Interactive SourceMeter® Instrument Reference Manual Section 8:
2450-901-01 Rev. B/September 2013 8-107
smu.measure.limit[Y].fail
This attribute queries the results of a limit test.
Type TSP-Link accessible Affected by Where saved Default value
Attribute (R) Yes Function change Not applicable Not applicable
Usage
result = smu.measure.limit[Y].fail
The results of the limit test for limit Y:
• smu.FAIL_NONE: Test passed; measurement under or equal to the high limit
• smu.FAIL_HIGH: Test failed; measurement exceeded high limit
• smu.FAIL_LOW: Test failed; measurement exceeded low limit
•
: Test failed; measurement exceeded both limits
Details
These commands query the result of a limit test for the selected measurement function.
The response message indicates if the limit test has passed or how it failed.
Reading the results of a limit test does not clear the fail indication of the test. To clear a failure, send the clear
command.
Note that if you are making a series of measurements and auto clear enabled for a limit, the last measurement
limit dictates the fail indication for the limit. If autoclear is disabled, you can take a series of readings and read
fails to see if any of one of the readings failed.
To use this attribute, you must set the limit state to enable.
If the readings are stored in a reading buffer, the values are associated with bufferVar.statuses for the
readings.
Example
This example enables limits 1 and 2 for voltage, measurements. Limit 1 is checking for readings to be between 3
and 5 volts, while limit 2 is checking for the readings to be between 1 and 7 volts. The auto clear feature is
disabled, so if any reading is outside these limits, the corresponding fail is 1. Therefore, if any one of the fails is
1, analyze the reading buffer data to find out which reading failed the limits.
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