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

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Air Monitor VELTRON DPT-plus Installation, Operation And Maintenance Manual Download Page 9

VELTRON DPT-

plus

Air Monitor Corporation

116-010-91.P65 (09/18/09)

VELTRON DPT-

plus

 - IO&M Manual

4

3.5 – ALARM (option)

The VELTRON DPT-

plus

 Alarm provides the means for having the process signal compared to user selectable alarm

points and automatically activates a Form A relay to generate dry contact alarm signal(s).  User selectable alarm
configurations of Low/High, Low1/Low2, and High1/High2 plus Alarms On/Off, Setpoints, Dead Bands, and Delays are
configurable via the User Setup menu.  Alarm Setpoints can be displayed during 

Normal

 operating mode.

One choice among three alarm types are available to the user: Low/High; Low1/Low2; or High1/High2.  An Alarm Delay
is available, if implemented (any time setting greater than zero), any condition that would normally cause an alarm,
triggers the delay timer first.  If the alarm condition still exists after the delay times out, then the appropriate alarm
relay(s) are activated.                will be displayed whenever any alarm relay is activated.  Alarm On/Off, Type, Setpoints,
Deadbands, and Delays are available and configurable using the User Setup menu.  The Alarm Setpoints can be
displayed during 

Normal

 operation.

High Alarm

Process Signal

High2 Alarm

Point

Point

Process Signal

Low1 Alarm

High1 Alarm

Point

Point

Low Alarm

Low2 Alarm

Process

Point

Point

Signal

Low/High Alarm

Low1/Low2 Alarm

High1/High2 Alarm

3.6 – DATA DISPLAY

The integral display is a multi-line, backlit graphical LCD capable of displaying three lines of operating data.  It can also
display a user settable I.D. number using any combination of standard ASCII characters.  It is also used by the User
Setup menu for displaying the menu parameters and values.  Configuring the display for 

Normal

 operation is done using

the User Setup menu.

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. To adjust for flow measurement error as a result of highly distorted airflow induced by upstream or downstream flow

disturbances.

2. To adjust the transmitter's output to bring it into close correlation with field measured flow data.

The K-Factor gain and bias values can be entered directly or the VELTRON DPT-

plus

 can calculate these values based

on measured and reference values from a 1, 2 or 3 point airflow traverse.

3.8 – FLOW/DIFFERENTIAL PRESSURE CALCULATOR

The VELTRON DPT-

plus

 is equipped with an integral calculator feature that allows the user to determine the maximum

flow or differential pressure from the appropriate variables.  This feature allows the user to determine input or output
values at various points of the process or new values if the process parameters have changed.  Also, the calculator can
be used to implement a single-point density compensation for operating temperature and/or absolute pressure.

SECTION 3 – FEATURES

alrm

Summary of Contents for VELTRON DPT-plus

Page 1: ... 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 Air Monitor Corporation 116 010 91 P65 09 18 09 VELTRON DPT plus IO M Manual Precision Airflow Measurement An ONICON Brand ...

Page 2: ......

Page 3: ...ARM option 4 3 6 DATADISPLAY 4 3 7 K FACTOR 4 3 8 FLOW DIFFERENTIAL PRESSURE CALCULATOR 4 3 9 HIGHTURNDOWN RATIO OPERATION 5 3 10 HAZARDOUS LOCATIONS 5 3 11 ENCLOSURE 5 3 12 MULTIPLE OPERATING POWER SELECTIONS 5 SECTION 4 INSTALLATION 4 1 RECEIVINGAND INSPECTION 6 4 2 LOCATION 6 4 3 MOUNTING 7 8 4 4 PROCESS CONNECTIONS 9 4 5 POWER SIGNAL CONNECTIONS 10 13 SECTION 5 OPERATION 5 1 INTRODUCTION 14 5 ...

Page 4: ...CHARACTERIZATION SELECTION 44 5 19 DISPLAY INTERNAL TEMPERATURE 45 5 20 TRANSMITTER RESET 45 SECTION 6 CALIBRATION 6 1 REQUIRED EQUIPMENT 46 6 2 PREPARATION 46 6 3 TRANSMITTER INPUT CALIBRATION 47 50 6 4 TRANSMITTER OUTPUT CALIBRATION 51 52 SECTION 7 MAINTENANCE 53 SECTION 8 TROUBLESHOOTING 54 SECTION 9 PARTS LIST 55 SECTION 10 CUSTOMER SERVICE 56 APPENDIX A FACTORY SET UP INFORMATION SHEET 57 TAB...

