Vega DSGH Operating Instructions Manual
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Vega DSGH Operating Instructions Manual

Radiation-based detector with gen2000 electronics for density measurement
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Operating Instructions
DSGH
®
Radiation-Based Detector with GEN2000
Electronics for Density Measurement
®
Document ID:
31392
Nuclear

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Summary of Contents for Vega DSGH

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

  • Page 3: Revision History

    Copyright 2015 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.
  • Page 4 NOTES DSGH Installation and Operation Guide...

  • Page 5: Table Of Contents

    Safety Information for EX Areas ........14 DSGH specifications ......15 Typical applications .
  • Page 6 Auxiliary Input Test ..........65 DSGH Installation and Operation Guide...
  • Page 7 Requesting field service ......90 Returning equipment for repair to VEGA ....90...
  • Page 8 NOTES DSGH Installation and Operation Guide...

  • Page 9: Preface

    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 location of terminal intended for connection to an external conductor. DSGH Installation and Operation Guide...

  • Page 10: Your Comments

    Preface Your comments Manual: DSGH Installation and Operation Guide Date: ______________ Customer Order Number: ___________________ Your contact information (optional): Name: ___________________________________________ Title: ____________________________________________ Company: ____________________________________________ Address: ____________________________________________ ____________________________________________ ____________________________________________ ____________________________________________ Did you find errors in this manual? If so, specify the error and page number.
  • Page 11 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 DSGH Installation and Operation Guide...
  • Page 12 Preface NOTES DSGH Installation and Operation Guide...

  • Page 13: Introduction

    • 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...

  • Page 14: Unpacking The Equipment

    If there was damage to the unit during shipment, file a claim against the  carrier, reporting the damage in detail. Any claims against VEGA for shortages, errors in shipment, etc., must be made within 30 days of receipt of the shipment.

  • Page 15: Storing The Equipment

    Certifications This gauge is designed for certification compliance from the following agencies” • ATEX Standard • CCOE (India) • CEPEL/INMETRO (Brazil) • CSA • FM Standard • IECex • JIS (Japan) • NEPSI (China) DSGH Installation and Operation Guide...

  • Page 16: Safety Information For Ex Areas

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

  • Page 17: Dsgh Specifications

    20 – 60 VDC (< 100 mV, 1 ... 1,000 Hz ripple) at 15 VA CE compliance requires 24 VDC ± 10% Wiring Per local code Signal Maximum 1,000 m (3,280 Cable length HART signal 1.02 – 0.643 mm (no. 18 or 20 AWG) 2-conductor shielded DSGH Installation and Operation Guide...
  • Page 18 -20 °C ...+60 °C (-4 °F ...+140 °F) option for lower temperature temperatures available Humidity 0 – 95%, non-condensing Vibration Tested to IEC 68-2-6, IEC 68-2-27, and IEC 68-2- Material Cast aluminum ASTM A 357 Paint Polyester Powder Coating DSGH Installation and Operation Guide...

  • Page 19: Typical Applications

    • Density of liquids or slurries through a pipe or vessel wall without contact to the material • Percent of solids in a carrier • Interface between liquids flowing in a pipe, when the liquids differ in density DSGH Installation and Operation Guide...

  • Page 20: Principle Of Operation

    4 mA ... 20 mA HART protocol, frequency, or fieldbus output. The density measurement system includes: • Source holder • Detector assembly • Communication device (HART modem with PC and VEGA software or Emerson Field Communicator 375) DSGH Installation and Operation Guide...

  • Page 21: Source Holder

    • 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. DSGH Installation and Operation Guide...
  • Page 22 • The microprocessor and associated electronics convert the pulses into an output that can be calibrated. GEN2000 1 Terminal Block 2 RS-485 ground, if applicable 3 CPU board 4 Mounting Bracket 5 Power Supply Board 6 Internal Housing Grounding Screw DSGH Installation and Operation Guide...

  • Page 23: Communicating With The Gauge

    After 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 .

  • Page 24: Using Ohmview 2000 Software On A Pc

    When you use a PC with MS Windows and a Pentium processor to communicate with the gauge or other VEGA HART transmitter field devices, you must have a HART modem and the Ohmview 2000 software kit (part number 243008), which includes: •...
  • Page 25 • Ohmview 2000 Electronic User Manual When you insert the CD, the program installs these programs onto your hard drive. Note: The HART Communication Server must always be on when using Ohmview 2000's main program and Ohmview 2000 Logger. DSGH Installation and Operation Guide...

  • Page 26: Customer Service

    Field service engineers also provide assistance by phone during office hours. For emergencies (example: line shut down because of VEGA equipment), you can reach us 24 hours a day. Contact information Table 1.2...

