Results 1 to 4 of 4

Thread: PH rapid climb

  1. #1
    Regular Vistor
    Join Date
    May 2018
    Location
    UK
    Posts
    40

    PH rapid climb

    Hello i seem to have a problem. I have had this probe for about 4 month and suddenly this is what happens:

    Untitled.png

    and still climbing up. I now disregard the PH as i know its wrong compared to Chemical test is around 7.8-8

    Any suggestions?

  2. #2
    Frequent Contributor zombie's Avatar
    Join Date
    Dec 2013
    Location
    Denver, CO
    Posts
    13,176
    Recalibrate and loos for sources of noise near it including checking the tank for stray voltage.

    You might be an engineer if...You have no life and can prove it mathematically.

  3. #3
    Regular Vistor
    Join Date
    May 2018
    Location
    UK
    Posts
    40
    Not sure how to check for stray voltage but i did move probe to main tank from sump with 3 hours no rapid changes as on 0.10th. I did use ph 4 and 7 to calibrate probe. Have 7 and 10 coming this week by post which i think should work with rince in tap water in between calibration fluids or RO water?

    PH stays high but stable so hope re calibration will sort problem.

  4. #4
    Frequent Contributor zombie's Avatar
    Join Date
    Dec 2013
    Location
    Denver, CO
    Posts
    13,176
    Quote Originally Posted by sertan View Post
    Not sure how to check for stray voltage but i did move probe to main tank from sump with 3 hours no rapid changes as on 0.10th. I did use ph 4 and 7 to calibrate probe. Have 7 and 10 coming this week by post which i think should work with rince in tap water in between calibration fluids or RO water?

    PH stays high but stable so hope re calibration will sort problem.
    Stray voltage can be checked by using a voltmeter to check for AC voltage between the tank and the ground on a nearby outlet. If the value is more than 5V, it usually indicates the insulation is starting to fail on one of your devices, which will impact probe readings and if not fixed soon may leach copper into the tank when the insulation fails completely.

    I don't bother rinsing between solutions. I just give it a good shake and it's fine. If you want to rinse between RO is better than tap but doesn't really matter as there is a lot of buffer preventing the calibration solution from changing.



    You might be an engineer if...You have no life and can prove it mathematically.

Similar Threads

  1. Help! Ca continues to climb
    By MtnRunner in forum DŌS & DDR – Dosing and Fluid Metering System
    Replies: 7
    Last Post: 11-23-2019, 14:14
  2. Help! ORP continuing to climb
    By Doc in forum AquaBus Modules, Probes, and Breakout Boxes
    Replies: 3
    Last Post: 08-23-2018, 03:37
  3. Question: VDM and Rapid LEDs
    By Monty06 in forum Apex Programming for Lighting
    Replies: 3
    Last Post: 03-08-2014, 09:12
  4. Help! Rapid LED set up
    By benb in forum Apex Programming for Lighting
    Replies: 11
    Last Post: 08-14-2013, 18:32
  5. Help! Rapid Onyx
    By plasma327 in forum Apex Programming for Lighting
    Replies: 15
    Last Post: 07-02-2013, 16:42

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •