Flowmetering Target flowmeters 3
Performance The TFA flowmeter has inbuilt electronics which give a density compensated output. The LCD display is incorporated within the electronics head and can show totaliser, flowrate, power, pressure and temperature. An M750 display unit can be used to provide a remote display function if required, utilising the 4 - 20 mA output. System uncertainty, to 95% confidence (2 STD): (in accordance with ISO 17025)
± 2% of measured value from ≥ 20% and ≤ 100% of maximum rated flow ± 2% of full-scale value from ≥ 10% and < 20% of maximum rated flow Turndown : up to 10:1
As the TFA flowmeter is a self contained unit, the uncertainty quoted is for the complete system. Many flowmeters claim a pipeline unit uncertainty but for a true system uncertainty, the individual uncertainty values of any associated equipment, such as DP cells, need to be added to the pipeline value.
Pressure/temperature limits
Pressure psi g
300
100
400
0
200
239 200 150 100 50 0
100 200 300 400
3.3 8
Steam saturation curve
30 32
0.6
5
15
20
10
25
Pressure bar g
The product should not be used in this region due to software limitations.
Maximum design pressure
32 bar g @ 239 °C
(464 psi g @ 462 °F)
Maximum design temperature
239 °C
(462 °F)
32 ° F (non-freezing)
Minimum design temperature
0 °C (non-freezing)
Horizontal flow
32 bar g @ 239 °C
(464 psi g @ 462 °F)
Maximum operating pressure *
Vertical flow (101 psi g @ 338 °F * Note: See the Installation and Maintenance Instructions supplied with the TFA (IM-P193-02 and IM-P193-03) for full operation restrictions Minimum operating pressure 0.6 bar g (8.7 psi g) Maximum operating temperature (saturation) 239 °C (462 °F) Maximum electronics ambient temperature 55 °C (131 °F) Maximum electronics humidity level 90% RH (non-condensing) 90% RH (non-condensing) Designed for a maximum cold hydraulic test pressure of 52 bar g (754 psi g) 7 bar g @ 170 °C
Page 2 of 5
TI-P193-01 MI Issue 4
TFA Flowmeter for Saturated Steam Service
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