Specifications 2
34980A Service Guide 13
[10]
Channel resistance is typically < 1.5 but can be as high as 50 when a channel is used in measurement applications with < 1 mA
load current. Increased relay channel resistance for measurements with load currents below 1 mA can occur on cards that have been
out of service or following relay inactivity for periods of greater than 1 week. Switching relays for 2k cycles prior to use typically
corrects this problem. Agilent recommends the use of 4-wire ohms for resistance measurements and the Hi-Z input impedance
configuration for voltage measurements. Applies to 34921A, 34922A, 34923A, and 34924A.
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