Datamax-O'Neil DPL Programmer’s Manual - Manual (Page 105)

Extended System-Level Command Functions
97
Sample: <STX>KHB<CR>
The sample above returns results from the last dot check for
the number of elements tested, the number of the bad or
suspect dot(s), the total number of bad or suspect dots, and the
minimum, maximum, and average resistance and variance:
DOTCHECK RESULTS
DOTS TESTED GOOD 830 OF 832
BAD DOT LIST
143
144
TOTAL BAD DOTS: 2
MIN MAX AVG VAR
921 1640 1125 719

The process normally adds a few seconds to the power-up sequence; however, if the
printhead is invalid or extremely damaged, it could take a minute to complete.