Materials Handling
Description
Reliable LS20B Propeller Type Current Meter for Hydrological Field
?
?
Specifications:
?
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%
?
?
?
Description:
?
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.
?
?
?
Applications:
?
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.?
?
?
?
Measuring?principles:
?
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)
?
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.
?
?
Competitive?Advantage:
?
1)Especially?extensive?speed?measurement?range,one?propeller?can?satisfy?
different?measurement?requirements.
?
2)The?propeller?adopts?imported?high?quality?engineering?plastics
?
3)Low-speed?performance—internal?friction?characteristic.
?
4)Flexible?installment?manner?and?reasonable?directional?device?structure?can?
adapt?direction?of?current.
?
5)Fine?structure?intensity?makes?installment?and?support?firm?and?can?stand?
15m/s?high?flow?rate?impact.
?
6)Streamline?overall?and?built-in?type?empennage?counter?weight?reduces?water?
resistance.No?additional?deflection?moment.
?
?
Online operation of computer (available if mentioned in your order)
?
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
?
?
?
Package
?
Read More
Nanjing Metlan Measurement & Control Instrument Co., Ltd
Electromagnetic Flow Meter,Vortex Flow Meter,Turbine Flow Meter
Address: No.12, Rungu Road, Guli Industrial Zone, Jiangning District,
Nanjing, Jiangsu
China, 210000
Tel: 86-025-53266120
Fax: 86-025-52899138
