Xylem VARIO WATERPROOF PH METER - Manual (Page 23)

VARIO pH Operation
23 ba75373e04 07/2006
Note
If the slope (SLO) is indicated on the display, you can change the unit of the
slope with <
" > [<mV/pH or %>].
The display in % refers to the Nernst slope, 59.2 mV/pH
(100 x the slope determined/Nernst slope).
AutoRead
(drift control)
The AutoRead function is activated when the measurement of a buffer is
started. The display of the unit flashes during the AutoRead measurement.
The current AutoRead measurement can be terminated at any time
(accepting the current value) by pressing <
g >.
Calibration data The calibration data is stored in the short pH electrode or adapter. It contains
the values for the slope and asymmetry of the current calibration. It is
displayed after a valid calibration and is accessible at any time.
Calibration status The meter has a simple display of the calibration status.
Determined values Displayed calibration data
1-point ASY z Asymmetry = ASY
z Slope = Nernst slope
(59.2 mV/pH at 25 °C)
2-point ASY
SLO z Asymmetry = ASY
z Slope = SLO
3-point ASY
SLO z Asymmetry = ASY
z Slope = SLO
The calibration line is calculated
by linear regression.
Display indication Calibration status
A valid calibration is available.
flashes
A valid calibration is available. The calibration
interval has expired, measurements are still
possible.
No probe symbol on
the display. There is no valid calibration. Measuring with the
delivery settings is possible (e.g. during the initial
commissioning of a short pH electrode or after a
reset).