awwa manual m6, water meters—selection, installation ......the 2018 addendum to awwa manual m6,...

1

Addendum to

AWWA Manual M6, Water Meters—Selection, Installation, Testing,

and Maintenance, Fifth Edition(November 2018)

Purpose

The 2018 Addendum to AWWA Manual M6, Water Meters—Selection, Installation, Testing, and Maintenance, fifth edition, provides guidance to users on testing procedures and related topics for meters conforming to standard ANSI/AWWA C715-18 Cold-Water Meters—Electromagnetic and Ultrasonic Type, for Revenue Applications. This standard was approved by the AWWA Standards Committee on Water Meters on February 19, 2018, approved by the AWWA Board of Directors on June 9, 2018, and made effective on October 1, 2018.

The 2018 Addendum is considered a part of AWWA Manual M6 wherever the manual is referenced by AWWA water meter standards or other documents.

The current edition of AWWA Manual M6, the fifth edition, was published in 2012. The AWWA Water Meter Standards Committee believes that the 2018 Addendum to the manual fills an immediate need by water utilities for up-to-date meter testing procedures and that it was important for this information to be published in the interim, as work is continuing on the sixth edition of the manual.

Background

Historically, AWWA Manual M6 has served as a guide to best practices for water meters, as a companion document to the AWWA water meter standards. From a practical standpoint, the manual is often used as a reference tool by utilities in their meter shops for determining and executing the proper testing procedures for the various meter types and sizes.

As the family of AWWA water meter standards has expanded over the years to include new meter types, AWWA Manual M6 has also grown to include information on these new meters. The common practice has been that Manual M6 includes information on the meter types for which an AWWA standard exists. The fifth edition of the manual, for example, was expanded in 2012 to include information on singlejet-type (ANSI/AWWA C712) and fluidic oscillator-type (ANSI/AWWA C713) meters. The sixth edition will include more information on electromagnetic- and ultrasonic-type (ANSI/AWWA C715) meters, as well as meters for residential fire sprinkler systems in one- and two-family dwellings and manufactured homes (ANSI/AWWA C714).

Copyright © 2018 American Water Works Association. All Rights Reserved.

2

Testing Procedures

Table 5-3 includes recommended data for testing cold-water meters by the volumetric method, using volumetric tanks, or by the gravimetric method, using weight scales. This data may also be used for testing cold-water meters against a master or reference meter that has a known calibration curve. Accuracy standards for new meters are contained in the latest editions of standards ANSI/AWWA C700, C701, C702, C703, C704, C708, C710, C712, C713, C714, and C715. The modified Table 5-3 issued in this addendum reflects the latest accuracy standards from these AWWA standards.

The following listing provides additional guidance on meter testing, beyond the modifications made in Table 5-3.

1. In testing meters to validate their accuracy (either prior to deployment or after some time in service), note that the testing procedures for electronic meters, may be different from those meters previously placed in service. The manufacturer’s recommended testing procedures should be followed. Ignoring these recommendations can invalidate the accuracy results.

2. Electronic meters do not have moving parts and, therefore, are not subject to the same wear and tear as mechanical meters. Although AWWA standards for mechanical water meters provide recommended testing frequencies in the appendix of each standard, recommended testing frequencies are not provided in the appendix of ANSI/AWWA C715. Water quality and other local conditions may affect the performance of electronic meters over time. To assess these site-specific effects, the utility may choose to verify the accuracy of electronic meters at the recommended test frequencies provided in AWWA standards for mechanical meters, until the utility establishes its own criteria based on data collected on its operational experience and local conditions.

3. Some of the smaller electronic meters have minimum rate accuracy requirements at lower flow rates than any of the rates given in other AWWA meter standards (i.e., flow rates lower than 0.25 gpm). In other instances, the minimum rate flow rates of electronic meters may be lower than those of the mechanical meters previously deployed by the utility, for any given line size. Accuracy at these lower flow rates, therefore, might be more difficult to test and verify on the existing utility’s meter test bench equipment. Gravimetric systems might provide more sensitivity than volumetric systems. In all cases, the testing equipment must be maintained properly, calibrated periodically, and certified to ensure it is working properly.

