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
(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
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
(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
G
G G G
S
LO
SENSE/GUARD
S
HI
LO
HI
OUTPUT
40V, 50A MAX.
!
Amps
Digital multimeter