Atec Agilent-E4980A - Manual (Page 23)

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DC resistance (Rdc) accuracy
Absolute measurement accuracy Aa
Absolute measurement accuracy Aa is given as
Equation 15. Aa = Ae + Acal
Aa Absolute accuracy (% of reading value)
Ae Relative accuracy (% of reading value)
Acal Calibration accuracy
Relative measurement accuracy Ae
Relative measurement accuracy Ae is given as
Equation 16. Ae = [Ab + (Rs /|Rm|+ Go × |Rm|) Ч 100 ] Ч Kt
Rm Measurement value
Ab Basic accuracy
Rs Short offset [Ω]
Go Open offset [S]
Kt Temperature coefficient
Calibration accuracy Acal
Calibration accuracy Acal is 0.03%.
Basic accuracy Ab
Table 42. Basic accuracy Ab is given below.
Measurement Test signal voltage
time mode ≤ 2 Vrms > 2 Vrms
SHORT 1.00% 2.00%
MED 0.30% 0.60%
Open offset Go
Table 43. Open offset Go is given below.
Measurement Test signal voltage
time mode ≤ 2 Vrms > 2 Vrms
SHORT 50 nS 500 nS
MED 10 nS 100 nS
Short offset Rs
Table 44. Short offset Rs is given below.
Measurement Test signal voltage
time mode ≤ 2 Vrms > 2 Vrms
SHORT 25 mΩ 250 mΩ
MED 5 mΩ 50 mΩ