Omega FDT-25W, Руководство пользователя, Страница: 6 / 40

FDT-25W Wall Mounter Ultrasonic Flowmeter
4
Where
θ is the include angle to the flow direction
M is the travel times of the ultrasonic beam
D is the pipe diameter
Tup is the time for the beam from upstream transducer to the downstream one
Tdown is the time for the beam from downstream transducer to the upstream one
ΔT=Tup –Tdown
1.4 Optional transducer
 STD-WS Standard Clamp on transducer small, pipe size DN15 to DN100 (3/4” to 4”)
 STD-HM Standard Clamp on transducer medium, pipe size DN50 to DN700 (2” to 28”)

STD-HL
Standard Clamp on transducer large, pipe size DN300 to DN6000 (12” to 240”)
 HT-HS High Temp Clamp on transducer small, pipe size DN15 to DN100 (3/4” to 4”)
 HT-HM High Temp Clamp on transducer medium, pipe size DN50 to DN700 (2” to 28”)
 HT-HL High Temp Clamp on transducer large, pipe size DN300 to DN6000 (12” to 240”)
1.5 Typical application
The wall-mounting flow meter can be applied to a wide range of pipe flow measurements. Applicable
liquids include pure liquids as well as liquid with small quantity of tiny particles.
Examples are:

Water (hot water, chilled water, city water, sea water, waste water, etc.);

Sewage with small particle content;

Oil (crude oil, lubricating oil, diesel oil, fuel oil, etc.);

Chemicals (alcohol, acids, etc.);

Plant effluent;

Beverage, liquid food;

Ultra-pure liquids;

Solvents and other liquids
Downstream transducer
spacing
flow
Upstream transducer
Tdown
Tup
θ
down up
T T
T MD
V


 

2 sin