
Series 3700 System Switch/Multimeter Reference Manual
Section 9
:
Instrument Control Library (ICL)
Document Number: 3700S-901-01 Rev. A / August 2007
9-115
dmm.rtddelta
Remarks
This attribute is only valid when
dmm.func = "temperature"
. All other
configurations generate an error and return nil when queried. Also, get errors if
parameter value out of range. The valid range for user delta is 0 to 5.
NOTE
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 unique settings are
desired, they must be changed, or if they are the same, use two different DMM
configurations.
Changing functions with
dmm.func
(on page 9-91) has no effect on this setting.
The factory default and
dmm.reset
(on page 9-112) function value is 1.507.
Also see
dmm.rtdalpha
(on page 9-113)
dmm.rtdbeta
(on page 9-113)
dmm.rtdzero
(on page 9-115)
Example
To set user delta constant for RTD to 3:
dmm.func = "temperature"
dmm.rtddelta = 3
dmm.rtdzero
Attribute
Indicates the user type RTD zero value.
Usage
To read the user type RTD zero value:
value = dmm.rtdzero
value
: Represents the present user type RTD zero value.
To write the user type RTD zero value:
dmm.rtdzero = value
value
: Represents the desired user type RTD zero value.
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.
NOTE
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 unique settings are
desired, they must be changed, or if they are the same, use two different DMM
configurations.
Changing functions with
dmm.func
(on page 9-91) has no effect on this setting.
The factory default and
dmm.reset
(on page 9-112) function value is 100.