"Jim K" wrote in message
om...
I have the Milwaukee SMS122 pH controller and found out the following from
the company:

1. The 4.01 isn't necessary since the monitor is used mostly for aquariums
and a pH that low is usually not found. In fact, they don't include one
with their monitor.

2. It is only necessary to dip the tip of the probe into about 3/4 inch of
calibration solution.

3. De-ionized, RO or bottled drinking water can be used to rinse and store
the probe.




from the instruction manual of my Hana Instrument which I believe also makes
the Checker model. Note the caps are theirs DO NOT USE DISTILLED OR
DEONIZED WATER FOR STORAGE PURPOSES.

Rick