Beckman 660 pH meter. Part # 511220

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Hi,

On the screen of my Beckman 660 pH meter. When we would alibrate that meter, there used to be only one line for the standard readings. But now for some reason, the screen has 2 lines and almost looks like it is calling for 5 differnt standards.

Any thoughs on how I might be able to get back to 1 line and to where the meter is asking for 2 standards?

Please help.

Thanks!

I didn't find the right solution from the Internet.

References www.labwrench.com/?community.posts/threadNo/165283/subject/Beckman-660-pH-meter--Part---511220/

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