wtw pH 3310 - Page 37

pH 3310 Operation
37
ba75802e02 12/2008
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 24).
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 The new calibration values are displayed when the calibration is
finished.
Display calibration and
output to interface
You can have the data of the last calibration displayed (see page 57).
Subsequently, you can transmit the displayed calibration data to the
interface, e. g. a PC, with the <F2>/[USB output] 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
Slp.
z Zero point = Asy
z Slope = Slp.
3-point to
5-point
Asy
Slp.
z Zero point = Asy
z Slope = Slp.
The calibration line is calculated
by linear regression.