KH Director

DungSl1nger

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So I have finally gotten my KH Director set up and let it run for a bit. At present it is reading a high of 12.9 but it has bounced from the 12-13 range down to zero and back up.

1823E734-6A3F-4BD6-9B7F-FDBAFBE867A8.png


I crossed referenced this with my Hanna Checker. Over the course of my tanks life it has been consistent. The jump from the 8 to 9 range is due to 1 1/2 teaspoon per gallon of kalkwasser in the ato. I do weekly water changes of 9 gallons


5E22E026-BF58-4F14-AD5E-D54925F63B41.jpeg


my question is being new to this what do I start with to get to a closer number between the testing systems. J understand there is going to be a discrepancy but I don’t thing it should be this far off. Thank you!
 

paul01609

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Mine was miles out until i weighed the fluid,or use a syringe for the ml.
there calculator was totally wrong including how much fluid the water filter held.
then when it’s all set just leave it for a couple of days to do it’s testing
 
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DungSl1nger

DungSl1nger

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Mine was miles out until i weighed the fluid,or use a syringe for the ml.
there calculator was totally wrong including how much fluid the water filter held.
then when it’s all set just leave it for a couple of days to do it’s testing
What equipment do you use to weigh the fluid? It might be my only choice. I triple checked lengths of the tubing. I also think I will need to do the me for the Ion Director when it makes it’s entrance to the market.
 

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Some measuring cups are more accurate than others, but as @paul01609 mentioned, a digital scale will be a lot more accurate for measuring liquids. This is what I use for calibrating my pump heads:
1605723513039.png
Also, check the placement of your water sample tube in the sump. If you have it in an area where microbubbles are present, it will skew the KHD's results. The larger the bubble, the more skewed the result will be.
 
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DungSl1nger

DungSl1nger

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Some measuring cups are more accurate than others, but as @paul01609 mentioned, a digital scale will be a lot more accurate for measuring liquids. This is what I use for calibrating my pump heads:
1605723513039.png
Also, check the placement of your water sample tube in the sump. If you have it in an area where microbubbles are present, it will skew the KHD's results. The larger the bubble, the more skewed the result will be.
Vinny thank you. I have it in the return on the back (opposite side) of the return pump inlet about an inch from the bottom. I wanted to avoid the skimmer chamber because of the possibility of micro bubbles. I think I will give the scale a try. Do I just calibrate the pump then weigh the result? What other formula is used for conversion?
 

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Vinny thank you. I have it in the return on the back (opposite side) of the return pump inlet about an inch from the bottom. I wanted to avoid the skimmer chamber because of the possibility of micro bubbles. I think I will give the scale a try. Do I just calibrate the pump then weigh the result? What other formula is used for conversion?
For piece of mind, if you wanted to you can also get a calibration weight like this one. It will verify the accuracy of your scale prior to each use.

When it comes to calibrating, what I first do is place the empty cup on the scale. I'm using a Doser 2.1 so I just use a specimen cup to collect the water. Press the TARE button on the scale, then begin the calibration. The tare button allows the scale to factor-in the weight of the cup which saves you from having to subtract the weight at the end.

The conversion is 1 gram = 1 ml
Easy enough. :)
1605724131462.png
 
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DungSl1nger

DungSl1nger

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Mine was the same I couldn’t figure out why it was 2-3 dkh higher than my hanna
Scale and weights are ordered. Yea I figured I would let it play out for a bit before chasing numbers. It seems people have had some issue with the setup. I don’t know if it’s the way the instructions are written or how my mind is wired. I went through many videos over the course of a week just so I wouldn’t make mistakes. It’s awesome you figured it out though.
 
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DungSl1nger

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For piece of mind, if you wanted to you can also get a calibration weight like this one. It will verify the accuracy of your scale prior to each use.

When it comes to calibrating, what I first do is place the empty cup on the scale. I'm using a Doser 2.1 so I just use a specimen cup to collect the water. Press the TARE button on the scale, then begin the calibration. The tare button allows the scale to factor-in the weight of the cup which saves you from having to subtract the weight at the end.

The conversion is 1 gram = 1 ml
Easy enough. :)
1605724131462.png
Awesome, I just got the scale and calibration weights. Thank you for the help. I’ll update this on probably Monday after a recalibration. I’ll check on the micro bubble possibilities as well.
 

Dr. Jim

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Just curious as to why some people prefer to weigh the water rather than measure it with laboratory graduated cylinders. Seems like the "weighing" method is indirect and allows for more error (scale error; calibration error) while simply putting it in a graduated cylinder gives you a direct measurement. (I'm sure either method is fine for our purposes however.)
 

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