Keysight B2980B Series - Page 225

Keysight B2980B User’s Guide, Edition 1 225
Function Details
Math Expression
LOG10 = LOG(CURR[c])
POLYNOMINAL Calculates the following polynominal expression.
POLYNOMINAL = A2 * CURR[c] * CURR[c]  A1 * CURR[c]  A0
where, A2, A1, and A0 are the predefined math variables.
SRESISTIVITY Calculates sheet resistivity () from the resistance measurement data using the
following formula.
SRESISTIVITY = EPER / GLEN * RES[c]
where, EPER (mm) and GLEN (mm) are the predefined math variables.
VRESISTIVITY Calculates volume resistivity (cm) from the resistance measurement data using
the following formula.
VRESISTIVITY = EAR / STH * RES[c] / 10
where, EAR (mm
2
) and STH (mm) are the predefined math variables.
POWER Calculates power using the following formula.
POWER = VOLT[c] * CURR[c]
OFFCOMPOHM Calculates offset compensated ohms (resistance) using the following formula.
OFFCOMPOHM = (VOLT[c][1]VOLT[c][0]) / (CURR[c][1]CURR[c][0])
where, VOLT[c][0] and CURR[c][0] are the data measured at a measurement
condition, and VOLT[c][1] and CURR[c][1] are the data measured with a different
measurement condition.
This function is effective for reducing measurement error in low resistance
measurement.
VOLTCOEF Calculates voltage coefficient using the following formula.
VOLTCOEF = (RES[c][1]RES[c][0]) / (RES[c][1] * (VOLT[c][1]VOLT[c][0])) * 100 %
where, RES[c][0] and RES[c][1] are the resistance measurement data at the first
and second measurement points, respectively, and VOLT[c][0] and VOLT[c][1] are
the voltage measurement data at the first and second measurement points,
respectively.
The voltage coefficient is known as the ratio of the fractional change for a resistor
whose resistance varies with voltage.