Air Monitor VELTRON DPT-plus Installation, Operation And Maintenance Manual
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Air Monitor VELTRON DPT-plus Installation, Operation And Maintenance Manual

Microprocessor based ultra-low range pressure & flow "smart" transmitter
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Installation, Operation,
and Maintenance Manual
VELTRON DPT-plus
Microprocessor Based Ultra-Low Range
Pressure & Flow "Smart" Transmitter
Version 1.4X
Installation, Operation & Maintenance
Air Monitor Corporation provides complete
technical support between the hours of
7 a.m. and 5 p.m. PST, M-F
Contact our Service Department
Toll Free: 1-800-AIRFLOW
or fax us at 1-707-526-2825
VELTRON DPT-plus
Air Monitor Corporation
- IO&M Manual
116-010-91.P65 (09/18/09)

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Summary of Contents for Air Monitor VELTRON DPT-plus

  • Page 1 Microprocessor Based Ultra-Low Range Pressure & Flow "Smart" Transmitter Version 1.4X Installation, Operation & Maintenance Air Monitor Corporation provides complete technical support between the hours of 7 a.m. and 5 p.m. PST, M-F Contact our Service Department Toll Free: 1-800-AIRFLOW...

  • Page 3: Table Of Contents

    TABLE OF CONTENTS VELTRON DPT-plus TABLE OF CONTENTS INSTRUMENT WARRANTY ........................i SECTION 1 – GENERAL INFORMATION DESCRIPTION ..........................1 THEORY OF OPERATION ......................1 SECTION 2 – PERFORMANCE SPECIFICATIONS TRANSMITTER ..........................2 INDICATION ............................. 2 INPUTS/OUTPUTS .......................... 2 POWER ............................2 SECTION 3 –...
  • Page 4 TABLE OF CONTENTS VELTRON DPT-plus TABLE OF CONTENTS SECTION 5 – OPERATION (con't) 5.11 ALARM CONFIGURATION ....................33-34 5.12 K-FACTOR CONFIGURATION ....................35-36 5.13 DISPLAY CONFIGURATION ....................37-41 5.14 ANALOG OUTPUT CONFIGURATION ..................42 5.15 TRANSDUCER SPAN SELECTION ................... 43 5.16 TRANSMITTER INPUT CALIBRATION ..................

  • Page 5: Instrument Warranty

    Seller in writing of such defect within sixty (60) days of Air Monitor Corporation’s liability to the customer, or any discovery of the defect. other party for breach of warranty.

  • Page 6: Section 1 - General Information

    (or pressure) and temperature. The VELTRON DPT-plus is equipped with AUTO-zero for the elimination of zero error due to thermal, electric, or mechanical effects. The VELTRON DPT-plus is packaged in a NEMA 4X enclosure with industry-standard process connections. The integral LCD display provides a continuous readout of the measured process and two additional lines of operating data.

  • Page 7: Section 2 - Performance Specifications

    VELTRON DPT-plus SECTION 2 – PERFORMANCE SPECIFICATIONS 2 – PERFORMANCE SPECIFICATIONS 2.1 – TRANSMITTER 2.2 – INDICATION Accuracy. 0.1% of Natural Span, including hysteresis, Display. A backlit, graphical LCD providing three lines of deadband, non-linearity, and non-repeatability. data display. Also used for programming.

  • Page 8: Section 3 - Features

    3.2 – AIR DENSITY CORRECTION The VELTRON DPT-plus transmitter is capable of accepting a process temperature input to perform density correction to volumetric or mass flow. Temperature input is a 4-20mA signal from a remote temperature transmitter; non-linear temperature inputs can be linearized by the microprocessor.

  • Page 9: Alarm (Option)

    3.7 – K-FACTOR The VELTRON DPT-plus is equipped with a K-factor feature which allows for the calculation and introduction of a bias and/or gain factor into the transmitter's flow calculations. The K-factor feature is intended to be used in two types of applications: 1.

  • Page 10: High Turndown Ratio Operation

    3.9 – HIGH TURNDOWN RATIO OPERATION The VELTRON DPT-plus transmitter, with its high level of accuracy and automatic zeroing circuitry, can maintain linear output signals on applications requiring velocity turndown of 10 to 1 (equal to a velocity pressure turndown of 100 to 1).

