User manual

Series 3700 System Switch/Multimeter Reference Manual Section 13: Instrument Control Library (ICL)
3700S-901-01 Rev. C / July 2008 13-159
dmm.rel.acquire()
Remarks
This function triggers the DMM to take a new measurement for the selected function.
This measurement will then be stored as the new REL level setting.
This function will return the acquired reading or nil, if an error occurred. An error will be
generated if the active function does not support a REL level setting or the DMM is
unable to take the measurement. When an error occurs, the REL level setting
maintains the last valid setting.
The command will generate an error when dmm.func (on page 13-137) equals one of
the following:
"continuity"
"nofunction"
After executing this command, use the dmm.rel.level (on page 13-160) attribute to see
the last REL level value that was acquired or set by the user. Setting the REL level
with this acquire function does not use the math, limit, and filter settings. It will be a
calibrated reading as if these settings are disabled.
Also see
dmm.rel.level (on page 13-160)
Example
To acquire a REL level value for temperature:
dmm.func = "temperature"
rel_value = dmm.rel.acquire()
dmm.rel.enable
Attribute
Enables or disables relative measurement control for the DMM.
Usage
To read the relative control state:
value = dmm.rel.enable
value: Represents the present relative enable setting.
To write the relative control state:
dmm.rel.enable = value
value: Represents the desired relative measurement control setting. Set to one of the
following:
dmm.ON or 1 to enable relative measurements
dmm.OFF or 0 to disable relative measurements