控制仪表必须和它所配套的真空炉一样精确。起初,仪表由读盘或表格记录仪读出,需要人工操作反馈。第二阶段使用内联电磁继电器凸轮和电流表的逻辑系统组合。60年代初期,使用模拟电子系统减少了操作员干预,但它们局限性很大,仅仅限于单一系统,而且建立起来很慢。二极晶体管逻辑(DTL)系统有记忆能力,但实在太笨重了。使用晶体管——晶体 The control meter must be as precise as the vacuum oven it is equipped with. At first, the meter is read by a disk reader or a form recorder, requiring manual feedback. The second stage uses a combination of logic system of inline electromagnetic relay cam and ammeter. The use of analogue electronic systems reduced operator intervention in the early 1960s, but their limitations were limited to a single system and slow to establish. The Diode Transistor Logic (DTL) system has memory capabilities, but it’s too bulky. Use transistors - crystals