  • Page 11: Section 4 - Installation

    • The VELTRON DPT-plus is housed in a NEMA Type 4X enclosure which is suitable for outdoor locations. • The VELTRON DPT-plus is Factory Mutual approved as explosion proof for Class I, Division 1, Group B, C, and D; dust-ignition proof for Class II/III, Division 1, Groups E, F, and G hazardous (classified) location, indoor and outdoor (NEMA Type 4X).

  • Page 12: Mounting

    SECTION 4 – INSTALLATION 4.3 – MOUNTING Although not required, the most convenient method for mounting the VELTRON DPT-plus is utilizing the included Mounting Bracket Kit. Figure 4.1 shows how the various components are assembled, and Figure 4.2 depicts a variety of mounting orientations.
  • Page 13 If using the Mounting Bracket Kit, Figure 4.2 depicts a variety of mounting orientations. Figure 4.2 CAUTION VELTRON DPT-plus should not be mounted solely by the process connections or electrical conduit, which do not provide sufficient support. Air Monitor Corporation VELTRON DPT-plus - IO&M Manual...

  • Page 14: Process Connections

    – Low Port on VELTRON DPT-plus connects to sensor from monitored room. Although any size of tube/pipe can be used, the response time of the VELTRON DPT-plus to process change increases if with increasing tube/pipe size or increasing in tube/pipe length.

  • Page 15: Power/Signal Connections

    Power should be OFF when connecting power wiring to the VELTRON DPT-plus. POWER SUPPLY (Terminals LINE and NEUT). Power required by the VELTRON DPT-plus must be connected to the two terminals labeled LINE and NEUT. Earth ground should be connected to the terminal lug provided on the upper left mounting stud (see Figure 4.4).
  • Page 16 Which of the following connection methods to use is determined by how the unit is configured. INTERNALLY POWER/NON-ISOLATED (Terminals 2(SIG COM) and 3(OUT-1)). This 4-20mA output is sourced (powered) by the VELTRON DPT-plus. Maximum load resistance is dependent on the power supply voltage, see load graph (Figure 4.5).
  • Page 17 INTERNALLY POWER/NON-ISOLATED (Terminals 2(SIG COM) and 4(OUT-2)). This 4-20mA output is sourced (powered) by the VELTRON DPT-plus. Maximum load resistance is dependent on the power supply voltage, see load graph (Figure 4.5). EXTERNALLY POWERED/ISOLATED (Terminals 4(OUT-2) and 5 (ISO PWR INPUT)). Power for this 4-20mA output is via an external (customer provided) 12-32VDC supply.
  • Page 18 SECTION 4 – INSTALLATION VELTRON DPT-plus 4.5 – POWER/SIGNAL CONNECTIONS (con't) ALARM 2/AUTO-purge ACKNOWLEDGMENT (Terminals 6(PURGE ACK) and 7(COM)). This set of unpowered relay contacts is used for Alarm 2 status or as AUTO-purge acknowledgment. Contacts are normally open and close at the existence of an alarm condition or the initiation of an AUTO-purge cycle.

  • Page 19: Section 5 - Operation

    VELTRON DPT-plus Factory Information Set-Up Sheet, provided separately. Review this information and verify that the VELTRON DPT-plus set-up is correct for your application. If any problems or discrepancies are detected, contact Air Monitor's Customer Service Department at 1-800-AIRFLOW prior to proceeding.

  • Page 20: Normal Operation

    *Note: – The interval clock for AUTO-zero cycles is initiated when the VELTRON DPT-plus power is turned on. The time intervals (preset in User Setup menu) will then start their timing sequence. – To reset the interval clock, turn power off for a minimum of 10 seconds, then turn power back on. Interval clock will then initiate at time zero.

  • Page 21: Pushbutton Definition

    VELTRON DPT-plus SECTION 5 – OPERATION 5.5 – PUSHBUTTON DEFINITION The four pushbuttons used to interface with the VELTRON DPT-plus are identified by their symbols. The symbols are defined as follows: DOWN ENTER ESCAPE In addition to Configuration programming, pushbuttons can be used for certain functions when in the Normal operation mode.

  • Page 22: Configuration Programming

    Transducer Characterization Selection Allows transducer characterization data to be entered when transducer is replaced. Display Internal Temperature Allows for displaying the internal temperature of the VELTRON DPT-plus unit. Perform Transmitter Reset Allows for restarting the transmitter in case of lock-up.
  • Page 23 VELTRON DPT-plus SECTION 5 – OPERATION 5.6 – CONFIGURATION PROGRAMMING (con't) Once the desired Selection is displayed, its sub-menu can be entered by pressing To better understand the process of Configuration Programming, arrows with pushbutton designations have been included on the following flow chart of AUTO-zero Configuration. This will aid in the navigation of the Configuration Programming Process.