Page 5: ...iginal components Purchaser shall notify Seller in writing of such defect within sixty 60 days of discovery of the defect This warranty does not extend to any product sold by Seller which has been the subject of misuse neglect accident damage or malfunction caused by interconnection with equipment manufactured by others improper installation or storage or used in violation of instructions furnishe...

Page 6: ...ing data 1 2 THEORY OF OPERATION High and low pressure signals generated by airflow stations and probes or static pressure sensors act upon opposite sides of a flexible diaphragm within the transducer The differential between the two pressure signals displaces the diaphragm the magnitude of the displacement being measured creates an electrical DC output from the transducer After undergoingA D conv...

Page 7: ...ption Standard 8VA at 24VAC 6VA at 24VDC 36VA at 120VAC Circuit Protection Power input is fused and reverse polarity protected 2 1 TRANSMITTER Accuracy 0 1 of Natural Span including hysteresis deadband non linearity and non repeatability Type Differential pressure flow and mass flow Ranges Natural Spans Bi Polar Natural Spans 0 to 25 00 IN w c 0 to 10 00 IN w F 10 00 to 10 00 IN w c 0 to 5 00 IN w...

Page 8: ... performed or when an AUTO purge cycle is in progress When in Hold all Normal mode processing is halted and outputs are held at their last value prior to Hold Normal operation is indicated by the CPU Activated dot in the upper right of the display blinking at a rate of four times per second A Hold mode is indicated by the CPU Activated dot blinking at a rate of once per second 3 4 AUTOMATIC ZEROIN...

Page 9: ...s a multi line backlit graphical LCD capable of displaying three lines of operating data It can also display a user settable I D number using any combination of standard ASCII characters It is also used by the User Setup menu for displaying the menu parameters and values Configuring the display for Normal operation is done using the User Setup menu 3 7 K FACTOR The VELTRON DPT plus is equipped wit...

Page 10: ... of 100 to 1 3 10 HAZARDOUS LOCATIONS Hazardous Locations The VELTRON DPT plus transmitter is Factory Mutual approved for the following Explosion Proof Class 1 Division 1 Groups B C D Dust Ignition Proof Class II III Division 1 Groups E F G Suitable for indoor and outdoor NEMAType 4X hazardous locations 3 11 ENCLOSURE The VELTRON DPT plus transmitter is packaged in a NEMA Type 4X enclosure with st...

Page 11: ...n the Factory Set Up Information Sheet is correct for your application If not contactAir Monitor s Customer Service Department at 1 800 AIRFLOW for further guidance Note The VELTRON DPT plus has been configured and calibrated to customer specified parameters see Fac tory Setup Information Sheet at the end of this Manual and requires no additional calibration verification prior to installation 4 2 ...

Page 12: ...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 Figure 4 1 CAUTION Do not rotate the electronics enclosure relative to the base Internal signal tubing could become twisted or kinked causing possible transducer overpressurization voiding warranty SECTION 4 INSTALLATION ...

Page 13: ...nual 8 4 3 MOUNTING con t 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 SECTION 4 INSTALLATION ...

Page 14: ...flow measuring devices When connecting VELTRON DPT plus for positive room pressurization connections must be completed as follows High Port on VELTRON DPT plus connects to sensor from monitored room Low Port on VELTRON DPT plus connects to reference sensor When connecting VELTRON DPT plus for negative room pressurization connections must be completed as follows High Port on VELTRON DPT plus connec...

Page 15: ...he maximum gauge that the terminal strip can accommodate No more than two wires should be connected to any one terminal 18AWG is the maximum gauge wire that can be doubled up in one terminal Note It is recommended that an ON OFF switch be placed in line of the incoming power to allow turning power on and off Power should be OFF when connecting power wiring to the VELTRON DPT plus POWER SUPPLY Term...

Page 16: ...r unit is configured 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 20mAoutput is sourced powered by the VELTRON DPT plus Maximum load resistance is dependent on the power supply voltage see load graph Figure 4 5 Figure 4 5 EXTERNALLY POWERED ISOLATED Terminals 3 OUT 1 and 5 ISO PWR I...

