Dmm.rtdbeta - Keithley 3700A Series Reference Manual

Series 3700A System Switch/Multimeter Reference Manual
Example 2
dmm.func = "temperature"
dmm.transducer = dmm.TEMP_THREERTD
dmm.rtdalpha = 0.005
dmm.configure.set("RTD_3wire")
dmm.transducer = dmm.TEMP_FOURRTD
dmm.rtdalpha = 0.007
dmm.configure.set("RTD_4wire")
dmm.configure.recall("RTD_3wire")
print(dmm.transducer, dmm.rtdalpha)
dmm.configure.recall("RTD_4wire")
print(dmm.transducer, dmm.rtdalpha)
Also see
dmm.configure.recall()
dmm.configure.set()

dmm.rtdbeta

dmm.rtddelta
dmm.rtdzero
dmm.transducer
dmm.rtdbeta
This attribute contains the beta value of a user-defined RTD.
Type TSP-Link accessible
Attribute (RW) Yes
Usage
value = dmm.rtdbeta
dmm.rtdbeta = value
value
Details
This attribute is only valid when dmm.func is set to "temperature". All other functions generate an
error and return nil when queried.
This setting only applies when the transducer type is set to 3 or 4-wire RTD. For other transducer
types, the setting is set but not used until the transducer type is set to an RTD type.
The RTD beta setting is saved with the dmm.func function setting, so if you use another function,
then return to "temperature", the RTD beta setting you set previously is retained.
The following attributes share common settings and apply to both 3 and 4-wire RTDs:
dmm.rtdalpha, dmm.rtdbeta, dmm.rtddelta, and dmm.rtdzero. Therefore, when both 3 and
4-wire RTDs are set to USER type for RTD, switching transducers between 3 and 4 will cause both
to use the same settings (for example, dmm.rtdalpha, dmm.rtdbeta). If you need unique
settings, the settings must be changed, or use two different DMM configurations.
3700AS-901-01 Rev. D/June 2018
(on page 11-165)
(on page 11-166)
(on page 11-221)
(on page 11-222)
(on page 11-224)
(on page 11-233)
Affected by
Reset
DMM reset
Recall setup
The RTD beta value: 0 to 1
This example sets unique alpha constants for 3-wire and
4-wire RTDs by creating two DMM configurations with
the settings.
Output:
3.000000000e+00
4.000000000e+00
Where saved Default value
Create configuration script 1.086300E-01
Save setup
Section 11: TSP command reference
5.000000000e-03
7.000000000e-03
11-221