odd happening on kalc doser

[psteeleb]

Here is one hat has me baffled

The last 4 days at 3:30am my pH spikes upward, then decreases back to hte normal for the cycle over about an hour and a half - looks like a classic Kalc over dose to me

Evidence:
I have a Kalkwasser reactor set to dose for 15 seconds every 30 minutes for a total volume of just under one gallon in 24 hours

I usually evaporate 2-3 gallons a day so a gallon should not be a problem. but the sum level has increased steadily over the past couple days

The spikes have been decreasing from the first event and so has the over all pH, so I suspect my kalkwasser is less saturated and needs to be replenished but I'm not going to unless I figure this one out

My conclusion:
I suspect that for some reason the 3:30 dose must be running longer then 15 seconds: due to time of spike and the sump volume increase

Has anyone run across an event where an oscillate command is not consistent, or should I say that gives you a consistent variable?

Current Kalc program:
Fallback OFF
Set OFF
OSC 000:00/000:15/029:45 Then ON
If pH > 08.15 Then OFF

 

[swearint]

First, to confirm the OSC timing, check the Outlet XML report. Or, if running 4.04 firmware, graph the outlet. This will show you when the outlet is turning ON/OFF. Second, what outlet do you have the doser on? I am going to assume the doser is a low wattage device, i.e. around 5W. It is possible that the pump is not properly shutting off if you have it on one of the triac outlets (outlets other than 4 and 8). Oh, and the SET OFF command is not necessary since the OSC generates both ON and OFF state.

Todd

 

[psteeleb]

First, to confirm the OSC timing, check the Outlet XML report. Or, if running 4.04 firmware, graph the outlet. This will show you when the outlet is turning ON/OFF. Second, what outlet do you have the doser on? I am going to assume the doser is a low wattage device, i.e. around 5W. It is possible that the pump is not properly shutting off if you have it on one of the triac outlets (outlets other than 4 and 8). Oh, and the SET OFF command is not necessary since the OSC generates both ON and OFF state.

Todd

I checked the graph but with it updating every 10minutes its inconclusive. It does shut down on when pH is over 8.15

I have not checked the XML report - will do that now
also it's in plug number 7 and it is a very low wattage pump so yuo may be on to something

thanks

 

[RussM]

I have not checked the XML report - will do that now

Reeftronics has an online tool that can make that task much easier... it sorts the raw data (which is in time sequence) and groups it by outlet.

If your controller is accessible from the Internet
If your controller is NOT accessible from the Internet

And having the dosing pump on a TRIAC outlet is iffy... definable the best bet is to use EB8 outlet #4 or #8 unless you are 100% positive that the pump operates reliably on 1-3 or 5-7.

 

[psteeleb]

the XML report shows it on and off in 15 seconds as programmed but sounds like that for this smal amperage pump the off reading may not be reliable so I'll change it to #4 or #8

thanks

including graph so you can see the spikes

the blue curves are then normal Ph swing for lights on/off

the redish lines are the Kalc reactor on/off evrey 30 minutes for 15 seconds except where the ph is over 8.15