Xylem ProLab 1000 BENCH TOP pH METER - Manual (Page 44)

Operation ProLab 1000
44 ba75576e04 01/2011
Calibration points Calibration can be performed using one to five buffer solutions in any
order (single-point to five-point calibration). The meter determines the
following values and calculates the calibration line as follows:
Note
You can display the slope in the units, mV/pH or % (see page 31).
Stability control The calibration procedure automatically activates the stability control
function.
The current measurement with stability control can be terminated at
any time (accepting the current value).
Calibration record When finishing a calibration, the new calibration values are displayed
as an informative message ([
i] symbol) first. Then you can decide
whether you want to take over these values of the new calibration or
whether you want to continue measuring with the old calibration data.
After accepting the new calibration values the calibration record is
displayed.
Display of calibration
data and download to
interface
You can have the data of the last calibration displayed (see page 68).
Subsequently, you can transmit the displayed calibration data to the
interface, e. g. to a printer or PC, with the key.
Note
The calibration record is automatically transmitted to the interface after
calibrating.
Determined
values Displayed calibration data
1-point ASY z Zero point = ASY
z Slope = Nernst slope
(-59.16 mV/pH at 25 °C)
2-point ASY
SLO z Zero point = ASY
z Slope = SLO
3-point to
5-point ASY
SLO z Zero point = ASY
z Slope = SLO
The calibration line is calculated
by linear regression.