Specifications

605xA and 606xB: Electronic Load Resistance Accuracy
Question: How do I determine Resistance Accuracy in the Electronic Load Family?
Answer: The 6060B specifications will be used for this example. The resistance accuracy of other models can be
determined by substituting the accuracy specifications of the other model in the example below.
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For the 6060B low range and a desired resistance of 1 ohm, the calculations are:
Low range accuracy specification is +/-0.8% + 0.008 ohms
Ohms + [( Ohms * accuracy percentage ) + offset ] = high specification point 1+((1*0.008)+0.008) = 1.016 ohms
Ohms - [( Ohms * accuracy percentage ) + offset ] = low specification point 1-[(1*0.008)+0.008] = 0.984 ohms
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For the 6060B middle and high ranges, and a desired resistance of 50 ohms the calculations are:
Middle and high range accuracy specification is +/-0.3% + 0.008 Seimens.
The middle and high range specifications are in Seimens so the ohmic value must be changed to Seimens before the
calculations are performed, then changed back to ohms. Seimens = 1 / Ohms
Seimens + [( Seimens * accuracy percentage ) + offset ] = high Seimens point
1 / high Seimens point = low resistance specification point
1/50+((1/50*0.003)+0.008) = 0.028 Seimens
1/0.028 = 35.6 ohmsSeimens - [( Seimens * accuracy percentage ) + offset ] = low Seimens point
1 / low Seimens point = high resistance specification point
1/50-[(1/50*0.003)+0.008] = 0.0119 Seimens
1/0.0119 = 83.75 ohms
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For more detailed information, read Appendix A in the 606xB Operating Manual or 605xA Operating Manual,
which can be found on this CD-ROM.