wtw inoLab pH/ION Level 2 Operating Manual page 21

Calibration
evaluation
Preparatory
activities
After the calibration, the instrument automatically evaluates
the current status. The asymmetry and slope are separately
evaluated. The worst evaluation appears on the display.
Display
Clean the electrode
according to the electrode
operating manual
E3
Clear the fault according to
chapter 6 W
HAT TO DO IF
1 Switch on the instrument by pressing
2 Connect the pH electrode to the instrument.
3 Keep the buffer solutions ready.
4 Adjust the temperature of the solutions and measure
the current temperature if the measurement is
performed without a temperature probe.
Asymmetry
[mV]
-15 ... +15
-20 ... +20
-25 ... +25
-30 ... +30
< -30 or
> 30
...
Operation
Slope [mV/
pH]
-60.5 ... -58
-58 ... -57
-61 ... -60.5
or
-57 ... -56
-62 ... -61
or
-56 ... -50
< -62 or
> -50
e
.
105