EI QVT User manual

Phone:(910) 392‐2490
Fax: (910) 392‐2123
416 Landmark 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.

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Phone:(910) 392‐2490
Fax: (910) 392‐2123
416 Landmark Drive
Wilmington, NC 28412 www.easterninstruments.com
TABLE OF CONTENTS
SAFETY
Safe Operaon................................................................................................................. 3
INTRODUCTION
The QVT Mulvariable Transmier................................................................................ 4
GETTING TO KNOW THE QVT
Exploded View of the QVT Transmier.......................................................................... 5
QVT Transmier Schemac............................................................................................ 6
Close‐Up of the IO Board ‐Wiring Terminals ................................................................. 7
Close‐Up of the Processor Board/LCD Board ................................................................. 7
QUICK START UP GUIDE ........................................................................................................... 8
BOOT SEQUENCE ...................................................................................................................... 9
MECHANICAL 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 (Electronic Full Scale) ...................................................................... 28
Changing the Units of Measure .................................................................................... 29
Zero DP1 Differenal Pressure Measurement ............................................................. 30
Zero Process Temperature............................................................................................ 32
Revert to Factory Sengs (Factory Restore) ............................................................... 34
QVT SPECIFICATIONS.............................................................................................................. 35
DIMENSIONAL DRAWINGS..................................................................................................... 39

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Phone:(910) 392‐2490
Fax: (910) 392‐2123
416 Landmark Drive
Wilmington, NC 28412 www.easterninstruments.com
PLEASE READ BEFORE OPERATING YOUR NEW MULTIVARIABLE TRANSMITTER
 For personal/system safety as well as for opmum performance reasons, please read and
understand this manual before working with the transmier.
 Check for damaged parts before operang the transmier. Any damaged part should be
properly repaired or replaced by trained personnel. Do not operate the transmier if any
component does not appear to be funconing correctly. Contact Eastern Instruments for
assistance or for repair components.
 Ensure that only trained personnel perform installaon of the transmier.
 Ensure 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‐
stallaon error could cause high voltage to be present on the transmier leads and termi‐
nals. Electrical shock could cause serious injury or death.
 Use only replacement components or installaon bolts supplied by Eastern Instruments as
non‐approved components or installaon hardware may render the transmier danger‐
ous and could lead to serious injury or death.
 For Technical Assistance, please contact us:
Eastern Instruments
416 Landmark Drive
Wilmington, NC 28412
SAFETY
SAFE OPERATION

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Phone:(910) 392‐2490
Fax: (910) 392‐2123
416 Landmark Drive
Wilmington, NC 28412 www.easterninstruments.com
THE QVT MULTIVARIABLE TRANSMITTER
The QVTTM Mulvariable Transmier from Eastern Instruments is a Smart Transmier that can
be used for the accurate measurement of up to four separate process variables including
Differenal Pressure, Temperature and Absolute Pressure. When coupled with any DP based
flow measurement element, the QVTTM will calculate the fully compensated mass flow of air/
gas travelling through any process which is at or near atmospheric pressure (5 ‐25 psia). The
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 mass flow rate and will give an output proporonal
to this compensated mass flow rate via a 4‐20 mA signal. Please note that the 4‐20 mA signal
can be fully compensated (live measurement of DP, AP and Temperature), parally compen‐
sated (live measurement of DP only) or the values for the Process Variables (DP, AP or Tem‐
perature) can be output via the 4‐20 mA signal as well.
INTRODUCTION

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Phone:(910) 392‐2490
Fax: (910) 392‐2123
416 Landmark Drive
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Exploded View of QVT Transmier
GETTING TO KNOW THE QVT

