CMA Dishmachines PH SENSOR BT61i User Manual

PH!SENSOR!BT61i!

USER’S!GUIDE!

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CENTRE FOR MICROCOMPUTER APPLICATIONS

http://www.cma-science.nl

2!|!BT61i!pH!Sensor!User’s!Guide!!

Short!description!

The! CMA! pH! Sensor! is! a! general;purpose! pH! measurement! system! that! allows!
measuring!the!degree!of!acidity/pH!value!of!a!solution!in!the!range!between!0!and!14.!
The!sensor!consists!of!a! pH!amplifier!and!pH!electrode .!The!pH!Electrode!(031)!is!not!
delivered!with!the!pH!sensor!and!has!to!be!purchased!separately.!!

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The!pH!Sensor! can!be! directly! connected!to! analog!BT!inputs! of!the!CMA! interfaces.!
The!sensor! cable! BT! ;! IEEE1394! needed!to! connect!the! sensor! to! an! interface!is! not!
supplied!with!the!sensor!and!has!to!be!purchased!separately!(CMA!Article!BTsc_1).!!

Sensor!recognition!!

The!pH! Sensor! has!a! memory!chip! (EEPROM)! with! information! about! the! sensor:!its!
name,! measured! quantity,! unit! and! calibration.! Through! a! simple! protocol! this!
information!is!read!by!th e!CMA!interfaces!and!the!sensor!is!automatically!recognized!
when!it!is!connected!to!these!interfaces.!!!
If!your!pH!Sensor!is! not!automa tically! detected !by!an!interface!you!have!to!manually!
set!up!your!sensor!by!selecting!it!from!the!Coach!Sensor!Library.!!

pH!Amplifier!!

The! CMA! pH! amplifier! is! a! device,! which! allows! a!
standard! combination! pH! electrode! (such! as! the!
CMA!pH! Electrode!(031))! to! be! monitored!by! a! lab !
interface.!The! pH!electrode! is ! connected! to! the!pH!
amplifier!via!BNC! connector!located! on!one! end! of!
the!sensor!box.!The!pH!amplifier!adjusts!the! voltage!
produced!by!the! pH!electrode!to!a!range!between!0!
to!5!V,!which!can!be!measured!by!an!interface.!
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pH!Electrode!!!

The! CMA! pH! electrode! is! designed! to! make!
measurements! in! the! pH! range! of! 0! to! 14.!!
It! has! a! coax! cable,! with! a! BNC! con n ec to r.! !
The!electrode!(made!from!glass)!is!built!in!a!plastic!
tube! with! an! opening! at! the! bottom! side.! It! is!
supplied!in!a!bottle!filled!with!a!protective!solution.!
When!the!pH!electrode!is!not!being!used,!it!must!be!
kept!in! this!liquid.! For! use!and! maintenance!of!the!
CMA! pH! electrode! follow! instructions! given! in! its!
User’s!Guide.!!

Figure!1.!The!pH!Amplifier!(BT61i).!!

Figure!2.!The!pH!Electrode!(031).!