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- Nov 25, 2014
- Reaction score
- Chicago, IL - West Suburbs
If you have not done each and every one of these mods I would suggest doing so. The quality of the ph probe doesn't matter that much as it uses the behavioristic curve of the probe. But I think the rest of the improvements really help to lock in the values. Anyway, you don't have much to lose by trying.So, unfortunately my positive feeling towards my unit have dwindled over the last ~2 months. At some point in November, my unit started throwing erroneous low readings (in the 2-4 dkh range). After recalibrating my probe, I worked with support to diagnose (involved swapping in and calibrating two spare probes I had somewhere else on my system) and we decided that the pH probe which came with the unit (8 months old) had gone bad and needed to be replaced (at my expense). I purchased a new probe from Coralvue (note - not the same design as the original probe that came with the unit) and things were going okay for about a month, although I was still struggling to get things dialed in with consistent accurate readings, but then that probe started reading poorly. Again, recalibrated that probe and then we determined that this probe was also bad. Coralvue sent out a replacement for that probe, so now that one was installed/calibrated. I kindly requested that Coralvue send me out some calibration standards as well, since I had blown through what should have been several years worth of calibration packets troubleshooting these issues, but they didn't have any in stock, so I guess I'm out the cost of that. I also blew through an entire reagent pack just trying to get these probes dialed in and reading accurately and consistently, which you all know isn't cheap. Now, with this new probe installed for about a month, I am getting okay readings, but still not consistent, with fairly regular readings that are clearly inaccurate (jumping up something like 0.5 dkh for a single reading, and then falling back inline with overall trend). I have a hunch that the replacement probe offered by Coralvue is not as high quality as the probe which originally came with the unit (although, failing after 8 months, maybe that probe wasn't as high quality as I thought it was either).
At this point, I have had the automatic dosing function turned off for 2-3 months and I don't think I can trust this unit enough to turn it back on, so it will be a monitor only for me. My original goal with this unit was to keep alkalinity rock solid within 0.1 dkh throughout the day, but it is just not accurate or reliable enough to do this. Even when my unit was running at its peak during the first 8 months, I still couldn't get my alkalinity any more stable intra-day than without using it to dose. So, I will simply use it to alert me if my alkalinity is way out of whack - but even then, I will need to test with a kit before taking any action.
Maybe - but I’m not really looking for a new project and shouldn’t have to spend a month worth of tweaks to get a $600 piece of equipment to do what it was supposed to do out of the box.If you have not done each and every one of these mods I would suggest doing so. The quality of the ph probe doesn't matter that much as it uses the behavioristic curve of the probe. But I think the rest of the improvements really help to lock in the values. Anyway, you don't have much to lose by trying.
1) Lab grade pH probe
2) Reaction Chamber v2
a) large version magnetic stirrer 5x10mm
b) v2 motor
c) adjust motor to 9.8v
3) KS roller tweak (remove 3 of 6 rollers - larger, more consistent droplets)
4) Upgrade to v9.003
how would we know if we are only at 6 or whatever volts. I do not have something to measure the volts of mine so I guess there is noway for me to check?I get that. I think Coral Vue has a lot of stock of older hardware. For the reaction chamber and v2 motor they should be able to replace that. The rest of the methods I got from reading the facebook group.
You can tell if you have the V2 motor by the size. It's much longer. There should also be a green dot on where the float sensor connects to the reaction chamber. There are also different versions of the float. If the bottom has an offset piece at the end than you have the right one.
The motor one I'd have to grab the picture, but basically you need to put a voltmeter where the KS motor connects and turn a screw in the middle of the MB to make sure it's 9V but you could go all the way to 9.8V, the only consequence is slightly noisier. If you replaced the reaction chamber yourself, you might still be at 6V.
Some people have gotten v2 motors with the tiny stirrer. The right one should be 5x10mm. The last tweak is removing 3 of the roller heads from the KS motor. The rollers come out really easily and would be easy to put back in. You can see how to open it up in the how to replace KS motor. I recommend some painters tape over the holes for the nuts and they won't come out. The version 9.003 has added logic to support doing that. It should lead to larger more consistent sized drops.
The list is all the things that I've done to modify mine based on suggestions from DVC on here and in the facebook page. As far as I'm concerned at this point I would recommend that CoralVue stop shipping any units without at least ensuring the v2 motor, reaction chamber, 9v setting, and the larger stirrer. There was no reason for mine to ship with every single old part when I ordered it two months ago. They are doing themselves, their customers, and DVC a bad name and causing your frustration.
What I would recommend is at least trying to get to this point to get what you've paid for, if it still doesn't solve at least you tried. There's nothing else in the market without spending $1,000 to gain this functionality. For the past 4 days, my tests are 1-3ppm apart and typically 0-1ppm. 1ppm = .01 dKH so it really doesn't get much better...
One more recommendation if you haven't tried yet is to doing the static test. If after all the above and try that, that could eliminate a lot of doubt or confirm your suspicions.
Gotta be on The same networkI picked up a used guardian from a club member and am trying to get it up and running. I am unable to even connect it to my laptop. The unit finds the dhcp fine with both green and yellow lights. I type in the ip address in my laptop and the browser just times out and will not connect. Any advise would be helpful