The difference can be tested between the value of the first path in the mode and that of the checked path.

Assuming that the value of the first path is meas_ref and the value of the path with the check of Diff Meas is meas_result, when they satisfy the following formula, the limit test of the measurement path is judged as pass.

limit_min ≤  (meas_result - meas_ref) ≤ limit_max

Both meas_ref and meas_result are corrected values.