EI QVT Installation & Operation Manual Download

Page: 38 / 41

Phone:(910) 392

‐

2490

Fax: (910) 392

‐

2123

416 Landmark Drive
Wilmington, NC 28412

www.easterninstruments.com

‐

20 mA OUTPUT

Zero and Span Adjustment

Zero and Span can be set anywhere within the range of the sensors listed. The 2

‐

wire 4

‐

20 mA

output is user

‐

selectable for either a standard square root output (0.5 power) or for Eastern

Instruments’ modi

ed power output (0.455 power).

Accuracy: +/

‐

0.05% Full Scale (

‐

to 70

Power Supply: Loop Power Required

Supply Voltage Range: 8.8 to 42.5 Vdc

Power Supply E

ﬀ

ect: Negligible

Maximum load resistance is determined by the voltage level of the external power supply as
described in the graph (right):

Load

Resi

stan

, OHM

Supply Voltage, vDC

Summary of Contents for QVT

Page 1: ...dmark Drive Wilmington NC 28412 www easterninstruments com QVT MULTIVARIABLE TRANSMITTER QVT INSTALLATION OPERATION MANUAL REV 8 22 REVISION VERSION 1 0 51 ORIGINAL LANGUAGE Copyright 2022 Eastern Instrument Laboratories Inc All Rights Reserved ...

Page 2: ...CAL INSTALLATION Mechanical Installa on Moun ng the QVT 10 Tubing the QVT 14 ELECTRICAL INSTALLATION Accessing the Wiring Connectors of the QVT 16 Using the Wiring Connectors 17 Wiring the QVT 18 4 20 mA Loop Power 19 RTD Temperature Sensor Input 21 OPTIONS Purge System Op onal 23 Using the 3 Way Valve 25 GETTING TO KNOW YOUR LCD SCREEN 26 PROCEDURES Changing the Ae Number 27 Changing the EFS Elec...

Page 3: ...that assembly of the transmi er to a flange or manifold of some kind is done properly as improper assembly could lead to damage of the sensors of the transmi er or could render the transmi er dangerous Failure to follow the installa on guidelines with in this manual could cause serious injury or death If the transmi er is installed in a high voltage environment it is possible that a fault or in st...

Page 4: ...e QVT will accept a Process Temperature signal from an external RTD and will simultaneously measure the Diﬀeren al Pressure and Absolute Pressure from a coupled flow element The QVT will be as accurate whether coupled with an Eastern Instruments flow element or wheth er it is coupled with a flow element from the manufacturer of your choosing Using these in puts the QVT will calculate a compensated...

Page 5: ...5 Phone 910 392 2490 Fax 910 392 2123 416 Landmark Drive Wilmington NC 28412 www easterninstruments com Exploded View of QVT Transmi er GETTING TO KNOW THE QVT ...

Page 6: ...10 392 2490 Fax 910 392 2123 416 Landmark Drive Wilmington NC 28412 www easterninstruments com QVT Transmi er Schema c Shown with op onal 3 Valve Manifold and Purge System 3 Valve Manifold Recommended Accessory ...

Page 7: ... Landmark Drive Wilmington NC 28412 www easterninstruments com Close up of the IO Board Wiring Terminals Close up of the Processor Board LCD Board The 4 20 mA Connector The RTD Connector Board Snap Mounts Snap Moun ng Holes Snap Moun ng Holes ...

Page 8: ...rify that the proper power has been supplied to the QVT See Wiring the QVT 4 20 mA Loop Power sec on of the QVT I O Manual for Addi onal Info If using an RTD to measure the process temperature verify that the RTD is properly wired See Wiring the QVT RTD Temperature Sensor Input sec on of the QVT I O Manual for Addi onal Info PERFORM ZERO OF THE DP1 DIFFERENTIAL PRESSURE See Procedures Zero DP1 Diﬀ...

Page 9: ...ired display is shown The display will be shown for ap proximately 2 hrs before returning to the Auto Scroll Sequence BOOT SEQUENCE Upon Boot Reboot the so ware version le will be displayed followed by a Pass Fail screen deno ng whether the so ware has loaded properly right Up on a successful Boot Pass the Auto Scroll Sequence below will begin Upon a successful Boot Se quence Above the Auto Scroll...

Page 10: ...al The suggested installa on lo ca on depends upon the process but in general for air and gas flow measurement the trans mi er is suggested to be located above the tap for the air gas flow measurement so that con densate that may collect in the impulse lines can drain away from the transmi er MECHANICAL INSTALLATION Mount Bracket for QVT Pipe Mount Mount Bracket for QVT w Manifold Pipe Mount Mount...

Page 11: ...11 Phone 910 392 2490 Fax 910 392 2123 416 Landmark Drive Wilmington NC 28412 www easterninstruments com Ver cal Pipe Mount Transmi er Only Horizontal Pipe Mount Transmi er Only ...

Page 12: ... 910 392 2490 Fax 910 392 2123 416 Landmark Drive Wilmington NC 28412 www easterninstruments com Ver cal Pipe Mount Transmi er and 3 Way Valve Manifold Horizontal Pipe Mount Transmi er and 3 Way Valve Manifold ...

