You are right! The stands we used were not the ones that came with the probe. They had a heavy base and did not topple over. I have not worked at the college for a long time and I do not remember where they came from. Possible from HACH
I do not work at school anymore. Before I left we were about to change the standards for Conductivity, but so much was going on and I left that job for the new person (so I don't actually know how that works). For the second question I cannot answer as an environmental scientist. I cannot say if those standards are too restrictive or two broad (maybe someone here can answer that part). What I can say in my laboratory Those standards would be good ones because they cover most of the results you would be getting. Then if you get a result over 500 you can dilute the sample to get a result between 147 and 500, then multiply your result by the dilution factor. Also in my world, I would also run some quality control samples, for example one that gives a lower result like 200 and another control sample that gives a result of 400 to make sure your standard curve is accurate. Hope this helps a little.
At the time of the video I think it was 1428 and 12900 or something like that. The meter can use any standard and so the new instructor changed to different standards much closer to the samples they normally test. I do not remember the new standards. I stopped working at school in spring after making more videos. The students could not do labs because of covid. I had to leave the new set up for the new lab aide
Suppose if we have done calibration for 12.9mS/cm, if i hadn't get the exact value after the meter stabilizing what should i do?
where did you buy the stand to hold the probe?
You are right! The stands we used were not the ones that came with the probe. They had a heavy base and did not topple over. I have not worked at the college for a long time and I do not remember where they came from. Possible from HACH
So, This meter can be Cal'd at for any range? Say my normal reading is 225 or so, should I be using 500 and 147 for cal standards?
I do not work at school anymore. Before I left we were about to change the standards for Conductivity, but so much was going on and I left that job for the new person (so I don't actually know how that works). For the second question I cannot answer as an environmental scientist. I cannot say if those standards are too restrictive or two broad (maybe someone here can answer that part). What I can say in my laboratory Those standards would be good ones because they cover most of the results you would be getting. Then if you get a result over 500 you can dilute the sample to get a result between 147 and 500, then multiply your result by the dilution factor. Also in my world, I would also run some quality control samples, for example one that gives a lower result like 200 and another control sample that gives a result of 400 to make sure your standard curve is accurate. Hope this helps a little.
how much the tolerance of star versa pro conductivity meter
What are the names of the Standard Solutions used?
At the time of the video I think it was 1428 and 12900 or something like that. The meter can use any standard and so the new instructor changed to different standards much closer to the samples they normally test. I do not remember the new standards. I stopped working at school in spring after making more videos. The students could not do labs because of covid. I had to leave the new set up for the new lab aide
0.475 calculate cell constant