  • Page 24: Transmitter Scaling & Configuration

    SECTION 5 – OPERATION 5.7 – TRANSMITTER SCALING & CONFIGURATION This Main Menu selection is where all application specific data is entered to configure the VELTRON DPT-plus for a unique application. Data is entered in sub-menu, Process Configuration, and as applicable, sub-menu, Temperature Configuration.
  • Page 25 VELTRON DPT-plus SECTION 5 – OPERATION 5.7 – TRANSMITTER SCALING & CONFIGURATION (con't) User Setup Main Menu Trans. Scaling & Configuration - Process Configuration Process Configuration - EXIT User Setup - Temperature Configuration  Trans. Scaling & Config. Default selection shown.
  • Page 26 VELTRON DPT-plus SECTION 5 – OPERATION 5.7 – TRANSMITTER SCALING & CONFIGURATION (con't) 1. While in Main Menu, use to scroll to: Transmitter Scaling and Configuration 2. Press to enter Transmitter Scaling & Configuration menu. Display will indicate: Process Configuration 3.
  • Page 27 VELTRON DPT-plus SECTION 5 – OPERATION 5.7 – TRANSMITTER SCALING & CONFIGURATION (con't) UNITS LIST For Process Type – Flow UNIT OF MEASUREMENT DISPLAY cubic feet per second cubic feet per minute cubic feet per hour liters per second liters per minute...
  • Page 28 VELTRON DPT-plus SECTION 5 – OPERATION 5.7 – TRANSMITTER SCALING & CONFIGURATION (con't) UNITS LIST for Process Type – Velocity UNIT OF MEASUREMENT DISPLAY feet per second feet per minute feet per hour meters per second meters per minute meters per hour...
  • Page 29 VELTRON DPT-plus SECTION 5 – OPERATION 5.7 – TRANSMITTER SCALING & CONFIGURATION (con't) UNITS LIST for Process Type – Differential Pressure UNIT OF MEASUREMENT DISPLAY inches of water column in.WC inches of mercury in.Hg pounds per square inch, gauge psig...
  • Page 30 VELTRON DPT-plus SECTION 5 – OPERATION 5.7 – TRANSMITTER SCALING & CONFIGURATION (con't) Temperature Configuration Default selection shown. Available selections: Temperature Temperature On/Off ON or OFF Off/On Selection Input Linearization Input Linearization ON or OFF Selection Thermocouple TypeE Thermocouple Type J...
  • Page 31 VELTRON DPT-plus SECTION 5 – OPERATION 5.7 – TRANSMITTER SCALING & CONFIGURATION (con't) 12. Use to change setting. Once desired setting is displayed, press , new setting will be stored in memory and display will return to the Temperature Configuration sub-menu as in Step 10.
  • Page 32 VELTRON DPT-plus SECTION 5 – OPERATION 5.7 – TRANSMITTER SCALING & CONFIGURATION (con't) User should not need to use the following Calculator unless: a. Process parameters have changed and new Differential Pressure or Flow values are needed. b. Mid-point operating Differential Pressure or Flow values are wanted.
  • Page 33 VELTRON DPT-plus SECTION 5 – OPERATION 5.7 – TRANSMITTER SCALING & CONFIGURATION (con't) Continued from next page Wet / Dry Flow Basis Wet / Dry Flow Basis DRY or WET Selection Percentage Water Percentage Water 0.00 to 50.00% 0.00% in 0.01 increments Selection 0.000 to 65.000...
  • Page 34 VELTRON DPT-plus SECTION 5 – OPERATION 5.7 – TRANSMITTER SCALING & CONFIGURATION (con't) As an example of how to utilize the calculator, the following shows how to change the Operating Span if the process temperature is 150ºF. 16. While in Transmitter Scaling & Configuration menu, use...

  • Page 35: Low Pass Filter

    VELTRON DPT-plus SECTION 5 – OPERATION 5.8 – LOW PASS FILTER User can select level of filtering applied to the transducer output*. Levels are 0 to 8, with 0 representing no filtering and 8 representing maximum filtering. * This filtering affects all subsequent outputs, displays, alarms, etc., that utilize the transducer output.

