Keithley 2182 User Manual

NOTES 1. The fail message (“0”) for a limit test indicates that the reading is outside the
specified limits.
2. With auto clear enabled, the fail message (“0”) is cleared when the instrument
goes back into the idle state. If programmed not to go back into idle, you can
manually clear the fail condition by sending the CLEar[:IMMediate] command.
With auto clear disabled, the fail condition will have to be cleared manually.
3. When not in a continuous measurement mode (waiting for a trigger), you can
change the limits and re-test the last reading. After changing the limits, send
CALCulate3:IMMediate to re-perform the limit tests on the last reading. Note that
sending IMMediate does not initiate (trigger) a reading. It simply repeats the limit
tests on the last reading.
Programming example
The following program fragment performs limit tests on a voltage input to Channel 1:
‘Configure 2182 for one-shot DCV1 measurements:
CALL SEND(7, “*rst”,status%) ‘Put 2182 in a one-shot mode.
‘ Configure limit tests:
CALL SEND(7,“:calc3:lim:upp 0.1”,status%) ‘Set HI1 limit to 0.1.
CALL SEND(7,“:calc3:lim:low -0.1”,status%) ‘Set LO1 limit to -0.1.
CALL SEND(7,“:calc3:lim2:upp 1”,status%) ‘Set HI2 limit to 1.
CALL SEND(7,“:calc3:lim2:low -1”,status%) ‘Set LO2 limit to -1.
CALL SEND(7,“:calc3:lim:stat on”,status%) ‘Enable Limit 1 test.
CALL SEND(7,“:calc3:lim2:stat on”,status%) ‘Enable Limit 2 test.
‘Trigger one reading and display it:
CALL SEND(7,“:read?”,status%) ‘Trigger and request a
‘reading.
reading$ = SPACE$(80)
CALL ENTER(reading$, length%, 7,status%) ‘Address 2182 to talk.
PRINT reading$ ‘Display reading on CRT.
‘Check result of Limit 1 test:
CALL SEND(7,“:calc3:lim:fail?”,status%) ‘Request result of
‘Limit 1 test.
reading$ = SPACE$(80)
CALL ENTER(reading$, length%, 7, status%) ‘Address 2182 to talk.
PRINT reading$ ‘Display result of
‘Limit 1 test.
‘Check result of Limit 2 test:
CALL SEND (7, “:calc3:lim2:fail?”, status%) ‘Request result of
‘Limit 2 test.
reading$ = SPACE$(80)
CALL ENTER(reading$, length%, 7,status%) ‘Address 2182 to talk.
PRINT reading$ ‘Display result of
‘Limit 2 test.
8-6 Limits

Keithley 2182 Specifications

General

Brand	Keithley
Model	2182
Category	Measuring Instruments
Language	English