Redox Null plug ???
- Thread starter TandN
- Start date
ReefEnabler
Premium Member
you only put in the null plug for the 1st part of calibration. after its done calibrating to neutral it then it tells you to put the probe in and into the 220mv solution, press OK and wait again.
Sorry to hijack you thread tanya72806....
I understand the null plug but what do I do in this case:
Calibrated as instructed
Checked the calibration by replugging in the null plug and I get a reading of 2 mV??? How do I get it to read 0? I calibrated 2x with the same results.
For the heck of it.. I placed the probe into my tank after the 2nd calibration and the reading started out at 217mV and within 5 minutes it decreased to 195mV and is steadily dropping?? I also plugged in my ozone to see if it would start increasing it... nope.
I am not the sharpest tool in the shed when it comes to stuff like this but I am confident that I did every step as instructed (even though I would work much better with a book labeled "Profilux Plus II Ex for Dummies").
I set my nominal value at 370mV whereas I have been reading that between 350-390mV is good. I figured that mid point would be safe. Did I misinterpret what nominal is? Is that why I may be getting this wacky reading? I say wacky because I believe if my system was at 195 and steadily decreasing, my corals wouldn't look as vibrant as they do.
Any help is greatly appreciated!
PS - I did look at the wiki answers for Profilux and couldn't find this topic so I posted here.
I understand the null plug but what do I do in this case:
Calibrated as instructed
Checked the calibration by replugging in the null plug and I get a reading of 2 mV??? How do I get it to read 0? I calibrated 2x with the same results.
For the heck of it.. I placed the probe into my tank after the 2nd calibration and the reading started out at 217mV and within 5 minutes it decreased to 195mV and is steadily dropping?? I also plugged in my ozone to see if it would start increasing it... nope.
I am not the sharpest tool in the shed when it comes to stuff like this but I am confident that I did every step as instructed (even though I would work much better with a book labeled "Profilux Plus II Ex for Dummies").
I set my nominal value at 370mV whereas I have been reading that between 350-390mV is good. I figured that mid point would be safe. Did I misinterpret what nominal is? Is that why I may be getting this wacky reading? I say wacky because I believe if my system was at 195 and steadily decreasing, my corals wouldn't look as vibrant as they do.
Any help is greatly appreciated!
PS - I did look at the wiki answers for Profilux and couldn't find this topic so I posted here.
AQD_ottawa
New member
Hi
Dont worry about the null plug reading, i will post here in a seperate post the calibration instructions for you.
As for dropping reading with a Redox probe when new - This is 100% normal, what is hapening is the probe is bedding in, it can take up to one week for a redox probe to stabilise, after that i will read fine. Just leave it in the system and allow it to settle do not keep playing with it, otherwise it will never settle.
Dont worry about the null plug reading, i will post here in a seperate post the calibration instructions for you.
As for dropping reading with a Redox probe when new - This is 100% normal, what is hapening is the probe is bedding in, it can take up to one week for a redox probe to stabilise, after that i will read fine. Just leave it in the system and allow it to settle do not keep playing with it, otherwise it will never settle.
AQD_ottawa
New member
Calibration of Redox.
First of all you will be required to insert the null plug (supplied with our redox cards). Thereafter pressing
RETURN will start the measurement process, during which two numbers will be seen in the lower line of the
display. The left-hand number gives the maximum time remaining in seconds. If this time expires without the
measurement stabilising sufficiently then the electrode will be deemed defective and the calibration aborted.
The right-hand number shows the measurement in an internal code. ProfiLux Plus II recognises
automatically when this value has stabilised and then terminates the measurement process. After this
measurement you will next be required to immerse the electrode in the calibration solution (with the
previously set standard value). Obviously the null plug should now be removed and the electrode
connected! Again the measurement process is started by RETURN.
When this measurement too is completed, you will be asked whether the data are to be stored. If no errors
have occurred, confirm with Yes.
Finally, it is advisable to check the calibration. First plug in the null plug â€"œ is the reading around 0mV? (anything up to 5mV is fine)Then connect the electrode and immerse it in the calibration solution. Is a figure approximating to the upper
calibration value now displayed?
First of all you will be required to insert the null plug (supplied with our redox cards). Thereafter pressing
RETURN will start the measurement process, during which two numbers will be seen in the lower line of the
display. The left-hand number gives the maximum time remaining in seconds. If this time expires without the
measurement stabilising sufficiently then the electrode will be deemed defective and the calibration aborted.
The right-hand number shows the measurement in an internal code. ProfiLux Plus II recognises
automatically when this value has stabilised and then terminates the measurement process. After this
measurement you will next be required to immerse the electrode in the calibration solution (with the
previously set standard value). Obviously the null plug should now be removed and the electrode
connected! Again the measurement process is started by RETURN.
When this measurement too is completed, you will be asked whether the data are to be stored. If no errors
have occurred, confirm with Yes.
Finally, it is advisable to check the calibration. First plug in the null plug â€"œ is the reading around 0mV? (anything up to 5mV is fine)Then connect the electrode and immerse it in the calibration solution. Is a figure approximating to the upper
calibration value now displayed?
ReefEnabler
Premium Member
how much affect does temperature have on the calibration?
when I did mind, I had the bottle set in a shelf in my sump water (79F) for a few hours so the calibration fluid was the same temperature as my water.
when I did mind, I had the bottle set in a shelf in my sump water (79F) for a few hours so the calibration fluid was the same temperature as my water.
AQD_ottawa
New member
Not a great deal due to auto temp compensation
AQD_ottawa
New member
If running ozone then no higher than 430mV absolute max.
