Keithley 2651A Reference Manual page 707

Model 2651A High Power System SourceMeter® Instrument Reference Manual
Output current accuracy limits
Source range
20 A
50 A (pulse)
1. Modify current limits if necessary. See
2. Verification of a pulsed output (levels greater than 20 A on the 50 A range) is accomplished during
current measurement verification test procedure. See
5. Repeat the procedure for negative output currents with the same magnitudes as those listed.
6. Turn the output off, and change connections as shown in
range and above)
7. Select the DMM DC volts function.
8. Repeat steps 4 through 6 for the 1 A through 20 A ranges, and the 20.0000 A (DC level) output
setting for the 50 A (pulse) range. Calculate the current from the DMM voltage reading and the
characterized 0.1 Ω resistance value: I=V/R
Figure 112: Connections for current verification (100 mA range and below)
Model 2651A
LINE FUSE
SLOWBLOW
5.0 A, 250 V
LINE RATING
100-240 VAC
50, 60 Hz
500VA MAX.
IEEE-488
2651A-901-01 Rev. A / March 2011
Output current setting
10.0000 A
18.0000 A
20.0000 A (DC level)
45.0000 A (pulse)
Source limits calculations
(on page B-8) (use the 0.1 Ω resistor as shown).
Digital multimeter
DIGITAL I/O
RS-232
LAN
!
!
NO INTERNAL OPERATOR SERVICEABLE PARTS,
WARNING: SERVICE BY QUALIFIED PERSONNEL ONLY.
REPLACE FUSE WITH SAME TYPE AND RATING.
1
Output current limits
(1 year, 18° C to 28° C)
9.977 A to 10.023 A
17.965 A to 18.035 A
19.890 A to 20.110 A
2
44.853 A to 45.148 A
(on page B-3).
Current measurement accuracy
Connections for current verification (1 A
Input
Amps
LO
SENSE/GUARD
OUTPUT
S S LO HI
LO G G G G HI
40V, 50A MAX.
CHANNEL A
!
HI
LO
Appendix B: Calibration
(on page B-8).
B-7