4. As discussed in item #3, a utility’s testing equipment may not be capable of testing electronic meters reliably at the lower flow rates (particularly for flow rates even lower than the minimums given in ANSI/AWWA C715, if part of the manufacturer’s warrantied accuracy claims). If this is the case, an independent third-party service company with certified and calibrated equipment along with sound testing protocols may need to be engaged to verify accuracy. As provided in one of the footnotes for the modified Table 5-3 in this addendum, a utility may alternatively increase the minimum test rate flow to stay within the capability of their equipment, while holding the electronic meters to their tighter accuracy requirement at these somewhat higher flow rates. Utilities may also wish to use these somewhat higher flow rates when there are test time constraints.

5. Historically, Table 5-3 has included some caveats in test quantity recommendations, relative to the footnote that has called for “not less than 3 min running.” This has been most notable for some of the maximum rate test quantities, which would result in test run times well below three minutes in length. This ambiguity recognizes limitations in the number and size of test tanks with which the utility may be equipped. The footnote further provides that, for reduced test quantities, “the resultant increase in total test


3

uncertainties and errors need to be recognized.” While mechanical water meters may have been able to accommodate those test quantities in Table 5-3 that result in test times of less than three minutes, this may not be the case for some electronic meters. A special test mode—temporarily increasing the sampling rate for the meter—may be available for some electronic meter designs, to mitigate the test uncertainties associated with test times shorter than three minutes.

6. Table 5-3 provides recommended test flow rates. These recommendations are based, in part, on the observation that all meters of the same type (all positive displacement meters, all turbine meters, and so on) will exhibit the same or similar characteristic accuracy curves. This may not be a valid observation for electronic meters, for which distinct calibration algorithms may be in use. As a result, alternate or additional flow test rates may be considered. These would be especially relevant for flow rates given in the manufacturer’s performance claims that significantly exceed the ranges established in AWWA water meter standards.

7. Electromagnetic- and ultrasonic-type electronic meters are inferential in nature, measuring water velocities and inferring volumetric flows based on these velocities. (Many mechanical flow meters are also inferential in nature.) Inferential meters can be susceptible to flow profile disturbances, and to “noisy” flow delivery systems (e.g., pressure pulsations). Care should be taken to ensure that utility test stands do not introduce disturbances or noise at levels that are not representative of those that occur in actual field installations.

For the sixth edition of this manual, expanded information on several aspects of meter testing will be provided; these will include test uncertainties related to testing equipment, test uncertainties related to procedures and practices, and evaluation of accuracy results for meters pulled from service in the field. If users of this manual have any comments, questions, or suggestions regarding this manual, they can contact the AWWA Standards group at [email protected].


4

For t

his 2

018

Man

ual M

6 ad

dend

um, T

able

5-3

of M

anua

l M6,

fifth

edi

tion

(201

2) is

repl

aced

with

the

follo

win

g Ta

ble

5-3:

Tabl

e 5–

3 T

est r

equi

rem

ents

for n

ew, r

ebui

lt, a

nd re

paire

d co

ld-w

ater

met

ers*

Dis

plac

emen

t Met

ers

(AN

SI/A

WW

A C

700

and

C71

0)

Siz

e

Max

imum

Rat

e (A

ll M

eter

s)In

term

edia

te R

ate

(All

Met

ers)

Min

imum

Rat

e (N

ew a

nd R

ebui

lt)M

inim

um

(Rep

aire

d)

Flow

R

ate†

Test

Q

uant

ity††

Acc

urac

y Li

mits

Flow

R

ate*

*Te

st

Qua

ntity

††A

ccur

acy

Lim

itsFl

ow

Rat

eTe

st

Qua

ntity

††A

ccur

acy

Lim

itsA

ccur

acy

Lim

its

in.

gpm

gal

ft3pe

rcen

tgp

mga

lft3

perc

ent

gpm

gal

ft3pe

rcen

tpe

rcen

t (m

in)

1/2

810

010

98.5

–101

.52

101

98.5

–101

.51/

410

195

–101

90

1/2

x 3/

48

100

1098

.5–1

01.5

210

198

.5–1

01.5

1/4

101

95–1

0190

5/8

1510

010

98.5

–101

.52

101

98.5

–101

.51/

410

195

–101

90

5/8

x 3/

415

100

1098

.5–1

01.5

210

198

.5–1

01.5

1/4

101

95–1

0190

3/4

2510

010

98.5

–101

.53

101

98.5

–101

.51/

210

195

–101

90

140

100

1098

.5–1

01.5

410

198

.5–1

01.5

3/4

101

95–1

0190

1½50

100

1098

.5–1

01.5

810

010

98.5

–101

.51½

100

1095

–101

90

210

010

010

98.5

–101

.515

100

1098

.5–1

01.5

210

010

95–1

0190

Mul

tijet

Met

ers

(AN

SI/A

WW

A C

708)

