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Section

2: General operation Model 2450 Interactive SourceMeter® Instrument

Reference Manual

2-6 2450-901-01 Rev. B/September 2013

Turning the Model 2450 output off

Turning the Model 2450 output off does not place the instrument in a safe state (an interlock

is provided for this function).

Hazardous voltages may be present on all output and guard terminals. To prevent electrical

shock that could cause injury or death, never make or break connections to the Model 2450

while the instrument is powered on. Turn off the equipment from the front panel or

disconnect the main power cord from the rear of the Model 2450 before handling cables.

Putting the equipment into an output-off state does not guarantee that the outputs are

powered off if a hardware or software fault occurs.

When the source of the instrument is turned off, it may not completely isolate the instrument from the

external circuit. You can use the output-off setting to place the Model 2450 in a known, noninteractive

state during idle periods, such as when changing the device under test. The output-off states that can

be selected for a Model 2450 are normal, high-impedance, zero, or guard. See Output-off state

(on

page 2-82) for additional detail.

Using the front panel:

Press the OUTPUT ON/OFF switch. The instrument is in the output-on state when the switch is

illuminated. The instrument is in the output-off state when the switch is not illuminated.

Using SCPI commands:

To turn the output on, send the command:

:OUTPut:STATe ON

To turn the output off, send the command:

:OUTPut:STATe OFF

Using TSP commands:

To turn the output on, send the command:

smu.source.output = smu.ON

To turn the output off, send the command:

smu.source.output = smu.OFF

Keithley 2450 User Manual

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