Ph Calibration - wtw Avantor VWR pH 1100 L Operating Manual

pH 1100 L
Why calibrate?
When do you have to
calibrate?
Buffer sets for
calibration
ba77068d05 05/2021
Menu item
Temperature unit
Resolution pH
Resolution mV
Stability control
Reset

5.4.5 pH calibration

pH electrodes age. This changes the zero point (asymmetry) and slope
of the pH electrode. As a result, an inexact measured value is dis-
played. Calibration determines and stores the current values of the
zero point and slope of the electrode.
Thus, you should calibrate at regular intervals.
 After connecting another combination electrode
 When the calibration interval has expired
You can use the buffer sets quoted in the table for an automatic calibra-
tion. The pH values are valid for the specified temperature values. The
temperature dependence of the pH values is taken into consideration
during calibration.
Possible Explanation
setting
°C Temperature unit,
°F degrees Celsius or
degrees Fahrenheit.
All temperature values are
displayed with the
selected unit.
0.001 Resolution of the pH dis-
0.01 play:
0.1
0.1 Resolution of the mV dis-
1 play:
On / Off Switches on or off the
automatic stability control
during measurement (see
section 5.3.3)
- Resets all sensor settings
to the delivery condition
(see section 5.8.1).
Operation
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