User manual

Section 13: Instrument Control Library (ICL) Series 3700 System Switch/Multimeter Reference Manual
13-158 3700S-901-01 Rev. C / July 2008
dmm.refjunction
Attribute
Indicates the type of the thermocouple reference junction.
Usage
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
Remarks
This attribute is only valid when dmm.func = "temperature". All other
configurations generate an error and return nil when queried. When on temperature,
the setting is only applicable when the transducer type is set for thermocouple. For all
other transducer types, the reference junction may be set, but will be ignored until the
transducer type is set to thermocouple.
Changing functions with dmm.func (on page 13-137) will reflect the reference junction
setting for that function.
The factory default and dmm.reset() (on page 13-161) function value is
dmm.REF_JUNCTION_INTERNAL.
Details
The default value is internal; change to simulated or external as needed.
Example
To enable the simulated thermocouple reference junction:
dmm.func = "temperature"
dmm.transducer = dmm.TEMP_THERMOCOUPLE
dmm.refjunction = dmm.REF_JUNCTION_SIMULATED
dmm.rel.acquire()
Function
Acquires an internal measurement to store as the relative (REL) level value.
Usage
rel_value = print(dmm.rel.acquire())
rel_value: The internal measurement acquired for the relative (REL) level value.