2-12 Model 2790 SourceMeter
®
Switch System User’s Manual
Programming errors
-222 Parameter out of range — Attempted to select a source (:SOURCe command)
with a 7702 card installed.
-241 Hardware missing — Attempted to select a source (:SOURCe command) that is
not installed.
+870 Invalid current error — Attempted to track an I-source that is set to 0mA. For
the low ohms calculation, “m” = 1 / I
SOUR
. Dividing 1 by 0 would result in an
erroneous reading (positive infinity).
Table 2-2
Commands to select ohms calculations
Commands Description Default
CALCulate[1]:FORMat <name> Select math function: NONE, MXB,
PERCent, RECiprocal, S1Iohms,
S1Vohms, S2Iohms, S2Vohms.
PERC
CALCulate[1]:FORMat? Query selected math format.
CALCulate[1]:STATe <b> Enable or disable math calculation.
CALCulate[1]:STATe? Query state of selected math calculation.
CALCulate[1]:DATA[:LATest]? Return last result of calculation.
CALCulate[1]:DATA:FRESh? Return last “fresh” result of calculation.
The following commands are set automatically when an ohms math function (SxIohms or SxVo-
hms) is selected using the :FORMat command. No further actions are required by the user.
CALCulate[1]:KMATh:MMFactor:TRACk <b> Enable or disable source tracking
1
. OFF
CALCulate[1]:KMATh:MMFactor:TRACk? Query state of source tracking.
CALCulate[1]:KMATh:MMFactor:SOURce <name> Selects source to be tracked: NONE,
S1ISource, S1VSource, S2ISource,
S2VSource.
NONE
CALCulate[1]:KMATh:MMFactor:SOURce? Query source to be tracked.
1
Selecting an ohms calculation enables source tracking. Selecting any other math function disables source tracking.
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