wtw Multi 3430, Operating Manual

Page: 45 / 102

Multi 3430 Operation
45 ba75865e02 12/2009
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 39).
Stability control The calibration procedure automatically activates the stability control
function. The current measurement with stability control can be termi-
nated at any time (accepting the current value).
Calibration record The new calibration values are displayed when a calibration procedure
is completed.
Display calibration data
and output to interface
You can have the data of the last calibration displayed (see page 54).
Subsequently, you can transmit the displayed calibration data to the
interface, e. g. to a PC, with the
<PRT> key.
Note
The calibration record is automatically transmitted to the interface after
calibrating.
Determined val-
ues Displayed calibration data
1-point Asy
z
Zero point = Asy
z
Slope = Nernst slope
(-59.2 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.