Ph Readout Error

[Jvak]

So every day at the same time my Ph2 probe which i have in my calcium reactor gives false readings I have attached a pic of the graph showing what it does. Any guesses as to why this is happening?

 

[RussM]

What happens at that time? Lights turn on, or anything like that?

 

[Jvak]

It is around the times my light come on and off. They begin the ramp up at 10 and are completely off at 10

 

[aquamanic]

Well, there you go.

Move your probe wires to begin with, just to test. Lay them outside the tank if you have to. See if that changes anything.

 

[Jvak]

Why would my lights turning on or off have any effect on the ph in my calcium reactor?

 

[Japsican]

Why would my lights turning on or off have any effect on the ph in my calcium reactor?

Some kind of EMC/EMI interference from the lights booting up?

 

[aquamanic]

That would be it....

Doesn't happen often but it does happen. It's worth a test anyway. Maybe nothing.

 

[Jvak]

So that that i know the possible problem, how do i go about testing for it and then correcting it?

 

[RussM]

First thing I would do is try to confirm that the lights are the trigger by turning them on manually at some other time than normally programmed.

 

[aquamanic]

how do i go about testing for it and then correcting it?

See post #4

If that really is it, then rerouting the probe wires might be sufficient. Otherwise, you can install a choke on the probe cable and/or move the light wires.

 

[lowscooby76]

i had the samething happen to me it was the cable to my tunze powerhead when it would ramp up and down my ph reading would do the same.i had to move the ph probe cable and move the tunze Power Supply.it work great now.