Metrohm 719 S Titrino User Manual

Page 23

2.4

Tutorial

719 S Titrino

If the previous titration has run to your satisfaction, you can start thinking about perform-

ing statistics calculations. Have you already added a new sample to the titration vessel? If

you are no longer certain, you can find out immediately with .

Rapid measurement between titrations

Press . The pH value of your sample is displayed. You can stop the

measurement with a second .

Statistics calculations
Now switch on the statistics calculations. Press . The "Statistics" LED is

on. Duplicate determinations are now performed.

• Perform 2 titrations.

After the second titration you receive a printout with statistics calculations:

If you have no printer connected, you can view the mean value and standard deviation:
• Press again, the display "display std.deviation" appears. Once

again, you can view this value, by pressing .

Perhaps you have noticed that the two values differ too greatly? In any case, we shall per-

form a third determination with the same sample. The result of this determination will be

another value which is incorporated in the statistics calculations.

Addition of more determinations for the statistics calculations

5 ×

• Press until the display shows:

• Statistics calculations can be switched on either with

the key or in the inquiry "status:".

We shall leave them switched on and proceed to the

next inquiry.

parameters

>statistics

status: ON

'fr

719 S Titrino 18200 719.0021

date 2002-03-13 time 17:34 3

pHc(init) 6.29 SET pH Acid

EP1 0.0628 ml 4.26

m value 5.02 mmol/l

mean(2) +/s s/%

m value 5.04 0.028 mmol/l 0.56

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