I purchased a second hand kH keeper plus and it seems to be working except that all the tests come back at 15dkH and say "no reagent".
I've seen this seems to be an error code, so I'm trying to troubleshoot.
- I've calibrated at pH4 and pH7 and done an accuracy test which seems fine
- I've mixed a second batch of reagent (100ml reagent, 900ml RODI) and tested using the second batch with the same result. The reagent "expired" in Dec 2023 but it's HCL and that doesn't really make sense. For the second reagent mix, I used an unopened (but Dec 23) bottle.
What I'll try next:
- accuracy test of the other pumps (reagent and aquarium pump)
- I wonder if the pH probe needs to be replaced. I'm not sure how old it is or how it was taken care of, so I might just bite the bullet and pick up a new one
Anything else I'm missing?
I've seen this seems to be an error code, so I'm trying to troubleshoot.
- I've calibrated at pH4 and pH7 and done an accuracy test which seems fine
- I've mixed a second batch of reagent (100ml reagent, 900ml RODI) and tested using the second batch with the same result. The reagent "expired" in Dec 2023 but it's HCL and that doesn't really make sense. For the second reagent mix, I used an unopened (but Dec 23) bottle.
What I'll try next:
- accuracy test of the other pumps (reagent and aquarium pump)
- I wonder if the pH probe needs to be replaced. I'm not sure how old it is or how it was taken care of, so I might just bite the bullet and pick up a new one
Anything else I'm missing?