If you know what ERN, TP, PR, and URRS mean, the you know what this chart is all about (if you don’t know yet, have a look here). North Fork’s graphic designer slaved over red-hot pixels to get this thing into shape, and now it’s yours to download and have for your very own.

The chart is available—thanks to Dr. Bill Hanneman’s behind-the-scenes work—as a free PDF file. It covers ERN/TP/PR numbers from 1 to 200, and is set in cents (U.S. cents), grams/kilos, and grains. It does not tell you how to use the CCS system. It is a data chart only! It is also big, as in 11X17 inches, so unless you have a large-format printer, you may need to take a little trip over to a Kinkos, a PiP, etc.

We had a good once-over of the chart before releasing it, but if anyone finds errors, please let us know! We want it to be accurate and will adjust as necessary going forward.

Click the pic to download (643KB):

And since we’d be remiss to include some how to, here’s a bit on that, as well:
The bottom of each blue grid shows the numbers of cents (or rolls of cents) used when trying to get any of the ERN, TP or PR values. Those values (1, 2, 3, 4, etc.) are shown in pale red next to the orange lines, which indicate the range of that particular ERN, TP, or PR value. The small bright red numbers over on the left side of the grids show the “tenths” of the ERN/TP/PR values (or for very powerful rods, as on the bottom grid, the whole number value).

For example, one may have used 41 cents to bend a rod to one-third of its length, and one wants to find the corresponding ERN value. One then looks at the grid where the “40″ cent value can be found, and moves over one grid unit to where the value would be “41″ (each unit is a step of “1″). One can then see that the value of “5″ (in pale red) starts right there (the orange line begins at that point). One can also see that on the far left of the grid, the small red number “0″ corresponds to that orange line starting position. That means that the ERN (or TP or PR) value is 5 + .0 — in other words “5.0″.

If the cents used to bend a rod to one-third of its length would have been 45, instead of 41, one would still look at the grid where the “40″ cent value can be found, but then one would move over five grid units to where the value would be “45″ (halfway between 40 ad 50). Moving up the grid to the orange line, one can see that it indicates an ERN (or TP or PR) value of 5 + .6 (the bright red numbers on the far left indicate .6 at that point). Thus the ERN (or TP or PR) is “5.6″.

And for one more…take a look at the top of any of the blue grids. See the “grams” (and kilos) values?” Let’s say you used 200 grams to bend a rod to one-third of its length and you want that ERN number. It works exactly the same as for the cents, just follow the grid line to orange line. Where they intersect gives you the value that you are after. So, 200 grams gives me a value (ERN, TP or PR) of 9 + .8. In other words, “9.8″.

Go measure!