Omega Products FL-100 User Manual

Now Available

COMPUTERIZED

FLOW TABLES

FL-1 00 SERIES, FL-1 10, FL-1 20

FOR OMEGA@

project at Omega Instruments has

A new

produced a new computerized procedure for generating complete fluid of known viscosity and density.

Tables of flow are available for calibrated and correlated flowmeters at every scale divi-

sion from 1 to 100. Similar tables are available for compact

flowmeters at every direct flow reading of scale.

Volume flow rates are given at the

tions

of flow and corrected to volumes

measured at standard conditions.

Each chart for a correlated and calibrated

flowmeter meter and float material.

The flow rate can be given in any units

desired including mass flow.

New correlation method uses complex

lytical maximum accuracy.

Resultant accuracy is at least twice as good

as the best previous correlation developed, namely:

‘he new computerized method is based on

he use of the flow equation given in terms

!xtensive cf

as follows:

is specific to the actual serialized

equations programmed to achieve

Average error =

ever is the greater (compared to previous best method)

Maximum Error =

ever is the greater (compared to for previous best method)

NEW

correction is used for

1. From the latest available flow data and flowmeter characteristics plotted as a function of Parameter Ft. where,

ROTAMETERS

Row tables

-t

2% or

-t

CORRELATION *

6% or

and If q as a function of

~(10

for any suitable

0.5 S.D. which-

K, A new more

~(10

SD.

log C,)

log K,) with

condi-

ana-

4% for

which-

2 1.5

12%

and

function of the

independent of

KR physlcal

properties of the fluid and the

meter only. It is proportional to the square root of the Archimedes number (a dimensionless quantity used in fluid dynamics analysis).

2.Two

new functions related toy and u are

fined as,

a. W = log and log z

b.V=logv,wherev=u-u,

and

3. The analytical

V is given by,

This best values of the four coefficients, n3

determined by a graphical least squares anal- ysis of cross plots and coefficients analysis to yield

‘Relerence:

Meas.

W =

polynomial expression is evaluated

turn are determined by a similar n,=a,+q,R+q2R2

=a,,+a,,R+a,,RZ

n, n3

= a, +

Gitmont

Control

and a

where w = log z log

log (y, y)

y,=yasu z,=zatSt=5

u,=uatSt=5

relatlonship between W and

a,,R

aZO

n2 =

a,,R +

Wechster.8

V21,

No.

n,V3

i n,V*

n,V +

derivattve plots These

as follows:

polynominals

a&+

+ +

aZ2RZ

P.148 (Dec. 1987).

GB-104350

using

n,. n,.

flow-

the

and

de-

5. The relationship between plified in the Stokes

6. The correction factor,

is a simple function of

where,

The coefficients of the linear function above are again evaluated by a graphical least squares analysis of cross plots of data to yield:

and

region as before to

St<5

where

m,=m,+m,,RJ m,

mrp

is defined by:

namely,

m,, +

give:

division ingi;98D,

whfch

flow, by the program. If one attempted these compu- tations with a scientific calculator, it would require an inordinate amount of time to obtain the

sim-

C, and St

plete table produced by the computer program as illustrated above.

ordenng your specific computerized table

When please supply the following information:

a. At b. At standard conditions of 1 atm. and 70°F

3. Float material

4. Flowmeter

Units of flow desired

particular flowmeter.

for each

4-R

in turn is converted to the standard rate

TO,ORDER

IiOW

operating

pressure and temperature

conditions of

condltlons ofvolumetnc rate at yields the

072/0390

Substitut-

K ,

com-

specified

wheresize and serial number

OMEGA@

ROTARilETERS

iIGH-ACCURACY, UNSHIELDED

Computer tables are now included at no extra charge

four tables in ail, air and water at standard condi- tions using glass and stainless steel floats. For other fluids and any conditions of flow.

The standard calibration chart for air and water using

the glass float now contains the values of

with the new generalized correlation.

Calibration curves for any fluid and float can be obtained at the

operating

conditions of flow using the new generalized correlation. Only the density and viscosity of the fluid need be known.

Each serialized meter is statistically calibrated with

air at three points (an improvement over the previous two point calibration) to assure an accuracy of

1 Scale division (whichever is the greater).

. Readings are reproducible to

divisions (whichever is the greater).

Other features have been maintained as follows:

1. Specially designed Teflon stops accept cones. ponding tapered joints and O-Rings to make a vacuum tight seal.

2. Permanent black ceramic scale and white background for easy reading.

3. Corrosion resistant-fluid comes in contact with

1% or

glass and tefion only (when using glass float and plain end meter).

4. Glass and stainless steel floats are supplied with each meter. A conversion chart indicates pressure drops for each float and converts flow rates with the glass float to those with stainless steel.

These flowmeters are manufactured from tapered precision bore tubing to ultimate tolerances

.0002’)

which give maximum precision attainable

for spherical float rotameters.

The tolerances on

the floats are of comparable magnitude.

The latest generalized correlation is based on a new dimensionless

number). Prediction of fluid flows with an accuracy at least twice as good as any previous method is now possible (see page 1). See DIRECTIONS of sample calculations using graphical and analytical methods.

U.S.

Patent No.

Reference:

p.2070

Reference: p.148

SIZE N

Description

.etlan

Stop, Top

retIon

Stop. Bottom

:lowmeter

Tube

klmt,

inner

loIni.

Outer

101 Ring 1

I-Ring

EPR

-LOAT ;1ass ;?I

166

lCttt

149 24

density,

ttt suppled

(1941).

(Dec.

JOl",

253 8

26 32

and

= pf

wlfh

Gilmont

Gllmont

1987).

