of the measurement span A density change of at minimum of 0 1 SpG is a common requirement When possible have the material used for periodic standardization of the gauge available usually water Do not remove the lock or shield on the source holder Notify VEGA Field Service if there is damage to the source holder ...

Page 43: ... process You must make 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 critical process and equipment conditions remain unchanged The gauge requires only a periodic standardization to compensate for changing conditions Current lo...

Page 44: ...ation Connect an ammeter or the DCS to Terminal connections 13 mA and 14 mA Test points H1 and H2 Anywhere along the current loop Make sure there is a 250 800 load on the current loop If no load or an insufficient load exists on the loop it may require temporary Note The current loop and process spans are independent and set separately The current loop span sets the density indications for the 4 m...

Page 45: ...nt loop 1 Select Calibration Current Loop Cal 2 Click Execute 3 Click OK 4 Read the ammeter enter the actual milliamp reading 5 Click OK 6 Click YES if the ammeter reads 4 00 mA or NO for any other reading 7 Repeat until the meter reads 4 00 mA The meter approaches the 4 00 mA successively 8 Read the ammeter enter the actual milliamp reading Note If using a voltmeter calculate the current value ...

Page 46: ...pect to the change in density of process material The majority of density applications use the equation linearizer method to perform the one point calibration method For density applications the equation is the default and we recommend it in most circumstances If the results from the equation linearizer method are not satisfactory contact VEGA Field service to further explain the other options The...

Page 47: ...DSGH Installation and Operation Guide 45 Calibration The equation linearizer is appropriate for a one or two point calibration ...

Page 48: ...tability of the sensor perform a data collection 3 4 times on the same sample If the sensor counts vary widely you should increase the Data collection interval parameter Perform a data collection to enable simple measurement of the process without altering the calibration or standardization values It lets the system measure the process and report the number of sensor counts 1 Select Setup Gauge Se...

Page 49: ...tting the low density and collecting Cal Low data You must 1 Use the gauge to measure the low process density 2 Enter the actual density This sets the low end sometimes called 0 of the calibration curve Perform this procedure before or after setting the high density 1 Select Calibrations Data Collect 2 Click Execute 3 Set the process to a known point 4 Click Start After the data collection the num...

Page 50: ... or pipe with low process Prepare to draw a sample while the gauge is collecting data Procedure 3 4 To set the cal low density Note Perform the data collection for the low and high density within 10 days of each other for a good calibration The low and high values must be more than 10 of the process span apart for the most accurate calibration Increasing the process span usually increases the gaug...

Page 51: ...sel inner diameter engineering units measurement span and source type are correct Power up gauge one hour before start of calibration Fill vessel or pipe with high process or close the source holder shutter to simulate high process Prepare to draw a sample while the gauge is collecting data Procedure 3 5 To set the cal high density 3 Click Accept 4 Enter the actual value in engineering units 5 Cli...

Page 52: ...ing a new radiation source holder Moving the gauge to another location Changes to pipe size schedule or any other change in process piping Excessive buildup or erosion of pipe that standardization cannot compensate for check standardize gain Standardize gain 1 2 after a standardization indicating it made a 20 adjustment from the previous calibration Periodic standardization Standardization adjusts...

Page 53: ...ndardization on water Standardization on water is the best choice if water is readily obtainable For example if the process is water based or if the process is slurry with water as the carrier Advantages If the source of water is of consistent purity for example city vs pond standardization on water is highly accurate Water is a good choice if the density of the process is around 1 0SpG because st...

Page 54: ...ion it requires a laboratory for results Standardization on absorber plates Absorber plates have the following features Usually made of lead Insert into slots in front of the gauge Require a mounting kit from VEGA Require the use of the same plates to ensure a consistent absorption of radiation this is a substitute for the radiation absorption of the material in the pipe Requires emptying process ...

Page 55: ...ial process calibration You must determine the equivalent value of the absorber plates after the initial process calibration of the density gauge when the gauge was mounted to the pipe 1 Select Calibration Standardize 2 Click Execute 3 Click OK 4 Enter the reading 5 Click Start 6 Click Accept 7 Enter the process value 8 Click OK 9 Click OK ...

Page 56: ...54 DSGH Installation and Operation Guide Calibration NOTES ...

Page 57: ...se functions are primarily for use by VEGA personnel for advanced troubleshooting and repair Process chain The process chain is a description of the gauge software s calculation of a density measurement from a radiation reading In the Process Chain tab you can view intermediate values of the calculation to verify proper functionality of the software Note VEGA strongly recommends that you ask our a...

