Electrical Variable Measurements

8/18/2019 Electrical Variable Measurements

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ELECTRICAL VARIABLE

MEASUREMENTS

PRESENTED BY

S.ALAGAR SWAMY09MN02


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0011 0010 1010 1101 0001 0100 1011INTRODUCTION

Measures major ee!"r#!a $arame"ers su!% as &VA' &W'

P(' )er"*' &VAr' Am$s a+, Vo"s' some"#mes aso

%armo+#!s

I+s"a+" measureme+"s !a+ -e "ae+ /#"% %a+,%e,

me"ers' /%#e more a,1a+!e, a!##"a"es !umua"#1erea,#+3s /#"% $r#+" ou"s a" s$e!##e, #+"er1as


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TYPES OF MEASURING

INSTRUMENTS Ee!"r#!a measureme+"

Com-us"#o+ a+a4*er

T%ermome"ers

S$ee, measureme+"

Lea ,e"e!"ors

Lu5 me"ers


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ELECTRICAL MEASUREMENT

Vo"a3e

Curre+"

Vo"a3e6!urre+" $ea

Ee!"#1e 6 rea!"#1e 6 a$$are+" $o/er 7s#+3e$%ase or

8$%asePo/er a!"or


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PRECAUTIONS

• T%e !am$ s%ou, +e1er -e a""a!%e, "o a !#r!u#" "%a"

o$era"es a" more "%a+ ma5#mum ra"e, 1o"a3e' or

o1er -are !o+,u!"ors

• Cam$ o+ $ro-e s%ou, -e !o++e!"e, "o "%e

se!o+,ar4 s#,e o a -reaer

• Ru--er %a+, 3o1es' -oo"s' a+, sae"4 %eme"

s%ou, -e use, "o a1o#, ee!"r#!a s%o!s• T%e o$era"#o+ ma+ua s%ou, -e !o+su"e, -eore

us#+3 "%e e:u#$me+"


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C;MBUSTI;N ANALY


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CONT…

• De"erm#+es "%e !om$os#"#o+ o ue 3ases #+ "%e ,u!"'

/%#!% us%es ou" "%e !om-us"e, 3ases "o "%e

!%#m+e4

• T%e ue 3ases> !om$os#"#o+ 1aues are -ase, o+

1oume

• Usua4 measure "%e = C;2 or ;2 a+, "%e

"em$era"ure o "%e ue 3as• Mos"4' "%e ue 3ases are su!e, ou" #+ or,er "o rea!"

/#"% !%em#!a !es "%a" e+a-es "%e rea,#+3 o ;2 or

C;2


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PRECAUTIONS

A/a4s !a#-ra"e "%e #+s"rume+" #+ o$e+ res% a#r -eore

"a#+3 a se" o measureme+"s

C%e! or !o33#+3 o "%e a#r #"ers

E+sure "%a" "%e ru--er "u-#+3 !arr4#+3 "%e 3ases "o "%e

#+s"rume+" #s +o" -e+,e,

Wra$ "%e o$e+#+3 s$a!e e" -4 !o""o+ ra3s "o e+sure "%a"

"%ere #s +o #+ or e5#"ra"#o+ o a#r

Use o %a+, 3o1es' 3o33es a+, sae"4 %eme"

Sae"4 a+, $re!au"#o+s s%ou, -e !o+su"e, rom "%e

o$era"#o+ ma+ua


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T)ERM;METERS

C;NTACT T)ERM;METER

Co+s#s"s o "/o ,#ss#m#ar me"as "%a" are jo#+e, "o3e"%er a"

o+e e+,

As "%e "em$. !%a+3es a" "%e ju+!"#o+ o "%e "/o me"as' a

1o"a3e #s $ro,u!e, "%a" !a+ -e !orrea"e, -a! "o "%e "em$.

