1-14 Getting Started
2. Using the right arrow key, select AD-CTRL then press ENTER to display A/D
CONTROLS.
3. Select LINE-FREQ, then press ENTER to display LINE FREQUENCY.
4. Place the cursor on 50Hz, 60Hz, or AUTO, and press ENTER. (Use 50Hz for 400Hz
operation.)
5. Press EXIT to return to normal display.
Remote command line frequency
Table 1-1 summarizes remote commands used to control line frequency. See Section 17 for
additional information on using these commands.
Programming examples
50 or 400Hz operation:
:SYST:LFR 50
Auto frequency operation:
:SYST:LFR:AUTO ON
Fuse replacement
A rear panel fuse protects the power line input of the SourceMeter. If the line fuse needs to
be replaced, perform the following steps:
1. The fuse is located in a drawer above the AC receptacle. See Figure 1-2. At the bottom
of the fuse drawer is a small tab. At this location, use a small bladed screwdriver to pry
the fuse drawer open.
2. Slide the fuse drawer out to gain access to the fuse. Note that the fuse drawer does not
pull all the way out of the power module.
CAUTION For continued protection against fire or instrument damage, replace the
fuse only with the type and rating listed. If the instrument repeatedly
blows fuses, locate and correct the cause of the problem before replacing
the fuse.
3. Snap the fuse out of the drawer and replace it with the same type (250V, 2.5A,
5 × 20mm). The Keithley part number is FU-72.
4. Push the fuse drawer back into the power module.
Table 1-1
Line frequency remote commands
Commands Description
:SYSTem:LFRequency <freq>
:SYSTem:LFRequency:AUTO <state>
Select line frequency (freq = 50 or 60).
Enable/disable auto frequency (state = ON or OFF).
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