Excel ISERROR Function. The Excel ISERROR function returns TRUE for any error type that excel generates, including #N/A, #VALUE!, #REF!, #DIV/0!, #NUM!, #NAME?, or #NULL! You can use the ISERR function together with the IF function to test for an errors and display a custom message, or run a different calculation when found.
Meat is done when the temperature at its thickest point reaches the point at which it is safe to eat. That doesn't mean it's ready, though. According to USDA, ribs are done when they are 145Â°F internal temp, but they may still be tough. If you take them up to 190 to 203Â°F, the collagens and fats melt at this temp and make the meat more tender and juicy. Then they're ready!
To barbecue pork spare ribs: place ribs meat side up on a grill at low heat (for grills with temperature gauges, between 350 and 400 degrees). Brush sauce onto top of ribs, then flip ribs, and brush bottom side. the more barbecue sauce is exposed to heat without burning, the more the sugars crystallize.