FwFC Pf

1 F-2032 S

conversion

3OF-2032.TC

quantityKi”(related

3,183,713

Maurer.

Cat. No. F-2004 F-1104

F-2005 F-1105 F-1205 F-2031 F-1131 F-1133 F-1134

S-1105 S~l105-E

F-2032

magmfylng

for

char,

Control Sys. V.34.

Instr.

&Control V.21, N

Meas.

8 Wechsler.

Cat. No.

F-1133 F-l 233 F-1134

S-1105 S-ll05~E

F~ll32 F-1132-S F-1132-T F-1232-T

factors far Fw are

flow and pressure drop

NOTE: Extremely dry gases,

to electrostatic charge build-up.

for use

0.5 scale

.OOOl-

(-t

to the Archimedes

SPARE I

Cat.

No.

F~l204 F-1231 F-i 234

F-7032 F-7032-E

F-1232 F-1232~s

wakr

& ar

at low flows, may cause erratic readings due

DIRECTIONS

The procedure for calculating the flow of any fluid of known density and viscosity are based on the new standard correlation curve supplied with the new serialized flowmeter. NOTE: Owners of old serial bers may write for a new the size and serial number of the flowmeter.

Select the desired value of Rat the corresponding value of

scale

division from the calibration curve supplied.

Calculate the value of

where,

and

note,

From the correlation chart on the next page obtain the value

corresponding to

chart

at no extra charge, by supplying us with

GRAPHICAL SOLUTION

KR:

W ,(p:j-pipl ”l

,.;,

K,=

viscoscity

= weight of float in g/cc

density of float in

density of fluid in

[

of fluid in cp= p

g/cc

Kn.

When

glee

.19.

use the equation

are given in the calibration curve data.

and

.0852K,R’5C, =

Determine the value of the correction factor.

10, the value of R values of

K, as

letermine

a. Calculate the value of

follows:

b. From the Correction Factor Chart on the page following thr

Correlation Chart, obtain the value of to the values of

c. Calculate the value of

Calculate the volumetric rate of flow,

whers,

D, snd

= Diam. float in inches from data.

above.value of

The

.educed

to a volume measured at standard conditions,

density at standard conditions

Nhere.

JAR1

rs LIST

Cat. No. F-1304

F-1305 F-1331 F-1333 F-1334 S-1205

S 1205-E

F~l332

2119-S 1332-Trantttt

Shown with resDective

FL-105

ioint

4 5

Cat. No.

F-2404 F-2504 F-1405 F-1505 F

1431 F-1433 F-1533 F

1434 F-1534 F

1435-v

F-1435E

F~l432 F

1432-S

1432.TC

Cat. No.

F-1531

F-1x35~”

F-1535-E

F-1532 F-1532-S

F-1532.TC

Flowmeter, Size

2.53 g/cc.

,653

.0842

,233

-OFI

ANALYTICAL SOLUTION see page following the

r:ON CHART.

CLEANING:

sised not to lose the ball, especially for the smaller sizes It is 318

to replace the ball with negligible error because the diameter density of the ball are held to very close tolerances. Normal method: 3f cleaning are recommended using mild detergents and drying witt acetone.

JOINT SETS: It is recommended that short lengths of flexible [such as tygon or teflon) be used on each end to hold the joints se

To protect the tiny teflon stops of these smaller sizes a suitable nee dle may be inserted in the orifice upon assembly and disassembly

SAMPLE CALCULATIONS

.0625

= 0,

glee.

.99d

g/cc. Values of

.00530(2.53 L

.097 ,693

When cleaning the meter, great care should be

K, may be

taken as unity. If not

,350 t

- IogK,

R and

K,:

K ,= ,-- P

[

is at the conditions of flow which

FllOO,

#l.

in. Water at 40

.992).992

1.021

2.53 100/R,

4.44

2.30,526

IOQR

!T2 R,PI

+ 2 CRK4R

[

‘)

!%-

D, 6 = 59

PPt

Glass Float,

‘C.

5, 10

1 .923 ,870

100/k?,

‘s

= W,

,653

25R

.06836.

.P64 ,962

5.48 5.45

num

For gases

correspondin<

may be

qpfp

q ’

q’:

p, g,

.00530

.99i

= p

cp.,

.2130Kq =

.%33 ,956

CORRELA.

exer.

POSSi.

tubin<

(#O

and curely to the flowmeter especially with the smaller sizes

the

antK,.

aru

#1)

IO%0

10130 12130 14135 19138 24140

JOlNTSt

CAT. NO.

FL-J1

FL-J1 FL-J2 FL-J3 FL-J4 FL-J5

FLOWUETERS,

MLlMlN

RANGES

SIZE

Each meter is supplied with complete directions and correlation charts for calculating the calibration curve for any fluid whose density and viscosity are

known. Owners of serialized flowmeter made prior to the new computerized correlation, may order any one of the four computer tables,

Just supply us with flowmeter size and serial number and

tconsists ttFlow

ranges for glass float stated above may be extended by factors of approx 2 to 3 by using heavier floats. See Spare Parts List.

AIR

0.2-100 ,002-l

l-280

10-1900 0.2-36

200s14,000 l OOO-36,000 3000-77,000

of one inner and outer joint plus two O-rings.

WATER

.Ol-4.0

3-300

1 O-850

30-l 900

PLAIN ENDS

CAT. NO.

FL-100 FL-101 FL-102 FL-103 FL-104 FL-105

specify

FLOAT

DIAM.

.0469 .0625 .125 ,250 ,375 ,500

desired tables.

TUBE

O.D.

5116 5116 5116

7116 11116 15/16

TUBE

LENGTH

SET OF

l/2

‘/2

7 7

+ 2 hidden pages