Siz

e

Max

imum

Rat

e (A

ll M

eter

s)In

term

edia

te R

ate

(All

Met

ers)

Min

imum

Rat

e (N

ew a

nd R

ebui

lt)M

inim

um

(Rep

aire

d)

Flow

R

ate†

Test

Q

uant

ity††

Acc

urac

y Li

mits

Flow

R

ate*

*Te

st

Qua

ntity

††A

ccur

acy

Lim

itsFl

ow

Rat

eTe

st

Qua

ntity

††A

ccur

acy

Lim

itsA

ccur

acy

Lim

its

in.

gpm

gal

ft3pe

rcen

tgp

mga

lft3

perc

ent

gpm

gal

ft3pe

rcen

tpe

rcen

t (m

in)

5/8

1510

010

98.5

–101

.51

101

98.5

–101

.51/

410

197

–103

90

5/8

x 3/

415

100

1098

.5–1

01.5

110

198

.5–1

01.5

1/4

101

97–1

0390

3/4

2510

010

98.5

–101

.52

101

98.5

–101

.51/

210

197

–103

90

135

100

1098

.5–1

01.5

310

198

.5–1

01.5

3/4

101

97–1

0390

1½70

100

1098

.5–1

01.5

510

010

98.5

–101

.51½

100

1097

–103

90

210

010

010

98.5

–101

.58

100

1098

.5–1

01.5

210

010

97–1

0390


Con

tinue

d

5

Sing

leje

t Met

ers

(AN

SI/A

WW

A C

712)

Siz

e

Max

imum

Rat

e (A

ll M

eter

s)In

term

edia

te R

ate

(All

Met

ers)

Min

imum

Rat

e (N

ew a

nd R

ebui

lt)M

inim

um

(Rep

aire

d)

Flow

R

ate†

Test

Q

uant

ity††

Acc

urac

y Li

mits

Flow

R

ate*

*Te

st

Qua

ntity

††A

ccur

acy

Lim

itsFl

ow

Rat

eTe

st

Qua

ntity

††A

ccur

acy

Lim

itsA

ccur

acy

Lim

its

in.

gpm

gal

ft3pe

rcen

tgp

mga

lft3

perc

ent

gpm

gal

ft3pe

rcen

tpe

rcen

t (m

in)

5/8

1510

010

98.5

–101

.52

101

98.5

–101

.51/

410

195

–101

.590

5/8

x 3/

415

100

1098

.5–1

01.5

210

198

.5–1

01.5

1/4

101

95–1

01.5

90

3/4

2510

010

98.5

–101

.53

101

98.5

–101

.51/

210

195

–101

.590

140

100

1098

.5–1

01.5

410

198

.5–1

01.5

3/4

101

95–1

01.5

90

1½50

100

1098

.5–1

01.5

810

010

98.5

–101

.51/

210

010

95–1

01.5

90

210

010

010

98.5

–101

.515

100

1098

.5–1

01.5

1/2

100

1095

–101

.590

316

050

050

98.5

–101

.520

100

1098

.5–1

01.5

1/2

100

1095

–101

.590

425

050

050

98.5

–101

.540

100

1098

.5–1

01.5

3/4

100

1095

–101

.590

650

01,

000

100

98.5

–101

.560

100

1098

.5–1

01.5

1½10

010

95–1

01.5

90

Flui

dic-

Osc

illat

or M

eter

s (A

NSI

/AW

WA

C71

3)

Siz

e

Max

imum

Rat

e (A

ll M

eter

s)In

term

edia

te R

ate

(All

Met

ers)

Min

imum

Rat

e (N

ew a

nd R

ebui

lt)M

inim

um

(Rep

aire

d)

Flow

R

ate†

Test

Q

uant

ity††

Acc

urac

y Li

mits

Flow

R

ate*

*Te

st Q

uant

ity††

Acc

urac

y Li

mits

Flow

R

ate

Test

Q

uant

ity††

Acc

urac

y Li

mits

Acc

urac

y Li

mits

in.

gpm

gal

ft3pe

rcen

tgp

mga

lft3

perc

ent

gpm

gal

ft3pe

rcen

tpe

rcen

t (m

in)

