Orp

[scotty333]

Hi guys,
Now I know there’s not much interest in ORP but I got a multi tester today , ph , orp, ec, salinity , temp

Orp was 84
Ph 8.3
Temp 25.5
Salinity 1.026

I don’t know what ec is for

Is that a normal reading for home reefs?

 

[lapin]

Did you atemp to calibrate it?

https://www.emerson.com/documents/automation/application-data-sheet-fundamentals-of-orp-calibration-rosemount-en-68452.pdf

 

[scotty333]

They claim it’s factory callabrated ready to use

 

[Randy Holmes-Farley]

EC is presumably conductivity, which is a different units of measure for salinity. 35 ppt seawater has conductivity of 53 mS/cm.

 

[scotty333]

Oh right , cheers boss I’ll have a check now

 

[scotty333]

61

 

[scotty333]

Calibrated the tester and it’s 190 when it should be 256 so it’s 66 low
Tank is 116 so Orp so will be 182