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BT78i

CMA BT78i User guide

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SALINITY!SENSOR&BT78i!
USER’S!GUIDE!
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CENTRE FOR MICROCOMPUTER APPLICATIONS
http://www.cma-science.nl
2!|!"#$%&!'()&*&+,!-.*-/0!1-.02-!34&5.!!
Short!description!
#6.!'()&*&+,!-.*-/0!"#$%&!7.(-40.-!+6.!-()&*&+,!/8!(!-/)4+&/*!&*!+6.!0(*9.!80/7!:!+/!;:!
<<+=!#6.!'()&*&+,!-.*-/0!>/*-&-+-!/8!(!'()&*&+,!.).>+0/5.!(*5!(*!(7<)&8&.0=!!
'()&*&+,!&-!+6.!7.(-40.!/8!())!+6.!-()+-!5&--/)?.5!&*!@(+.0=!'()&*&+,!&-!/8+.*!.A<0.--.5!
(-!<(0+-!<.0!+6/4-(*5!B<<+CD!@6&>6!&-!(<<0/A&7(+.),!.E4()!+/!90(7-!/8!-()+!<.0!)&+.0!/8!
-/)4+&/*=!#6.!(?.0(9.!/>.(*!-()&*&+,!&-!F;!<<+
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!(*5!+6.!(?.0(9.!0&?.0!@(+.0!-()&*&+,!&-!
:=;!<<+!/0!).--=!!
#6.! HIJ! '()&*&+,! -.*-/0! >(*! K.! 5&0.>+),! >/**.>+.5! +/! +6.! (*()/9! "#! &*<4+-! /8! +6.!
HIJ!&*+.08(>.-=!#6.!-.*-/0!>(K).!"#!L!MNNNGFO P!*..5.5!+/!>/**.>+!+6.!-.*-/0!+/!(*!
&*+.08(>.!&-!*/+!-4<<)&. 5!@&+6!+6.!-.*-/0!( *5 !6(-!+/!K.!<40>6 (- .5 !-.<(0(+.),!BHI J !
J0+&>).!"#->QGC=!!
Sensor!recognition!
#6.! '()&*&+,!-.*-/0!6(-!(!7.7/0,! >6&<!BNNRSTIC!@&+6!&*8/07(+&/*!(K/4+!+6.! -.*-/0U!
&+-! *(7.D! 7.(-40.5! E4 (* +&+,D! 4* &+! (*5 ! >()&K 0( +&/* =! #6 0/4 96 ! (! -&7 < ).! < 0/+/ >/ )! +6 &-!
&*8/07(+&/*! &- !0.(5!K,!+6.!HIJ!&*+.08(>.-!(*5!+6.!-.*-/0!&-!(4+/7(+&>()),!0.>/9*&V.5!
@6.*!&+!&-!>/**.>+.5!+/!+6.-.!&*+.08(>.-=!!!
M8! ,/40! '()&*&+,! -.*-/0! &-! */+! (4+/7(+&>()),! 5.+.>+.5! K,! (* ! &*+. 08(>. ! ,/4 ! 6(? .! +/!
7(*4()),!-.+!4<!,/40!-.*-/0!K,!-.).>+&*9!&+!80/7!+6.!H/(>6!'.*-/0!W&K0(0,=!!
How!the!sensor!works!
#6.! -.*-/0! 5.+.07&*.-! -()&*&+,! K(-.5! /*! .).>+0&>()! >/*54>+&?&+,=! #6.! -()&*&+,! <0/K.!
7.(-40.-! 6/@! 74>6! .).>+0&>()! >400.*+! 8)/@-! +60/496! +6.! @(+.0=! X(+.0! +6(+! 6(-!
5&--/)?.5!-()+! &*! &+!@&))!>/*54>+! .).>+0&>&+,!K.++.0! +6(*! @(+.0!@&+6!*/!5&--/)?.5!-()+=!
#6.! 7/0.! -()+! +6(+! &-! 5&--/)?.5! &*! +6.! @(+.0D! +6.! K.++.0! +6.! @(+.0! @&))! >/*54>+!
.).>+0&>&+,=!'()&*&+,!&-!+6.*!>()>4)(+.5!80/7!+6.!7.(-40.5!>/*54>+&?&+,!?()4.=!
#6.! -.*-/0! 6(-! (! K4&)+! &*! >/7<.*-(+&/*! 8/0! >6(*9.- ! &*! >/*54>+&?&+,! 5 4 .! +/!
+.7<.0(+40.=!
Calibration!!
#6.! HIJ! '()&*&+,! '.*-/0! "#$%&! &-! - 4 << )&.5 ! >()&K0(+.5=! #6.! /4+<4+! /8! +6.! -.*-/0! &-!
