Keithley 6482, Справочное руководство

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6482-901-01 Rev. A / August 2012 Return to Section Topics 10-5
Model 6482 Dual-Channel Picoammeter / Voltage Source Reference Manual Section 10: Limit Testing
Pass condition
After the tests pass, the PASS message is displayed. Note that the pass condition can also be
determined with the :CALC7:LIM<n>FAIL? query over a remote interface.
If the Model 6482 is configured to test another DUT package, operation loops back to the top of the
flow chart and waits for the start-of-test (SOT) pulse.
Fail condition
When a failure occurs, the FAIL message is displayed and can also be read over a remote
interface with :CALC7:LIM<n>FAIL? command.
If configured to test another DUT package, operation loops to the top of the flow chart and waits for
the start-of-test (SOT) pulse.
Output enable connector
See Section 11 , “Output enable,” for more information.
SOT line
The input line (SOT) of the output enable connector is used to control the start of the testing
process. When
↓
STEST is the selected arm event of the trigger model, the testing process will
start when the SOT line is pulsed low. When
↑
STEST is the selected arm event, the testing
process will start when the SOT line is pulsed high. When
↑↓
STEST is the selected arm event, the
testing process will start when the SOT line is pulsed either high or low. With the IMMEDIATE arm
event selected, the testing process will start as soon as the LIMIT key is pressed (assuming the
output is ON). See
Section 8 for details on trigger model configuration and Section 11 for details
on the output enable connector.
Output enable (/OE) line
NOTE The forward slash (as shown /OE) designates that the pin is active low (in other words,
when connected to ground).
With proper use of output enable, power is removed from the DUT when the lid is opened. See
Section 11 , “Output enable,” for operation details.
Configuring and performing limit tests
Configuring limit tests
Press the CONFIG key and then the LIMIT key to display the CONFIG LIMITS MENU. The limits
configuration menu is structured shown below and in Figure 10-3 . The limits configuration menu is
structured as follows. Note that bullets indicate the primary items of the limit menu and dashes
indicate the options of each menu item. Refer to
Section 1 , “Rules to navigate menus,” to
configure the limit tests.
• H/W-LIMITS : Use this menu item to control and set the fail mode for the Limit 1 (channel 1)
and Limit 2 (channel 2) compliance tests:
– CONTROL : Use to ENABLE or DISABLE the test.
– FAIL-MODE : Use to select the fail mode for Limit 1 and Limit 2 tests. With IN selected,
the test will fail when the Model 6482 is in compliance. With OUT selected, the test will
fail when not in compliance.