Keithley S530 User Manual

S530 Parametric Test System Test Subroutine Library User's Manual Section 3: Test subroutine library reference
S530-907-01 Rev. A / September 2015 3-55
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
Input
The HI pin of the device
lo
Input
The LO pin of the device
sub
Input
The substrate pin of the device
itest
Input
The forced current, in amperes
Returns
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
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

Keithley S530 Specifications

General

Brand	Keithley
Model	S530
Category	Test Equipment
Language	English