  • Page 36: Auto-Zero Configuration

    VELTRON DPT-plus SECTION 5 – OPERATION 5.9 – AUTO-zero CONFIGURATION User can turn AUTO-zero function ON or OFF, and select activation interval. User Setup Main Menu Auto-Zero Configuration Default selection shown. Available selections: Low Pass Filter Selection - Auto-Zero Off / On Selection Auto-Zero Off / On ...

  • Page 37: Auto-Purge Configuration

    VELTRON DPT-plus SECTION 5 – OPERATION 5.10 – AUTO-purge CONFIGURATION Refer to AUTO-purge Installation, Operation & Maintenance Manual for configration information. Use r Setup Main Me nu - Auto-Zero Conf iguration Auto-Purge Configuration See I, O & M Manual - Alarm Conf iguration...

  • Page 38: Alarm Configuration

    VELTRON DPT-plus SECTION 5 – OPERATION 5.11 – ALARM CONFIGURATION User can turn Alarm function ON or OFF, select type of alarm (See Section 3.5 – Features for description of the different Alarm types), and set the following values: Low Setpoint (this is Low, Low1, or High1 depending on Alarm Type): Selected value of transmitter span, below (for Low and Low1) or above (for High 1) which an alarm condition will exist.
  • Page 39 VELTRON DPT-plus SECTION 5 – OPERATION 5.11 – ALARM CONFIGURATION (con't) 1. While in Main Menu, use to scroll to: Alarm Configuration 2. Press to enter Alarm Configuration menu. Display will indicate: Alarm 1 Off/On Selection 3. Press and display will indicate current setting of Alarm (OFF or ON).

  • Page 40: K-Factor Configuration

    VELTRON DPT-plus SECTION 5 – OPERATION 5.12 – K-FACTOR CONFIGURATION Caution In the majority of applications, the use of a K-Factor is neither required nor desirable. Before using the K-Factor feature, contact the Service Department (see Section 10) to review the application and obtain assistance in determining the K-Factor gain and bias values.
  • Page 41 VELTRON DPT-plus SECTION 5 – OPERATION 5.12 – K-FACTOR CONFIGURATION (con't) 1. While in Main Menu, use to scroll to: K-Factor Configuration 2. Press to enter K-Factor Configuration menu. Display will indicate: K-Factor Off/On Selection 3. Press and display will indicate current setting of K-Factor (OFF or ON).

  • Page 42: Display Configuration

    VELTRON DPT-plus SECTION 5 – OPERATION 5.13 –DISPLAY CONFIGURATION User can select display parameter, for lines 2 and 3. Also, each line can have a level of filtering, 0 through 4 (4 is maximum) selected by User. User Setup Main Menu Display Configiguration Default selection shown.
  • Page 43 VELTRON DPT-plus SECTION 5 – OPERATION 5.13 –DISPLAY CONFIGURATION 1. While in Main Menu, use to scroll to: Display Configuration 2. Press to enter Display Configuration menu. Display will indicate: LINE 1 3. Press to enter Setup menu. Display will indicate:...
  • Page 44 VELTRON DPT-plus SECTION 5 – OPERATION 5.13 – DISPLAY CONFIGURATION (con't) 8. Press and display will indicate: LINE 2 PARAMETER 9. Press and display will indicate current parameter selected to display on Line 2 (see Parameter List at the end of this section for available selections).
  • Page 45 VELTRON DPT-plus SECTION 5 – OPERATION 5.13 – DISPLAY CONFIGURATION (con't) 21. Press , display will indicate: LINE 2 Cursor indicates position to be set. SET CUSTOM TEXT There are 20 positions available to hold custom text. 22. Use to scroll through available characters (see ASCII Chart at the end of this section for available characters).
  • Page 46 VELTRON DPT-plus SECTION 5 – OPERATION 5.13 – ENHANCED DISPLAY CONFIGURATION (con't) PARAMETER LIST for Lines 2, 3, and 4 PARAMETER DISPLAY in "NORMAL" MODE NONE DIFF. PRESSURE* D. PRESS  TRANSMITTER VELO VELO. TEMPERATURE TEMP  ALARM LOW SETPOINT LO SP ...

