Keithley 2001 User Manual

IEEE-488 Reference
4-71
limit of LIMIT 1 is the first failure. If programmed for active-low polarity, the output line will
go low (true) when the upper limit of LIMIT 1 is the first failure. Polarity is programmed from
the Output subsystem (see paragraph 4.17).
Note that when the binning strobe is enabled (see :BSTRobe command path), output line #4 is
not considered to be part of the digital output pattern. The binning strobe uses line #4. With the
binning strobe enabled, parameters 8 through 15 are treated the same as parameters 0 through 7.
Programming example
10 OUTPUT 716; “:calc3:lim:upp:sour 4; sour?”
20 ENTER 716; A$
30 PRINT A$
40 END
Line 10 Specifies output line #3 to go true if the upper limit of LIMIT 1 is exceeded, and then
queries the source value.
Line 20 Addresses the Model 2001 to talk.
Line 30 Displays the source value (4).
:STATe <b>
:CALCulate3:LIMit[1]:STATe <b> Control LIMIT 1 test
:CALCulate3:LIMit2:STATe <b> Control LIMIT 2 test
Parameters
<b> = 1 or ON Enable specified limit test
= 0 or OFF Disable specified limit test
Formats
:calc3:lim:stat <b>
:calc3:lim2:stat <b>
Defaults
Power-up Saved power-on setup
*RST OFF (both limit tests)
:SYSTem:PRESet OFF (both limit tests)
Query
:STATe? Query state of specified limit test
Short-form formats: :calc3:lim:stat?
:calc3:lim2:stat?
Response message: 0 (off) or 1 (on)
Description
These commands are used to enable or disable LIMIT 1 and LIMIT 2 tests. When enabled, the
test sequence for limits will be performed every time the instrument performs a measurement.
Testing is performed in the following sequence: Low Limit 1, High Limit 1, Low Limit 2 and
High Limit 2. Any limit test (LIMIT 1 or LIMIT 2) not enabled is simply not performed.
The first failure in the test sequence will determine which digital pattern will be applied to the
output port. For example, if the lower limit of LIMIT 1 fails, the digital pattern defined for
LIMIT 1 lower limit failures will be applied to the output port. The other tests will still be
performed, but a failure will not change the digital pattern on the output port.
If both the lower and upper limits of LIMIT 1 pass, the test sequence will proceed on to test the
limits of LIMIT 2 (if enabled). If all the enabled test limits pass, then the programmed “pass”
digital pattern (see :PASS:SOURce) will be applied to the output port.

Keithley 2001 Specifications

General

Brand	Keithley
Model	2001
Category	Multimeter
Language	English