Milwaukee Instruments C66 conv. scale?

[Keifer2k3]

Hi, I received a Milwaukee ec pen C66 as a gift. It only reads ec. Which scale do I use to convert to ppm? Hanna, Eutech or Truncheon. 500 or 700ppm? I can't find easy to understand info on this. Can anyone help me please? Thanks in advance

 

[Oldchucky]

Google, why are there two scales on an EC Meter.

 

[Keifer2k3]

Google, why are there two scales on an EC Meter.

Thanks, I was confused on Google I just called Milwaukee Instruments and they told me it's the 500 scale. They also have the conversion calculator on their website. So I'm all straightened out. Thanks again

 

[Oldchucky]

No problem. I was wondering why the two scales also. Even though I don’t own a pen.

 

[Keifer2k3]

No problem. I was wondering why the two scales also. Even though I don’t own a pen.

Probably USA vs Europe idk