Seametrics IP80-Series - Manual (Page 4)

Page 4
Fitting Installation.­­­­ ­­­­ Stainless­­­­ steel­­­­ and­­­­ brass­­­­ fittings­­­­
have­­­­female­­­­pipe­­­­threads,­­­­requiring­­­­the­­­­appropriate­­­­male­­­­
threaded­­­­fittings.­­­­­­­­Saddle­­­­fittings­­­­require­­­­a­­­­hole­­­­to­­­­be­­­­cut­­­­
in­­­­the­­­­pipe­­­­(recommended­­­­hole­­­­size­­­­is­­­­1-3/4”).­­­­­­­­Before­­­­
cutting­­­­into­­­­the­­­­pipe,­­­­observe­­­­the­­­­drawing­­­­below­­­­to­­­­choose­­­­
your­­­­meter­­­­orientation.
PVc Fittings.­­­­ ­­­­ A­­­­ PVC­­­­ fitting­­­­ is­­­­ usually­­­­ installed­­­­ by­­­­ sol-
vent­­­­welding.­­­­­­­­PVC­­­­tees­­­­are­­­­supplied­­­­with­­­­some­­­­upstream­­­­
straight­­­­ pipe,­­­­ less­­­­ than­­­­ the­­­­ recommended­­­­ straight­­­­ pipe­­­­
requirements.­­­­It­­­­is­­­­not­­­­advisable­­­­to­­­­connect­­­­directly­­­­to­­­­the­­­­
end­­­­of­­­­these­­­­fittings­­­­with­­­­a­­­­flow­­­­disturbing­­­­device­­­­(valve,­­­­
elbow),­­­­but­­­­rather­­­­add­­­­straight­­­­pipe­­­­to­­­­the­­­­end­­­­of­­­­these­­­­
fittings­­­­ to­­­­ meet­­­­ the­­­­ straight­­­­ pipe­­­­ requirements­­­­ for­­­­ your­­­­
application.
Meter Installation.­­­­ ­­­­ After­­­­ the­­­­ meter­­­­ fitting­­­­ is­­­­ installed­­­­
in­­­­the­­­­pipeline,­­­­the­­­­meter­­­­can­­­­be­­­­installed­­­­in­­­­the­­­­fitting.­­­­­­­­
Press­­­­the­­­­meter­­­­into­­­­the­­­­fitting­­­­as­­­­far­­­­as­­­­it­­­­will­­­­go.­­­­­­­­Retain­­­­
the­­­­meter­­­­in­­­­place­­­­by­­­­inserting­­­­the­­­­u-pin.­­­­­­­­The­­­­pin­­­­can­­­­be­­­­
installed­­­­from­­­­either­­­­side.­­­­­­­­It­­­­may­­­­be­­­­necessary­­­­to­­­­rotate­­­­
the­­­­probe­­­­back­­­­and­­­­forth­­­­slightly­­­­to­­­­start­­­­the­­­­pin­­­­into­­­­the­­­­
slots­­­­on­­­­the­­­­probe.­­­­­­­­Slide­­­­the­­­­pin­­­­in­­­­as­­­­far­­­­as­­­­it­­­­will­­­­go.