Page 17: ...rminals 4 OUT 2 and 5 ISO PWR INPUT Power for this 4 20mA output is via an external customer provided 12 32VDC supply Maximum load resistance is dependent on the power supply voltage see load graph Figure 4 6 Note If it is desired to change from internally powered to externally powered or vice versa it is required that jumpers J1 through J5 be changed in addition to the change in wiring at the ter...

Page 18: ...Sheet provided separately to determine which if any your unit is configured for AUTO purge START SIGNAL Terminals 9 PURGE START INPUT and 10 GND Customer to provide momentary 0 5 to 10 seconds unpowered dry contact as notification of AUTO purge cycle initiation Upon receiving this signal transmitter hold will be activated TEMPERATURE INPUT Terminals 2 SIG COM 11 TEMP INPUT and 12 LOOP POWER Follow...

Page 19: ...llation has been verified in accordance with Section 4 apply power 2 Display will briefly indicate DPT plus Dot will blink at a rate of once per second Version 1 40 Your actual version may be different Followed by DPT plus Version 1 40 After 5 seconds display will indicate DPT plus Version 1 40 Thanks for Choosing AIR MONITOR for approximately 10 seconds to perform AUTO zero and then return to Nor...

Page 20: ... interval selection in User Setup does not reset time clock AUTO purge If the AUTO purge option has been enabled at the factory see Factory Set Up Information Sheet it will be activated at periodic intervals determined by the smart relay located in theAUTO purge panel program ming When activated display will be frozen and all outputs will remain constant and will appear in the upper right of the d...

Page 21: ...e value or mode within a parameter Enters user into specific selection sub menu from Main Menu Selection Displays current setting of selected Parameter Enters the selected value or setting into memory Use as an escape key to exit Main Menu selection to avoid scrolling to Return to MAIN MENU Use as a quick way to advance to the last item selected when USER SETUP MAIN menu is selected if the last it...

Page 22: ...figuration of process variable such as Density Compensation Type Square root process type process minimum maximum units duct area percent lockdown and Temperature configuration Also offers a Flow D P calculator that allows user to calculate maximum flow or differential pressure based on entered variables Selects amount of filtering applied to transducer output Turns AUTO zero function ON or OFF an...

Page 23: ...display field Those that are not available for further configuration programming will not have the arrow symbol displayed and will display NOTINSTALLED beneath the selection description Example AUTO purge Not Installed The remainder of this Section details steps to verify or change Configuration Programming of all Main Menu Selections At any time while in the Main Menu User can return to Normal op...

Page 24: ...actory has entered data in this section based on customer supplied information Data can be reviewed and verified by scrolling through the individual menu items or reviewing the Factory Set Up Information sheet at the end of this Manual Review this information BEFORE making any changes as they can have a significant effect on the operation of the VELTRON DPT plus Under a third sub menu Calculator f...

Page 25: ... selections Process Format Selection Process Format FLOW XX XXX SCFM Depends on process Type and Format Process Minimum Selection Process Minimum FLOW 0 SCFM Depends on process Type and Format Process Maximum Selection Process Maximum FLOW 10 000 SCFM Sq Feet Sq Inches Sq Meters or Sq Centimeters Duct Area Units Selection5 Duct Area Units Square Feet 0 0000 to 3250 0 Sq Ft Duct Area Selection 5 Du...

Page 26: ...Configuration sub menu press Unit will remain programmed as it was originally 6 Use or to select remaining parameters to be changed within the Process Configuration sub menu See the following Units Lists for the available Process Units selections for the appropriate Process Type See the following Format List for the available Process Format selections 7 Follow Step 5 to make any changes to paramet...

Page 27: ...ond Actual liters per minute Actual liters per hour Actual cubic meters per second Actual cubic meters per minute Actual cubic meters per hour Percent Standard cubic feet per second Standard cubic feet per minute Standard cubic feet per hour Standard liters per second Standard liters per minute Standard liters per hour Standard cubic meters per second Standard cubic meters per minute Standard cubi...

Page 28: ...s Am m Am hr SFPS SFPM SFPH Sm s Sm m Sm hr Nm s Nm m Nm hr 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 Actual feet per second Actual feet per minute Actual feet per hour Actual meters per second Actual meters per minute Actual meters per hour Percent Standard feet per second Stan...

