Does anyone have a DI meter built into their RO/DI?

[Myka]

Originally Posted by gregzz4

I've never had to cal mine since I bought them

What do you mean you've never had to? How long have you had the meter? You should calibrate every 3-6 months.

[gregzz4]

Originally Posted by Myka

What do you mean you've never had to? How long have you had the meter? You should calibrate every 3-6 months.

I calibrated them when I set the unit up in May, so I guess I'm due for another cal session
I thought they were good for a year