QVT Multivariable Transmitter for Air Flow Measurement: Spec Sheet
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QVT™ Multivariable Transmitter The QVT™ Multivariable Transmitter from Eastern Instruments is a Smart Transmitter that can be used for the accurate measurement of up to four separate process variables including Differential Pressure, Temperature and Absolute Pressure. When coupled with any DP based flow measurement element, the QVT 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 is uniquely designed for high accuracy at ultra low DP ranges and can accurately measure differential pressures from 0.001 up to 10 in WC. This broad operating range is unique among multivariable transmitters and allows a single QVT transmitter to replace multiple transmitters when covering this large range. Another feature of the QVT is that its unique process seal requires no diaphragm seal. Diaphragm seals can often cause inaccuracies in a transmitter’s sensor readings due to condensate. FEATURES AND BENEFITS • Modes of Operation: Multivariable Transmitter (Measurement of two or more of DP, Temperature and Absolute Pressure), DP Transmitter (DP Measurement only) • DP Measurement: Typical Operating Range is 10000:1 (0.001 in WC to 10.0 in WC) measuring Differential Pressure across any primary flow element • AP Measurement: Measurement of Absolute Pressure (integral sensor tied to low port of primary flow element) • Temperature Measurement: Measurement of Temperature via 100 ohm (385) 3-Wire Class A DIN RTD • Process Seal: Our unique method of isolating sensors from the process requires no diaphragm seal and can be further enhanced with a Purge Seal (Low Volume Continuous Purge coupled directly to transmitter) • Flow Accuracy: The accuracy of the flow measurement can be as high as ±0.50% of Reading over 100:1 DP (10:1 flow) range • Rangeability: the span of the 4-20 mA signal corresponding to DP can be ranged from 0 to 0.05 in WC up to 0 to 8 in WC (160:1) • Response Time: Updates flow calculation 10 times a second • Functionality: All measured and calculated variables are available on LCD panel • Output: 4-20 mA Compensated flow output using measured/input values for Differential Pressure, Absolute Pressure and Temperature (Can also be a single variable output only) • Simplicity: Ae and the 4-20 mA full scale value are set from LCD panel’s push buttons • Zero: Differential pressure can be zeroed from the LCD/push button interface • Power Supply: Loop Power 8.8 - 42.5 vDC range • Versatility: LCD can be rotated independently of the head (LCD rotates 270o and head can rotate 180o) for ultimate adjustability M J E A. S X E R I 1>J S X R XJ E X s QVT Quad Variable Flow T

MEASURED VARIABLE SENSOR PERFORMANCEDifferential Pressure SensorSENSOR ACCURACY OVER VARIOUS TEMPERATURE RANGES SENSOR RANGE • Static Pressure Effect: Less than 0.00375% URL over specified operating range (5 - 25 PSI) • Typical Operating Range: 10000:1 (0.001 in WC to 10.0 in WC) at -40o to 70o C (-40 to 160o F) • Minimum Resolution: (1 ct) 0.00007 in WC • Position Effect: Less than 0.00375% URL in any plane • Rangeability: Unipolar (0 - 0.05 to 0 - 8.0 in WC) / Bipolar (+/-0.025 - +/-8.00 in WC) - [4-20 mA Full Scale Range] • Ambient Temperature Effect: 0-50o C Accuracy does not degrade...

Temperature Sensor __SENSOR ACCURACY TEMP. RANGE ACCURACY • Transmitter is compatible with any Class A DIN 100 ohm 385 Platinum RTD Sensor (3 Wire) • Update Rate: 5 times/s without strobing • Minimum Resolution: 0.024o C M J E A. S X E R I P>f S I' K U 1%/I !•: T s QVT Quad Variable Flow Transm

Sensor Range Limits WARRANTY QVTTM Multivariable Transmitter 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' own 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 is negligible Maximum load resistance is determined by the voltage level of the external power supply as described in the graph...

OLE PROPERTY OF HOLE WITHOUT BITED. DIMENSIONAL DRAWINGS HE INFORMATION CONTAINED IN THIS DRAWING IS THE SOLE PROPERTY OF ASTERN INSTRUMENTS ANY REPRODUCTION IN PART OR WHOLE WITHOUT E WRITTEN PERMISSION OF EASTERN INSTRUMENTS IS PROHIBITED. FRONT VIEW SIDE VIEW CUSTOMER HIGH PORTCUSTOMER HIGH PORT 1/4" NPT CONNECTION 1/4" NPT CONNECTION CUSTOMER LOW PORT 1/4" NPT CONNECTION CUSTOMER HIGH PORT 1/4" NPT CONNECTION UNLESS OTHERWISE SPECIFIED GENERAL NOTES: GENERAL NOTES: DIMENSIONS CORNERS. 1. BREAK ALL SHARP EDGES AND1. BREAK ALL SHARP EDGES AND ARE IN IN [MM] CORNERS. TOLERANCES ARE: UNLESS...

MODEL NUMBER TABLE TRAN QVT Quad Variable Flow Transmitter

MODEL NUMBER TABLE CONT'D: Selectable Options for the QVTTM Quad Variable Flow Transmitter. PURGE SEAL ADDITIONAL OPTIONS M J E A. S X E R I S X R XJ TE X s QVT Quad Variable Flow Transmitter