Buffer Adjustment Using The Switch Ring; Example Of Buffer Adjustment In Ph 4 And 7 - Xylem MJK pHix Compact V3 NG Manual

Buffer adjustment using the switch ring

Remember to clean the electrode as described in the previous section!
When the switch ring has been on for at least 10 minutes, it will only be possible to
buffer adjust pHix® Compact with the switch ring. The switch ring has four positions, and
must only be set to one of these positions in order to obtain correct function:
Positio Function
n
Measurement.
M The switch ring should always be in this position during normal service
(measuring). This is indicated by the LED flashing app. every 5 seconds.
4 Buffer adjustment in buffer with pH value 4.01.
7 Buffer adjustment in buffer with pH value 7.
10 Buffer adjustment in buffer with pH value 10.01.
If the switch ring is set to one of the positions 4, 7 or 10, the LED will give out three short
flashes every 5 seconds.
If pHix® Compact is being put into a buffer solution with the same value as the switch
ring is set to, pHix® Compact will automatically begin to scan for a buffer with the same
value. When the value is found, pHix® Compact will automatically set the 0-point or
slope to the correct value, and the LED will indicate this with two short flashes every 5
seconds.
pHix® Compact is now ready, either for measurement by turning the switch ring in
position M, or for another buffer adjustment at another pH value.
pHix® Compact determines automatically if zero point or slope needs to be adjusted
depending of the electrode's zero point and the preceding buffer values.
If pHix® Compact cannot find the pH value for the selected buffer solution, it will go into
alarm mode, which is indicated with continuous LED flashes every second.
Note! Only use 2 buffer solutions for the adjustment, for example, 4.01 -7.00 or 7.00 -
10.01.

Example of buffer adjustment in pH 4 and 7

1. With the switch ring in position M, flush the electrode tip in water. Carefully, wipe
of the electrode tip with a cloth. Never use materials that can scratch the
measuring lens. (The LED gives one 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 three short flashes
Buffer adjustment /Buffer adjustment using the switch ring
pHix® Compact V3. NG (next generation)
EN 4.10 Version 2202
25