Xylem handylab pH 12 User Manual
Page 22
Operation
handylab pH 12
22
ba75368e04
01/2011
Calibration
evaluation
After the calibration, the measuring instrument automatically evaluates the
current status of the electrode. The asymmetry and slope are evaluated sep-
arately. The worst evaluation appears on the display.
Preparatory
activities
Display
Asymmetry
[mV]
Slope
[mV/pH]
-15 ... +15
-60.5 ... -58
-20 ... +20
-58 ... -57
-25 ... +25
-61 ... -60.5
or
-57 ... -56
Clean the electrode according
to the electrode operating
manual
-30 ... +30
-62 ... -61
or
-56 ... -50
E3
Eliminate the error according to
chapter 6 W
< -30 or
> 30
< -62 or
> -50
1
Switch on the measuring instrument with <ON/OFF>.
2
Connect the pH electrode to the measuring instrument.
3
Keep the buffer solutions ready.
4
Adjust the temperature of the solutions and measure the cur-
rent temperature if the measurement is made without temper-
ature sensor.