Series 2600 System SourceMeters Reference Manual Instrument Control Library 12-77
Return to Section 12 topics 2600S-901-01 Rev. A / May 2006
smuX.measure.rel.enableY
X = SMU channel (a or b)
Y = SMU measure function (v, i, r or p) where:
v = voltage, i = current, r = resistance, p = power
Attribute Relative measurement control (on/off).
Usage
rel = smuX.measure.rel.enableY -- Reads relative state.
smuX.measure.rel.enableY = rel -- Writes relative state.
Set rel to one of the following values:
0 or smuX.REL_OFF Disables relative measurements.
1 or smuX.REL_ON Enables relative measurements.
Remarks When relative measurements are enabled, all subsequent measured readings will be
offset by the specified relative offset value (see
smuX.measure.rel.levelY).
Specifically, each returned measured relative reading will be the result of the following
calculation:
Relative reading = Actual measured reading – Relative offset value
Details See “Rel” in Section 6.
Also see smuX.measure.rel.levelY
Example
Enables relative voltage measurements for SMU A:
smua.measure.rel.enablev = smua.REL_ON
smuX.measure.rel.levelY
X = SMU channel (a or b)
Y = SMU measure function (v, i, r or p) where:
v = voltage, i = current, r = resistance, p = power
Attribute Offset value for relative measurements.
Usage
relval = smuX.measure.rel.levelY -- Reads relative offset level.
smuX.measure.rel.levelY = relval -- Writes relative offset level.
relval Relative offset value.
Remarks When relative measurements are enabled (see smuX.measure.rel.enableY), all
subsequent measured readings will be offset by the specified relative offset value.
Specifically, each returned measured relative reading will be the result of the following
calculation:
Relative reading = Actual measured reading – Relative offset value
Details See “Rel” in Section 6.
Also see smuX.measure.rel.enableY
Example
Performs a voltage measurement and uses it as the relative offset value:
smua.measure.rel.levelv = smua.measure.v()
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