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.
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