Multiple Channel Operation - Keithley SourceMeter 2790 Reference Manual

Model 2790 SourceMeter
Remote programming example (system channel operation)
The following example assumes a Model 7702 installed in slot 2 and the Ω4 function of
the Model 2790 is selected. This command sequence connects channel 201 and its paired
channel (221) to DMM Input and Sense as shown in
ROUT:OPEN:ALL
ROUT:CLOS (@201)

Multiple channel operation

Multiple channel operation allows individual control of each channel in the test system. It
allows any channel (or channels) in the test system to be closed or opened. Channels for the
7751, 7752, and 7753 modules are controlled using multiple channel operation. The simpli-
fied schematic of the 7751/7752/7753 module is shown in
klqb
t^okfkd
®
Switch System Reference Manual
c. ROUTe:CLOSe?
This query command returns a <clist> of closed measurement channels, including
paired channels for 4-wire functions.
This query command will not return non-measurement channels, such as
backplane isolation channels and the pole-mode channel.
d. ROUTe:OPEN:ALL
This command functions the same as the front panel OPEN key (ALL menu
option). It simply opens all channels (including non-measurement channels)
installed in the mainframe.
Multiple channel operation is not typically used to control 7702 switching
channels. For most test applications, only system channel operation should be
used to control the 7702 module. One exception is when you use the 7702 in
conjunction with a 7751/7752/7753 module. In this case, multiple channel
operation is recommended to avoid anomalous behavior.
When using an external source with a 7702 module, careless multiple
channel operation could create a hazard that could result in severe
injury or death. Improper operation can also cause damage to the
switching modules and external circuitry. Multiple channel operation
should be restricted to experienced test engineers who recognize the
dangers associated with multiple channel closures.
Figure 2-2.
' Open all channels.
' Close channels 201, 221, 243,
' 244, and 245.
Figure 2-12.
2-13