Hey guys. I got a new KH Director and have spent the last 2 days trying to get it to work. My PH probe calibration seems on the dot and I've done my dosing pump calibration 4 times now (all within 2%). Unfortunately, it's reading my tank at 14.5dkh and the reference solution at 10.5dkh.
My question is about the water sample tube volume that needs to be entered into GHL CC. The tube from the doser to my sump is 103cm long and I'm using the included inline filter (on the end of the sample line hanging in the sump). When I enter 103cm+16cm (doser to director tube)+12cm (the value given in the manual for the peristaltic tube) into the GHL CC calculator I get a value of 16ml, 23ml total with the included filter.
For a test, I removed the sample line at the director and primed the line until there was no air bubbles and water came out of the end. Then I pulled the filter from the sump and manually ran the pump, emptying into a graduated cylinder until the line was completely empty. I did it 3 times and got 22ml total volume each time.
When I measured the volume of just the sample tube from the sump to the doser, I got a volume of 16ml. I would think that the filter plus the peristaltic line would push the total past 22ml since the filter is supposed to be 7ml by itself.
What number should I be using? Does the software make certain assumptions and I'm throwing it off by trying to calculate things manually? Is the sample volume that important that 5-10% difference would make a 40-50% difference in readings?
AHHHH! Going crazy!
My question is about the water sample tube volume that needs to be entered into GHL CC. The tube from the doser to my sump is 103cm long and I'm using the included inline filter (on the end of the sample line hanging in the sump). When I enter 103cm+16cm (doser to director tube)+12cm (the value given in the manual for the peristaltic tube) into the GHL CC calculator I get a value of 16ml, 23ml total with the included filter.
For a test, I removed the sample line at the director and primed the line until there was no air bubbles and water came out of the end. Then I pulled the filter from the sump and manually ran the pump, emptying into a graduated cylinder until the line was completely empty. I did it 3 times and got 22ml total volume each time.
When I measured the volume of just the sample tube from the sump to the doser, I got a volume of 16ml. I would think that the filter plus the peristaltic line would push the total past 22ml since the filter is supposed to be 7ml by itself.
What number should I be using? Does the software make certain assumptions and I'm throwing it off by trying to calculate things manually? Is the sample volume that important that 5-10% difference would make a 40-50% difference in readings?
AHHHH! Going crazy!