Page 29: ...ury pounds per square inch gauge Pascals kilo Pascals bars millibars millimeter of water column millimeter of mercury kilograms per square meter Percent in WC in Hg psig Pa kPa bars mbars mm WC mm Hg kg m2 FORMAT LIST 0XXXXX 0 XXXXX X XXXX XX XXX XXX XX X XXX X XX XXX XXX XX0 XXXX X00 XXXX 000 025000 to 025000 0 25000 to 0 25000 2 5000 to 2 5000 25 000 to 25 000 250 00 to 250 00 2 500 0 to 2 500 0...

Page 30: ...ion Input Linearization OFF Temperature Type Selection7 Temperature Type Thermocouple TypeK EXIT Temperature Configuration 6 Available only if Density Compensation is OFF ON or OFF Minimum Temp Selection Minimum Temp 0 F Default Temp Selection 9 Default Temp 250 F 8 Temp Fault Output Selection Maximum Temp Selection Maximum Temp 500 F 8 7 Available only if Input Linearization is ON 8 Maximum Value...

Page 31: ...nfiguration sub menu as in Step 10 Note If user desires not to change the setting and return to the Temperature Configuration sub menu press Unit will remain programmed as it was originally 13 Use or to select remaining parameters to be changed within the Temperature Configuration sub menu 14 Follow Step 12 to make any changes to parameters 15 To return to the Transmitter Scaling Configuration men...

Page 32: ... below Calculate D P Flow DIFF PRES DIFF PRES or FLOW Calculate D P Flow Selection Diff Pressure 1 000 in WC 0 000 to 25 000 inWC in 0 001 increments Diff Pressure Selection5 Default selection shown Available selections Process Static Pres 0 0 in WC6 Process Temp 68 F Standard Temp 68 F 295 0 to 1 630 0 in WC in 0 01 increments 50 to 2000 F in 1 increments 0 to 100ºF in 1º increments Calculator Fo...

Page 33: ...date Flow Value 5 Update Operating Span Diff Press Value7 Reset Calculation Default Values EXIT Update Flow NO Update Operating Span NO NO or YES 4 Calculator uses parameters entered in Process Configuration ie Type Max Area Units etc as necessary to perform calculation Steps in this Section marked with indicate values or choices previously made in Process Congiuration Exits to Trans Scaling Confi...

Page 34: ...0 Press and use button until temperature reads 150ºF 21 Press and scroll to Calculate Diff Pres Value 22 Press and a new value for Differential Pressure will be displayed 23 Press and and display will read Update Operating Span Diff Pres Value 24 Press scroll to YES and press display will return to that shown in Step 16 and new operating span will be stored in memory Note If during this step displ...

Page 35: ...ile in Main Menu use or to scroll to Low Pass Filter Selection 2 Press and display indicates current setting of Low Pass Filter 0 none to 8 Maximum 3 Use or to change setting Once desired setting is displayed press new setting will be stored in memory and display will return to Main Menu Note If user desires not to change the setting and return to Main Menu press Unit will remain programmed as it ...

Page 36: ...oAUTO zero Configuration menu as in Step 2 Note If user desires not to change the setting and return to AUTO zero Configuration menu press Unit will remain programmed as it was originally 5 Use or to select remaining parameters to be changed 6 Follow Step 4 to make any changes to parameters 7 To return to Main Menu select Return to MAIN MENU in AUTO zero Configuration menu and press SECTION 5 OPER...

Page 37: ... DPT plus IO M Manual 32 SECTION 5 OPERATION 5 10 AUTO purge CONFIGURATION Refer toAUTO purge Installation Operation Maintenance Manual for configration information Auto Zero Conf iguration Auto Purge Configuration Alarm Conf iguration User Setup Main Menu See I O M Manual ...

Page 38: ... an alarm condition existing and alarm activation Adjustable between 0 0 and 10 0 minutes in 0 1 minute increments 33 SECTION 5 OPERATION Alarm 1 Off On Selection Alarm 2 Off On Selection Alarm Type Selection Alarm 1 Low 2 Setpt Selection Alarm 2 High3 Setpt Selection Alarm 1 Dead Band Selection Alarm 2 Dead Band Selection Alarm 1 Delay Selection Alarm 2 Delay Selection Return to MAIN MENU Alarm 1...

