Keithley 2700, User Manual, Page: 69 / 500

2-14 Close/Open Switching Module Channels Model 2700 Multimeter/Switch System User’s Manual
Non-amp and non-measure switching modules
There are Keithley switching modules that do not support current measurements and there
are modules that do not support any measurements at all.
Non-amps module — With an amps function selected (DCI or ACI), system channel
operation cannot be used to close channels on that module.
Non-measure module — For front panel operation, system channel operation cannot be
used to close channels. For remote programming, system channel operation can be used,
but only the one specified channel will close. All other channels on the module will open.
Non-amps switching modules
NOTE Presently, non-amps Keithley modules include the Models 7701, 7703, 7706,
7707, 7708, and 7709. You can check the Keithley website (www.keithley.com)
for new modules.
A non-amp module does not support amps measurements. System channel operation
cannot be used to close channels while an amps function (DCI or ICI) is selected.
If an amps function (DCI or ACI) is selected and you attempt to close a system channel,
the message “NO AMPS CHAN” will be displayed briefly. For remote programming,
error -222 (Parameter data out of range) is generated. Example:
SYST:PRES ' Restores system preset defaults.
SENS:FUNC ‘CURR:DC’ ' Selects DCI function.
ROUT:CLOS (@101) ' Attempts to close system channel 101 – Generates
' error -222.
If a system channel is already closed and you attempt to select the DCI or ACI function,
the message “INVALID FUNC” will be displayed briefly. For remote programming,
error -221 (Settings conflict) is generated. Example:
SYST:PRES ‘ Restores system preset defaults.
ROUT:CLOS (@101) ‘ Close system channel 101.
SENS:FUNC ‘CURR:DC’ ‘ Attempts to select DCI function – Generates
‘ error -221.
Making amps measurements — In order to perform amps measurements, you must use
the front panel inputs of the 2700 mainframe. You can still use the non-amps module for
other aspects of the test, but you must use multiple channel operation to close channels.
Example:
NOTE In order to use the front panel inputs, make sure the INPUT switch is in the out
(F) position.
SYST:PRES ' Restores system preset defaults.
ROUT:MULT:CLOS (@101) ' Closes channel 101.
SENS:FUNC ‘CURR:DC’ ' Selects DCI function – Legal operation.