Keithley 3700 series Reference Manual page 254

Section 9: Instrument Control Library (ICL)
dmm.refjunction
Remarks
Details
Example
dmm.rel.acquire
Function
Usage
Remarks
Also see
Example
dmm.rel.enable
Attribute
Usage
9-110
This attribute is only valid when dmm.func = "temperature". All other configurations
generate an error and return nil when queried.
Changing functions with dmm.func has no effect on this setting.
The factory default and dmm.reset function value is dmm.REF_JUNCTION_INTERNAL.
The default value is internal; change to simulated or external as needed.
To enable the simulated thermocouple reference junction:
dmm.func = "temperature"
dmm.refjunction = dmm.REF_JUNCTION_SIMULATED
Acquires an internal measurement to store as the REL level value.
rel_value = print(dmm.rel.acquire())
rel_value: The internal measurement acquired for the REL level value.
This function triggers the DMM to take a new measurement for the selected function.
This measurement will then be stored as the new REL level setting.
This function will return the acquired reading or nil, if an error occurred. An error will
be generated if the active function does not support a REL level setting or the DMM is
unable to take the measurement. When an error occurs, the REL level setting
maintains the last valid setting.
After executing this command, use the
the last REL level value that was acquired or set by the user. Setting the REL level
with this acquire function does not use the math, limit and filter settings. It will be a
calibrated reading as if these are disabled.
dmm.rel.level (on page 9-111)
To acquire a REL level value for temperature:
dmm.func = "temperature"
rel_value = dmm.rel.acquire()
Enables or disables relative measurement control for the DMM.
To read the relative control state:
value = dmm.rel.enable
value: Represents the present relative enable setting.
To write the relative control state:
dmm.rel.enable = value
value: Represents the desired relative measurement control setting. Set to one of the
following:
dmm.ON or 1 to enable relative measurements
dmm.OFF or 0 to disable relative measurements
Series 3700 System Switch/Multimeter Reference Manual
dmm.rel.level (on page 9-111) attribute to see
Document Number: 3700S-901-01 Rev. A / August 2007