Model 2651A High Power System SourceMeter® Instrument Reference Manual
Appendix B: Calibration
2651A-901-01 Rev. A / March 2011
B-15
5. Make sure the source output is turned on (if off, press the
OUTPUT ON/OFF
control).
6. Verify voltage measurement accuracy for each of the voltages listed in the table (see below). For
each test point:
•
Select the correct source range.
•
Set the Model 2651A output voltage such that the digital multimeter reading is the value indicated in the
source voltage column of the table below. It may not be possible to set the voltage source to get exactly
the required reading on the digital multimeter. Use the closest possible setting and modify the reading
limits accordingly.
•
If necessary, press the
TRIG
key to display readings.
•
Verify that the Model 2651A voltage reading is within the limits given in the table.
Voltage measurement accuracy limits
Source and measure range
1
Source
voltage
2
Voltage reading limits (1 year, 18° C to 28° C)
100 mV
50.000 mV
49.690 mV to 50.310 mV
90.000 mV
89.682 mV to 90.318 mV
1 V
0.50000 V
0.49960 V to 0.50040 V
0.90000 V
0.89952 V to 0.90048 V
10 V
5.0000 V
4.9960 V to 5.0040 V
9.0000 V
8.9952 V to 9.0048 V
20 V
10.000 V
9.993 V to 10.007 V
18.000 V
17.991 V to 18.009 V
40 V
20.000 V
19.984 V to 20.016 V
36.000 V
35.981 V to 36.019 V
1. Measure range coupled to source range when simultaneously sourcing and measuring voltage.
2. As measured by precision digital multimeter. Use closest possible value, and modify reading limits
accordingly if necessary. See
Measurement limits calculations
(on page B-4).
7. Repeat the procedure for negative source voltages with the same magnitudes as those listed in
the table (see above).
8. Perform high speed verification procedure for the High Speed ADC Volts measurements:
a. Change to using the high-speed ADC by pressing the
SPEED
key and then selecting FAST
from the menu.
b. Repeat the procedure (step 6) for each of the voltages listed in the following table.
c. Repeat the procedure for negative source voltages with the same magnitudes as those listed
in the following table.
d. Change back to the integrating ADC by pressing the
SPEED
key and then selecting
NORMAL from the menu.
High Speed ADC Volts measurement accuracy limits
Source and measure range
1
Source
voltage
2
Voltage reading limits (1 year, 18° C to 28° C)
1 V
0.50000 V
0.49915 V to 0.50085 V
0.90000 V
0.89895 V to 0.90105 V
1. Measure range coupled to source range when simultaneously sourcing and measuring voltage.
2. As measured by precision digital multimeter. Use closest possible value, and modify reading limits
accordingly if necessary. See
Measurement limits calculations
(on page B-4).
