voltmeter switch

基本解释

The three-pole switch was originally used to switch a voltmeter guard along with the signal lines.
三刀開關最早用於切換伏特計保護及信號線路。
And the excitation voltage and output were also fed through the selector switch to the digital voltmeter.
其激勵電壓和輸出也通過選擇開關接到數字電壓表上。
dict.site
The output trigger may be connected to a measuring device, such as a voltmeter. This will ensure the measurement is not made until the switch contacts have fully settled.
輸出觸發可被連接到一個測量裝置，例如伏特計。這樣能夠確保在開關觸點完全穩定之後再進行測量。