Hanna Instruments HI 84432 - Manual (Page 24)

24
PURGE
Purging should be performed:
• if you notice there is no titrant in the tip;
• whenever the tube of the peristaltic pump is replaced;
• whenever the titrant is changed or a new bottle is used;
• before starting a pump calibration;
• before starting a lot of titrations.
In order to start purging, press the Purge key from the titrator main screen. The purging stops
automatically after 5 minutes.
To access the Purge key follow the next steps.
• From the instrument main screen (pH meter screen) press “Titrator” function key.
The instrument will display the next screen if any of the following conditions exist:
- the meter hasn’t been calibrated in 8.20 pH buffer
- the pH calibration has expired
- a pump calibration hasn’t been performed or more than 3 days have passed since the last
pump calibration.
• Press CAL to access the titration calibration menu where electrode and pump calibration may
be accessed.
• Press HELP to view the contextual help.
• Press Continue or ESC to skip the message and enter titrator main screen.