Search:

Well, yes.

I think one of the problems of moving to a KH control system to measure and control KH is that these systems use a completely different methodology to measure KH than what the average...

Ticket opened...

By the way, the rise in KH shown by the Hanna checker is to be expected: as I mentioned, I increased the daily Carbonate dosing by about 15% in order to help raise the KH from the initial measurement...

I recalibrated the KHD pH probe. It took me three tries to calibrate at pH 4: I got a "calibration failed" error message on the first two tries. The calibration at pH 7 worked the first time.

I...

I put the probe in my tank water and it showed 8.08 while the pH probe connected to the Profilux 4 is showing 7.93.

I will re-calibrate the KHD probe and take another KH measurement.

If the time issue has no effect on the KH measurement, then I will bring that up in another thread...

When in the pH 4 solution, the "Current Value" shows 4.11
When in the pH 7 solution, the...

Just realized the screenshots I attached are tiny.

Here they are again, hopefully more readable!

11452114531145411455

And just to be thorough, here are screen shots of the three dosing pump settings...

114491145011451

I added 15cm to the sample tube length which changed the tube sample volume from 15ml to 16ml and took another KH measurement: still 6.6.

20mins later I took a KH measurement with the Hanna: 7.5
...

Hi Vinny,

Thanks for your reply.

Ah! no I hadn't included the length of the beige tube... is that about 12cm? I will add that and try again.

Here are the screenshots of the KHD settings. ...

Hello,

I installed the KH Director with a Doser 2.1 (Slave) two days ago, following all the directions in detail: calibrated pH probe (twice), calibrated the three pumps (sample water at speed...