1/2

810

010

98.5

–101

.52

101

98.5

–101

.51/

410

195

–101

.590

1/2

x 3/

48

100

1098

.5–1

01.5

210

198

.5–1

01.5

1/4

101

95–1

01.5

90

5/8

1510

010

98.5

–101

.52

101

98.5

–101

.51/

410

195

–101

.590

5/8

x 3/

415

100

1098

.5–1

01.5

210

198

.5–1

01.5

1/4

101

95–1

01.5

90

3/4

2510

010

98.5

–101

.53

101

98.5

–101

.51/

210

195

–101

.590

140

100

1098

.5–1

01.5

410

198

.5–1

01.5

3/4

101

95–1

01.5

90

1½50

100

1098

.5–1

01.5

810

010

98.5

–101

.51½

100

1095

–101

.590

210

0 10

010

98.5

–101

.515

100

1098

.5–1

01.5

210

010

95–1

01.5

90


Con

tinue

d

6

Cla

ss I

Turb

ine

Met

ers,

Ve

rtic

al-S

haft

Type

(AN

SI/A

WW

A C

701)

Siz

e

Max

imum

Rat

e (A

ll M

eter

s)In

term

edia

te R

ate

(All

Met

ers)

Min

imum

Rat

e (N

ew a

nd R

ebui

lt)M

inim

um

(Rep

aire

d)

Flow

R

ate†

Test

Q

uant

ity††

Acc

urac

y Li

mits

Flow

R

ate*

*Te

st

Qua

ntity

††A

ccur

acy

Lim

itsFl

ow

Rat

eTe

st

Qua

ntity

††A

ccur

acy

Lim

itsA

ccur

acy

Lim

its

in.

gpm

gal

ft3pe

rcen

tgp

mga

lft3

perc

ent

gpm

gal

ft3pe

rcen

tpe

rcen

t (m

in)

3/4

3010

010

98–1

023

101

98–1

021½

101

98–1

02—

150

100

1098

–102

510

198

–102

210

198

–102

—

1½10

050

050

98–1

0210

100

1098

–102

310

010

98–1

02—

216

050

050

98–1

0216

100

1098

–102

410

010

98–1

02—

335

01,

000

100

98–1

0235

100

1098

–102

610

010

98–1

02—

460

01,

500

200

98–1

0260

100

1098

–102

810

010

98–1

02—

61,

250

4,00

050

098

–102

125

1,00

010

098

–102

151,

000

100

98–1

02—

Cla

ss II

Tur

bine

Met

ers,

In

-Lin

e (H

igh-

Velo

city

) Typ

e (A

NSI

/AW

WA

C70

1)

Siz

e

Max

imum

Rat

e (A

ll M

eter

s)In

term

edia

te R

ate

(All

Met

ers)

Min

imum

Rat

e (N

ew a

nd R

ebui

lt)M

inim

um

(Rep

aire

d)

Flow

R

ate†

Test

Q

uant

ity††

Acc

urac

y Li

mits

Flow

R

ate*

*Te

st

Qua

ntity

††A

ccur

acy

Lim

itsFl

ow

Rat

eTe

st

Qua

ntity

††A

ccur

acy

Lim

itsA

ccur

acy

Lim

its

in.

gpm

gal

ft3pe

rcen

tgp

mga

lft3

perc

ent

gpm

gal

ft3pe

rcen

tpe

rcen

t (m

in)

1½10

050

050

98.5

–101

.54

100

1098

.5–1

01.5

—

216

050

050

98.5

–101

.54

100

1098

.5–1

01.5

—

335

01,

000

100

98.5

–101

.58

100

1098

.5–1

01.5

—

463

01,

500

200

98.5

–101

.515

100

1098

.5–1

01.5

—

61,

400

4,00

050

098

.5–1

01.5

301,

000

100

98.5

–101

.5—

82,

400

7,00

090

098

.5–1

01.5

501,

000

100

98.5

–101

.5—

103,

800

10,0

001,

300

98.5

–101

.575

1,00

010

098

.5–1

01.5

—

125,

000

15,0

002,

000

98.5

–101

.512

01,

000

100

98.5

–101

.5—

167,

000

30,0

004,

000

98.5

–101

.520

01,

000

100

98.5

–101

.5—

2010

,000

40,0

005,

000

98.5

–101

.530

01,

000

100

98.5

–101

.5—


Con

tinue

d

7

Prop

elle

r Met

ers

(AN

SI/A

WW

A C

704)

