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  3. ML20f

CMA ML20f User guide

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CURRENT&SENSOR&ML20F!
USER’S!GUIDE!
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CENTRE FOR MICROCOMPUTER APPLICATIONS
http://www.cma-science.nl
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Short!description!
56*!'())*+,!.*+./)!"#$%&!3.!7!8* +* )79:;();/.*! .*+./)!,/! <*7.()*!=())*+,.!3+!>'! 7+4!
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@7+7+7!;9(8.!7+4!,A/!7443,3/+79!799387,/)!=93;.!7)*!4*93G*)*4!A3,6!,6*!.*+./)D!
56*! '())*+,! .*+./)!.6/(94!@*!;97=*4! 3+! .*)3*.! A 3,6 ! ,6 *! =3)=(3,! =/<;/+ *+ ,! ,6 )/ (8 6 !
A63=6!,6*!=())*+,!A399!@*!<*7.()*4D!'())*+,.!3+!*3,6*)!43)*=,3/+!=7+!@*!<*7.()*4D!!
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7.!;/..3@9*!,/!,6*!=3)=(3,D!56*!.*+./)!3.!;)/,*=,*4!.(=6!,67,!=())*+,.! (;! ,/!I!>!A399!+/,!
47<78*!,6*!.*+./)J!@(,!3,!.6/(94!+*G*)!@*!(.*4!&/)!6386*)!=())*+,.D!!
56*! '())*+,! .*+./)! 3.! 7+! K$'! 4383,79! .*+./)J! A63=6! 83G*.! =793@)7,*4! G79(*.! /&! ,6*!
<*7.()*4! E(7+,3,HD! 563.! .*+./)! =7+! /+9H! @*! =/++*=,*4! ,/! .;*=379! 3+,*)&7=*.! ,67,!
.(;;/),!K$'!4383,79!.*+./).!93L*!,6*!'">!"/#7@!3+,*)&7=*D!56*!.*+./)!=7@9*!+**4*4!
,/!=/++*=,!,6*!.*+./ )!,/!7+!3+,*)&7=*!3.!+/,!.(;;93*4!A3,6!,6*!.*+./)!M.*+./)!=7@9*.!
7)*!.(;;93*4!A3,6!3+,*)&7=*.ND!!
Sensor!specifications!
O/)!.7<;93+8!)7,*.!(;!P!LQR!MP%%%!.7< ; 9*. !;* )!.*= /+ 4 N!,6 *!' ())* +,!. *+ ./ )!A /)L. !7.!7 !
4383,79! .*+./)!7+4!=/+G*),.!,6*!<*7.()*4!=())*+,!,/!7!4383,79!G79(*!G37!PF:@3,!7+79/8:
,/:4383,79!=/+G*).3/+D!O/)!.7<;93+8!)7,*.!7@/G*!P!LQR!,6*!.*+./)!A/)L.!7.!7+!7+79/8!
.*+./)D! >+! 7+79/8! .38+79! 8*+*)7,*4! @H! ,6*! .*+./)! M/+! 3,.! >?'! ;3+N! 3.! )*74! @H! ,6*!
=/++*=,*4!3+,*)&7=*! 7 +4!3.!=/+G*),*4!,/!7!4383,79!G79(*!@H!,6*!P$:@3,! >?!=/+G*),*)!/+!
,6*! 3+,*)&7=*D! 56*! < 7S3< ( < ! .7<;93+8! )7,*! /&! ,6*! .*+./)! 3. ! P%%! LQ R! M.7<;9*.! ;*)!
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Practical!information!
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CAUTION:!
• NEVER!connect!a!Current!sensor!directly!across!a!battery!or!power!supply,!
without!a!resistor!to!limit!the!current!within!the!range!of!the!sensor.!!
Failure!to!limit!the!current!will!cause!permanent!damage!to!the!sensor.!
• NEVER!use!high!voltages!or!household!AC.!
• 56*!'())*+,!.*+./)!.6/(94!@*!;97=*4!in!series!A3,6!,6*!=3)=(3,!=/<;/+*+,!,6)/(86!
A63=6!,6*!=())*+,!3.!,/!@*!<*7.()*4D!!
• "7L*!.()*!H/(!/@.*)G*!,6*!=/))*=,!;/97)3,HJ!3D*D!=/++*= ,!,6 *!@ 97=L!9* 74 !&)/<!,6*!
