Res - Keithley S530 User Manual

S530 Parametric Test System Test Subroutine Library User's Manual

res

This subroutine calculates the resistance of a two-terminal resistor (force I, measure V).
Usage
double res(int hi, int lo, int sub, double itest)
hi
lo
sub
itest
Returns
Details
This subroutine calculates the resistance of a two-terminal resistor by forcing a current and
measuring the voltage. The voltage is limited to 30 V.
If a positive substrate pin is specified, the substrate is grounded. If a positive substrate pin is not
specified, the substrate is left floating.
A delay is incorporated into the res subroutine; this delay is the calculated time required for stable
forcing of itest with a 30 V voltage limit.
Source-measure units (SMUs)

SMU1: Forces itest, 30 V voltage limit, measures voltage
Example
result = res(hi, lo, sub, itest)
Schematic
S530-907-01 Rev. A / September 2015
Input The HI pin of the device
Input The LO pin of the device
Input The substrate pin of the device
Input The forced current, in amperes
Output The calculated resistance:

0.0 = if the itest parameter is 0.0

2.0E+21 = Measured voltage is within 98 % of the default voltage
limit
Section 3: Test subroutine library reference
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