User manual

Section 13: Instrument Control Library (ICL) Series 3700 System Switch/Multimeter Reference Manual
13-166 3700S-901-01 Rev. C / July 2008
dmm.rtdzero
Remarks
This attribute is only valid when dmm.func = "temperature". All other
configurations generate an error and return nil when queried. Errors will also be
generated if the parameter value is out of range. The valid range for user zero is 0 to
10000. For temperature, this setting is used when the transducer type is set to 3 or 4-
wire RTD. For other transducer types, the setting will be set but ignored until the
transducer type is set for an RTD type.
NOTE The following attributes share common settings and apply to both 3 and 4-
wire RTDs: dmm.rtdalpha (on page 13-162), dmm.rtdbeta (on page 13-
163), dmm.rtddelta (on page 13-164), 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 unique settings are desired, they
must be changed, or use two different DMM configurations.
Changing functions with dmm.func (on page 13-137) will reflect the RTD zero setting
for that function.
The factory default and dmm.reset() (on page 13-161) function value is 100.
Also see
dmm.rtdalpha (on page 13-162)
dmm.rtdbeta (on page 13-163)
dmm.rtddelta (on page 13-164)
Example
To set user zero constant for RTD to 300:
dmm.func = "temperature"
dmm.transducer = dmm.TEMP_THREERTD or dmm.TEMP_FOURRTD
dmm.rtdzero = 300
dmm.savebuffer()
Function
Saves data from the specified dynamically-allocated buffer to the USB flash drive
using the specified filename.