Keithley 2450 User Manual

Section
8: TSP command reference Model 2450 Interactive SourceMeter® Instrument
Reference Manual
8-2 2450-901-01 Rev. B/September 2013
Parameters for functions
All functions must have a set of parentheses () immediately following the function. If there are
parameters for the function, they are placed between the parentheses. The parentheses are required
even when there are no parameters specified.
The following example shows the beeper.beep() function, where 2 is the duration in seconds and
2400 is the frequency. Note that the parameters are inside the parentheses:
beeper.beep(2, 2400)
The command below resets the local node (no parameters are needed):
localnode.reset()
Multiple parameters
Multiple parameters must be separated by commas.
For example, the following commands set the beeper to emit a double-beep at 2400 Hz, with a beep
sequence of 0.5 seconds on, a delay of 0.25 seconds, and then 0.5 seconds on:
beeper.beep(0.5, 2400)
delay(0.250)
beeper.beep(0.5, 2400)
Time and date values
Time and date values are represented as the number of seconds since some base. The time bases
are:
• UTC 12:00 am Jan 1, 1970. Some examples of UTC time are reading buffer timestamps,
calibration adjustment and verification dates, and the value returned by os.time().
• Event. Time referenced to an event, such as the first reading stored in a reading buffer.
Local and remote control
The instrument can be controlled locally or remotely.
When the instrument is controlled locally, you can operate the instrument using the front-panel
controls. When it is controlled remotely, you operate the instrument through a controller (usually a
computer). When the instrument is first powered on, it is controlled locally.
The front panel displays the present type of control. When the instrument is in local control, the
REMOTE LED in the upper right corner is off and the control indicator on the upper left of the screen
shows LOCAL.
When the instrument is in remote control, the front-panel REMOTE LED is on and the control
indicator at the top left of the screen shows the type of communication interface.

Keithley 2450 Specifications

General

Model	2450
Category	SourceMeter
Voltage Source Range	±200 V
Current Source Range	±1 A
DC Voltage	200 V
DC Current	1 A
Power Output	20 W
Resolution	6.5 digits
Display	5-inch capacitive touchscreen
Operating Temperature	0°C to 50°C
Connectivity	USB, LAN, GPIB
Dimensions	213 mm × 88 mm × 370 mm