If using a separate current source and voltmeter to make low resistance measurements, each instrument must be checked for non-ohmic contacts.

如果使用分离的电流源和电压表来进行低电阻测量，则必须检查每台仪器的非欧姆接触情况。

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Test and mark the resistance value of the old elements having been replaced (with voltmeter and ammeter) and distribute them in low temperature area.

换下来的元件重新（用压表、电流表）测标其电阻值，配阻用在低温区。

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