  • Page 27: Installation

    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 •...
  • Page 28 You must enter the correct time and date. The clock is the basis for source decay calculations. You can calibrate the current loop output on the bench before mounting the detector on the process. See page 3-43. DSGH Installation and Operation Guide...

  • Page 29: Location Considerations

    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.

  • Page 30: Stable Temperature

    Installation necessary, you can physically mount the density gauge apart from the vessel or pipe, but notify VEGA at the time of the order to ensure proper source size and shielding. Stable temperature Mount the gauge on a portion of the line where the temperature of the process material is relatively stable.

  • Page 31: Avoid Source Cross-Talk

    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.
  • Page 32 Installation Mounting the DSGH gauge DSGH Installation and Operation Guide...

  • Page 33: Wiring The Equipment

    4 ½ 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. DSGH Installation and Operation Guide...

  • Page 34: Wiring

    NPT to M20 x 1.5 316SS Wiring Note: If you 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.
  • Page 35 Installation 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.
  • Page 36 RY NO - normally open RY C - common RY NC - normally closed Not used in HART applications Auxiliary input power Common Auxiliary input frequency signal Current loop output Interconnecting terminals — GEN2000 with DSGH Installation and Operation Guide...

  • Page 37: Power

    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 connections. The output is isolated to standard ISA 50.1 Type 4 Class U. DSGH Installation and Operation Guide...

  • Page 38: Relay

    Installation When using signal (current loop or 4 mA ... 20 mA output) cables that VEGA did not supply, they must meet these specifications: • Maximum cable length is 1,000 m (3,280') • All wires should be per local code...
  • Page 39 Installation Example GEN2000 density gauge wiring DSGH Installation and Operation Guide...

  • Page 40: Communication

    Depending on the source holder’s type, the process of commissioning the gauge can include: • Taking appropriate radiation field tests • Checking the pre-programmed setup parameters • Calibrating on process • Verifying the working of the gauge DSGH Installation and Operation Guide...

  • Page 41: Field Service Commissioning Call Checklist

    To reduce service time and costs, use this checklist to ensure the gauge is ready for commission before the engineer arrives: Mount the source holder and detector per the VEGA certified drawings.  Allow access for future maintenance.
  • Page 42 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: Calibration

    Calibrating the current loop adjusts the 4 mA ... 20 mA output to a reference, the PLC/DCS or a certified ammeter. It forces the 4 mA and 20 mA outputs to the external reference. The VEGA factory pre-adjusts the current loop with a certified ammeter, so it is very close to the outputs required.

  • Page 44: Measuring The Current Loop Output

    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 DSGH Installation and Operation Guide...
  • Page 45 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. DSGH Installation and Operation Guide...

  • Page 46: Choosing The Linearizer Type

    If the results from the equation linearizer method are not satisfactory, contact VEGA Field service to further explain the other options. The linearizer equation calculates a density reading for a given count reading at the detector.
  • Page 47 Calibration The equation linearizer is appropriate for a one or two-point calibration. DSGH Installation and Operation Guide...

  • Page 48: Checking The Gauge Repeatability

    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. DSGH Installation and Operation Guide...

  • Page 49: Calibration

    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. DSGH Installation and Operation Guide...
  • Page 50  Prepare to draw a sample while the gauge is collecting data.  Procedure 3.4: To set the cal low density 1. Select Calibration | 2 Point Calibration | Cal Low Collect. 2. Click Start. DSGH Installation and Operation Guide...

  • Page 51: Setting The High Density And Collecting Cal High Data

    Procedure 3.5: To set the cal high density 1. Select Calibration | 2 Point Calibration | Cal High Collect. 2. Select Start. 3. Click Accept. 4. Enter the actual density process value (from the laboratory) in engineering units. 5. Click OK. DSGH Installation and Operation Guide...

  • Page 52: Calculating The Calibration

    Typically, the system requires only periodic standardization to compensate for drifts over time. However, these events require you to repeat the calibration: • Measurement of a new process application (contact VEGA for recommendation) • Process requires a new measurement span •...

  • Page 53: Standardization Reminder

    This ensures high accuracy at the point on the calibration curve. Disadvantages: You must be able to empty and fill the process pipe with a consistent source of water. DSGH Installation and Operation Guide...

  • Page 54: Standardization On Process

    • 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.
  • Page 55 Procedure 3.7: To standardize the gauge 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. DSGH Installation and Operation Guide...
  • Page 56 Calibration NOTES DSGH Installation and Operation Guide...