)&*.(0!@&+6!0.-<.>+!+/!+6 .!-()&*&+,=!!#6.!-4<<)&.5!>()&K0(+&/*!84*>+&/*!&-U! !
! ! '()&*&+,!B<<+C!Y!GZ=F[;!\!]
/4+!
B]C!
!
#6.!H/(>6!<0/90(7!())/@-!-.).>+&*9!+6.!>()&K0(+&/*!-4<<)&.5!K,!+6.!-.*-/0!7.7/0,!
BNNRSTIC!/0!+6.!>()&K0(+&/*!-+/0.5!&*!+6.!H/(>6!'.*-/0!W&K0( 0,=!#6.!H/(>6!<0/90(7!
())/@-!-6&8+&*9!+6.!<0.L5.8&*.5!>()&K0(+&/*!/0!>0.(+&*9!(!*.@!+@/L</&*+!>()&K0(+&/*!&8!
*..5.5=!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
1
"35"grams"of"salt"per"1"liter"ocean"water"
"#$%&!'()&*&+,!-.*-/0!1-.02-!34&5.! |!3!
• Zero!calibration!point!!
^..<!+6.!-()&*&+,!<0/K.!/4+!/8!(*,!-/)4+&/*!.=9=!&*!(&0=!H())!+6&-!?()4.!:!<<+=!
• Standard!solution!calibration!point!
R)(>.!+6.! -( )&* &+,!<0/K.!&*+/!(!-+(*5(05!-/)4+&/*!.=9=!F;!<<+!(*5!@(&+!8/0!+6.!?()4.!
+/!-+(K&)&V.=!N*+.0!+6.!?()4.!/8!+6.!-+(*5(05!-/)4+&/*!F;!<<+=!
!
#/!<0.<(0.!(!-/)4+&/*!@&+6!-()&*&+,!?()4.!/8!F;!<<+!(+![;_HU!!
• R/40!;::!7W!/8!5&-+&)).5!@(+.0!&*+/!(!>/*+(&*.0=!!
• J55! FF=:F! 9! -/5&47! >6)/0&5.! B`(H)C! (*5! -+&0! +6.! 7&A+40.! 4*+&)! ())! -()+! 6(-!
5&--/)?.5=!
• J55!.*/496!5&-+&)).5!@(+.0!+/!7(a.!G!W!/8!-/)4+&/*!BG:::!7WC=!!
Taking!measurements!!
#/!+(a.!7.(-40.7.*+-!@&+6!+6.!'()&*&+,!-.*-/0U!!
• '/(a!+6.!+&<!/8!+6.!'()&*&+,!.).>+0/5.!&*!5&-+&)).5!@(+.0!8/0!(K/4+!G:!7&*4+.-=!M8!+6&-!
&-!*/+!</--&K).D!0&*-.!+6 .!+&< !+6 /0/ 4 96 ),!@ &+6!5 &-+&)). 5!@ ( +.0=!!
• X&<.! +6.! /4+.0! <(0+! /8! +6.! .).>+0/5.! K/5,! @&+6! (! >).(*! <(<.0! +/@.)=! '6(a.!
?&9/0/4-),!+/!0.7/?.!(*,!50/<).+-!80/7!+6.!>.))!>6(7K.0=!!
• R)(>.! +6.! '()&*&+,! .).>+0/5.! &*! +6.! -(7<).! +/! K.! +.-+.5=! #6.! -(7<).! 74-+! K.! (+!
).(-+!F!>7!5..<!+/!.* -4 0.!+6 .!> .))!>6 ( 7 K. 0!&-!84 )),!-4 K7.09.5=!
• '+&0!+6.!-/)4+&/*!9.*+),D!@(&+!8/0!G:!-.>/*5-!+/!())/@!+6.!0.(5&*9-!+/!-+(K&)&V.=!
• M8! ,/4! (0.! +( a&* 9! 0.(5&*9-! &*! (! -/)4+&/*! +6(+! 6 (- ! (! +.7<.0(+40.! K. )/ @ ! G:
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H! /0!
(K/?.!F;
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HD!())/@!7/0.!+&7.!8/0!+6.!0.(5&*9-!+/!-+(K&)&V.=!
• H).(*! +6/0/496),! (8+.0! +6.! 7.(-40.7.*+! &-! >/7<).+.5! +/! (?/&5 ! (*,!
>/*+(7&*(+&/*!8/0!+6.!.).>+0/5.2-!*.A+!4-.=!#6.!<0/K.!>(*!+6.*!K.!-+/0.5!50,=!
!
!
WARNING:!
• Do*not!<)(>.!+6.!-()&*&+,!.).>+0/5.!&*!?&->/4-D!/09(*&>!)&E4&5-D!-4>6!(-!6.(?,!/&)-D!
