Keithley 2450 User Manual

Model 2450
Interactive SourceMeter® Instrument Reference Manual Section 8:
TSP command reference
2450-901-01 Rev. B/September 2013 8-69
localnode.gettime()
This function retrieves the instrument date and time.
Type TSP-Link accessible
Affected by Where saved Default value
Function
Yes
Usage
localnode.gettime()
Details
The time is returned in UTC time. UTC time is specified as the number of seconds since Jan 1, 1970, UTC. You
can use UTC time from a local time specification, or you can use UTC time from another source (for example,
your computer).
Example
print(os.date('%c', gettime()))
Example output:
Wed Mar 31 14:25:31 2010
Also see
localnode.settime() (on page 8-72)
localnode.linefreq
This attribute contains the power line frequency setting that is used for NPLC calculations.
Type TSP-Link accessible Affected by Where saved Default value
Attribute (R)
Yes
Power cycle
Not applicable
Not applicable
Usage
frequency = localnode.linefreq
frequency
The detected line frequency: 50 or 60
Details
The instrument automatically detects the power line frequency (either 50 Hz or 60 Hz) at each power-up. This
detected line frequency is used for aperture (NPLC) calculations.
If you are using this command from a remote node, replace localnode with the node reference, for example,
node[5].linefreq.
Example
frequency = localnode.linefreq
print(frequency)
Reads line frequency setting.
Also see
None

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