求翻译：当“自动下限校准”=66时，按SET键，校准远程设定信号的下限值。远程设定信号可以是4-20MA 0-10MA 0-20MA，在外部设定输入信号端上输入下限信号4MA或0MA（此时S4E=1），通过键盘修改S4=66，按SET键，校准下限值，使流量设定值为0。是什么意思？

When the "automatically lower calibration" when =66, press the SET key, lower limit value for the calibration of remote setting signal. Remote set signal can be 4-20MA 0-10MA 0-20MA, enter the lower limit on the external set input signal-end signal or 0MA 4MA (S4E=1), modified S4=66 by using the key

When “automatic lower limit calibration” =66, presses the SET key, the calibration long-distance hypothesis signal lower limiting value.The long-distance hypothesis signal may be 4-20MA 0-10MA 0-20MA, carries input lower limit signal 4MA or 0MA in exterior hypothesis input signal (this time S4E=1),

When the "automatically lower calibration" when =66, press the SET key, lower limit value for the calibration of remote setting signal. Remote set signal can be 4-20MA 0-10MA 0-20MA, enter the lower limit on the external set input signal-end signal or 0MA 4MA (S4E=1), modified S4=66 by using the key

When the "automatically lower calibration" when =66, press the SET key, lower limit value for the calibration of remote setting signal. Remote set signal can be 4-20MA 0-10MA 0-20MA, enter the lower limit on the external set input signal-end signal or 0MA 4MA (S4E=1), modified S4=66 by using the key