My new house with a pool

[PoolDoc]

That's fine.

But make sure you do a double buffer calibration on the pH meter. Regardless of their cost, pH meters are USELESS without calibration OR if they have old or plugged electrodes.

And keep in mind that if you use the HACH DPD method . . . it is subject to the EXACT same problems as the Taylor 1004.

If you have a spec, you probably can do accurate dilutions. Test with OTO drops first: a DARK yellow OTO result is probably out of range for the HACH; orange certainly is. If you get a dark yellow or orange result, do a 1:3 dilution with distilled water, and multiply the HACH result x4 .

[SBR_GUY]

That's fine.

But make sure you do a double buffer calibration on the pH meter. Regardless of their cost, pH meters are USELESS without calibration OR if they have old or plugged electrodes.

And keep in mind that if you use the HACH DPD method . . . it is subject to the EXACT same problems as the Taylor 1004.

If you have a spec, you probably can do accurate dilutions. Test with OTO drops first: a DARK yellow OTO result is probably out of range for the HACH; orange certainly is. If you get a dark yellow or orange result, do a 1:3 dilution with distilled water, and multiply the HACH result x4 .

I calibrated it this morning using a 4PH, 7PH & 10PH buffer. It cal'ed to with in .02 of each other. This HACH will test to 10 Cl anything above that will be off scale high.
This is the HACH we have. http://www.equipcoservices.com/renta...otometers.html

I work as an Operator at a Power Plant and we make our own Demineralized water and Potable water plus we have to do our own Boiler water testing. We have lots of cool testing equipment. LOL