Keithley S530 User Manual

Section
3: LPTLib command reference S530/S540 KTE Linear Parametric Test Library (LPTLib) User's Manual
3-86 S530-900-01 Rev. E / September 2017
ssmeasX
This command makes a series of readings until the change (delta) between readings is within a specified
percentage.
Usage
int ssmeasi(int instr_id, double *result, double delta, unsigned int max_read, double
delay);
int ssmeasv(int instr_id, double *result, double delta, unsigned int max_read, double
delay);
instr_id
The instrument identification code of the measuring instrument; SMUn, CMTRn,
IMTR
n,
VMTR
n
result
The floating point variable assigned to the result of the measurement
delta
The termination definition; this is the percentage of the first reading that defines the
steady-state condition
max_read
The maximum number of readings made to determine whether or not the reading is
steady
delay
The delay between points to wait in seconds
Details
This command is used when the device stability is uncertain. It continually reads the instrument until
the resulting measurement is stable and provides the fastest measurement possible.
If the reading never stabilizes because of factors such as oscillations or charge and discharge, this
reading count expires and a reading of MEAS_NOT_PERFORMED (1.00E23) is returned.
Any instrument that uses the measX command can use the ssmeasX command. This command calls
the measX command for each reading. Any rangeX command rule applies to this command.
The ssmeasX command is used when making single-point readings. It is not used for any of the
combination measurements such as the XsweepY and trigXY commands.
Under certain test conditions, the ssmeasX command is not ideal. For example, an oscillation wher
e
t
wo contiguous measurements are within the given percentage will return a stable reading, even
though the device cannot be measured.

Keithley S530 Specifications

General

Brand	Keithley
Model	S530
Category	Test Equipment
Language	English

Summary

Safety Precautions

General Information

Introduction

Overview of the manual's structure and content.

Manual Contents

Details the structure and information presented in each section.

Linear Parametric Test Library (LPTLib)

Introduction

Introduces the Keithley LPTLib as a low-level software interface for parametric testers.

Measuring

Discusses the tester's ability to make measurements, including ordinary, integrated, and averaged.

Ranging

Discusses automatic range selection (autoranging) and its features like smart and sticky ranging.

Optimizing Test Sequences

Introduces methods to optimize the S530/S540 for faster operation.

LPTLib Command Reference

Conventions Used in this Manual

Explains conventions like case-sensitivity and parameter formatting.

Source Commands

Lists commands for controlling sources like forceX, limitX, pulseX.

Measure Commands

Lists commands for measurements like avgX, bmeasX, intgX.

Pulse Generator Commands

Lists commands for pulse generator units (PGU) like pgu_current_limit, pgu_delay.

Error Definitions

Result Values Indicating an Error

Table of error values returned as measured results and their meanings.

Error Messages

Lists error messages with numbers, descriptions, and remarks.