Section 3: Functions and features
Model 2461 Interactive SourceMeter® Instrument Reference Manual
3-134
2461-901-01 A/November 2015
Limit testing and binning
The Model 2461 can be set up for limit testing and binning. It can perform simple benchtop limit
testing using the front panel or sophisticated limit and binning operations using the trigger model and
digital I/O to control external component-handling devices.
Some typical forms of limit testing include:
•
Simple pass-or-fail testing.
•
Resistor grading: Inspect multiple limits until the first failure is received.
•
Resistor sorting: Inspect multiple limits until the first pass is received.
For binning applications, you use limit testing to determine placement of tested parts. To set up the
instrument to place the part in the correct bin, you do the following steps:
•
Determine and record a bin number for later use.
•
Output a digital bit pattern to physically place the tested device in a bin.
•
If multiple tests are performed on the same part, determine when the part should be binned:
•
Bin the part as soon as it fails a test.
•
Bin the part after all parameters are measured; bin according to the first failure or a combination of
failures.
Limit testing allows you to set high and low limit values. When the reading falls outside these limits,
the instrument displays L1FAIL or L2FAIL.
The limit values are stored in volatile memory.
Limits are tested after any selected filter, relative offset, and math functions have been applied to the
measurement.
The Model 2461 provides two binning trigger model templates to assist with setup, one for grading
and one for sorting. Refer to
(on page 3-125).
Limit testing using the front-panel interface
You can do pass or fail limit testing through the front panel. When limit testing and a test fails, the limit
(#1 or #2) that failed is shown on the Home screen.
Using the front panel:
1. Press the
MENU
key.
2. Under Measure, select
Settings
.
3. Next to Limits, select
View
.
4. To enable limit testing, set the state to
On
(left column for limit #1 and right column for limit #2).