6482-901-01 Rev. A / August 2012 Return to Section Topics 10-7
Model 6482 Dual-Channel Picoammeter / Voltage Source Reference Manual Section 10: Limit Testing
• Remember that Limit 1 and Limit 2 are the compliance limits for channel 1 and channel 2
respectively, while the data source for Limit 3 through Limit 6 depends on the selected
FEED (MSR1, MSR2, RATIO, or DELTA).
Step 4. Turn output on.
Press the ON/OFF key to turn the output on (blue OUTPUT indicator turns on). The Model 6482
will output the programmed bias voltage level.
Step 5. Start testing process.
To enable the limit tests, press the LIMIT key. If the /SOT line of the OUTPUT ENABLE connector
is set to receive a low-going pulse a /SOT pulse, the testing process will not start until /SOT line
receives a low-going pulse. Otherwise the testing process will start when LIMIT key is pressed.
NOTE The SOT line may be configured for a high-going pulse, or configured for either a low or
high-going pulse. See “Event detection” on page 8-3 for more information..
Step 6. Stop testing process.
The testing process can be terminated at any time by again pressing the LIMIT key.
Remote limit testing
Limit commands
Table 10-1 summarizes remote commands to control limit testing. Note that LIMitX refers to
identical software limits LIMit3 through LIMit6. See Section 16, “CALCulate7” for more details on
these commands.
Table 10-1
Limit commands
Command Description
:CALCulate7:LIMit[1]:COMPliance:FAIL <name>
:CALCulate7:LIMit[1]:STATe <state>
:CALCulate7:LIMit[1]:FAIL?
:CALCulate7:LIMit2:COMPliance:FAIL <name>
:CALCulate7:LIMit2:STATe <state>
:CALCulate7:LIMit2:FAIL?
:CALCulate7:FEED <name>
:CALCulate7:LIMitX:LOWer <n>
:CALCulate7:LIMitX:UPPer <n>
:CALCulate7:LIMitX:STATe <state>
:CALCulate7:LIMitX:FAIL?
:CALCulate7:CLIMits:CLEar
:CALCulate7:CLIMits:CLEar:AUTO <state>
Set Limit 1 fail condition. Name = IN (fail into compliance)
or OUT (fail out of compliance).
1
Enable or disable Limit 1 test (state = ON or OFF).
Query Limit 1 test result (0 = pass, 1 = fail).
Set Limit 2 fail condition. Name = IN (fail into compliance)
or OUT (fail out of compliance).
Enable or disable Limit 2 test (state = ON or OFF).
Query Limit 2 test result (0 = pass, 1 = fail).
Select Limit 3-6 tests input path (name = CALC3, CALC4,
CALC5, or CALC6).
2
Specify lower Limit X.
3
Specify upper Limit X.
Enable or disable Limit X test (state = ON or OFF).
Query Limit X test result (0 = pass, 1 = fail).
Clear test results, reset I/O port.
Enable or disable auto-clear (state = ON or OFF).
1
LIMit[1] dedicated to channel 1; LIMit2 dedicated to channel 2 (hardware limits).
2
CALC3 = channel 1 measurement; CALC4 = channel 2 measurement; CALC5 = RATIO; CALC6 = DELTA.
3
LIMitX = LIMit3, LIMit4, LIMit5, and LIMit6 (software limits).
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