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My RO system is being installed Friday morning, I decided to go the more expensive route and am renting it. They are going to start with changing the filters and DI every 3 months. Well see if it can go any longer than that. It's a 7 stage 100gpd system. I ordered one of these and they said they would plumb it in for me.
I have never heard of renting an RODI system. I’m just curious, but was it cheaper to go that route vs buying it outright?
I also have a couple questions about the inline tds meters. Is their accuracy affected by changes in temperature? Also, is there an average life expectancy for these inline tds meters, not just that they turn on and give a reading, but for accuracy as well? Another great video! Thanks
So on the back of the unit that you opened up to show the batteries, it said calibrate with NaCl. I know BRS sells calibration fluid, but how do you actually calibrate this unit? I have the single probe tds meter from BRS. Thanks @randyBRS
Thanks RandyI can't say that we've calibrated our in-line TDS meters here in the office and we haven't seen changes from their normal operating readings. However, if you'd like to calibrate them there are calibration instructions in the included manual. Here's a link to one from HM directly. http://hmdigital.com/wp-content/uploads/2016/11/sm1.pdf
-Randy
Thanks Randy
Here are the instructions for anyone else curious
Calibration Your monitor was factory calibrated to 342 ppm (NaCl). This level is suitable for most tap water/filtered water applications. However, you may need to re-calibrate based on your needs, as well as from time-to-time to ensure best results.
1. Purchase a calibration solution from your dealer that is correct for your needs.
2. Disconnect the T-Fitting from its hose. Do not remove the sensor from the T! Ensure the orientation of the sensor to the fitting is correct, as in the illustration.
3.Turn on the monitor and place the T-Fittings (with the sensor in it) into the calibration solution. You will get a reading.
4. If the reading on the monitor does not match the solution, adjust the reading up or down by gently turning the orange screw on the rear of the monitor clockwise or counter-clockwise.
5. The monitor should read approximately 10% below the calibration solution. The monitor is designed for flowing water and this discrepancy will compensate for that. (NOTE – if you are calibrating with a flowing solution, ignore this).
6. Once the reading is correct, turn the monitor off and remove from the solution.
Your monitor is now calibrated
Sounds good Ryan, thank you very muchLooks like they changed this a bit since last time I saw it.
At the factory, they calibrate with a flowing standard. The old instructions required you to do the same which just isn't feasible. Looks like they now say just calibrate to 10% lower to compensate. I'd also note the probes do read dramatically different inside the tee than outside the tee. It was almost 30% different last time I looked at it.
All in all, I would not attempt to calibrate these unless something is seriously wrong. I think most people are ten times as likely to decrease accuracy than increase it.
Will the tds ever change before it gets to the di resin? I have a 4 stage 150 gallon per day pre filterarion before the resin.
I’m wondering if there is a tell tail sign to tell me when the carbon filters or membrane is going bad
Will the tds ever change before it gets to the di resin? I have a 4 stage 150 gallon per day pre filterarion before the resin.
I’m wondering if there is a tell tail sign to tell me when the carbon filters or membrane is going bad