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User‘s manual for CP-511 pH meter v1.10
10.2. Measurements with manual temperature compensation
Disconnecting the temperature probe switches the meter to the manual
temperature compensation mode (the symbol next to the temperature
reading disappears).
Measurement with manual temperature compensation is similar to
measurement with ATC, the difference is that for manual compensation the
meter takes into consideration the value of the temperature introduced by the
user instead of the temperature measured with the temperature probe.
Manual compensation may be applied during work in stable conditions e.g.
during pH measurements in the laboratory, especially with use of a
thermostat, or when the temperature probe is broken.
During measurement with manual temperature compensation:
- switch the meter on using the button;
- insert the pH electrode to the vessel with the measured solution, if the
electrode is not calibrated or has been already used for some time it is
advisable to calibrate it (chapter 8). During measurements in a vessel do
not touch the bottom and the walls with the electrode. It is advisable to use
an electrode stand;
- measure a temperature of measured solutions using laboratory
thermometer;
- enter the temperature value of measured solution for manual
compensation according with the , buttons;
- wait till the value stabilises and read the result (Pic. 10)
Pic. 10
Note: pressing the , buttons simultaneously will set the
compensation temperature to 20
0
C.
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