Mettler Toledo SevenGo pro Mode D'emploi page 33

On display
X.XXX
X.XX
X.X
X
In the ion mode, the measurement resolution depends on the concentration and the unit of the
mea s ured ion.
2. Stability Criterion
The Stability icon appears according to the following stability criteria:
Stability criteria for pH and mV measurement
Strict
The measured signal should not change by more than 0.03 mV in 8 seconds or by more than
0.1 mV in 30 seconds.
Medium
The measured signal should not change by more than 0.1 mV in 6 seconds.
Fast
The measured signal should not change by more than 0.6 mV in 4 seconds.
Stability criterion for ion measurement
Strict
The measured signal should not change by more than 0.03 mV in 12 seconds or by more than
0.08 mV in 26 seconds.
Medium
The measured signal should not change by more than 0.08 mV in 8 seconds.
Fast
The measured signal should not change by more than 0.3 mV in 4 seconds.
3. Ion Measurement Units
The unit (mmol/L, mol/L, ppm, mg/L or %) for measurements and calibration can be defined.
In some cases, changing units requires the user to first recalibrate before starting a measurement,
oth e r w ise an error message will appear.
The units of measurement are divided into two groups: 1. mmol/L, mol/L and 2. ppm, mg/L, %.
Chang i ng within a group doesn't require recalibration, but changing between the two groups does.
4. Rel. mV Offset
In the rel. mV mode the offset value is subtracted from the measured value. Either an offset value
can be entered or it can be determine by measuring the mV of a reference sample.
1) Enter offset value
51710917_V02.2011_BA_SG9_98_EnFrEs.indb 29
Description
three decimal places
two decimal places
one decimal place
no decimal places
Option
pH
pH
pH, mV
mV
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21.04.2011 11:46:12