FUTEK IPM600 (D610) Digital Display - Manual (Page 72)

7.HOLD FUNCTIONS
61
The Hold Function in General
The delay times of the judging signal and the H/E signal do not include a delay
time of the analog circuit (low-pass filter). Also, the delay times are calculated
without the digital filter. Since the judging signal and the H/E signal are
generated for the value produced through the analog and digital filters,
transmission of the signals becomes slower and the delay of each output
signal increases with enhancement of the filters.
If the H/M signal is continuously input, the previously held value is reset by
the on timing, and hold operation newly starts.