Hioki RM3545, Instruction Manual, Page: 34 / 364

1.3 Measurement Process
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*1 About zero-adjustment
Perform zero-adjustment in the following circumstances:
•
The measured value is not cleared due to thermal EMF or other factors.
→
The measured value will be adjusted to zero. (*2)
•
Four-terminal connection (called Kelvin connection) is difficult.
→
The residual resistance of the two-terminal connection wires will be canceled.
See: "4.3 Zero Adjustment" (p.68)
"Appendix 6 Zero Adjustment" (p.7)
*2 Accuracy specifications vary when zero-adjustment has not been performed.
For more information, see "Chapter 13 Specifications" (p.249).
Thermal EMF can also be canceled by using OVC.
See: "4.8 Compensating for Thermal EMF Offset (Offset Voltage Compensation - OVC)" (p.82)