What does “Accuracy” mean for my Data Logger? L What does “Accuracy” mean for my Data Logger? How close to being correct it is. The CDC recommends digital data loggers have an accuracy of +/-.5° C (+/-1° F) or better. Post navigationPrevious post: What does DDL Mean?Next post: What is a Traceable® Certificate? Leave a Reply Cancel replyYou must be logged in to post a comment.