Section 4: Sourcing and measuring Model 2601B-PULSE System SourceMeter Instrument Reference Manual
4-46 2601B-PULSE-901-01A April 2020
When using the 2601B-PULSE as a voltmeter, the voltage compliance limit must be set higher
than the voltage that is being measured. Failure to do this could result in excessive current
flow into the 2601B-PULSE, incorrect measurements, and possible damage to the instrument.
3. Use the RANGE keys to select a fixed measurement range that will accommodate the expected
reading. Use the lowest possible range for best accuracy. You can also select autorange, which
automatically sets the 2601B-PULSE to the most sensitive range.
4. Connect the voltage or current to be measured. Make sure to use 2-wire connections from the
2601B-PULSE to the device under test (DUT) (see DUT test connections (on page 4-6)).
5. Press the OUTPUT ON/OFF control to turn the output on.
6. View the displayed reading (press the TRIG key if necessary).
When finished, press the OUTPUT ON/OFF control to turn the output off.
Ohms measurements
Resistance readings are calculated from the measured current and measured voltage as follows:
R = V/I
Where:
R is the calculated resistance
V is the measured voltage
I is the measured current
Ohms ranging
The front panel ohms function does not use ranging. The instrument formats a calculated resistance
reading (V/I) to best fit the display. There may be leading zeros if the ohms reading is less than 1 mΩ.
Basic ohms measurement procedure
When you use the MODE key to select ohms measurement, the 2601B-PULSE 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
2601B-PULSE is already connected to the device under test (see DUT test connections (on
page 4-6)).
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