american marine pinpoint II Calcium Monitor

nirrad · 07/29/2008, 09:55 AM

Can anyone help me out with this thing.
I Calibrated it and it worked okay the first time.... Double checked with a salifert calcium test. My question is how long does it stay calibrated.

Also, when I went to use it a few weeks after I got it. I turned it on an then put the probe in the tank water (removed from tank). The reading jumped around from 537 to 467. That is a big jump in my opinion. So then I rinsed the probe with RO water put it in the sample water and then turned it on and I got a completely different reading... What is everyones opinion on these pinpoint monitors?

Thanks.

07/29/2008, 09:55 AM	#1
nirrad Registered Member Join Date: Feb 2005 Location: St. Louis Posts: 112	american marine pinpoint II Calcium Monitor Can anyone help me out with this thing. I Calibrated it and it worked okay the first time.... Double checked with a salifert calcium test. My question is how long does it stay calibrated. Also, when I went to use it a few weeks after I got it. I turned it on an then put the probe in the tank water (removed from tank). The reading jumped around from 537 to 467. That is a big jump in my opinion. So then I rinsed the probe with RO water put it in the sample water and then turned it on and I got a completely different reading... What is everyones opinion on these pinpoint monitors? Thanks.