Page 39: ...rent setting of Alarm OFF or ON 4 Use or to change setting Once desired setting is displayed press New setting will be stored in memory and display will return to Alarm Configuration menu as in Step 2 Note If user desires not to change the setting and return to Alarm Configuration menu press Unit will remain programmed as it was originally 5 Use or to select remaining parameters to be changed 6 Fo...

Page 40: ...n Value2 K Factor Bias Value2 K Factor Gain Selection4 K Factor Bias Selection4 Return to MAIN MENU K Factor Gain 1 000 0 400 to 5 000 0 001 increments K Factor Configuration Return to MAIN MENU 25 00 to 25 00 in 0 01 increments K Factor Bias 0 00 K Factor Off On OFF OFF or ON 1 Not available if Process Type is D P see Transmitter Scaling Config 2 Available only if YES is selected in Calculate K F...

Page 41: ...e current setting of K Factor OFF or ON 4 Use or to change setting Once desired setting is displayed press New setting will be stored in memory and display will return to K Factor Configuration menu as in Step 2 Note If user desires not to change the setting and return to K Factor Configuration menu press Unit will remain programmed as it was originally 5 Use or to select remaining parameters to b...

Page 42: ...ILTER 3 EXIT LINE 1 FILTER EXIT LINE 2 Parameter DIFF PRESSURE LINE 2 FILTER 0 None see Parameter List for selection for lines 2 3 0 None to 4 Maximum Default selection shown Available selections User Setup Main Menu Display Configiguration LINE 2 EXIT Return to MAIN MENU LINE 1 FILTER 0 None 0 None to 4 Maximum LINE 1 EXIT LINE 3 same as LINE 2 3 Not avail if Parameter is ALARM SETPOINT or CUSTOM...

Page 43: ...icate LINE 1 FILTER 4 Press and display will indicate current setting of the filter 0 None 1 Minimum 2 3 or 4 Maximum 5 Use or to change setting Once desired setting is displayed press New setting will be stored in memory and display will return to Display Configuration menu as in Step 3 Note If user desires not to change the setting and return to Display Configuration menu press Unit will remain ...

Page 44: ... Step 20 For other parameters continue with Step 12 12 Press and display will indicate LINE 2 FILTER Note This selection is available only if Parameter selected is Temperature or Diff Pressure 13 Press and display will indicate current Filter setting selected for Line 1 1 None 2 Minimum 3 4 or 5 Maximum 14 Use or to scroll to desired filter setting Press and filter setting will be stored in memory...

Page 45: ...and 23 for all 20 positions When position 20 is entered user will be exited back to display as in Step 20 25 Press and display will indicate LINE 2 EXIT 26 Press or and display will indicate LINE 3 27 Repeat Steps 8 through 16 for Line 3 The only difference being the change of Line in the display Note In Set Custom Text mode the pushbuttons can be used in the following combinations to facilitate p...

Page 46: ...er Chart Available only if Square Root Function is ON Available only if Transmitter Flow is selected as Process Type Available only if Alarm Function has been installed D PRESS VELO TEMP LO SP HI SP LO1 SP LO2 SP HI1 SP HI2 SP XX PARAMETER LIST for Lines 2 3 and 4 PARAMETER DISPLAY in NORMAL MODE NONE DIFF PRESSURE TRANSMITTER VELO TEMPERATURE ALARM LOW SETPOINT ALARM HIGH SETPOINT ALARM LOW1 SETP...

Page 47: ... D P TEMPERATURE 4 Use or to change setting Once desired setting is displayed press New setting will be stored in memory and display will return to Analog Output Configuration menu as in Step 2 Note If user desires not to change the setting and return to Analog Output Configuration menu press Unit will remain programmed as it was originally 5 To return to Main Menu select Return to MAIN MENU in An...

Page 48: ...ed setting is displayed press New setting will be stored in memory and display will return to Main Menu Caution Only change setting if a transducer of different natural span has been installed Note If user desires not to change the setting and return to Main Menu press Unit will remain programmed as it was originally 5 Use or to select remaining parameters to be changed 6 Follow Step 4 to make any...

Page 49: ......

Page 50: ......

