ProLab 2000
Operation
45
ba75577e03
11/2009
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 34).
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 87).
Subsequently, you can transmit the displayed calibration data to the
interface, e. g. to a printer or PC, with the
<PRINT>
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.