On-line citywater alkalinity measurement
On-line citywater alkalinity measurement
(OP)
Hello All:
Has anyone here had any successful dealings with Hach's APA 6000 meters? The problem we're having is that the automated readings are not even close to the manual testing. Perhaps a specific backround interference is affecting one test but not the other (methyl purple and N50 as standard)?
Thanks, any ideas would be great,
Drew
Has anyone here had any successful dealings with Hach's APA 6000 meters? The problem we're having is that the automated readings are not even close to the manual testing. Perhaps a specific backround interference is affecting one test but not the other (methyl purple and N50 as standard)?
Thanks, any ideas would be great,
Drew





RE: On-line citywater alkalinity measurement
RE: On-line citywater alkalinity measurement
That said, I've run-across problems with the same brand of controller and apparently often-times the widely accepted calibration "standard" is not a standard at all--simply widely accepted. Just thought I'd check on here first, no use reinventing the wheel if anyone had direct experience making these controllers work.
RE: On-line citywater alkalinity measurement
There are lots of online instruments available, but usually there is so much maintenance required that the equipment is usually ignored. Ultimately the equipment goes into disrepair.
Why are you concerned with the alkalinity and the precision? Are you doing any water treatment? I vaguely recall a standard beverage water treatment process using lime softening, which would of course control the alkalinity.
RE: On-line citywater alkalinity measurement
All maintenance on the meter is current and has been performed to specs. My current guess is that an unknown interference is present in too high quantities that is fouling-up one of the tests. Just a guess at this point though; thought I'd check on here first before burning a lot of time figuring out exactly what is going-on, on the off-chance that someone had already fought this battle.