Xylem Multi 3420 - Manual (Page 47)

Multi 3420 Operation
47 ba75864e11 02/2011
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 section 4.7.3).
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 section
4.7.8). Subsequently, you can transmit the displayed calibration data to
the interface, e. g. to a 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
(-59.2 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.