6
Phone:(910) 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)

7
Phone:(910) 392‐2490
Fax: (910) 392‐2123
416 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

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Phone:(910) 392‐2490
Fax: (910) 392‐2123
416 Landmark Drive
Wilmington, NC 28412 www.easterninstruments.com
VERIFY PROPER MECHANICAL INSTALLATION
 Verify that the QVT is properly mounted (See “Mechanical Installaon: Mounng
the QVT” secon of the QVT I&O Manual for Addional Info)
 Verify that the High and Low Ports of your flow element are properly tubed to the
transmier/manifold/purge system (See “Tubing the QVT” secon of the QVT I&O
Manual for Addional Info)
VERIFY PROPER WIRING OF THE QVT
 Verify 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 Differenal Pressure Measurement” secon of the
QVT I&O Manual for Addional Info)
VERIFY COMMUNICATION (4‐20 mA OUTPUT)
 Compare the readings on your PLC/DCS with the values of the output variable
shown of the QVT screen. (Example: 0 lb/hr on the QVT would equate to 4 mA of
output)
QUICK START UP GUIDE

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Phone:(910) 392‐2490
Fax: (910) 392‐2123
416 Landmark Drive
Wilmington, NC 28412 www.easterninstruments.com
Aer powering on the QVT, the transmier will proceed through a boot sequence followed by
an automated scrolling of key values and sengs within the QVT.
BOOT SEQUENCE
AUTO SCROLL SEQUENCE
Manual Scrolling of the displays shown in the Auto Scroll Sequence is possible by pressing the
“PRG” Buon repeatedly unl the desired 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 Sequence will begin.
Each value will be shown
sequenally for 1.5 seconds
each. Upon compleon, the
sequence will start over
again automacally.
dP Display
Temperature Display 4-20 mA Full ScaleMass Flow Display
AP Display

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Phone:(910) 392‐2490
Fax: (910) 392‐2123
416 Landmark Drive
Wilmington, NC 28412 www.easterninstruments.com
MECHANICAL INSTALLATION: MOUNTING THE QVT
The QVT can either be mounted via an oponal mounng bracket which allows the transmier
to be mounted to either a vercal or horizontal 2” pipe, or, if the transmier is purchased with
flow elements from Eastern Instruments, the transmier will be mounted directly to the flow
element (VAP Pitots, DSV Duct Secon or HBP High Beta Flow Condioner). Detailed dimen‐
sional drawings are included within this secon of the manual. 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 Bracket for QVT: Panel Mount Mount Bracket for QVT w/ Manifold: Panel Mount
5/16” x 1.75” Bolt For
QVT Mounng
1 1/2” Size U‐Bolt
For Pipe Mounng
1 1/2” Size U‐Bolt
For Pipe Mounng
M8 x 1.25 For Transmier
Manifold Mounng
5/16” x 1.75” Bolt For
QVT Mounng
5/16” x 1.75” Bolt For
Panel Mounng
M8 x 1.25 For Transmier
Manifold Mounng
5/16” x 1.75” Bolt For
Panel Mounng

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Phone:(910) 392‐2490
Fax: (910) 392‐2123
416 Landmark Drive
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Vercal Pipe Mount ‐Transmier Only
Horizontal Pipe Mount ‐Transmier Only

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Phone:(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

13
Phone:(910) 392‐2490
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

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Phone:(910) 392‐2490
Fax: (910) 392‐2123
416 Landmark Drive
Wilmington, NC 28412 www.easterninstruments.com
TUBING THE QVT
Process Connecons are made to the boom of the QVT via 1/4” NPT female connecons on 2
1/8” Centers. Please note that if the oponal 3‐Way Valve or the Purge System were pur‐
chased, the Process Connecons will vary. These connecons can be modified to accept mani‐
folds on 2”, 2 1/8” and 2 1/4” centers by using 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 will differ depending on whether you are connecng directly
to the QVT, via a 3‐way valve or via the TMP transmier purge. The connecons for each of
these three scenarios are illustrated below.
QVT Transmier Process Connecons

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Fax: (910) 392‐2123
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QVT Transmier with 3‐Way Valve Process Connecons
QVT Transmier with 3‐Way Valve and TMP Purge System Process Connecons

