Xylem HandyLab 100 - Manual (Page 35)

HandyLab 100 Operation
35 ba77062d01 03/2014
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 30).
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 the calibration is fin-
ished.
Display calibration data You can have the data of the last calibration displayed (see page 44).
Calibration evaluation After calibrating, the meter automatically evaluates the calibration.The
zero point and slope are evaluated separately. The worse evaluation of
both is taken into account. The evaluation appears on the display and
in the calibration record.
Determined val-
ues Displayed calibration data
1-point Asy  Zero point = Asy
 Slope = Nernst slope
(-59.2 mV/pH at 25 °C)
2-point Asy
Slp.  Zero point = Asy
 Slope = Slp.
3-point to
5-point Asy
Slp.  Zero point = Asy
 Slope = Slp.
The calibration line is calculated
by linear regression.
Display Calibration
record Zero point
[mV] Slope [mV/
pH]
+++ -15 ... +15 -60,5 ... -58
++ -20 ... +20 -58 ... -57