'())*+,!-*+./)!,/!,6*!+*87,3G*!,*)<3+79!/&!,6*!=*99.J!/,6*)A3.* ! ,6*!.*+./)!A 3 99 ! 8 3G * !
)*743+8.!A3,6!,6*!A)/ + 8!.38 +D!!
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Collecting!data!!
563.! '())*+,! .*+./)! A/)L.! /+9H! A3,6! .;*=3&3=! 3+,*)&7=*.D! 56*! .*+ ./)! A 399! @*!
7(,/<7,3=799H! 4*,*=,*4! A6*+! =/++*=,*4! ,/! .(=6! 7+! 3+,*)&7=*D! O/)! 4*,739*4!
3+&/)<7,3/+! 7@/(,! <*7.()*<*+,.! A3,6! .*+./).! =/+.(9,! ,6*! 0.*)! "7+(79.! /&! ,6*!
3+,*)&7=*!7+4!,6*!'/7=6!T!./&,A7)*D!!
Calibration!!
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<*</)HD!!!
Suggested!experiments!!
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• "*7.()*<*+,.!/&!3+,*)+79!)*./+7+=*!7+4!V"OD!!
• "*7.()*<*+,.!3+!.*)3*.!7+4!;7)799*9!*9*=,)3=79!=3)=(3,.D!!
• 5/8*,6*)! A3,6! 7! W/9,78*! .*+./)! 3,! =7+! @*! (.*4! ,/! *S;9/)*! ,6*! )*97,3/+.63;!
@*,A**+!,6*!=())*+,!7+4!,6*!G/9,78*!3+!*9*=,)3=79!=3)=(3,.D!
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3+!.*)3*.!A3,6!7!)*.3.,/)!,/!<*7.()*!,6*!
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O38()*!$D!!'/<@3+3+8!,6*!'())*+,!7+4!W/9,78*!.*+./).X!
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7=)/..!7!#V?D!
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Technical!Specifications!
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Sensor!kind!
0;!,/!P%%%!QR!:!4383,79!!
M/+:.*+./)!7+79/8!,/!4383,79!=/+G*).3/+N!!
MPF:@3,.!)*./9(,3/+J!=/<<(+3=7,3/+!G37!K$'N!
>@/G*!P%%%!QR!:!7+79/8!!
M/+:3+,*)&7=*!7+79/8!,/ !4 383,7 9!=/ +G *).3/ + N!!
Measuring!range!!
?3&&*)*+,379!:B!DD!CB!>!
Resolution!!
PF:@3,J!Y!%DI!<>!!
Accuracy!!
5H;3=79!Y!%DB!Z!7+4!"7S3<79!Y!P!Z!7,!&(99!)7+8*!
Max.!over!current!protection!!
Y!I!>!
Max.!voltage!input!and!!
Max.!over!voltage!protection!
Y!PI!W!
Y!B%!W!
Resistance!between!inputs!
%D%P![!\!$]!!
Zero!offset!!
^*)/:G/9,78*!/&&.*,!4)3&,U!,H;3=79!Y!P!<>!7,!$I_'!
Maximal!sampling!rate!!
P%%!LQR!
Sensor!dimensions!
Q/(.3+8U!F$!S!P`!S!PT!<<!!
V9*=,)3=!=/)4.U!9*+8,6!BI!=<X!437<*,*)!B!<<!
Connection!
I:;3+.!<3+3!a7=L!;9(8!
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Warranty:!!
56*! '())*+,! .*+./)! "#$%&! 3.! A7))7+,* 4 ! ,/! @*! &)**! &)/<! 4*&*=,.! 3+! <7,*)379.! 7+ 4 !
A/)L<7+.63;!&/)!7!;*)3/4!/&!P$!</+,6.!&)/<!,6*!47,*!/&!;()=67.*!;)/G34*4!,67,!3,!
67.!@**+!(.*4!(+4*)!+/)<79!97@/)7,/)H!=/+43,3/+.D!563.!A 7))7+,H!4/*.!+/,!7;;9H!3&!
,6*!.*+./)!67.!@**+!4 7< 78 *4 !@H!7==34 *+ ,!/)!< 3.( .*D!!
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Note:!This!product!is!to!be!used!for!educational!purposes!only.!It!is!not!appropriate!
for!industrial,!medical,!research,!or!commerc ial!app licatio ns.! !! ! ! !
Rev. 15/05/2013
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