4
Phone:(910) 392
‐
2490
Fax: (910) 392
‐
2123
416 Landmark Drive
Wilmington, NC 28412
www.easterninstruments.com
THE QVT MULTIVARIABLE TRANSMITTER
The QVT
TM
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
Di
ff
eren al Pressure, Temperature and Absolute Pressure. When coupled with any DP based
fl
ow measurement element, the QVT
TM
will calculate the fully compensated mass
fl
ow 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 Di
ff
eren al Pressure and Absolute Pressure from a coupled
fl
ow element. The
QVT will be as accurate whether coupled with an Eastern Instruments
fl
ow element or wheth
‐
er it is coupled with a
fl
ow element from the manufacturer of your choosing. Using these in
‐
puts, the QVT will calculate a compensated mass
fl
ow rate and will give an output propor onal
to this compensated mass
fl
ow 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