Page 58: ...Temp Comp Counts The temperature compensated counts that are sensor counts with application of temperature compensation Raw Counts Temperature compensated counts with application of uniformity gain Adjusted Counts Sum counts that are raw counts plus auxiliary raw counts In most applications this does not use auxiliary input so sum counts raw counts Source Decay Counts Sum counts with application o...

Page 59: ... the Setup tab A graph of percent count range vs percent process span indicates the non linearity of the radiation transmission s measurement If using a table linearizer the values in the table are percent count range and percent process span Unfiltered PV The density in inches without the time constant or rectangular window filter Uncompensated PV The density of process before any process compens...

Page 60: ...w The temperature and sensor uniformity gain compensated counts from the sensor at the Cal low density Determining the Cal low density occurs during the calibration Counts High The temperature and sensor uniformity gain compensated counts from the sensor at the Cal high density Determining the Cal high density occurs during the calibration Sensor Temp Comp Gain The current value of the temperature...

Page 61: ...z Gain The current value of the standardize gain that adjusts with each standardize procedure HV Setting The set point for the sensor high voltage Table 4 2 Process Variables tab display values Value Description Scintillator sensor voltage Firmware s version on the FLASH Hardware s version number GEN2000 CPU board s serial number GEN2000 unit s serial number Sensor Coefficients T0 T3 Value Descrip...

Page 62: ...e last min max reset Table 4 4 Min Max History tab display values You can reset these values so they record from the time of the reset 1 Select Gauge Info Gauge Info 2 The Gauge Info tab appears Value Description Sensor counts The raw uncompensated counts from the detector Aux in min max The auxiliary input counts if used Sensor Temperature The internal temperature of the scintillator sensor in th...

Page 63: ...EPROMs at power up to ensure accurate backups If you install a new CPU board the EEPROM performs a backup of information on the CPU The sensor boards memory does not match the CPU board memory The software signals the discrepancy with an error message The gauge does not perform a backup in case the discrepancy is due to EEPROM corruption rather than new hardware 1 Select Gauge Info Min Max History...

Page 64: ... you must verify installation in Ohmview 2000 to enable new backups of the EEPROMs Procedure 4 3 To verify the New Hardware Found message When new hardware is not installed If the error message New hardware found appears an EEPROM is probably corrupt The messages CPU EEPROM Corrupt or Sensor EEPROM Corrupt may also appear in the history 1 Select Diagnostics New hardware New CPU or New Sensor 2 Cli...

Page 65: ...exit Test tab Current Loop Test milliamp output This mode manually forces the current output to a specified value This is useful for verifying the current loop calibration To calibrate the current loop see Chapter 3 Calibration Caution If you suspect an EEPROM is corrupt please call VEGA Field Service for advice before performing the following procedure 1 Select Diagnostics New Hardware No New Har...

Page 66: ...electronics and software response to input counts without having to Change the process Shield the source Vary the radiation field While in this mode after entering a number of counts it may be useful to look at the Process Chain tab to view the variables affected by the raw counts value Procedure 4 6 To perform a sensor test 1 Select Diagnostics Test Current Loop Test 2 Click Enter 3 Remove the ga...

Page 67: ... be useful to look at the Process Chain tab to view the variables affected by the auxiliary input counts value Procedure 4 7 To perform an auxiliary input test 3 Remove the gauge from control Enter the value of the new counts to force 4 Click OK The transmitter functions in this mode until it times out 1 hour or you click Exit and OK 1 Select Diagnostics Test Auxiliary Input Test 2 Click Enter 3 R...

Page 68: ... On or Off to test the contacts This is useful for verifying whether alarm annunciators are functioning Procedure 4 8 To perform a relay test 1 Select Diagnostics Test Relay Test 2 Select Energize relay or De energize relay 3 The transmitter functions in this mode until it times out 1 hour or you click Exit ...

Page 69: ...he scintillator sensor temperature compensation Procedure 4 9 To perform a temperature test Selecting the transmitter s type and location Gauge Setup tab 1 Select Diagnostics Test Temperature Test 2 Click Enter 3 Remove the gauge from control Enter the value of the new temperature to force 4 Click OK 5 The transmitter functions in this mode until it times out 1 hour or you click Exit and OK ...

Page 70: ...e local transmitter 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 Procedure 4 11 To select the transmitter s location 1 Select Setup Gauge Setup Gauge...

Page 71: ...e 5 1 Alarm types Name Description Diagnostic alarm Provides information about the density gauge system and alerts users when periodic procedures are due Analog alarm Sets the current loop mA output to 2 mA or 22 mA when the detector outputs 0 counts Process alarm The process alarm lets the relay output trip when the process density is above high limit or below low limit a setpoint X ray alarm Dis...

Page 72: ...agnostic alarms and HART messages Diagnostic conditions that are currently in alarm alert users by Table 5 2 Alarm type outputs Diagnostic Analog Process X ray Option to trigger relay X X X Display HART message Optional Current loop output affected X X Gaugestatus and gauge history X ...

Page 73: ...stic Alarm Enable Relay output if it is set as a diagnostic alarm relay in Alarms Relay Setup Relay Functions Relay Setup Gauge status diagnostics screens To check the system s present status select Diagnostics Diagnostics tab For historical information select the Diagnostic History and STDZ History tabs Some conditions are self repairing example RAM and EEPROM corruption Therefore these may appea...

Page 74: ...reen Note If the relay is set as a diagnostic alarm you must acknowledge all diagnostic alarms to reset the relay Table 5 3 Diagnostic alarm conditions Diagnostic check and Normal Error conditions HART message Diagnostic description Action RAM Status Pass Fail RAM corrupt RAM memory corruption occurred and was resolved internally Repeated triggering of this alarm suggests a hardware problem Consul...

Page 75: ... wipe due Acknowledge the alarm by logging a shutter check in the Source Functions tab See page 5 87 CPU EEPROM Pass Fail CPU EEPROM corrupt A critical memory corruption occurred on the CPU board EEPROM that may not be resolved internally To check for recurrence acknowledge the alarm Cycle power to the unit If the alarm recurs there is a hardware problem Perform the procedure to repair the corrupt...

Page 76: ...ware found No Yes New hardware found The CPU board detects a configuration mismatch The CPU board or sensor assembly may have been replaced or one of the EEPROM configurations is erroneous See page 4 63 Process out of range No Yes Process out of measurement range The current process value is not within the limits set by the Max density and Min density in the gauge span settings Call VEGA Field Ser...

Page 77: ...s above high limit or below low limit a setpoint Enter the choice of low or high limit and the setpoint on the Alarm Relay Setup tab This alarm works only with the output relay HART messages gauge status diagnostics and history information are not saved for this alarm The gauge acknowledges or resets the process alarm when the process value returns to the setpoint value Depending on your usage of ...

Page 78: ...inutes 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 configured so the counts increase but do not exceed the Cal Low counts the x ray alarm does not trigger and the gauge reads the x ray interference as a true process shift Note Excessive radiation fields at the detector can...

Page 79: ...or The second detector only monitors x ray interference and has a frequency output that wires to the auxiliary input of the primary detector The primary detector s programming triggers the x ray alarm when the counts of the secondary detector are above a threshold Call VEGA for more information output 10s before x ray current loop output mA Dither level Dither time Cycle period time ms X ray inter...

Page 80: ... Diag History tab The Diagnostics Diag History tab displays information about critical events Use this information to determine whether a problem recently occurred and was internally repaired example EEPROM corruption You can view the newest and oldest trigger records for these events ...

Page 81: ...Circuit board identifications 1 Terminal Block 2 RS 485 ground if applicable 3 CPU board 4 Mounting Bracket 5 Power Supply Board 6 Internal Housing Grounding Screw Caution A minimum of 10 minutes should be allowed after de energizing before opening the Gen2000 for internal inspection to permit cooling and full capacitor discharge 1 2 3 4 5 6 ...

Page 82: ...d Operation Guide Diagnostics and repair Test points Located on the power supply and CPU board Power Supply and CPU Boards Table 5 4 Power supply board test point labels Label Description H1 HART connection H2 HART connection ...

Page 83: ...isolated ground Table 5 5 CPU test point labels Label Description Count Raw input signal coming from the preamplifier GND Logic ground U5 pin 8 5 V power supply test points Referenced to logic ground Table 5 4 Power supply board test point labels Label Description Note Do not change the jumpers from the current setting without calling VEGA Field Service Table 5 6 Jumper settings Mode Gauge current...

Page 84: ...ioning Verify 6 V on test points Check fuse on power supply board Check power input terminals 1 2 24 V Analog output loop voltage ON OFF 24 V not present on 4 mA 20 mA output 4 mA 20 mA output and HART communications are bad Check loop wiring and jumpers JP1 JP2 on power supply board Replace power supply board Relay Relay condition indicator ON relay is energized OFF relay is de energized None Che...

