Tektronix KEITHLEY SourceMeter 2600B Series User Manual page 73

Series 2600B System SourceMeter® instrument User's Manual
When sourcing voltage with remote sense, the instrument relies on the voltage detected with the
sense lines to provide the proper closed-loop control of its output voltage and to properly limit the
voltage across the device-under-test. If a sense line becomes disconnected from its corresponding
force line, an erroneous voltage is sensed. The output voltage may be adjusted to a level that is
radically different than the programmed voltage level (possibly to hazardous levels, depending on the
model). In addition, the voltage across the device may exceed the programmed source limit voltage,
possibly causing damage to the device or test fixture.
In both cases, the voltage is not measured correctly if a sense lead becomes disconnected from its
corresponding force lead.
Even with the overvoltage protection set to the lowest value (2 V), never touch anything
connected to the terminals of the 2600B when the instrument is on. Always assume that a
hazardous voltage (greater than 30 V
damage to the device under test or external circuitry, do not set the voltage source to levels
that exceed the value that is set for overvoltage protection.
For the 2601B, 2602B, 2611B, 2612B, 2635B, and 2636B, you can use contact check to verify that
the sense leads are connected before enabling remote sensing or before turning on the output. Refer
to Contact check measurements
Use 4-wire remote sensing for the following source-measure conditions:
•
Sourcing or measuring voltage in low impedance (<1 kΩ) test circuits.
•
Enforcing voltage compliance limit directly at the DUT.
When using 4-wire local sensing connections, make sure to properly configure the
selection (on page 4-30).
2600BS-900-01 Rev. A / August 2021
) is present when the instrument is on. To prevent
RMS
(on page 4-14).
Figure 29: Four-wire connections (remote sensing)
Section 4: Operation
Sense mode
4-13