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Old 03/10/2017, 12:25 PM   #26
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Join Date: Apr 2001
Location: N San Jose
Posts: 1,436
Digging up a old thread, just got a COM-100, post DI came out to be 0.5 us. the resolution won't go lower than 1/10 so there is no way to measure 0.05. Took the same meter to measure the MilliQ water and WFI (purest water you can get) at a pharmaceutical company and it came out to be 0.5 us as well even on the MilliQ monitor indicates 18.2 mohms. should it show at 0.0 us if COM-100 can't read 0.05.

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Old 03/10/2017, 01:20 PM   #27
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Even if the COM-100 could resolve 0.055 uS (18.3Mohm) it couldn't display it and it would have to round up to 0.1, not down to 0.00.

Only AIR should read 0.00.

There's an adjustment screw that you could use to calibrate it down to 0.1 to match (or approximate) the WFI sample.

This kinda goes back around to the first post in this thread.

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Old 02/22/2018, 11:15 AM   #28
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Location: Peoria, AZ
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Thanks for the info, I’m glad you guys know all this information and implement it in your systems so I can just continue to enjoy my reef. My MaxCap system has been preforming great btw! It handles even Phoenix’s crazy high 480 TDS tap like a champ!

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