Siz

e

Max

imum

Rat

e (A

ll M

eter

s)In

term

edia

te R

ate

(All

Met

ers)

Min

imum

Rat

e (N

ew a

nd R

ebui

lt)M

inim

um

(Rep

aire

d)

Flow

R

ate†

Test

Q

uant

ity††

Acc

urac

y Li

mits

Flow

R

ate*

*Te

st

Qua

ntity

††A

ccur

acy

Lim

itsFl

ow

Rat

eTe

st

Qua

ntity

††A

ccur

acy

Lim

itsA

ccur

acy

Lim

its

in.

gpm

gal

ft3pe

rcen

tgp

mga

lft3

perc

ent

gpm

gal

ft3pe

rcen

tpe

rcen

t (m

in)

210

030

040

98–1

0245

200

2598

–102

90

325

080

010

098

–102

8020

025

98–1

0290

450

01,

500

200

98–1

0285

250

3098

–102

90

61,

200

2,50

030

098

–102

160

500

6098

–102

90

81,

500

3,00

040

098

–102

190

500

6098

–102

90

102,

000

4,00

050

098

–102

260

500

6098

–102

90

122,

800

6,00

080

098

–102

275

750

100

98–1

0290

143,

750

8,00

01,

000

98–1

0235

01,

000

130

98–1

0290

164,

750

10,0

001,

300

98–1

0245

01,

500

200

98–1

0290

185,

625

12,0

001,

600

98–1

0255

02,

000

250

98–1

0290

206,

875

15,0

002,

000

98–1

0265

02,

500

300

98–1

0290

2410

,000

20,0

002,

500

98–1

021,

000

4,00

050

098

–102

90

3015

,000

30,0

004,

000

98–1

021,

600

6,00

080

098

–102

90

3620

,000

40,0

005,

000

98–1

022,

400

7,50

01,

000

98–1

0290

4228

,000

40,0

005,

000

98–1

022,

800

10,0

001,

300

98–1

0290

4835

,000

50,0

006,

000

98–1

023,

500

12,5

001,

500

98–1

0290

5445

,000

60,0

008,

000

98–1

025,

000

16,0

002,

000

98–1

0290

6060

,000

70,0

009,

000

98–1

026,

000

20,0

002,

500

98–1

0290

6675

,000

80,0

0011

,000

98–1

027,

500

25,0

003,

000

98–1

0290

7290

,000

90,0

0012

,000

98–1

029,

000

28,0

003,

500

98–1

0290


Con

tinue

d

8

Com

poun

d M

eter

s (A

NSI

/AW

WA

C70

2)§

Siz

e

Max

imum

Rat

e (A

ll M

eter

s)C

hang

e O

ver P

oint

(A

ll M

eter

s)M

inim

um R

ate

(New

and

Reb

uilt)

Min

imum

(R

epai

red)

Flow

R

ate†

Test

Q

uant

ity††

Acc

urac

y Li

mits

Flow

R

ate*

*Te

st

Qua

ntity

††A

ccur

acy

Lim

itsFl

ow

Rat

eTe

st

Qua

ntity

††A

ccur

acy

Lim

itsA

ccur

acy

Lim

its

in.

gpm

gal

ft3pe

rcen

tgp

mga

lft3

perc

ent

gpm

gal

ft3pe

rcen

tpe

rcen

t (m

in)

Cla

ss I

Cla

ss II

216

040

050

97–1

0398

.5–1

01.5

90–1

0395

–101

90

332

01,

000

100

97–1

0398

.5–1

01.5

90–1

0395

–101

90

450

01,

500

200

97–1

0398

.5–1

01.5

90–1

0395

–101

90

61,

000

3,00

040

097

–103

98.5

–101

.590

–103

95–1

0190

81,

600

4,00

050

097

–103

98.5

–101

.590

–103

95–1

0190

102,

300

4,00

050

097

–103

98.5

–101

.590

–103

95–1

0190

Fire

-Ser

vice

Typ

e, T

ype

I and

Typ

e II

(AN

SI/A

WW

A C

703)

(Tes

t at i

nter

med

iate

rate

not

nec

essa

ry.)§

Siz

e

Max

imum

Rat

e (A

ll M

eter

s)C

hang

e O

ver P

oint

(A

ll M

eter

s)M

inim

um R

ate

(New

and

Reb

uilt)

Min

imum

(R

epai

red)