  • Page 47: Analog Output Configuration

    VELTRON DPT-plus SECTION 5 – OPERATION 5.14 – ANALOG OUTPUT CONFIGURATION User can select which process variable Output 2 represents. Process variables available for output are: – Transmitter Differential Pressure – Transmitter Flow – Temperature (only if temperature is a parameter used in Density Compensation) User Setup Main Menu Default selection shown.

  • Page 48: Transducer Span Selection

    VELTRON DPT-plus SECTION 5 – OPERATION 5.15 – TRANSDUCER SPAN SELECTION Displays the transducer's natural span and operating span. The natural span represents the maximum process pres- sure that the transducer can accept. The displayed natural span is for user/technician reference only and should not be changed unless a new transducer of different natural span has been installed.

  • Page 51: Section 6 - Calibration

    This section will detail steps necessary to calibrate the VELTRON DPT-plus. Calibration is accomplished using the four programming push buttons detailed in Section 5. This section can be accomplished with the VELTRON DPT-plus mounted in its operating location or at a test bench in a calibration lab.

  • Page 52: Transmitter Input Calibration

    6.3.1 For Units With Positive or Negative Differential Pressure Spans. Zero pressure and transducer natural span pressure will be applied to the VELTRON DPT-plus, unit will be programmed to recognize these pressures as zero and span for transmitter input calibration.
  • Page 53 14. If temperature signal is provided by temperature device, connect a current generator across Terminals 11 and 2 (see Figure 4.8). If temperature signal is powered by VELTRON DPT-plus, connect a loop powered temperature simulator across Terminals 11 and 12 (see Figure 4.9).
  • Page 54 6.3.2 For Units With Bi-Polar Spans. Minimum and maximum transducer natural span pressure will be applied to the VELTRON DPT-plus, unit will be programmed to recognize these pressures as zero and span for transmitter input calibration. 1. Connect input pressure to Low port of VELTRON DPT-plus.
  • Page 55 16. If temperature signal is provided by temperature device, connect a current generator across Terminals 11 and 2 (see Figure 4.8). If temperature signal is powered by VELTRON DPT-plus, connect a loop powered temperature simulator across Terminals 11 and 12 (see Figure 4.9).
  • Page 56 4. Connect a DMM set for mADC in series with Output 1 (see Section 4.5). DMM should be reading minimum value of 4.00 ± 0.01mA. 5. If DMM is reading out of tolerance, use to adjust VELTRON DPT-plus output for an acceptable DMM reading. Depending on DMM's selected range, the button may need to be pressed and held for a period of time before any change occurs in the DMM's display.

  • Page 57: Transmitter Output Calibration

    12. Press until display indicates: Return to MAIN MENU 13. Press and scroll Main Menu to: EXIT User Setup 14. Press and VELTRON DPT-plus will return to Normal mode of operation. Air Monitor Corporation VELTRON DPT-plus - IO&M Manual 116-010-91.P65 (09/18/09)

  • Page 58: Section 7 - Maintenance

    SECTION 7 – MAINTENANCE 7 – MAINTENANCE The VELTRON DPT-plus is a solid state device having few mechanical parts requiring special periodic maintenance. The following maintenance steps are not requirements, but guidelines for establishing a maintenance program for your specific installation.

  • Page 59: Section 8 - Troubleshooting

    SECTION 8 – TROUBLESHOOTING 8 – TROUBLESHOOTING Personnel should be familiar with the operation of the VELTRON DPT-plus (see Section 5) before performing any troubleshooting. Note: Prior to performing any troubleshooting, turn power OFF. After 10 seconds, turn power switch ON. If problem still exists, proceed with troubleshooting steps.

  • Page 60: Section 9 - Parts List

    SECTION 8 – TROUBLESHOOTING 9 – PARTS LIST • The following drawing with part numbers list components of the VELTRON DPT-plus that are easily replaced by the user. • To inquire about price and availability of a specific part number, please contact the Customer Service Department...

  • Page 61: Section 10 - Customer Service

    Confirmation of Return Authorization with shipping instructions will be sent via facsimile. Equipment to be returned to Air Monitor should be returned in its original shipping container if possible. If this is not possible, ensure equipment is packaged sufficiently to protect it during shipment.

  • Page 62: Appendix A - Factory Set-Up Information Sheet

    VELTRON DPT-plus APPENDIX A APPENDIX A FACTORY SET-UP SHEETS (provided separately with the transmitter) Air Monitor Corporation VELTRON DPT-plus - IO&M Manual 116-010-91.P65 (09/18/09)

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