Test Connections - Keithley 2450 Reference Manual

Section 2: General operation
To generate an audible tone from the SCPI remote interface:
:SYSTem:BEEPer <frequency, time>
Where frequency is the frequency of the sound and time is the length of the sound in seconds.
To general an audible tone from the TSP command interface:
Send the following command:
beeper.beep(duration, frequency)
Where duration is the length of the sound in seconds and frequency is the frequency of the
sound.

Test connections

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 output is on.
To prevent electric shock, test connections must be configured such that the user cannot
come in contact with conductors or any device under test (DUT) that is in contact with the
conductors. It is good practice to disconnect DUTs from the instrument before powering the
instrument. Safe installation requires proper shields, barriers, and grounding to prevent
contact with conductors.
There is no internal connection between protective earth (safety ground) and the LO
terminals of the Model 2450. Therefore, hazardous voltages (more than 30 V
on LO terminals. This can occur when the instrument is operating in any mode. To prevent
hazardous voltage from appearing on the LO terminals, connect the LO terminal to
protective earth if your application allows it. You can connect the LO terminal to the chassis
ground terminal on the front panel or the chassis ground screw terminal on the rear panel.
Note that the front-panel terminals are isolated from the rear-panel terminals. Therefore, if
you are using the front-panel terminals, ground to the front-panel LO terminal. If using the
rear-panel terminals, ground to the rear panel LO terminal.
You can make test connections to the Model 2450 from the rear or front panel of the instrument.
The basic connection configurations for the Model 2450 include:
•
Two-wire sensing
•
Four-wire remote sensing
•
Guard
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Model 2450 Interactive SourceMeter® Instrument Reference Manual
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2450-901-01 Rev. B/September 2013