The part number you see on the channel card circuit board is not the part number for the channel card. It is the part number for the circuit board before any parts are installed.
There are 2 versions on the channel card.
If you look at your channel card you will see there are either 1 or 2 blue "boxes" on it.
If you see 1 Blue box your channel card has common Isolation - the part number is AV55M-A1
If you see 2 Blue boxes your channel card has individual isolation - the part number is AV55M-B1
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ZR22/AV550G多通道氧浓度分析系统
AV550G多通道分析系统氧气浓度计允许至多8台ZR22探头同时进行测量。ZR探头的在线测量方法无需任何工艺调节或样品抽取。因此可降低维护成本，且能够更快地测量来响应过程变化。