16
Phone:(910) 392‐2490
Fax: (910) 392‐2123
416 Landmark Drive
Wilmington, NC 28412 www.easterninstruments.com
ELECTRICAL INSTALLATION
ACCESSING THE WIRING CONNECTORS OF THE QVT
NOTE: POWER MUST BE OFF BEFORE REMOVING
THE COVER OF THE QVT!
REMOVING THE LCD BOARD
1. Once power has been turned offto the trans‐
mier, remove the cover to expose the Processor
Board or LCD Circuit Board. Once the cover has
been removed, your QVT should look similar to
the picture #1 on the right.
2. Remove the Processor Board or LCD Circuit
Board. To remove the board, press on the
boom and pull out at 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. Please note that the Board has four holes and
there are only two Board Snap Mounts. This ena‐
bles the board to be rotated to any of four posi‐
ons depending on the desired orientaon of the
LCD screen. Please see picture #5 for reference.
4. Check the wiring to ensure that the internal wir‐
ing clears prior to snapping the board into place.
5. Replace the cover of the QVT.
#1
#2
#3
#4
#5

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Phone:(910) 392‐2490
Fax: (910) 392‐2123
416 Landmark Drive
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USING THE WIRING CONNECTORS
Male Locking Latch
Electrolyc Copper (E‐Cu)
Tin‐Plated Contact Bridge
Female Locking Latch
Gripping Plate with
Sliding Connector Release
Straight or Angled, E‐CU, n‐plated
solder pins for both wave and THR soldering
Push‐Buon
Test Port
High‐Alloy Stainless Steel (CrNi)
Clamping Spring
Original Size:
3.5 mm Pin Spacing
Male Header
Female Connector Wire 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 Conductors
from Connector
To Insert: Using the supplied screwdriver,
press down on the Push Buon and insert
the wire into the terminal.
To Remove: Press the Push Buon and
pull upwards on the wire to remove the
wire from the Female Connector.
Push‐Buon
Insert Wire
Here
Included
Screwdriver

18
Phone:(910) 392‐2490
Fax: (910) 392‐2123
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WIRING THE QVT
There are two parts to wiring the QVT. For all versions of the QVT, 4‐20 mA loop power must
be supplied. For mulvariable transmiers in which Process Temperature will be measured,
an RTD must also be wired to the QVT. The wiring connecons for both the 4‐20 mA loop
power and the RTD inputs are located behind the LCD circuit board inside the head of the
transmier. Once the LCD Board has been removed, the connectors for both the 4‐20 mA
loop 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 POWER AFTER THE LCD BOARD HAS BEEN RETURNED TO ITS PLACE!
Please note the color indicators at the boom of the customer connecon wiring terminals
for both the 4‐20 mA Connector and the RTD Connector. The following pages offer a more
detailed descripon of the proper wiring for each of these connecons.
The 4‐20 mA Connector The RTD Connector
Board Snap Mounts

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4‐20 MA LOOP POWER:
An example of loop wiring is shown below. We have assumed that we used 5000 feet of
Belden 88760 twisted, 18 AWG shielded pair, 7.5 ohm/1000 conductor. The Receiver and A/
D data logger both have a 250 Ωresistor. The power supply is assumed to be a +/‐10%, 24 vDC
source, with the negave terminal grounded, which is shared with other loops. The minimum
voltage expected is the 24 x 0.9 = 21.6 v DC. NOTE: POWER SUPPLY SHOULD BE A GOOD
QUALITY ISOLATED POWER 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 (R2012) as
shown in the sketch (right) and is
assumed to have the negave terminal
of the power supply grounded.
Typical Calculaon Based on 5,000 feet of Cable
Descripon Length () Ω/ΩmA FS Volt Drop
Transmier Minimum Drop 8.8
Posive Cond. 5000 0.0075 37.5 20 0.75
Negave Cond. 5000 0.0075 37.5 20 0.75
Loop Powered Receiver 250 20 5
A/D Data Logger 250 20 5
Total 575 20.3

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Phone:(910) 392‐2490
Fax: (910) 392‐2123
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Be sure to check your load resistance in the output current loop as too high a load resistance
will cause malfuncon or incorrect operaon of the QVT transmier. Below are two methods
of determining whether the load resistance exceeds the allowable operaonal limit.
Voltage Drop: The minimum transmier voltage as seen in the chart below, is 8.8 V. The re‐
sistance values of the conducve elements 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 resistance total intersects the supply voltage in the below graph. Compare the value
for supply voltage that you found on the graph with your minimum power supply voltage. If
the value from the chart is lower than the minimum power supply voltage, the load is OK.
Load Resistance, OHM
Supply Voltage, vDC