9),>.0&*!B9),>.0/)C!/0!.+6,).*.!9),>/)=!b/!*/+!<)(>.!+6.!<0/K.!&*!(>.+/*.!/0!*/*L
</)(0!-/)?.*+-D!-4>6!(-!<.*+(*.!/0!6.A(*..!
!
Using!the!Salinity!sensor!with!other!CMA!sensors!!
M+! &-! ?.0,! &7</0+(* +! +/! a*/@! +6(+! +6.! '()&*&+,! -.*-/0! @&))! &*+.0(>+! @&+6! /+6.0! HIJ!
-.*-/0-D! &8! + 6 . , ! (0. ! <) ( >. 5! &* ! +6. ! -( 7.! - /)4+&/*! (*5! (0.! >/**.>+.5! +/! +6.! -( 7.!
&*+.08(>.=! #6&-! -&+4(+&/*! (0&-.-! K.>(4-.! +6.! '()&*&+,! -.*-/0! /4+< 4 +-! (! -&9*()! &*! +6.!
-/)4+&/*D! (*5! +6&-! -&9*()! >(*! (88.>+! +6.! 0.(5&*9! /8! (*/+6.0! -.*-/0=! #6.! 8/))/@&*9!
-.*-/0-!>(**/+!K.!>/**.>+.5!+/!+6.!-(7.!&*+.08(>.!(*5!<)(>.5!&*!+6.!-(7.!-/)4+&/*-U!
• b&--/)?.5!/A,9.*!-.*-/0D!
• <c!-.*-/0D!!
4!|!"#$%&!'()&*&+,!-.*-/0!1-.02-!34&5.!!
• H/*54>+&?&+,!-.*-/0=!
I/0.!-.*-/0-!>(*!K.!>/**.>+.5!(+!+6.!-(7. !+&7.!+/!+6.!&*+.08(>.!K4+!/*),!/*.!( +!(!
+&7.!>(*!K.!<)(>.5!&*-&5. !+6.!-(7.!-/)4+&/*!+/!+(a.!0.(5&*9-=!
Suggested!experiments!!
#6.!'()&*&+,!-.*-/0!>(*!K.!4-.5!&*!+6.!8/))/@&*9!.A<.0&7.*+-U!
• I.(-40.7.*+-!/8!-()&*&+,!/8!@(+.0!-/40>.-=!
• I.(-40.!+6.!>6(*9.!&*!-()&*&+,!/8!-()+@(+.0!(-!+6.!@(+.0!.?(< / 0(+.- =!
• I/*&+/0!+6.! 0(+.! /8!0.(>+&/*! &*! (! >6.7&>()! 0.(>+&/*! &*! @6&>6! 5&--/)?.5! -()+L&/*-!
(*5!-/)4+&/*!>/*54 >+&?&+,!?(0&.-!@&+6!+&7.!54.!+/!(* !&/*&>!-<. >&.!K.&*9!>/*-47.5!
/0!<0/54>.5=!
Technical!Specifications!
!
Sensor!kind!
J*()/9D!9.*.0(+.-!(*!/4+<4+!?/)+(9.!K.+@..*!!
:!==!!;!]!
Measuring!range!!
:!==!;:!<<+!
Resolution!using!!
12!bit!AD!converter!
!
:=:[!<<+!!
Uncertainty!(accuracy)!!
#,<&>()!d![e!(8+.0!>()&K0(+&/*!(+![;_H!
Response!time!
O%e!/8!84))!->().!0.(5&*9!&*!;!-.>/*5-!
Temperature!range!
:_H!+/!%:_H!!
Temperature!compensation!
J4+/7(+&>!K.+@..*!;_H!(*5!F;_H!
Cell!constant!
G:!>7
LG
!
Connector!
MNNNGFOP!>/**. >+/ 0!8 /0!" # LMN N N GF OP!-.*-/0!>(K).=!!
'.*-/0!>(K).!*/+!5.)&?.0.5!@&+6!+6.!-.*-/0=!
Warranty:!!
#6.! '()&*&+,! -.*-/0! "#$%&! &-! @(00(*+.5! +/! K. ! 80..! 80/7! 5.8.>+-! &*! 7(+.0&()-! (*5!
@/0a7(*-6&<!8/0!(!<.0&/5!/8!G[!7/*+6-!80/7!+6.!5(+.!/8!<40>6(-.!<0/?&5.5!+6(+!&+!
6(-!K..*!4-.5!4*5.0!*/07()!)(K/0(+/0,!>/*5&+&/*-=!#6&-!@(00(*+,!5/.-!*/+!(<<),!&8!
+6.!-.*-/0!6(-!K..*!5 (7 (9 .5!K,!(>>&5.*+!/0!7&-4-.=!!
!
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. 20/11/2014
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