Model 2651A High Power System SourceMeter® Instrument Reference Manual Appendix B: Calibration
2651A-901-01 Rev. A / March 2011 B-7
Output current accuracy limits
Source range Output current setting
1
Output current limits
(1 year, 18° C to 28° C)
20 A 10.0000 A 9.977 A to 10.023 A
18.0000 A 17.965 A to 18.035 A
50 A (pulse) 20.0000 A (DC level) 19.890 A to 20.110 A
45.0000 A (pulse)
2
44.853 A to 45.148 A
1. Modify current limits if necessary. See Source limits calculations (on page B-3).
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 Current measurement accuracy
(on page B-8).
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 Connections for current verification (1 A
range and above) (on page B-8) (use the 0.1 Ω resistor as shown).
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)
LO
HI
Input
LO
Model 2651A
!
LINE RATING
100-240 VAC
50, 60 Hz
500VA MAX.
LINE FUSE
SLOWBLOW
5.0 A, 250 V
NO INTERNAL OPERATOR SERVICEABLE PARTS,
SERVICE BY QUALIFIED PERSONNEL ONLY.
REPLACE FUSE WITH SAME TYPE AND RATING.
WARNING:
CHANNEL A
RS-232
DIGITAL I/O
LAN
!
IEEE-488
GGGG
S
LO
SENSE/GUARD
S
HI
LO HI
OUTPUT
40V, 50A MAX.
!
Amps
Digital multimeter
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