Release time is the opposite of actuation time. It is measured from the time power is removed from the coil until the contacts have settled, again including bounce.
释放时间与触动时间是相对应的。它衡量的是从线圈断开激励到触点达到稳定所需的时间，也包括回跳。
2
This charge transfer is due to the mechanical release or closure of the contacts, the contact-to-coil capacitance, and the stray capacitance between signal and relay drive lines.
Auto ground: Automatic ground balance - raise search coil off ground, press the auto ground button, lower the coil to the ground, and release the button for precision auto-balancing.