"Nikki Casali" wrote in message
...
How often should continuous pH probes be cleaned and with which
solutions? How long do you leave the probe in the cleaning solution?
Should you place the probe in a storage solution after?

How about refillable probes and how often do they need refilling?

How do you calibrate yours?

Nikki
PH 4.0 calibration solution is acidic so I simply leave my Hanna meter
sitting in that solution for an hour or so after I calibrate. My first meter
stopped calibrating and the cause was a dirty probe likely from a green
water outbreak I was having at the time. Rinsing in tap water did not clean
the probe sufficient enough. When I talked to a tech guy at Hanna he
recommended using acid or leaving it in the solution.

Rick