Page 51: ...ng location 6 1 REQUIRED EQUIPMENT 1 Digital Manometer capable of reading to the nearest 0 001 w c 2 Digital Multimeter 3 Source of clean dry instrument air 4 Adjustable low pressure regulator such as AMC Low Pressure Air Source or equal 5 Temperature simulator or current generator 6 2 PREPARATION 1 Turn Power to the VELTRON DPT plus OFF 2 Remove both covers of the VELTRON DPT plus 3 Slide switch ...

Page 52: ...tle Time 4 Display will count down to 0 after which it will indicate Input Zero Done Push ESCAPE Display will count down to 0 after which it will indicate Input Span Done Push ESCAPE Note If pressure input is less than 40 or greater than 110 of transducer s Natural span value see Factory Set Up Information Sheet display will indicate Bad Input Span Push ESCAPE If this occurs check input pressure a...

Page 53: ...f temperature input value which is indicated on the display 16 Press and display will indicate Temperature Zero Settle Time 4 Sec Display will count down to 0 after which it will indicate Input Zero Done Push ESCAPE 17 Press and then display will indicate Temperature Span Calib XXX ºF 18 Adjust temperature signal for maximum value of temperature input value which is indicated on the display 19 Pre...

Page 54: ...ill indicate Transducer Zero Push ENTER 7 Press and display will indicate Transducer Zero Settle Time 4 Display will count down to 0 after which it will indicate Input Zero Done Push ESCAPE 49 8 Press and then display will indicate Transducer Span Calib X XX in WC 9 Connect input pressure to the High port of the VELTRON DPT plus 10 Apply input pressure as read on manometer to the High Port of the ...

Page 55: ... value of temperature input which is indicated on the display 18 Press and display will indicate Temperature Zero Settle Time 4 Sec Display will count down to 0 after which it will indicate Input Zero Done Push ESCAPE 19 Press and then display will indicate Temperature Span Calib XXX ºF 20 Press and display will indicate Temperature Span Push ENTER 21 Adjust temperature signal for maximum value of...

Page 56: ...g minimum value of 4 00 0 01mA 5 If DMM is reading out of tolerance use or to adjust VELTRON DPT plus output for an acceptable DMM reading Depending on DMM s selected range the or button may need to be pressed and held for a period of time before any change occurs in the DMM s display To speed up changes in output pushbutton combinations can be used The following chart lists these combinations alo...

Page 57: ...n 8 With DMM still connected as in Step 4 reading should be at maximum value of 20 00 0 01mA 9 If DMM is reading out of tolerance use or to adjust VELTRON DPT plus output for an acceptable DMM reading 10 Once an acceptable span reading is obtained press and then and display will indicate Output 2 Zero 11 Repeat Steps 3 through 10 for Analog Output 2 12 Press until display indicates Return to MAIN ...

Page 58: ...ific installation Operating experience should be used to set frequency of specific types of maintenance 7 1 CLEANLINESS Verify condensation or other sources of liquids are not present inside the VELTRON DPT plus 7 2 MECHANICAL Verify pressure signal connections are secure Inspect pressure signal lines for any cracks or leaks Verify mounting hardware is secure 7 3 ELECTRICAL Periodically inspect al...

Page 59: ...alibration see Section 6 Verify pressure signal lines are connected correctly Verify AUTO zero valve switch is in the OFF position Check for leaky or obstructed lines between VELTRON DPT plus and process sensor Check for kinked internal signal pressure lines in transmitter base Verify AUTO zero is ON and interval is properly set see Section 5 9 Verify AUTO zero valve switch is in the OFF position ...

Page 60: ...omponents 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 at Phone 1 707 544 2706 Fax 1 707 526 2825 1 800 AIRFLOW When contacting the Customer Service Department about parts please have the applicable Factory Set Up Information sheet available for reference ...

Page 61: ...ot possible ensure equipment is packaged sufficiently to protect it during shipment CAUTION All damage occurring during transit is the Customer s responsibility List the Return Authorization R A number on the packing list and clearly mark this number on the outside of each shipping container Costs associated with return of equipment to Air Monitor are the customer s responsibility regardless wheth...

Page 62: ...VELTRON DPT plus Air Monitor Corporation 116 010 91 P65 09 18 09 VELTRON DPT plus IO M Manual 57 APPENDIX A APPENDIXA FACTORY SET UP SHEETS provided separately with the transmitter ...

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