Flow

R

ate†

Test

Q

uant

ity††

Acc

urac

y Li

mits

Flow

R

ate*

*Te

st Q

uan-

tity†

†A

ccur

acy

Lim

itsFl

ow

Rat

eTe

st

Qua

ntity

††A

ccur

acy

Lim

itsA

ccur

acy

Lim

its

in.

gpm

gal

ft3pe

rcen

tgp

mga

lft3

perc

ent

gpm

gal

ft3pe

rcen

tpe

rcen

t (m

in)

Type

ITy

pe II

Not

less

th

an 8

5%N

ot le

ss

than

95%

335

070

010

097

–103

98.5

–101

.590

470

01,

500

200

97–1

0398

.5–1

01.5

90

61,

600

3,00

040

097

–103

98.5

–101

.590

82,

800

5,00

070

097

–103

98.5

–101

.590

104,

400

9,00

01,

200

97–1

0398

.5–1

01.5

90


Con

tinue

d

9

Fire

Ser

vice

Typ

e, T

ype

III (A

NSI

/AW

WA

C70

3)

Siz

e

Max

imum

Rat

e (A

ll M

eter

s)In

term

edia

te R

ate

(All

Met

ers)

Min

imum

Rat

e (N

ew a

nd R

ebui

lt)M

inim

um

(Rep

aire

d)

Flow

R

ate†

Test

Q

uant

ity††

Acc

urac

y Li

mits

Flow

R

ate*

*Te

st

Qua

ntity

††A

ccur

acy

Lim

itsFl

ow

Rat

eTe

st

Qua

ntity

††A

ccur

acy

Lim

itsA

ccur

acy

Lim

its

in.

gpm

gal

ft3pe

rcen

tgp

mga

lft3

perc

ent

gpm

gal

ft3pe

rcen

tpe

rcen

t (m

in)

335

070

010

098

.5–1

01.5

1010

010

98.5

–101

.54

100

1095

–101

.5—

470

01,

500

200

98.5

–101

.530

500

5098

.5–1

01.5

1010

010

95–1

01.5

—

61,

600

3,00

040

098

.5–1

01.5

6010

0010

098

.5–1

01.5

2010

0010

095

–101

.5—

82,

800

5,00

070

098

.5–1

01.5

7010

0010

098

.5–1

01.5

3010

0010

095

–101

.5—

104,

400

9,00

01,

200

98.5

–101

.511

010

0010

098

.5–1

01.5

3510

0010

095

–101

.5—


Con

tinue

d

10

Elec

trom

agne

tic a

nd U

ltras

onic

Met

ers

for R

even

ue A

pplic

atio

ns,

Type

I (A

NSI

/AW

WA

C71

5)

Siz

e

Max

imum

Rat

e (A

ll M

eter

s)In

term

edia

te R

ate

(All

Met

ers)

Min

imum

Rat

e (N

ew a

nd R

ebui

lt)M

inim

um

(Rep

aire

d)

Flow

R

ate†

Test

Q

uant

ity††

Acc

urac

y Li

mits

Flow

R

ate*

*Te

st

Qua

ntity

††A

ccur

acy

Lim

itsFl

ow

Rat

e§§

Test

Q

uant

ity††

Acc

urac

y Li

mits

§§A

ccur

acy

Lim

its

in.

gpm

gal

ft3pe

rcen

tgp

mga

lft3

perc

ent

gpm

gal

ft3pe

rcen

tpe

rcen

t (m

in)

1/2

810

010

98.5

–101

.50.

3510

198

.5–1

01.5

0.11

(0

.18)

101

95–1

05(9

8.5–

101.

5)—

5/8

1510

010

98.5

–101

.50.

410

198

.5–1

01.5

0.13

(0

.20)

101

95–1

05(9

8.5–

101.

5)—

3/4

2510

010

98.5

–101

.51

101

98.5

–101

.50.

15

(0.5

)10

195

–105

(98.

5–10

1.5)

—

140

100

1098

.5–1

01.5

1.5

101

98.5

–101

.50.

3 (0

.75)

101

95–1

05(9

8.5–

101.

5)—

1½60

100

1098

.5–1

01.5

410

010

98.5

–101

.50.

6 (2

)10

010

95–1

05(9

8.5–

101.

5)—

210

010

010

98.5

–101

.55

100

1098

.5–1

01.5

1 (2

.5)

100

1095

–105

(98.

5–10

1.5)

—

320

050

050

98.5

–101

.515

100

1098

.5–1

01.5

2.5

(7.5

)10

010

95–1

05(9

8.5–

101.

