waste said:When I'm doing the ch or alk test, I'll turn the SpeedStir off and back on when I'm getting close to the endpoint so I don't miss it.
I do this same thing.
waste said:When I'm doing the ch or alk test, I'll turn the SpeedStir off and back on when I'm getting close to the endpoint so I don't miss it.
rcy said:Mine arrived in the mail yesterday (along with a new Borate drop based test - check in Chem 201 if you need a Borate test kit).
At first it didn't work - I tested the batteries and they were all 1.6 volts - more than enough. After removing and re-inserting the batteries several times, it suddenly started working. I hope there's not a loose connection or something.
One thing that I DON'T like, is that it auto stops after one minute. My calcium test takes much longer than that, by the time I add the 20 drops at the start, it's been over a minute...
Other than that, it made testing way easier.
waste said:When I'm doing the ch or alk test, I'll turn the SpeedStir off and back on when I'm getting close to the endpoint so I don't miss it.
My understanding is you add drops until the last one does nothing, then subtract that drop from you total. So using that rule, you would count the drop where it became very clear/white and you would put one more in to make sure it does not change (assuming that drop causes not change) with that drop being not counted. I do believe the speedstirs light improves the ability to see changes.codybear said:I just recently bought a speedstir when I was replacing my old taylor kit. Now, I only wish I had known about it sooner. I really like the light and the way it seems to make the colors fluorescent. But ...
When I'm testing for FC and CC, I get to a point that the pink is gone, but because of the light, I can see the sample is just not quite clear/white. One more drop and it becomes very clear/white. So if I was doing this without the light, I would have stopped one drop sooner. But with the light magnifying the color, I end up with one additional drop. So, which reading would be considered correct? Obviously, if I was doing this by hand, I would have not added the last drop.
Only because I heard it from an expert! I wonder who that could be...Daveduraleigh said:Linen's response cannot be improved upon! :lol: :lol:
codybear said:I wanted to try the FC/CC test again before I better try to explain my question. In both tests I'm using the speedstir, one with the light and one without the light.
1. Without light: 2 drops needed to remove pink, third drop does nothing
2. With light: 2 drops needed to remove pink, third drop changes from clear/white to bright clear/white, fourth drop does nothing.
So in case one, I would have said 2 drops were required and in case two, I would have said 3 drops were required. So really the question is, did Taylor design these tests for the typical user that is not using a lighted speedstir or are these tests designed for the lighted speedstir, which can detect minute changes?