wtw inoLab Level 3 - Page 77

pH
77
Sample printout:
Calibration
evaluation
After the calibration, the measuring module automatically
evaluates the current status of the system. The asymmetry
and slope are evaluated separately. The displayed probe
symbol shows the worse-case evaluation of both variables.
.
pH calibration
Cal Date: 05.12.1999
Cal Time: 22:46
Cal Interval: 7 days
AutoCal TEC Tman AR
Buffer 1 2.00
Buffer 2 4.01
Buffer 3 7.00
Buffer 4 10.00
C1 290.6 mV 25°C
C1 174.5 mV 25°C
C1 0.2 mV 25°C
C1 -174.6 mV 25°C
S -58.2mV/pH
ASY 0 mV
Sensor +++
User: xxxxxx
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
14 W
HAT TO DO IF...
< -30 or
> 30
... -62 or
... -50