Measures ue 3as' %o" a#r a+, %o" /a"er "em$. "%rou3% a

$ro-e #+ "%e s"ream

T%e our mos" !ommo+ !a#-ra"#o+s are ?' &' T a+, E' a+,

"%ose or %#3% "em$era"ure !a#-ra"#o+s #+!u,e R' S' C a+, GB


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CONT…

• Tem$era"ures are 3e+era4 re!or,e, or a#r

!o+,#"#o+#+3 u+#"s' -o#ers' ur+a!es' s"eam s4s"ems'

/as"e %ea" re!o1er4 s4s"ems a+, %ea" e5!%a+3ers

• T%e $ro-e or -u- %as "o -e #+ser"e, #+"o "%e u#, or

3ases "%a" are "o -e measure,


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PRECAUTIONS

• T%e $ro-e mus" -e #mmerse, #+ "%e u#, a+, "%e

measureme+" mus" -e "ae+ a"er @2 m#+u"es

•T%e ra+3e or /%#!% "%e "%ermo!ou$e #s ma,e ors%ou, -e +o"e, -eore%a+,

• T%e $ro-e o "%e "%ermo!ou$e s%ou, +e1er "ou!%

"%e +ae, ame

• T%e em#ss#1#"4 s%ou, -e se" a!!or,#+3 "o "%e sura!e/%ere "%e "em$era"ure #s "o -e measure,


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SPEED MEASUREMENT

TACHOMETERS (CONTACT TYPE):

• Use, "o measure "%e s$ee, o ro"a"#o+ o a mo"or or $ue4 e"!

• T%e /%ee #s -rou3%" #+ !o+"a!" /#"% "%e ro"a"#+3 -o,4 "%a" ,ue

"o "%e r#!"#o+ o-"a#+s "%e same s$ee,

STROBOSCOPE:

• T%#s #s a 1ersa"#e as%#+3 #3%" sour!e use, "o

• a measure "%e s$ee, o as"mo1#+3 o-je!"s or

• - "o $ro,u!e "%e o$"#!a ee!" o s"o$$#+3 or so/#+3 ,o/+%#3%s$ee, mo"#o+ or o-ser1a"#o+' a+a4s#s' or %#3%s$ee,

$%o"o3ra$%4


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PRECAUTIONS

• W%#e us#+3 a !o+"a!" "4$e "a!%ome"er' !are

s%ou, -e "ae+ /%#e -r#+3#+3 "%e /%ee o "%e

"a!%ome"er #+ !o+"a!" /#"% "%e ro"a"#+3 -o,4

• Loose !o"%#+3 s%ou, +e1er -e /or+ /%#e

"a#+3 measureme+"s /#"% a "a!%ome"ers

• Ta#+3 measureme+"s ao+e s%ou, -e a1o#,e,


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LEAK DETECTORS

• De"e!"s "%e u"raso+#! sou+, o a ea

• As o+3 as "%e ea #s "ur-ue+"' "%ere /# -e e+ou3%

sou+, "o ,e"e!" #" u"raso+#!a4• A ea "es" !a+ -e ,o+e #+ a+ e+!ose, area /%#!% #s

sa"ura"e, /#"% rer#3era+"

• T%e ee!"ro+#! $ro!ess heterodyning !o+1er"s "%e

%#3% re:ue+!4 ea sou+, "o a o/er ra+3e


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PRECAUTIONS

• Dus" or smoe s%ou, +o" !ome ou" o "%e $#$e

• A1o#, measureme+" a" "%e $a!es /%ere sou+, e1e

#s %#3%

• Sae"4 $re!au"#o+s s%ou, -e !o+su"e, rom "%e

o$era"#o+ ma+ua


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LU METERS

• Co+s#s" o a -o,4' a $%o"o !e a+, a rea,ou"

• L#3%" e+er34 #s "ra+serre, -4 "%e $%o"o !e #+"o

a+ ee!"r#! !urre+" "%a" "%e me"er !a!ua"es "o"%e a$$ro$r#a"e 1aue o Lu5 or (oo" !a+,es

• A s"a+,ar, !oor !a+ -e reerre, "o as !oor

"em$era"ure a+, #s e5$resse, #+ ,e3rees &e1#+

• T%e rea,#+3s /# 1ar4 /#"% ,#ere+" #3%" sour!es


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PRECAUTIONS

• T%e se+sor s%ou, -e $ro$er4 $a!e, o+ "%e

/ors"a"#o+

•

Due #"s %#3% se+s#"#1#"4' "%e se+sor s%ou, -e e$"sae4

• Sae"4 a+, $re!au"#o+s s%ou, -e !o+su"e, rom "%e

o$era"#o+ ma+ua


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THANK YOU

Electrical Variable Measurements

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