IC660EBD120K
IC660EBD120K
IC660EBD120K使用條件 1)環(huán)境溫度:5~40℃
2)相對(duì)濕度:≤80%
3)電源電壓:AC198V~242V
4)電源頻率:(50±1)Hz
測(cè)量范圍:10~10000mg/L
測(cè)量相對(duì)誤差:≤10%
測(cè)量重現(xiàn)性:≤10%
零點(diǎn)漂移:±5mg/L
小測(cè)試周期:5min
信號(hào)輸出:4~20mA;RS485、RS232可選
體 積:54cm×54cm×160cm
重 量:65kg
可知,在供電電源頻率f1不變的條件下,通過(guò)改接定子繞組的連接方式來(lái)改變異步電動(dòng)機(jī)定子繞組的磁對(duì)數(shù)Pn,即可改變異步電動(dòng)機(jī)的同步轉(zhuǎn)速n0,從而達(dá)到調(diào)速的目的。這種控制方式比較簡(jiǎn)單,只要求電動(dòng)機(jī)定子繞組有多個(gè)抽頭,然后通過(guò)觸點(diǎn)的通斷來(lái)改變電動(dòng)機(jī)的磁對(duì)數(shù)。采用這種控制方式,電動(dòng)機(jī)轉(zhuǎn)速的變化是有級(jí)的,不是連續(xù)的,般多只有三檔,適用于自動(dòng)化程度不高,且只須有級(jí)調(diào)速的場(chǎng)合。
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