Keithley 3700 Series User Manual

Section 11: TSP command reference Series 3700A System Switch/Multimeter Reference Manual
11-218 3700AS-901-01 Rev. D/June 2018
dmm.rel.level
The offset value for relative measurements for the function selected by dmm.func.
Type
TSP-Link accessible
Affected by
Where saved
Default value
Attribute (RW)
Yes
Reset
DMM reset
Recall setup
Create configuration script
Save setup
0.000000E+000
Usage
value = dmm.rel.level
dmm.rel.level = value
value
The relative offset level setting
Details
This attribute is not available if dmm.func is set to "continuity" or "nofunction". If you query
this attribute when either of these functions is selected, nil is returned.
When relative measurements are enabled (as set by dmm.rel.enable), all subsequent measured
readings are offset by the specified relative offset value. Specifically, each returned measured relative
reading is the result of the following calculation:
Relative reading = Actual measured reading – Relative offset value
Changing functions with dmm.func reflects the relative level offset setting for that function.
The relative offset level setting is saved with the dmm.func function setting, so if you use another
function, then return to the previous function, the relative offset level settings you set previously are
retained.
To set the relative offset level to include math, limits, and filter operations (if enabled) set
dmm.rel.level to dmm.measure(). However, these operations are not used if you use the
dmm.rel.acquire() function to set the relative offset level, even if the operations are enabled.
An error is generated:
• If dmm.func is set to "continuity" or "nofunction".
• If the value is out of range for the selected function.
Example
dmm.func = "accurrent"
dmm.rel.level = dmm.measure()
rel_value = dmm.measure()
dmm.rel.level = rel_value
dmm.func = "temperature"
rel_value = dmm.rel.acquire()
Perform an AC current measurement and use it as the relative
offset value.
Take a measurement and store it in the variable rel_value.
Use the rel_value to set the relative level attribute.
Acquire a relative offset level value for temperature.

Keithley 3700 Series Specifications

General

Brand	Keithley
Model	3700 Series
Category	Multimeter
Language	English