I made a 53mS/cm conductivity standard using 0ppm TDS RO/DI water (182g) with Morton iodized sea salt (6.2g)
I used a scale with an accuracy of 0.1g to weigh the water and the salt. I calibrated the scale prior with a 500g weight standard.
I followed the Neptune Apex instructs. I dried out the probe until the reading with acceptable and stable, then I dipped the probe into the solution and gently stirred any air bubbles out from the probe. I allowed the reading to become adequate and stable before I hit “complete.
However, the APEX is still reading the standard as 38ppt. I know I did everything correctly, and I have successfully calibrated my conductivity probe in the past. I’m not sure why it’s not reading the calibrated solution correctly.
I will try unplugging the conductivity probe and possibly even resetting the apex.
I used a scale with an accuracy of 0.1g to weigh the water and the salt. I calibrated the scale prior with a 500g weight standard.
I followed the Neptune Apex instructs. I dried out the probe until the reading with acceptable and stable, then I dipped the probe into the solution and gently stirred any air bubbles out from the probe. I allowed the reading to become adequate and stable before I hit “complete.
However, the APEX is still reading the standard as 38ppt. I know I did everything correctly, and I have successfully calibrated my conductivity probe in the past. I’m not sure why it’s not reading the calibrated solution correctly.
I will try unplugging the conductivity probe and possibly even resetting the apex.