Keithley 263 User Manual

PERFORMANCE VERIFICATION
6.6.4 AMPS (200pA-2mA) Accuracy Checks
9. Again, calculate the current (as in step 6) and verify that
it is -1O.OOOOpA f3.SnA.
Using Table 6-5, perform the following steps to verify the
accuracy of the 200pA through 2mA ranges of the active
10. Program the Model 263 for 19.0000pA calculate the
(AMPS) current source:
current and verify that it is within the limits listed in the
table. Repeat for -19.0000pA.
1. Connect the Model 263 to the Model 196 and Fluke
Model 54SOA as shown in Figure 6-3.
2. Set the Model 263 to the 20pA range, the Model 196 to
the 3V range and the Model 54SOA to output 1OOkR
(nominal).
3. Program the Model 263 to output O.OOOOpA (use ZERO
button).
4. On the Model 196, press the ZERO button to zero its
display.
NOTE
If using a DMM that does not have zero correction
capability, record the zero offset and subtract it
from the DMM reading in the next step.
11. Disable ZERO on the Model 196.
12. Connect the VOLTS OHMS terminals of the Model 196
to the SENSE terminals of the Model 54SOA as shown
in Figure 6-3.
13. Set the 263 to the 200pA range, the Model 196 to the
3V range and the Model 54SOA to output 10kn.
14. Program the Model 263 to output OO.OOOpA.
15. On the Model 196, press the ZERO button to zero the
display.
NOTE
If using a DMM that does not have zero correction
capability, record the zero offset and subtract it
from the DMM reading in the next step.
5. Program the Model 263 to output lO.OOOOpA and
record the Model 196 DMM voltage reading and the
Model 54SOA resistance reading in Table 6-S.
6. To determine the actual current output by the Model
263, divide the reading on the Model 196 (voltage drop
across the resistor) by the reading on the Model 5450A
(resistor value).
7. Verify that the calculated current is lO.OOOOpA f3SnA.
8. On the Model 263, press the i button to output
-1O.OOOOpA.
16. Program the Model 263 to output 190.000pA, and
record the Model 196 DMM voltage reading and the
Model 54SOA resistance reading in the table.
17. Calculate the current and verify that it is within the
allowable limits.
18. Disable ZERO on the Model 263.
19. Using Table 6-S as a guide, repeat the basic procedure
in steps 13 through 18 for the 2mA range.
Figure 6-3. AMPS (200pA-2mA Ranges) Accuracy Checks
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6-6

Keithley 263 Specifications

General

Brand	Keithley
Model	263
Category	Test Equipment
Language	English