Section 2: General operation
2606B System SourceMeter® Instrument Reference Manual
2-46
2606B-901-01 Rev. B / May 2018
Basic ohms measurement procedure
When you use the MODE key to select ohms measurement, the 2606B is automatically configured as
a current source with a level of 1 mA. To change the source function, source value, or compliance
value (in other words, customize the standard ohmmeter configuration of the MODE key), then use
the following steps to make ohms measurements. The following procedure assumes that the 2606B is
already connected to the device under test (see
(on page 2-54)).
To make an ohms measurement:
1. Press the
DISPLAY
key to select single-channel display mode. See
(on page 2-
2. Press the
SRC
key to select the source function.
3. Set the output source (current or voltage, dependent on which function is selected) to a value
based on the expected resistance. See
Step 1: Select and set the source level
(on page 2-39)
earlier in this section.
4. Press the
LIMIT
key to edit the voltage or current limit. When programming a voltage limit, set the
voltage limit above the maximum expected voltage across the resistor under test. When
programming a current limit, set the current limit at or above the maximum expected current
through the resistor under test. See
Step 2: Set the compliance limit
(on page 2-39) earlier in this
section.
5. Press the
MEAS
key to display voltage or current.
6. Make sure that AUTO measurement range is on (press the
AUTO
key if needed).
7. Press the
MEAS
key as many times as needed to display ohms.
8. Press the
OUTPUT ON/OFF
control to turn the output on.
9. View the displayed reading (press the
TRIG
key if necessary). When finished, press the
OUTPUT
ON/OFF
control again to turn the output off.
Remote ohms command
Use the
smu
X
.measure.r()
function to get a resistance reading. The programming example below
illustrates how to get a resistance reading from SMU A:
reading = smua.measure.r()
See
Remote source-measure commands
(on page 2-40) for more commands necessary to set up
source and measure functions, and
(on page 5-1) for more details.
Ohms programming example
The following programming example illustrates the setup and command sequence of a typical ohms
measurement procedure with the following parameters:
•
Source function: current, 10 mA range, 10 mA output
•
Voltage measure range: auto
•
Voltage compliance: 10 V
•
Sense mode: 4-wire