Keithley 2302 User Manual

14-10 Calibration
6. Using the edit keys, adjust the display to agree with the new DMM voltage reading, then
press ENTER. The unit will prompt for Channel #2 DVM full-scale calibration:
CAL DVM CHAN 2
ALL READY TO DO?
7. Press ENTER to complete Channel #2 DVM full-scale calibration.
8. Connect the digital multimeter volts input and characterized 4Ω resistor
to the
Model 2306 OUTPUT #2 SOURCE terminals using the same general connections
sho
wn in Figure 14-2. Be sure to observe proper polarity (SOURCE + to DMM INPUT
HI; SOURCE - to INPUT LO).
9. Be sure the digital multimeter DC
volts function and auto-ranging are still selected.
10. At this point, the unit will prompt for 5A Channel #2 full-scale calibration output:
CAL 5 A CHAN 2
SET 1.90000 A
11. Using the edit keys, adjust the set value to 1.9000A, then press ENTER. The unit will
prompt you for the DMM reading, which calibrates the Channel #2 5A current limit:
CAL 5 A CHAN 2
READ1 1.90000 A
12. Note the DMM voltage reading, then calculate the current from that reading and the
actual 4Ω resistance value: I = V/R. Adjust the Model 2306 current display value to
agree with the calculated current value, and press ENTER.
13. The Model 2306 will prompt for another DMM reading, which is used for Channel #2
5A measurement calibration:
CAL 5 A CHAN 2
READ2 1.90000 A
14. Again, calculate the current from the new DMM reading and 4Ω resistor value. Adjust
the 2306 current display reading to agree with the new current, then press ENTER.
15. Disconnect the 4Ω
resistor, then connect the 3kΩ resistor in its place. (Use the
connections in Figure 14-3 except make connections to the OUTPUT #2 terminals.)
16. Make sure the DMM DC v
olts function and auto-ranging are still selected.
17. At this point, the unit will prompt to output approximately 5mA for Channel #2 5mA
range full-scale calibration:
CAL 5 mA CHAN 2
ALL READY TO DO?
18. Press ENTER to output approximately 5mA. The unit will then prompt you for the
DMM reading:
CAL 5 mA CHAN 2
READ1 4.50000 mA
19. Note the DMM voltage reading, then calculate the current from that voltage reading and
actual 3kΩ resistance value. Adjust the Model 2306 current display value to agree with
that value and press ENTER.
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Keithley 2302 Specifications

General

Brand	Keithley
Model	2302
Category	Power Supply
Language	English