Page 13: ... Fax 910 392 2123 416 Landmark Drive Wilmington NC 28412 www easterninstruments com Ver cal Pipe Mount Transmi er 3 Way Valve Manifold and Purge System Horizontal Pipe Mount Transmi er 3 Way Valve Manifold and Purge System ...

Page 14: ...ing an op onal adapter flange It is recommended that the tubing used to connect the QVT to your flow element be at least 3 8 hard walled Stainless Steel or Copper Pipe if using the op onal Purge System Please see the accompanying table in the Purge System sec on of this manual for specifics on the rec ommended diameter of tubing versus the run length of the pipe Please note that the connec ons wil...

Page 15: ...392 2490 Fax 910 392 2123 416 Landmark Drive Wilmington NC 28412 www easterninstruments com QVT Transmi er with 3 Way Valve Process Connec ons QVT Transmi er with 3 Way Valve and TMP Purge System Process Connec ons ...

Page 16: ...the top behind the circuit board as seen in picture 2 DO NOT PULL ON THE OVERLAY AS IT COULD BE DAMAGED 3 Carefully remove the board as shown in picture 3 REPLACING THE LCD BOARD 1 Align the Board Snap Mounts with the Snap Moun ng Holes on the LCD Board 2 With fingers over the snap mounts press the board into place as in picture 4 The Board Snap Mounts should snap into the Snap Moun ng Holes 3 Ple...

Page 17: ... Gauge 24 14 AWG Strip Length 8 9 mm Gripping Plate Sliding Connector Release Connec ng Disconnec ng Male Header and Female Connector To Disconnect Press down on the Sliding Connector Release towards the Male Head er and pull on the Gripping Plate to release Female Connector from Male Header To Connect Push the Female Connector into the Male Header un l you hear a click Inser ng and Removing Condu...

Page 18: ...oop power and the RTD can be wired You can wire the connectors by either removing the female connector from the board adding the wire externally and replacing the female con nector into the male header already wired or you can leave the female connector seated in the male header and wire it in place or internally NOTE ALWAYS REMOVE POWER TO THE QVT BEFORE REMOVING THE LCD BOARD AND ON LY RESTORE P...

Page 19: ...R SUPPLY LOOP POWERED RECEIVER The internal connector s polarity is color coded as shown SIGNAL COMMON QVT Transmi er 24 vDC POWER 5000 A D System The Shield is grounded only on the power supply end QVT Transmi er POWER SUPPLY RECEIVER IN SERIES OR PARALLEL Type 2 2 Wire Circuit SIGNAL COMMON The 4 20 mA loop transmi er in the QVT is a TYPE 2 2 Wire Circuit as defined in ANSI ISA 50 00 01 1975 R20...

Page 20: ...ements are mul plied by the current to give the voltage drop of each element Sum the voltage drops for all conduc ve elements along with the mini mum transmi er voltage and compare that value with the minimum power supply voltage If the total is less than the minimum power supply voltage the load is OK Summing Resistances Sum the resistances of all circuit elements Find where the total summed resi...

Page 21: ... Shield must be grounded to the housing or head of the RTD which in turn must be grounded DO NOT GROUND THE SHIELD TO THE QVT TRANSMITTER Although the QVT RTD input cancels lead resistance it is best to use the minimum lead re sistance in case they are unequal It is highly recommended to connect to ground the Shield of longer cables typically greater than 10 feet in length TYPICAL 3 WIRE RTD INSTA...

Page 22: ...er nate between the RTD s fault display Image 1 and the Entered Temperature value that will be used to calculate the mass flow for the 4 20 mA output Image 2 When the RTD has faulted and the Entered Temperature value is being used the Tempera ture Icon T will flash when displaying the Entered value This is an indica on that the Entered value is being used to calculate mass flow rather than the RTD...

Page 23: ... NPT fi ngs When dry instrument air is used for the purge freeze protec on is aﬀorded to the impulse lines down to the dew point of the instrument air The purge flow is based on the impulse line length and diameter between the pitots and the transmi er see Table 2 below Also this type of purge can prevent hazardous or corrosive gasses from migra ng from the measured gas to the external impulse lin...

Page 24: ...lse line to the High connec on port and the Low impulse line to the Low connec on port of the TMP These are 1 2 FNPT connec ons and re quire swage type compression fi ngs and the appropriate thread sealant Now is a good me to leak check all connec ons All connec ons must be free from leaks and bubble ght to ensure proper func on of the TMP and the impulse lines Supply air can now be connected to t...

Page 25: ...hat the High and Low sides are separated Finally open the Low Pressure Isola on Block to establish the working Diﬀeren al Pressure FIGURE 2 NORMAL OPERATION Under normal opera on the three way valve will be oriented so that the two isola on valves will be open and the Equaliza on Valve will be closed This will ensure that the High Pressure Isola on Valve and the Low Pressure Isola on Valve will no...

