Results 1 to 10 of 10

Thread: Calibration fluid?

  1. #1
    Frequent Visitor
    Join Date
    May 2017
    Location
    uk
    Posts
    185

    Calibration fluid?

    Hi all,
    was calibrating my salinity probe and tested the 53,000 fluid it was coming out at 26 , isn’t it supposed to be 35?
    Thanks

  2. #2
    Frequent Contributor zombie's Avatar
    Join Date
    Dec 2013
    Location
    Denver, CO
    Posts
    13,176
    26 measured by what?

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

  3. #3
    Frequent Visitor
    Join Date
    May 2017
    Location
    uk
    Posts
    185
    I used the Milwaukee ma 887

  4. #4
    Frequent Visitor
    Join Date
    May 2017
    Location
    uk
    Posts
    185

  5. #5
    Frequent Contributor zombie's Avatar
    Join Date
    Dec 2013
    Location
    Denver, CO
    Posts
    13,176
    Is the ma 887 freshly calibrated?

    26 is low IME. I believe my packets measured 31 or 32 refractive index (the salinity is actually 35 they just don't have a refractive index of 35).

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

  6. #6
    Frequent Visitor
    Join Date
    May 2017
    Location
    uk
    Posts
    185
    I did 0 it with ROFE813534-ED9D-4C3E-B887-0E212216A966.jpgihave just poked this little gizmo in and it came up 22?

  7. #7
    Frequent Contributor zombie's Avatar
    Join Date
    Dec 2013
    Location
    Denver, CO
    Posts
    13,176
    Zeroing with RO doesn't work very well. You need to use 35 ppt calibration fluid (randy holmes farley has a recipe to make this with table salt and RODI).

    You second tester is closer to what I would expect since that is about 30 ppt.

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

  8. #8
    Frequent Visitor
    Join Date
    May 2017
    Location
    uk
    Posts
    185
    Yes think your right , I am going to dry the probe out again and give it another go ,
    thanks

  9. #9
    Frequent Contributor zombie's Avatar
    Join Date
    Dec 2013
    Location
    Denver, CO
    Posts
    13,176
    Quote Originally Posted by jamiequ View Post
    Yes think your right , I am going to dry the probe out again and give it another go ,
    thanks
    The drying step doesn't take much. I rinse in RODI, then pat dry with a paper towel. Takes 30 seconds and is even more effective than the 2 hours the BRS video says.

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

  10. #10
    Frequent Visitor
    Join Date
    May 2017
    Location
    uk
    Posts
    185
    Thanks , yes I have been going back over your posts , Iv learn a lot ,

Similar Threads

  1. Using non neptune calibration fluid
    By reachjohnnyliu in forum Trident Marine Aquarium Water Analyzer
    Replies: 1
    Last Post: 05-23-2022, 19:57
  2. Question: ORP Calibration fluid
    By Raptor72 in forum Misc Apex Usage & Programming
    Replies: 5
    Last Post: 04-04-2018, 08:57
  3. Question: Salinity Calibration Fluid
    By MikeJT in forum A2 Apex/ApexEL and A3 Apex Pro/Apex/Apex Jr
    Replies: 0
    Last Post: 11-07-2016, 17:13
  4. Salinity calibration fluid
    By thor2j in forum AquaBus Modules, Probes, and Breakout Boxes
    Replies: 9
    Last Post: 08-04-2016, 18:33
  5. Salinity calibration fluid
    By Sobo's Reef in forum AquaBus Modules, Probes, and Breakout Boxes
    Replies: 14
    Last Post: 02-07-2015, 15:42

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
  •