  • Page 57: Advanced Functions

    Functions not required for normal operation of the gauge are in the Ohmview2000 software under the Diagnostics and Gauge Info tabs. These functions are primarily for use by VEGA personnel for advanced troubleshooting and repair. Note: VEGA strongly recommends that you ask our advice before using any advanced function.
  • Page 58 In most applications, this does not use auxiliary input, so sum counts = raw counts. Source Decay Counts Sum counts with application of source decay gain. Standardize Counts Displays standardize counts that are source decay counts with application of standardization gain. DSGH Installation and Operation Guide...
  • Page 59 Aux Counts The frequency-input counts from optional auxiliary input. Filtered Aux Counts The filtered auxiliary counts. Enter the filter dampening value for the auxiliary input’s filter time-constant. DSGH Installation and Operation Guide...

  • Page 60: Gauge Information

    Cal high density. Determining the Cal high density occurs during the calibration. Sensor Temp Comp The current value of the temperature compensation gain. Gain Use this to adjust for inherent sensor output change with temperature. DSGH Installation and Operation Guide...

  • Page 61: Gauge Info Tab

    Value Description Sensor The algorithm that compensates for variations in measurement Coefficients output with changes in temperature uses temperature coefficients. The factory determines the coefficients through rigorous testing. You cannot change them through normal operation. DSGH Installation and Operation Guide...

  • Page 62: Min/Max History Tab

    Sensor The internal temperature of the scintillator sensor in the gauge Temperature Last reset The date of the last min/max reset You can reset these values so they record from the time of the reset. DSGH Installation and Operation Guide...

  • Page 63: New Hardware Or Corrupt Eeprom

    EEPROM corruption rather than new hardware. Note: Only use the New hardware functions if you replace the CPU or sensor assembly. These functions are unnecessary if installing a new detector assembly, which includes the CPU board and the sensor assembly. DSGH Installation and Operation Guide...

  • Page 64: New Hardware Tab

    2. Click OK. 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. DSGH Installation and Operation Guide...

  • Page 65: Test Modes

    Advanced functions Usually, you can repair the corruption using the EEPROM backup. Caution: If you suspect an EEPROM is corrupt, please call VEGA Field Service for advice before performing the following procedure. Procedure 4.4: To repair the corruption using the EEPROM backup 1.

  • Page 66: Sensor Test

    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 | Sensor Test. 2. Click Enter. DSGH Installation and Operation Guide...

  • Page 67: Auxiliary Input Test

    1. Select Diagnostics | Test | Auxiliary Input Test. 2. Click Enter. 3. Remove the gauge from control. Enter the auxiliary counts. 4. Click OK. The transmitter functions in this mode until it times out (1 hour), or you click Exit and OK. DSGH Installation and Operation Guide...

  • Page 68: 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. DSGH Installation and Operation Guide...

  • Page 69: Temperature Test

    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. Selecting the transmitter’s type and location Gauge Setup tab DSGH Installation and Operation Guide...

  • Page 70: Type

    Procedure 4.11: To select the transmitter’s location 1. Select Setup | Gauge Setup | Transmitter Location. 2. Select Local or Remote. DSGH Installation and Operation Guide...

  • Page 71: Diagnostics And Repair

    (high limit) or below (low limit) a setpoint. X-ray alarm Distinctly changes the current loop mA output in response to a marked increase in the radiation field. This prevents control problems when external radiographic sources are in the area for vessel inspections. DSGH Installation and Operation Guide...

  • Page 72: Gauge Status Tab

    Option to trigger relay Display Optional HART message Current loop output affected Gauge status and gauge history Gauge Status tab Diagnostic alarms and HART messages Diagnostic conditions that are currently in alarm alert users by: DSGH Installation and Operation Guide...

  • Page 73: Relay Setup

    • 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 appear in history screens but not diagnostic screens. DSGH Installation and Operation Guide...

  • Page 74: Acknowledging Diagnostic Alarms

    Cycle power to the unit. occurred on the sensor pre- amp board EEPROM that may If the alarm recurs, there is not be resolved internally. a hardware problem. Perform the procedure to repair the corrupted EEPROM on page 4-63. DSGH Installation and Operation Guide...
  • Page 75 Not used in standard software. Consult VEGA special Not used software. Sensor Status? – Sensor fail Call VEGA Field Service. Pass/Fail <1 count seen in the last 10 seconds. (Configurable by Field Service.) Indicates the sensor is malfunctioning. DSGH Installation and Operation Guide...
  • Page 76 Max density and Min density in the gauge span settings. X-Ray Alarm – Note that there are high levels Contact VEGA for further No/Yes of x-rays in your area that may information. be affecting process measurement. DSGH Installation and Operation Guide...

