Table 1-4 Voltage Measurement Accuracy Limits - Keithley 2425 Service Manual

1-12 Performance Verification
4.
NOTE
5.
6.
Table 1-4
Voltage measurement accuracy limits
Model 2425 source
and measure range
200mV
2V
20V
100V
1
Measure range coupled to source range when simultaneously sourcing and measuring voltage.
2
As measured by multimeter. Use closest possible value and modify reading limits accordingly.
Verify output voltage accuracy for each of the voltages listed in Table 1-4. For
each test point:
• Select the correct source range.
• Set the Model 2425 output voltage to the indicated value as measured by the
digital multimeter.
• Verify that the Model 2425 voltage reading is within the limits given in the
table.
It may not be possible to set the voltage source to the specified value. Use the
closest possible setting, and modify reading limits accordingly.
Repeat the procedure for negative source voltages with the same magnitudes as
those listed in Table 1-4.
Repeat the entire procedure using the rear panel INPUT/OUTPUT jacks. Be sure to
select the rear panel jacks with the front panel TERMINALS key select the rear
panel jacks with the front panel TERMINALS key.
Source voltage
1
200.000mV
2.00000V
20.0000V
100.000V
Model 2425 Service Manual
Model 2425 voltage reading
limits (1 year, 18°C to 28°C)
2
199.676 to 200.324mV
1.99946 to 2.00054V
19.9960 to 20.0040V
99.982 to 100.018V