Trident priming

[Joe Rice]

I recently ran the calibration cycle on my Trident and it got me wondering why it was necessary to prime the sample line before and after switching to/from the calibration fluid. Seems to me that the Trident must evacuate the sample line every time it does a test since it doesn't want to test the fluid left over in the sample line from the last test.

So why is priming necessary? @JimWelsh

 

[TheHarold]

I am *guessing* its to maximize accuracy.

After all, the new water does “mix” with the old water in the tube at some level. Extra priming (beyond just the tube length) would purge that small amount of mixing. The vial they use is only so large

 

[JimWelsh]

I defer to Neptune Systems on this one. I'm responding just to acknowledge the mention.