Tektronix Keithley 2651A Reference Manual page 845

Model 2651A High Power System SourceMeter® Instrument Reference Manual
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Verify that the Model 2651A voltage reading is within the limits given in the table.
Voltage measurement accuracy limits
Source and measure range*
100 mV
1 V
10 V
20 V
40 V
* Measure range coupled to source range when simultaneously sourcing and measuring voltage.
** As measured by precision digital multimeter. Use closest possible value, and modify reading limits
accordingly if necessary. See
7. Repeat the procedure for negative source voltages with the same magnitudes as those listed.
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 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
2651A-901-01 Rev. C October 2021
Source voltage** Voltage reading limits (1 year, 18° C to 28° C)
50.000 mV 49.690 mV to 50.310 mV
90.000 mV 89.682 mV to 90.318 mV
0.50000 V 0.49960 V to 0.50040 V
0.90000 V 0.89952 V to 0.90048 V
5.0000 V 4.9960 V to 5.0040 V
9.0000 V 8.9952 V to 9.0048 V
10.000 V 9.993 V to 10.007 V
18.000 V 17.991 V to 18.009 V
20.000 V 19.984 V to 20.016 V
36.000 V 35.981 V to 36.019 V
Measurement limit calculations
1 2
Source voltage Voltage reading limits (1 year, 18° C to 28° C)
0.50000 V 0.49915 V to 0.50085 V
0.90000 V 0.89895 V to 0.90105 V
Measurement limit calculations
Section 12: Calibration
(on page 12-4).
(on page 12-4).
12-15