Insertion Depth.­­­­The­­­­IP80-Series­­­­are­­­­fixed-depth­­­­meters­­­­
that­­­­must­­­­be­­­­used­­­­with­­­­matched­­­­fittings­­­­appropriate­­­­to­­­­the­­­­
application­­­­and­­­­pipe­­­­size.­­­­This­­­­ensures­­­­that­­­­the­­­­flow­­­­sen-
sor­­­­is­­­­installed­­­­at­­­­the­­­­correct­­­­insertion­­­­depth­­­­to­­­­measure­­­­
the­­­­average­­­­flow­­­­velocity­­­­of­­­­the­­­­stream.­­­­­­­­
K-Factor.­­­­­­­­Each­­­­flow­­­­sensor/tee­­­­fitting­­­­pair­­­­is­­­­wet­­­­calibrated­­­­
at­­­­the­­­­factory­­­­and­­­­marked­­­­with­­­­the­­­­correct­­­­K-factor.­­­­Saddle­­­­
fittings­­­­cannot­­­­be­­­­factory-calibrated­­­­at­­­­the­­­­proper­­­­insertion­­­­
depth­­­­ because­­­­ the­­­­ fitting­­­­ must­­­­ first­­­­ be­­­­ installed­­­­ on­­­­ the­­­­
pipe­­­­in­­­­the­­­­field;­­­­therefore,­­­­K-factors­­­­for­­­­saddle­­­­fittings­­­­are­­­­
derived­­­­through­­­­testing­­­­with­­­­standard­­­­pipe­­­­schedules­­­­and­­­­
included­­­­with­­­­the­­­­meter.­­­­In­­­­PVC,­­­­however,­­­­it­­­­is­­­­possible­­­­to­­­­
order­­­­a­­­­saddle­­­­pre-installed­­­­on­­­­a­­­­standard­­­­length­­­­of­­­­pipe,­­­­
and­­­­the­­­­fitting­­­­can­­­­be­­­­wet-calibrated­­­­in­­­­this­­­­case.
Straight Pipe.­­­­Straight­­­­pipe­­­­of­­­­at­­­­least­­­­10­­­­diameters­­­­up-
stream­­­­ and­­­­ five­­­­ diameters­­­­ downstream­­­­ of­­­­ the­­­­ meter­­­­ is­­­­
strongly­­­­recommended­­­­for­­­­proper­­­­accuracy.­­­­This­­­­is­­­­neces-
sary­­­­ because­­­­ the­­­­ shape­­­­ of­­­­ the­­­­ velocity­­­­ profile­­­­ changes­­­­
as­­­­the­­­­rate­­­­increases­­­­around­­­­an­­­­elbow;­­­­placing­­­­the­­­­meter­­­­
too­­­­near­­­­the­­­­elbow­­­­causes­­­­a­­­­distorted­­­­reading.­­­­Additional­­­­
straight­­­­run­­­­may­­­­be­­­­needed­­­­under­­­­specific­­­­adverse­­­­circum-
stances­­­­(see­­­­next­­­­page).
­­­­
If­­­­ you­­­­ can’t­­­­ provide­­­­ enough­­­­ straight­­­­ run­­­­ to­­­­ smooth­­­­ out­­­­
the­­­­velocity­­­­profile,­­­­some­­­­decrease­­­­in­­­­accuracy­­­­may­­­­result.­­­­
This­­­­does­­­­not­­­­mean­­­­the­­­­meter’s­­­­reading­­­­is­­­­meaningless,­­­­
however.­­­­In­­­­some­­­­applications­­­­(e.g.,­­­­control­­­­system,­­­­valve­­­­
operation)­­­­ a­­­­ repeatable­­­­ reading­­­­ may­­­­ be­­­­ more­­­­ important­­­­
than­­­­a­­­­highly­­­­accurate­­­­one.
INStaLLatION
caution:­­­­ Never­­­­ remove­­­­ the­­­­ u-clip­­­­ retainer­­­­
when­­­­ the­­­­ pipe­­­­ is­­­­ under­­­­ pressure.­­­­ ­­­­ Always­­­­
remove­­­­ pressure­­­­ from­­­­ the­­­­ pipe­­­­ before­­­­ you­­­­
attempt­­­­to­­­­remove­­­­the­­­­meter.­­­­­­­­Removal­­­­under­­­­pres-
sure­­­­may­­­­result­­­­in­­­­damage­­­­or­­­­serious­­­­injury.
5X
Diameter­­­­Minimum
(See­­­­Below)
DIStORtED FLOWS
Distorted
Flow­­­­Profile
Faster­­­­Flow
Causes­­­­Meter
To­­­­Read­­­­High
FLOW
10X
Diameter­­­­Minimum
(See­­­­Below)
BEST
Okay, if no air in pipe
Okay, if no sediment in pipe.
POSItIONING tHE MEtER
ARCHIVED
(Includes Dates Before 1/1/201
1)