  • Page 77: Analog Alarm

    (x-ray) sources). X-rays that the gauge detects can cause a false low reading and adversely affect any control based on the gauge output. This alarm can: • Alter the current loop output to indicate the alarm condition DSGH Installation and Operation Guide...
  • Page 78 The device has a protection feature that safeguards against excessive radiation fields. The procedure for activating this protection is firmware dependent. Please consult the factory to activate this feature on your device. DSGH Installation and Operation Guide...

  • Page 79: Auxiliary X-Ray Alarm

    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. current loop output (mA) output 10s before x-ray Dither level time (ms) Dither time Cycle period X-ray interference alarm output DSGH Installation and Operation Guide...

  • Page 80: History Information

    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). DSGH Installation and Operation Guide...

  • Page 81: Troubleshooting

    Gen2000 for internal inspection to permit cooling and full capacitor discharge. 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 DSGH Installation and Operation Guide...

  • Page 82: Test Points

    Diagnostics and repair Power Supply and CPU Boards Test points Located on the power supply and CPU board. Power supply board test point labels Table 5.4 Label Description HART connection HART connection DSGH Installation and Operation Guide...

  • Page 83: Jumpers

    Table 5.6 Mode Gauge current loop Jumper setting Source mode Self-powered JP1 1-2, JP2 2-3 Sink mode DCS-powered JP1 2-3, JP2 1-2 The gauge does not use jumpers J1 – J4 on the CPU board. DSGH Installation and Operation Guide...

  • Page 84: Led Indicators

    Relay Relay ON = relay None Check against condition relay output indicator energized. terminals 3, 4, and 5. If no relay OFF = output, replace relay is de- power supply energized. board. DSGH Installation and Operation Guide...

  • Page 85: Cpu Board Leds

    Blinking 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. DSGH Installation and Operation Guide...
  • Page 86 Auxiliary Blinks if None Check auxiliary input auxiliary input input wiring frequency present. OFF if terminals 11 and 12 signal no auxiliary with a meter for indicator input present frequency signal. Check auxiliary input equipment. DSGH Installation and Operation Guide...
  • Page 87 ON insulation. 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.) DSGH Installation and Operation Guide...

  • Page 88: Maintenance And Repair

    Diagnostics and repair Maintenance and repair Periodic maintenance schedule Since the VEGA gauge contains no moving parts, very little periodic maintenance is required. We suggest this schedule to prevent problems and comply with radiation regulations: Periodic maintenance schedule Table 5.9...

  • Page 89: Source Functions

    CD that came with the source holder and the appropriate current regulations for details. Procedure 5.1: To record a source wipe or shutter check 1. Select Setup | Source Functions. 2. Click Record Wipe or Record Shutter Check. DSGH Installation and Operation Guide...

  • Page 90: Field Repair Procedures

    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 the information in the sensor board EEPROM.
  • Page 91 Note: If you change the CPU board, a New Hardware Found error message appears when you connect with the HART communicator. This is normal. Follow the procedure on page 4-62 for installing new hardware so the non-volatile memory on the CPU configures properly. DSGH Installation and Operation Guide...

  • Page 92: Requesting Field Service

    Replace Power Supply or CPU Board Requesting field service Contact VEGA Field Service at for parts, service, and +1 513-272-0131 repairs. Returning equipment for repair to VEGA Have this information ready: Product model that is being returned for repair  Description of the problem ...
  • Page 93 Procedure 5.4: To return equipment for repair 1. Contact your local Vega representative, using the information on above, and ask for repair service. 2. VEGA assigns the job a material return authorization (MRA) number. Note: You must first contact VEGA and receive a material return authorization number (MRA) before returning any equipment.
  • Page 94 Diagnostics and repair NOTES DSGH Installation and Operation Guide...
  • Page 95 GEN2000 unit’s serial numbe, 59 diagnostics check, 73 ground screw, internal and external, 33 CPU serial number, 59 CPU test point, 81 cross-talk, 29 current loop hand-held terminal, 21 calibrating on the bench, 25, 26 DSGH Installation and Operation Guide...
  • Page 96 Remove and Replace Red Threaded Plug, 31 alarm acknowledge, 74 Repair, 88 diagnostics check, 74 repairs in diagnostic history, 78 material return authorization (MRA) New hardware found message number, 91 responses to, 62 returning equipment to Ohmart, 90 repeatability, 46 DSGH Installation and Operation Guide...
  • Page 97 75 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 Installation and Operation Guide...
  • Page 98 NOTES DSGH Installation and Operation Guide...
  • Page 100 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. 2015 VEGA Americas, Inc. Cincinnati, Ohio, USA © Subject to change without prior notice 31392-US-150921...

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