To explain my problem in detail, here is the actual chart. Now I have 3 more charts like this as every chart belongs to one hook of the crane and there are 4 hooks in total. Name: Chart.jpg Views: 4116 Size: 71.8 KB

As you can see above the radius ranges from 2 to 16. I have break it down to 0.1 increments for the sake of accuracy. So when I reach from 2 to 3, I already will have 10 values, then another 10 and in total around 140 values. Similar concept goes for the Boom length in meters @ 0.1 increments.

Now I can get the reading of boom length and I can get my Radius value. Now based on these two values, I need to pick the value of the weight from this chart.

Since I will have so many values, I am even doubting now if I can actually do it using an 877. I will go through your answers in detail later and see if it will be possible. Thanks for the replies.