Conductivity calibration fluid?
- Thread starter tmccaff
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As long as it has the correct microsiemens rating, then yes, refractojuice works.
Randy Holmes-Farley
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You cannot assume that fluids for different devices are interchangeable. They may be, if they are close to seawater in composition, but many are not, including my diy fluids.
Randy Holmes-Farley
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Some options are:
1. My DIY designed for conductivity probes. Best used with a scale.
Reef Aquarium Salinity: Homemade Calibration Standards by Randy Holmes-Farley - Reefkeeping.com
2. A science conductivity standard ( I used this). For example:
Always in Stock - Myron L 30K QCP (NIST) conductivity calibration standard, 30,100 µS from Cole-Parmer
Buy Myron L 30K QCP (NIST) conductivity calibration standard, 30,100 µS and more from our comprehensive selection of MYRON L Conductivity Calibration Solutions
www.coleparmer.com
or
Potassium Chloride Standard Solution, 35.0 ppt Salinity, 53.0 mS/cm Conductivity, 500 mL
Potassium Chloride Standard Solution, 35.0 ppt Salinity, 53.0 mS/cm Conductivity, 500 mL
3. Hobby calibration standards that specifically list the conductivity on them (not the ppt). For example:
Neptune Systems Conductivity Calibration Solution - 53000 Microsiemens
53000 µS Conductivity Calibration Solution - Use this calibration solution to calibrate your Conductivity Probe and PM2 for saltwater salinity monitoring applications. Conductivity probes can be used for many different functions from letting you know the salinity of a tank to the quality of RODI...
www.bulkreefsupply.com
tmccaff
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@Randy Holmes-Farley According to manufacturer of Atlas Scientific I have to calibrate using two point calibration. How can I do this with GHL Profilux? Or do I just pick one point? I have 12,880 us solution and 80,000 us
Randy Holmes-Farley
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Their electronics may require it, but it’s is not a fact that two point calibration is needed in general
The ONLY thing that gets calibrated is the slope of the conductivity measurement because it MUST pass through zero where no conducting ions has zero conductivity. That is the mandatory second point when doing single point calibration.
If you need two points, then one point on either side of the expected measuring range is the best way. For seawater salinity, that point is 53,000 uS/cm.
For single point, just use what you can find that is close to the measuring range.
tmccaff
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Ok they sent me 12,800 and 80,000 which comes to 12.88ms and 80ms am I correct? I can put this in profilux but would it calibrate correctly? I guess should of got the Neptune one.