Page 26: ... display screens The screen dis plays are listed below DP1 Diﬀeren al Pressure example in WC AP Absolute Pressure example in WC T Process Temperature example Deg F Q Process Flow example lb hr EFS Electronics Full Scale example lb hr NOTE Pressing the Program Bu on will allow you to manually cycle through the diﬀerent screens above NOTE The screen which currently displays the Process Variable Grap...

Page 27: ...s to the QVT that a selec on has been made and it will automa cally transi on to the next step in the process 5 A er 10 seconds the confirma on screen will be displayed Please see screen 3 6 Press Zero Bu on to Confirm Program Bu on to Disregard The Program Bu on will disregard the changes and will revert your Ae number to the previously selected value The Zero Bu on will confirm your new Ae numbe...

Page 28: ...am Zero Bu on un l the desired value for the EFS number is displayed Pressing the Program Bu on will de crease the EFS number while Pressing the Zero Bu on will in crease the EFS number Pressing and holding either bu on will increase the rate at which the numbers increase decrease 4 Once the correct value is displayed wait 10 seconds Wai ng for this dura on signals to the QVT that a selec on has b...

Page 29: ...ce again x2 4 Press the Zero Bu on twice again x2 You should now see your unit selec on flash ing on the screen example to the right 5 You can now select your units Cycle through your choices listed below using the Program Bu on 6 Once you have selected your units press the Zero Bu on to Save your units You will be asked if the selected units are OK Press the Zero Bu on again to confirm your selec...

Page 30: ...Port Valve The pres sure between the ports should now be equalized and the Diﬀeren al Pressure between them should be 0 Please note when returning to typical opera on you must first open the Low Port Valve then close the Equaliza on Valve and finally reopen the High Port Valve to ensure no damage to the QVT Performing a Zero for DP1 1 Press the Program Bu on un l the DP1 Diﬀeren al Pressure screen...

Page 31: ...al Pressure is outside this range and the Zero Procedure is a empted the Procedure will Fail and this failure will be signified by flashing between the Failure Screen Screen 1 and the Greater than 0 01 inWC Screen Screen 2 The original zero value will be retained PLEASE NOTE Typically the transmi er will not need to be zeroed unless the zero error ex ceeds 1 part in 1000 of the full scale of the t...

Page 32: ...n damage to the LCD Board and can cause failure of the QVT 2 Remove the QVT Cover 3 Remove the LCD Board A detailed descrip on of this proce dure can be found in the Electrical Installa on sec on of this manual 4 Looking at the RTD Connector remove the Female Connect or from the Male Header so that the RTD is no longer con nected to the QVT 5 The Temperature Simulator contains a duplicate Female C...

Page 33: ...ce dure can be found in the Electrical Installa on sec on of this manual 7 Looking at the RTD Connector remove the Temperature Simulator from the Male Header 8 Replace the Female Connector of the RTD live process into the RTD Connector s Male Header 9 Replace the LCD Board and QVT Cover 10 Return power to the QVT The zero will not be changed in regards to the QVT s output un l the Zero Procedure h...

Page 34: ...func on will me out at which point you will need to wait 10 seconds before retrying the bu on sequence Pressing the above bu ons at one second increments will ini ate a se ries of display screens that will show each of the factory se ngs These screens will rotate at three second intervals un l the final screen is dis played The final screen displaying Fact for factory se ngs will be flashing In or...

Page 35: ...35 Phone 910 392 2490 Fax 910 392 2123 416 Landmark Drive Wilmington NC 28412 www easterninstruments com QVT SPECIFICATIONS MEASURED VARIABLE SENSOR PERFORMANCE ...

Page 36: ...36 Phone 910 392 2490 Fax 910 392 2123 416 Landmark Drive Wilmington NC 28412 www easterninstruments com MEASURED VARIABLE SENSOR PERFORMANCE ...

Page 37: ...37 Phone 910 392 2490 Fax 910 392 2123 416 Landmark Drive Wilmington NC 28412 www easterninstruments com SENSOR LIMITS ...

Page 38: ...A output is user selectable for either a standard square root output 0 5 power or for Eastern Instruments modified power output 0 455 power Accuracy 0 05 Full Scale 40o to 70o C Power Supply Loop Power Required Supply Voltage Range 8 8 to 42 5 Vdc Power Supply Eﬀect Negligible Maximum load resistance is determined by the voltage level of the external power supply as described in the graph right Lo...

Page 39: ...39 Phone 910 392 2490 Fax 910 392 2123 416 Landmark Drive Wilmington NC 28412 www easterninstruments com DIMENTIONAL DRAWINGS QVT TRANSMITTER ...

Page 40: ...40 Phone 910 392 2490 Fax 910 392 2123 416 Landmark Drive Wilmington NC 28412 www easterninstruments com QVT TRANSMITTER WITH 3 WAY VALVE ...

Page 41: ...41 Phone 910 392 2490 Fax 910 392 2123 416 Landmark Drive Wilmington NC 28412 www easterninstruments com QVT TRANSMITTER WITH 3 WAY VALVE AND PURGE ...

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