Keithley SourceMeter 2425, Руководство по обслуживанию

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Model 2425 Service Manual Performance Verification 1-11
4. Verify output voltage accuracy for each of the voltages listed in Table 1-3. For
each test point:
• Select the correct source range.
• Set the Model 2425 output voltage to the indicated value.
• Verify that the multimeter reading is within the limits given in the table.
5. Repeat the procedure for negative output voltages with the same magnitudes as
those listed in Table 1-3.
6. 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.
Table 1-3
Output voltage accuracy limits
Model 2425
source range
Model 2425 output
voltage setting
Output voltage limits
(1 year, 18°C to 28°C)
200mV
2V
20V
100V 200.000mV
2.00000V
20.0000V
100.000V 199.360 to 200.640mV
1.99900 to 2.00100V
19.9936 to 20.0064V
99.968 to 100.032V
Voltage measurement accuracy
Follow the steps below to verify that Model 2425 voltage measurement accuracy is within
specified limits. The test involves setting the source voltage to full-range values, as mea-
sured by a precision digital multimeter, and then verifying that the Model 2425 voltage
readings are within required limits.
1. With the power off, connect the digital multimeter to the Model 2425 INPUT/
OUTPUT jacks, as shown in Figure 1-1.
2. Select the multimeter DC volts function.
3. Set the Model 2425 to both source and measure voltage by pressing the SOURCE
V and MEAS V keys, and make sure the source output is turned on.