Redox 4l port and dimmable balast problem

[kwiatjk]

Hi support
I have problem with my Redox level is low est. 180-220.
I have big skimmer, using ozone and lvl no grow up
I'm was looking problem and find posts about profilux problem with another probe etc.
I was start testing, disconnect probe, port and looking how is redox level
I have Profilux 3.1N with PWC 4L port and exp. box
When I disconnect cable from port and redox grow up
I have 1 dimmable ballast connected via EVG-2F to 4L port.
Anybody know why 4L port disrupts Redox probe ?

[Vinny]

Hi,

Have you made sure that your dimmable ballast is grounded?
Do you have the same results after calibrating your Redox probe?

[kwiatjk]

Yes is grounded
Yes in calibration is 220mV when i disconnect ballast from 4L is lower