Keithley 2657A, Reference Manual, Page: 33 / 805

Model 2657A High Power System SourceMeter® Instrument Reference Manual Section 2: General operation
2657A-901-01 Rev. B/December 2012 2-9
Line frequency configuration
At the factory, each Model 2657A is configured to match the power line frequency appropriate for
your country (either 50 Hz or 60 Hz). This line frequency is used for aperture (NPLC) calculations.
To configure the line frequency from the front panel:
1. Press the
MENU
key, then turn the navigation wheel to select
LINE-FREQ
, and then press the
ENTER
key.
2. Turn the navigation wheel to select the appropriate frequency and then press the
ENTER
key.
3. Press the
EXIT (LOCAL)
key to return to the previous display.
To configure the line frequency from a remote interface:
Set the
localnode.linefreq
attribute to the desired value (50 or 60). The following programming
example illustrates how to set the line frequency to 60 Hz:
localnode.linefreq = 60
Fuse replacement
A rear panel fuse drawer is located below the AC receptacle (refer to Rear panel (on page 2-5)). This
fuse protects the power line input of the instrument. If the line fuse needs to be replaced, refer to Line
fuse replacement (on page A-1).
System information
You can display serial number, firmware revision, and calibration dates by selecting
SYSTEM
-
INFO
from the main menu.
To view the system information from the front panel:
1. Press the
MENU
key.
2. Select
SYSTEM
-
INFO
.
3. Select one of the following:
•
FIRMWARE
•
SERIAL#
•
CAL
•
MEMORY-USAGE
To retrieve system information from a remote interface:
To retrieve the firmware revision and serial number, send the
*IDN?
query (see Identification query:
*IDN? (on page D-3) for more information).
To determine memory usage, see the meminfo() (on page 7-143) function.
To determine when calibration was last run, see smuX.cal.date (on page 7-179).
To determine when calibration is due, see smuX.cal.due (on page 7-180).