Xylem ProLab 3000 Manual do Utilizador Página 76

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pH ProLab 3000
76
ba75645e03 12/2012
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.
Preparatory activities Perform the following preparatory activities when you want to calibrate:
Display Calibration
record
Zero point
[mV]
Slope
[mV/pH]
+++ - 18 ... + 18 -60.5 ... -57.5
++ - 22 ... + 22 -57.5 ... -56
+ - 26 ... + 26 -61 ... -60.5
or
-56 ... -55
- - 30 ... + 30 -62 ... -61
or
-55 ... -50
Clean the electrode according to the
sensor operating manual
Error Error
< - 30 or
> 30
... -62 or
... -50
Eliminate the error according to chapter
15 W
HAT TO DO IF... (page 173)
1 Connect a pH electrode to the meter.
2 Highlight the channel of the electrode in the measured value
display.
3 If necessary, select the pH display with <MODE>.
4 Keep the buffer solutions ready. Adjust the temperature of the
buffer solutions, or measure the current temperature, if you
measure without a temperature sensor.
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