5)—

440

01,

000

100

98.5

–101

.520

500

5098

.5–1

01.5

3.5

(10)

300

4095

–105

(98.

5–10

1.5)

—

680

02,

000

200

98.5

–101

.540

1,00

010

098

.5–1

01.5

9 (20)

300

4095

–105

(98.

5–10

1.5)

—

81,

000

5,00

050

098

.5–1

01.5

803,

000

400

98.5

–101

.518

(4

0)2,

000

300

95–1

05(9

8.5–

101.

5)—

Con

tinue

d


11

Elec

trom

agne

tic a

nd U

ltras

onic

Met

ers

for R

even

ue A

pplic

atio

ns,

Type

II (A

NSI

/AW

WA

C71

5)

Siz

e

Max

imum

Rat

e (A

ll M

eter

s)In

term

edia

te R

ate

(All

Met

ers)

Min

imum

Rat

e (N

ew a

nd R

ebui

lt)M

inim

um

(Rep

aire

d)

Flow

R

ate†

Test

Q

uant

ity††

Acc

urac

y Li

mits

Flow

R

ate*

*Te

st

Qua

ntity

††A

ccur

acy

Lim

itsFl

ow

Rat

eTe

st

Qua

ntity

††A

ccur

acy

Lim

itsA

ccur

acy

Lim

its

in.

gpm

gal

ft3pe

rcen

tgp

mga

lft3

perc

ent

gpm

gal

ft3pe

rcen

tpe

rcen

t (m

in)

1/2

810

010

98.5

–101

.52

101

98.5

–101

.50.

2510

195

–105

—

5/8

1510

010

98.5

–101

.52

101

98.5

–101

.50.

2510

195

–105

—

3/4

2510

010

98.5

–101

.54

101

98.5

–101

.50.

510

195

–105

—

140

100

1098

.5–1

01.5

610

198

.5–1

01.5

0.75

101

95–1

05—

1½10

010

010

98.5

–101

.58

100

1098

.5–1

01.5

1.5

100

1095

–105

—

215

010

010

98.5

–101

.512

100

1098

.5–1

01.5

210

010

95–1

05—

335

050

050

98.5

–101

.530

100

1098

.5–1

01.5

410

010

95–1

05—

460

01,

000

100

98.5

–101

.550

500

5098

.5–1

01.5

7.5

300

4095

–105

—

680

02,

000

200

98.5

–101

.511

01,

000

100

98.5

–101

.515

300

4095

–105

—

82,

000

5,00

050

098

.5–1

01.5

200

3,00

040

098

.5–1

01.5

302,

000

300

95–1

05—

103,

000

7,00

090

098

.5–1

01.5

300

5,00

050

098

.5–1

01.5

503,

000

400

95–1

05—

124,

000

10,0

001,

000

98.5

–101

.540

05,

000

500

98.5

–101

.565

3,00

040

095

–105

—

165,

500

50,0

007,

000

98.5

–101

.575

030

,000

4,00

098

.5–1

01.5

110

20,0

003,

000

95–1

05—

208,

000

50,0

007,

000

98.5

–101

.51,

100

30,0

004,

000

98.5

–101

.517

520

,000

3,00

095

–105

—

Met

ers

for R

esid

entia

l Fire

Spr

inkl

er S

yste

ms

in O

ne- a

nd T

wo-

Fam

ily

Dw

ellin

gs a

nd M

anuf

actu

red

Hom

es (A

NSI

/AW

WA

C71

4)

Siz

e

Max

imum

Rat

e (A

ll M

eter

s)In

term

edia

te R

ate

(All

Met

ers)

Min

imum

Rat

e (N

ew a

nd R

ebui

lt)M

inim

um

(Rep

aire

d)

Flow

R

ate†

Test

Q

uant

ity††

Acc

urac

y Li

mits

Flow

R

ate*

*Te

st

Qua

ntity

††A

ccur

acy

Lim

itsFl

ow

Rat

e§§

Test

Q

uant

ity††

Acc

urac

y Li

mits

Acc

urac

y Li

mits

in.

gpm

gal

ft3pe

rcen

tgp

mga

lft3

perc

ent

gpm

gal

ft3pe

rcen

tpe

rcen

t (m

in)

3/4

2510

010

98–1

023

101

98–1

021/

210

195

–103

90

140

100

1098

–102

410

198

–102

3/4

101

95–1

0390

1½50

100

1098

–102

810

010

98–1

021½

100

1095

–103

90

210

010

010

98–1

0215

100

1098

–102

210

010

95–1

0390

Con

tinue

d


12

* A re

built

met

er is

one

that

has

had

the

mea

surin

g el

emen

t rep

lace

d w

ith a

fact

ory-

mad

e ne

w u

nit.

