Recommended verification equipment
The following table summarizes recommended maximum allowable test equipment uncertainty for
verification points. Total test equipment measurement uncertainty should meet or be less than the
listed values at each test point. Generally, test equipment uncertainty should be at least four times
better than corresponding 2600B specifications.
1. Ninety-day specifications show full-range accuracy of recommended model used for specified measurement
point.
2. Id.
3. Id.
4. Resistor used to test 2601B, 2602B, 2604B 3 A range and 2611B, 2612B, 2614B, 2634B, 2635B, and 2636B
1.5 A range only should be characterized to uncertainty shown using resistance function of digital multimeter
before use.
5. Standard is a guarded and characterized 1 GΩ resistor that is used to test 2634B, 2635B, and 2636B 100 pA
to 100 nA current ranges.