Hi there. I am trying to make a chemical pump unit for my swimming pool. I bought both the grove orp and ph probes. Is there an easier way to calibrate the orp? I do not have any of the materials or equipment to make up the solution. The accuracy of the chlorine is not real important. Any ideas or tips would be appreciated.
I have found a couple of orp calibration solutions on amazon. They have different mv values (225mv 256 mv) ect. Is it possible to purchase and use one of these solutions to calibrate. If I get a 225mv. solution is that what the reading should be when use it?