Page 85: ...f the gauge They are visible when you remove the explosion proof housing pipe cap FI ELD M EM H A RT CPU A U X H V FI ELD H V A U X CPU H A RT M EM On Blinking Off Normal LED pattern Memory corrupt pattern Note If the LED band displays this pattern call VEGA Field Service to report this condition The gauge does not operate if the FLASH chip is corrupt ...

Page 86: ... software diagnostics Call VEGA Field Service HART HART communica tion indicator ON blinks when receiving HART messages None Check HART device connection on loop and HART device functioning CPU Central processing unit on CPU board Blinks at rate of 1 time per second LED does not blink CPU not functioning Check power input Replace CPU board Aux Auxiliary input frequency signal indicator Blinks if a...

Page 87: ...ld Service Field Radiation field indicator Cycles in proportion to radiation field intensity at detector ON for 10 seconds for each mR hr then off for 2 seconds Can use LED 5 that blinks 1 time sec to time LED1 for field indicator None Check for closed source shutter buildup and insulation Table 5 8 CPU board LED summary LED Description Normal condition Error condition Recommendation ...

Page 88: ...ule Description Frequency Procedure Standardize As required by process conditions usually at least once a month Calibration chapter Source holder shutter check Every 6 months unless otherwise required by the appropriate nuclear regulatory body Radiation safety instructions shipped separately with source holder and following instructions Source wipe Every 3 years unless otherwise required by the ap...

Page 89: ...re to acknowledge the alarm and reset the timer Perform this procedure after a source wipe or a shutter check Procedure 5 1 To record a source wipe or shutter check 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 curr...

Page 90: ...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 flowcharts or call VEGA Field Service to be sure a replacement is necessary The sensor EEPROM contains a backup of the CPU board EEPROM After replacing the CPU board you must perform a memory backup to update the CPU board s EEPROM with t...

Page 91: ...ibbon cables 9 Install the electronics package in the housing 10 Replace the three 3 mounting nuts 11 Reconnect the terminal wiring connector 12 Install the plastic electronics cover 13 Install the housing cover 14 Turn on the power to the unit 15 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 appe...

Page 92: ...131 for parts service and repairs Returning equipment for repair to VEGA Have this information ready 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 Replace Power Supply or CPU Board Mounting Nuts ...

Page 93: ...orization MRA number 3 Indicate the MRA on the repair service purchase order 4 Clearly mark the shipping package with the MRA number 5 Send the confirming purchase order and the equipment to VEGA s Repair Department in U S or your local representative outside the U S See page 1 24 for contact information Note You must first contact VEGA and receive a material return authorization number MRA before...

Page 94: ...92 DSGH Installation and Operation Guide Diagnostics and repair NOTES ...

Page 95: ... EEPROM status diagnostics check 73 CPU serial number 59 CPU test point 81 cross talk 29 current loop calibrating on the bench 25 26 calibration 41 output fixed at 2mA or 22mA 75 output test mode 63 power source or sink mode 81 Customer Order C O Number 24 required for repairs 90 D Data collection interval using data collect on sample to check interval 46 DCS 39 device description 21 Diagnostic al...

Page 96: ... message responses to 62 O Ohmart Customer Service 24 Field Service 24 Ohmart Field Service 90 Ohmart View software 22 differences with communicator 22 Ohmart VEGA Parts and repairs 88 Ohmart VEGA Field Service 24 Ohmview 2000 software kit 22 P Periodic maintenance 86 Periodic process standardization 50 PLC 39 Power supply board test 80 Process alarm 69 process alarm 75 override switch 75 Process ...

Page 97: ...49 shutter check frequency 86 recording when complete 87 Shutter check due alarm acknowledge 74 diagnostics check 74 Source Decay Gain 59 source wipe 87 frequency 86 recording when complete 87 Source wipe due alarm acknowledge 73 source wipe due diagnostics check 73 spare parts 88 specifications DSGH 15 Standardization considerations 28 standardization due alarm 51 Standardization on absorber plat...

Page 98: ...96 DSGH Installation and Operation Guide NOTES ...

Page 99: ......

Page 100: ...ga com www vega americas com 31392 US 150921 Subject to change without prior notice 2015 VEGA Americas Inc Cincinnati Ohio USA All statements concerning scope of delivery application practical use and operating conditions of the sensors and processing systems correspond to the information available at the time of printing ...

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