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Use only fresh buffer solutions! Dispose of any used buffer solution.
Observe that transmitter, electrode and buffer solution has the same
temperature - preferably app. 77° F / 25° C.
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:
Position Function
Measurement.
The switch ring should always be in this position during normal
M
service (measuring). This is indicated by the LED flashing app. every
5 seconds.
4
Buffer adjustment in buffer with pH value 4.
7
Buffer adjustment in buffer with pH value 7.
10
Buffer adjustment in buffer with pH value 10.
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 liquid 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 span 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 or for another buffer
adjustment at another pH value.
pHix® Compact determines automatically if zero point or span 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, 4-7 pH / 7-10
pH.
Buffer adjustment /Buffer adjustment using the switch ring
pHix® Compact V3. NG (next generation)
EN 4.10 Version 2103
26
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