Keithley 3700 series Reference Manual page 253

Series 3700 System Switch/Multimeter Reference Manual
dmm.range
Remarks
Example
dmm.refjunction
Attribute
Usage
Document Number: 3700S-901-01 Rev. A / August 2007
This attribute is the range setting for the selected function (see dmm.func) of the DMM.
Querying the range when the selected function does not have a range associated with it
will cause nil to be returned.
The range will be selected based on which one best suits the expected measure value
(value parameter). The command is applicable when dmm.func = ―dcvolts‖ (0 to 303,
default 303), ―acvolts‖ (0 to 303, default 303), ―dccurrent‖ (0 to 3.1, default 3.1),
―accurrent‖ (0 to 3.1, default 3.1), ―twowireohms‖ (0 to 120e6, default 120e6) and
―fourwireohms‖ (0 to 120e6, default 120e6).
NOTE The values in parentheses represent the valid range setting for each function.
An error will be generated if the command is received when dmm.func is:

―temperature‖

―frequency‖

―period‖

―continuity‖

―nofunction‖.
Also, an error will be generated if parameter value does not make sense for selected
function.
Changing functions with dmm.func
The factory default and dmm.reset function value is 303 since the default function is
"dcvolts".
Set this value to the expected measurement value and the unit will select the range
appropriate to measure that value.
To set the range for DC volts to 10:
dmm.func = "dcvolts"
dmm.range = 5
Indicates the type of the thermocouple reference junction.
To read the reference junction type:
value = dmm.refjunction
value: Represents the present reference junction type.
To write the reference junction type:
dmm.refjunction = value
value: Represents the desired reference junction type. Use one of the following values:

dmm.REF_JUNCTION_SIMULATED or 0

dmm.REF_JUNCTION_INTERNAL or 1

dmm.REF_JUNCTION_EXTERNAL or 2
Section 9: Instrument Control Library (ICL)
(on page 9-91) has no effect on this setting.
9-109