Specifications

661xC and 663xB: Current Measurement Ranges
Question: Do the 661xC and 663xB Series power supplies have more than one current measurement range? What is
the current measurement resolution? How do I switch between them?
Answer: Yes, these models feature TWO 16-bit current measurement ranges. The high range covers the full output,
with an LSB ranging from approximately 20 uA for 1A output to 436 uA for the 10A output.
Model Max Current Resolution
6611C 5 A 213 uA
6612C 2 A 74 uA
6613C 1 A 37 uA
6614C 0.5 A 20 uA
6631B 10 A 436 uA
6632B 5 A 213 uA
6633B 2 A 74 uA
6634B 1 A 20 uA
All models have a low range of 20.0 mA full scale, with an LSB of 0.6 uA. You can select either the high or low
range, or autoranging between the two. With autoranging, range switching is triggered whenever the current crosses
above/below 20.0 mA.