Keithley 3700 series Reference Manual page 252

Section 9: Instrument Control Library (ICL)
dmm.opendetector
Attribute
Usage
Remarks
Example
dmm.range
Attribute
Usage
9-108
Indicates the state of the thermocouple or four-wire ohms open lead detector being used.
To read the open lead detector state:
value = dmm.opendetector
value: Represents the present open detector state
To write the open lead detector state:
dmm.opendetector = value
value: Represents the desired open detector state. Set to one of the following:

dmm.ON or 1 to enable the open lead detector

dmm.OFF or 0 to disable the open lead detector
This attribute is valid when dmm.func = ―temperature‖. It also is valid when dmm.func =
―fourwireohms‖. All other configurations generate an error and return nil when queried
(including ―twowireohms‖).
Changing functions with dmm.func has no effect on this setting.
The factory default and dmm.reset function value is dmm.OFF.
To enable the thermocouple open detector:
dmm.func = "temperature"
dmm.opendetector = dmm.OFF
Indicates the range of DMM for the selected function.
To read the range for the selected function:
value = dmm.range
value: Represents the present range for the selected function.
To write the range for the selected function:
dmm.range = value
value: Represents the expected measurement value or desired range for the selected
function.
Series 3700 System Switch/Multimeter Reference Manual
Document Number: 3700S-901-01 Rev. A / August 2007