Metrohm 797 VA Computrace Manuel d'utilisateur télécharger pdf (Page 161)

5.8 Data processing and evaluation

797 VA Computrace – Software

149

• Determining the working range

The calibration curve is defined only for the range between the

calibration solutions with the lowest and highest mass concen-

trations. Extrapolations outside this range are not allowed.

• Keep temperature constant

Owing to the large temperature dependence of the measured

values (≥ 2%/°C), it is advisable to work with the 6.1418.220

thermostatted measuring vessel.

• Consideration of blank values

Any blank values must be determined separately and sub-

tracted by means of the formula in the CALCULATION window.

Formula calculation

The last step in the evaluation is the calculation of the calculation

formulae entered in the CALCULATION window for the output of

the Final results:

Without changing the default values for Multiplier, Divisor, and

Summand, the Final Result is calculated as the concentration

multiplied by the Cell volume and divided by the Sample amount.

The final result has the Final unit selected in the CALCULATION

window.

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Metrohm 797 VA Computrace Manuel d'utilisateur Page 161