J.P. SELECTA MP-2006 Manual De Instrucciones página 90

Press 'END' to finish known addition concentration measuring and return to start mode.
4.6.3.2.1 Blank Concentration Calibration in Known Addition Mode Measuring
Before measurement, if you want to make blank concentration calibration, press 'BLANK' key,
select 'Cali Blank Conc' and then press 'ENTER' key, meter displays 'Cali Blank Conc?', press
'ENTER' to start blank concentration calibration.
When meter enters into blank concentration calibration, the display and operation is absolutely the
same as 'known addition Measuring Mode'. When measurement finishes, you can press 'END' to
return to current parameter setting mode.
4.6.3.2.2 Clear Blank Concentration
If you want to clear previous blank concentration value, you can press 'BLANK' key, select 'Cali
Blank Conc?' and then press 'ENTER' to clear blank concentration value to zero.
.3.3 Sample Addition Mode
4.6
This mode is similar with 'Known Addition Mode'. The only difference is in standard adding
method, to add standard solution into sample and measure the electrode potential changes caused
by concentration changing of measured groups and enhance measure the concentration of sample.
Similarly, if you add sample into standard solution, you can measure the concentration of sample
through measuring the potential changes before and after adding. The formula is as follows:
 
Cx Cs
In which: Ｃx～ concentration value of measured sample (adding solution)
Ｃs～ concentration value of standard solution
ρ～ standard solution volume(Vs)/measured sample volume(Vx)
Ｅ1～system potential value when measured sample is not added.
Ｅ2～ system potential when measured sample is added
S～ electrode slope
You can select relevant ion mode according to ion electrode used (For example, if you want to
measure Na ion concentration, you can select ion mode is Na ion, please refer to chapter 'Setup
Ion Mode' for details). Set measuring parameter as ion concentration and select 'Sample Addition
Mode' (please refer to chapter 'Setup Measuring Mode), When selection finishes, press 'MEAS'
key to start the measuring. Or you can press 'ENTER' to return to start mode. Under start mode,
press 'MEAS' key, you can also make concentration measuring which displayed as follows:

   
( 2 1 / )
[( 1 ) 10
E E S

]
Parameter setting in Sample Addition
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