Materials Handling

Reliable LS20B Propeller Type Current Meter for Hydrological Field

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Specifications:

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1 The?Rotary?Diameter?for?Propeller:?Ф60mm

2 The?Hydraulic?Thread?Pitch?for?Propeller:?H=120mm

3 Minimum?Velocity:?Vo≤0.06m/s(Normal)

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Vo≤0.05m/s(Premium)

4 Measuring?Range:?0.07～7m/s(Normal)

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?0.05～7m/s(Premium)

5 Operational?Depth:?0.1～1.2m(Wading?rod)

6 Accuracy:unbiased?variance:?m≤±1.2%(Normal)

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? m≤±1.0%(Premium)

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? V<0.2m/s:

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Relative?Error:σ≤±5%

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Description:

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Portable?velocity?flow?meter?is?composed?of?spin?paddle?velocity?sensor?(?or?

other?type?spin?cup?and?screw?propeller?velocity?apparatus),?HT?type?velocity?

flow?meter?and?0.4?m?x?4?Ф?16?measuring?bar.?Full?set?of?instruments?are?in?the?

aluminum-alloy?password?boxes.?When?using,?you?can?assemble?it?as?a?body?and?

connect?the?signal?line,?then?the?velocity?of?every?open?channel?can?be?measured.?

And?it?can?automatically?display?the?velocity?and?preset?the?flow?of?sectional?areas.

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Applications:

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LS20B?type?propeller?flowmeter?is?a?kind?of?large?range?hydrological?flowmeter,?

which?is?applicable?to?measure?high,?medium,?and?low?flow?rate?of?rivers,?lakes,?

channels,?reservoirs?and?so?on.?It?can?also?be?used?for?measuring?high?speed?or?

ultrahigh?speed?flow?rate?in?pressure?pipe?of?power?station?and?some?scientific?

experiment.?

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Measuring?principles:

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This?instrument?is?designed?based?on?the?theory?of?areas?of?open?channel’s?velocity.

After?measuring?the?velocity,?the?flow?can?be?get:Q=V·S(S?is?sectional?area)

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Velocity?measurement

When?measuring?velocity,?the?spin?paddle?type?rotor?flow?meter?will?be?pushed?by?

waterpower.?The?built-in?signal?apparatus?produces?RPM?signal.?The?formula?

below?can?calculate?velocity:????????

(K/b)N

?????????????????V＝—————-??＋??C/a(m/s)

?????????????????????????T

V:?the?average?velocity?(m/s)

B/K:the?waterpower?pitch?of?blades?

a/C:?velocity?constant

T:?lasting?time(the?unit?is?s)

N:?the?number?of?signals?in?T?time?

S:?sectional?area

Q:?flow

K/b,?C/a?are?constants

When?measuring,?you?can?setT?and?then?measure?N,?so?the?velocity?and?flow?can?

be?automatically?calculated.

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Competitive?Advantage:

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1)Especially?extensive?speed?measurement?range,one?propeller?can?satisfy?

different?measurement?requirements.

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2)The?propeller?adopts?imported?high?quality?engineering?plastics

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3)Low-speed?performance—internal?friction?characteristic.

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4)Flexible?installment?manner?and?reasonable?directional?device?structure?can?

adapt?direction?of?current.

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5)Fine?structure?intensity?makes?installment?and?support?firm?and?can?stand?

15m/s?high?flow?rate?impact.

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6)Streamline?overall?and?built-in?type?empennage?counter?weight?reduces?water?

resistance.No?additional?deflection?moment.

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Online operation of computer (available if mentioned in your order)

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Connect current meter with communication interface by exclusive communication cable,

open computer to enter WINDOWS－Program－Accessories－Communication－Hyperterminal,

set Baud rate to 2400,communication bit to 8,pause bit to 1,parity check to none,flow control

to software, choose correct communication interface, connect signal wire of meter, input “v”, it

will send out 99 storage data to computer screen automatically.

K=7800 C=0.050 T=0106.5 N=0015 V=0.160

K=7800 C=0.050 T=0108.4 N=0016 V=0.165

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Package



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