anyone have orp calibration solution?
- Thread starter bawla47
- Start date
Rogger Castells
New member
Jaymie, there is actually no such thing but some companies produce certain liquid use as reference, they are not easy to find around, in fact most meters don't even have a way to calibrate, this is mostly due because contrary to ph probes, ORP probes are made out of noble metals such as gold, all you need to do is clean it well, I usually deep it in vinegar and clean it with a baby toothbrush, If you need to make your own cheap reference solution you can try this method that I learn from the web.
As an alternative to reference liquids use of household bleach and water. For a quick check whether your ORP measurement system is working properly, simply take a reading of your tap water (this will typically be a value well below 200 mV) and then take a reading of the same tap water adding an equal volume of bleach. In both tests you will need to allow the electrode to stabilize at a reading which may take up to 30 minutes. When the bleaches added you should get a much higher reading (up to 800 mV is possible through lower values, 300 to 60 0mV, are typical).
If the readings remain close to the readings for the tap water only, there is some problem with the ORP measurement system (i.e. the electrode sensing metal is dirty/coated or reference junction is clogged). If your test of the bleach and water mixture gives the higher readings, the ORP measurement system is working.
Hope this helps
As an alternative to reference liquids use of household bleach and water. For a quick check whether your ORP measurement system is working properly, simply take a reading of your tap water (this will typically be a value well below 200 mV) and then take a reading of the same tap water adding an equal volume of bleach. In both tests you will need to allow the electrode to stabilize at a reading which may take up to 30 minutes. When the bleaches added you should get a much higher reading (up to 800 mV is possible through lower values, 300 to 60 0mV, are typical).
If the readings remain close to the readings for the tap water only, there is some problem with the ORP measurement system (i.e. the electrode sensing metal is dirty/coated or reference junction is clogged). If your test of the bleach and water mixture gives the higher readings, the ORP measurement system is working.
Hope this helps
