Xylem PHIX COMPACT pH and Redox Transmitter - Manual (Page 18)

18
Buffer Adjustment
GB pHix Compact Manual 100318
In service (measure-
ment).
1 flash every 5.
second.
Buffer adjustment in
pH 4 buffer.
Buffer adjustment in
pH 7 buffer.
Buffer adjustment in
pH 10 buffer.
Example of buffer adjustment in pH 4 and
7
1: With the switch ring in position 'M', flush
the electrode tip in demineralised water.
(The LED gives 1 short flash every 5.
sec.)
2: Turn the switch ring from position 'M' to
position '7', and dip the electrode tip into
the pH 7 buffer solution.
(The LED will now begin to give 3 short
flashes every 5 sec.)
When the buffer adjustment has finished
sucessfully, the LED will start to give 2
short flashes every 5. sec.
The zero point is now set.
3: Turn the switch ring from position '7' to
position '4', and dip the electrode tip into
the pH 4 buffer solution.
(The LED will now begin to give 3 short
flashes every 5 sec.)
When the buffer adjustment has finished
sucessfully, the LED will start to give 2
short flashes every 5. sec.
The span angle is now set.