A re

paire

d m

eter

is o

ne th

at h

as h

ad th

e ol

d m

easu

ring

elem

ent c

lean

ed a

nd re

furb

ishe

d in

a u

tility

repa

ir sh

op.

† Th

ese

are

sugg

este

d te

st fl

ows

and

test

qua

ntiti

es. T

estin

g fo

r hig

h ra

tes

of fl

ow c

an b

e ac

hiev

ed b

y te

stin

g th

e m

eter

at 2

5% o

f the

met

ers

ratin

g if

the

man

ufac

ture

r’s o

rigin

al te

st c

ertifi

cate

indi

cate

s a

linea

r cur

ve b

etw

een

25%

and

100

% o

f the

rate

d flo

w ra

nge.

†† Q

uant

ity s

houl

d be

one

or m

ore

full

revo

lutio

ns o

f the

test

han

d / i

nitia

l dia

l (se

e “M

axim

um In

dica

tion

on In

itial

Dia

l” va

lues

spe

cifie

d in

m

echa

nica

l met

er s

tand

ards

suc

h as

AN

SI/A

WW

A C

700,

C70

1, a

nd s

o on

), or

a q

uant

ity n

ot le

ss th

an th

e “M

axim

um A

llow

able

Indi

catio

n on

In

itial

Dis

play

” val

ues

spec

ified

in A

NS

I/AW

WA

C71

5. Q

uant

ity s

houl

d re

sult

in n

ot le

ss th

an 3

min

utes

runn

ing.

Whe

n lim

ited

test

cap

abili

ties

forc

e th

e us

e of

sm

alle

r tes

t qua

ntiti

es, t

he re

sulta

nt in

crea

se in

tota

l tes

t unc

erta

intie

s an

d er

rors

nee

d to

be

reco

gniz

ed w

hen

esta

blis

hing

ac

cept

ance

crit

eria

tole

ranc

e.

§ Th

e by

pass

met

er s

houl

d be

test

ed in

acc

orda

nce

with

the

appr

opria

te te

st re

quire

men

ts fo

r the

type

of m

eter

use

d.

** A

s th

is ra

te v

arie

s ac

cord

ing

to m

anuf

actu

rer,

it sh

ould

be

dete

rmin

ed fo

r eac

h ty

pe o

f met

er te

sted

.

§§ M

inim

um te

st fl

ow ra

tes

with

cor

resp

ondi

ng a

ccur

acy

limits

in p

aren

thes

es (

) are

alte

rnat

ive

valu

es, t

o ac

com

mod

ate

conc

erns

ove

r tes

t tim

es o

r con

cern

s ov

er te

st b

ench

es b

eing

abl

e to

con

duct

test

ing

at th

e sm

alle

r flow

rate

s (w

ithou

t par

enth

eses

) rel

iabl

y. N

ote

that

the

flow

ra

te v

alue

s in

par

enth

eses

are

the

low

est r

ates

for t

he n

orm

al te

st li

mits

from

AN

SI/A

WW

A C

715,

and

as

such

wou

ld h

ave

accu

racy

lim

its o

f 98

.5%

−101

.5%

. If t

hese

flow

rate

s in

par

enth

eses

are

use

d in

Min

imum

Rat

e te

stin

g, th

en th

e re

com

men

ded

test

flow

rate

s fo

r the

Inte

rmed

i-at

e R

ate

shou

ld b

e tw

ice

thos

e lis

ted

in th

e ta

ble.

How

ever

, see

the

prec

edin

g fo

otno

te, d

etai

ling

the

pref

erre

d us

e of

an

inte

rmed

iate

rate

de

term

ined

for e

ach

spec

ific

mak

e/m

odel

.

Met

ric C

onve

rsio

ns: i

n. ×

25.

4 =

mm

, gal

× 0

.003

785

= m

3 , g

pm ×

0.2

268

= m

3 /h,

ft3

× 0.

0283

1 =

m3 .


awwa manual m6, water meters—selection, installation ......the 2018 addendum to awwa manual m6,...

Documents