Model 309 Operating Software Notes


Operating Software versions x.62 and x.63 occasionally caused power up crashes due to initialization (boot) flaws. Click here for further information.

Operating Software versions prior to x.58 harbor a measurement flaw which can be significant under certain circumstances. Click here for further information.

Operating Software version x.65 eliminates these problems, and provides substantially improved overall performance and features, including a reading hold feature.


Click here to go to the Operating Software update page.

Click here to go to the quick Operating Software installation guide.


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